Emerson Recommended Contactor Selection for Three Phase Motor Control User Guide

AE10-1244 R19

Recommended Contactor Selection for Three Phase Motor Control

TABLE OF CONTENTS

Safety Instructions ………………………………………2

Instructions pertaining to risk of electric shock, fire and injury to persons…………………………………………3

Introduction / Styles of Contactors …………………….4

Establishing the Compressor Loa d……………………5

Approved Vendors of Time Delay Relays and

Contactors ………………………………………………..7

How to Select a Compressor Contactor ………………7

Tables for Sizing Contactors to Compressors ....13-24

Revision Tracking R19 May 2020

Added 3D Compressors in contactor selection list on

Table 6 and Table 7

Improved 4D, 6D and 8D reference tables to higher resolution

May 2020

© 2020 Emerson Climate Technologies, Inc.

1

AE10-1244 R19

Safety Instructions

Copeland compressors are manufactured according to the latest U.S. and European Safety Standards. Particular emphasis has been placed on the user's safety. Safety icons are explained below and safety instructions applicable to the products in this bulletin are grouped on

Page 3 . These instructions should be retained throughout the lifetime

of the compressor. You are strongly advised to follow these safety instructions.

Safety Icon Explanation

DANGER

CAUTION

WARNING

CAUTION

NOTICE

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE is used to address practices not related to personal injury.

CAUTION, without the safety alert symbol, is used to address practices not related to personal injury.

FLAMMABLE, Fire hazard! Sparking in a potentially explosive atmosphere! Explosion hazard!


2

AE10-1244 R19

Instructions Pertaining to Risk of Electrical Shock, Fire, or Injury to Persons

WARNING

WARNING

ELECTRICAL SHOCK HAZARD

•

Disconnect and lock out power before servicing.

•

Discharge all capacitors before servicing.

•

Use compressor with grounded system only.

•

Molded electrical plug must be used when required.

•

Refer to original equipment wiring diagrams.

•

Electrical connections must be made by qualified electrical personnel.

•

Failure to follow these warnings could result in serious personal injury.

PRESSURIZED SYSTEM HAZARD

•

System contains refrigerant and oil under pressure.

•

Remove refrigerant from both the high and low compressor side before removing compressor.

•

Never install a system and leave it unattended when it has no charge, a holding charge, or with the service valves closed without electrically locking out the system.

•

Use only approved refrigerants and refrigeration oils.

•

Personal safety equipment must be used.

•

Failure to follow these warnings could result in serious personal injury.

WARNING

CAUTION

BURN HAZARD

•

Do not touch the compressor until it has cooled down.

•

Ensure that materials and wiring do not touch high temperature areas of the compressor.

•

Use caution when brazing system components.

•


•

Failure to follow these warnings could result in serious personal injury or property damage.

COMPRESSOR HANDLING

•

Use the appropriate lifting devices to move compressors.

•


•

Failure to follow these warnings could result in personal injury or property damage.

Safety Statements

•

Refrigerant compressors must be employed only for their intended use.

•

Only qualified and authorized HVAC or refrigeration personnel are permitted to install commission and maintain this equipment.

•

Electrical connections must be made by qualified electrical personnel.

•

All valid standards and codes for installing, servicing, and maintaining electrical and refrigeration equipment must be observed.


3

AE10-1244 R19

1. Introduction

The contactor is one of the most important parts of any motor control circuit. It is vital that compressor applications for contactors are well understood and that the contactor is correctly sized for the load. An incorrectly sized contactor can destroy the best compressor.

As a general rule, contactors are designed for general purpose or definite purpose (specific use). Contactors can be further subdivided by listing categories for their use such as light or resistance (electric heating or lighting) loads and motor loads according to their severity.

NEMA Rated General Purpose Contactors

General purpose contactors are built for the severe industrial use. They are usually designed for a minimum life of over 1,000,000 electrical cycles on most types of motor loads. General purpose contactors rated in the

United States usually conform to NEMA (National

Electrical Manufacturers Association) ratings. NEMA has standardized on electrical sizes of motor controls to make the manufacturing of these devices more universal. A person who has one manufacturer’s NEMA size 1 contactor or motor starter can interchange his contactor with a NEMA size 1 from another vendor and be assured that the controller has been designed for the same broad spectrum of loads.

IEC Rated Contactors

There are many European test organizations for electrical controls. In order to obtain some degree of regulatory agency standardization, the International

Electrotechnical Committee (IEC) was formed. If the requirements of this authority are met, an electrical device will meet most European test standards.

IEC contactors are listed in four basic utilization categories; 'AC1' through 'AC4'. These categories describe the requirements for switching electrical loads from those with light inrush currents (resistive) to heavy duty motor applications.

An IEC designed contactor may be tested to any amperage or horsepower rating in any 'AC' category the manufacturer chooses.

IEC tests are not designed specifically for hermetic refrigeration motors as are the ARI (Air Conditioning and

Refrigeration Institute) tests. The ARI tests are, in part, used for Emerson Climate Technologies standards.

ARI test requirements for compressor contactors fall between IEC categories 'AC3' and 'AC4'. The 'AC3' rating is for starting of squirrel cage motors with locked


4 rotor currents equal to eight times rated load amps, with voltages to 600VAC, but stopping the motor only at

Rated Load Current, when the motor is up to speed.

This means there are no 'AC3' provisions for a contactor to open the compressor circuit under locked rotor conditions.

The 'AC4' rated contactor is life tested, making and breaking motor locked rotor circuits at eight times Rated

Load Amps with voltages to 600VAC. Because of the severity of this test, 'AC4' devices are not normally selected for refrigeration compressor loads.

At the end of each series of IEC contactor tests, the manufacturer typically publishes contactor life curves.

These curves allow the user to estimate the contactor’s mechanical life and electrical contact life, based on his application, rather than on the contactor nameplate rating. These curves help the user to make a determination of the life expectancy of his contactor based on his application.

Refrigeration compressor users commonly estimate IEC contactor life expectancy by using a combination of

'AC3' and 'AC4' ratings. This combination results in a shorter contactor life expectancy than the manufacturer’s 'AC3' published rating curve, but it is more representative of actual field conditions.

The user must use these curves carefully. IEC has different test requirements for rating (nameplate) verification than for contact life curves.

The user should also verify the type of short circuit protection required, since this can vary with the IEC manufacturer.

Definite Purpose Contactors

To meet the needs of the refrigeration and air conditioning industry, electrical equipment manufacturers have developed definite purpose contactors. These contactors have been designed specifically for loads where their life can be statistically predetermined by their application. Definite purpose contactors normally have a lower initial cost compared to NEMA and IEC devices.

Although their cost is less, definite purpose compressor contactors must still be designed to meet harsh conditions such as rapid cycling, sustained overloads, and low system voltages. They must have contacts large enough to dissipate the heat generated by the compressor load currents, and their contact materials must be selected to prevent welding under starting and other LRA (Locked Rotor Amperage) conditions.

AE10-1244 R19

Three Phase, Three Contact, Contactor

Requirement

Emerson contactor test requirements for both electrical application ratings and life expectancy, on three phase applications, are based on both making and breaking all three legs of a three-phase power supply. Similarly, recommendations for proper contactor sizing are based on this testing criteria, and the expectation that the contactor will be applied so as to break all three legs. the General-Purpose contactor. The amount of inrush current each DP contactor can carry is usually inversely proportional to the system voltage, while General

Purpose contactors keep the same inrush current ratings with system voltages as high as 600VAC.

FLA (Full Load Amps) is the term used by most industries to represent a maximum running current rating. Compressor manufacturers use RLA (Rated

Load Amps).

On small single-phase compressors, it has been common practice for many years to control motor operation by making and breaking only one leg of the two-leg power supply through a relay or pressure control contact.

Since the voltage involved is either 115V or 230V, and the current flow relatively small, the control relay or pressure switch contact points have satisfactory lives and field problems are minimal.

From time to time, for reasons of economy, consideration is given to applying three phase motors in a similar fashion using a contactor with only two contact points to break two legs of the three-phase power supply, while leaving the third leg connected to the supply. Using two leg control, particularly on systems having a supply voltage of 460 Volts or higher, results in a serious field safety hazard. If this two-contact approach is used, a danger will exist for service or operating personnel who fail to identify the unbroken power lead.

The inrush and applicable amperage rating for several

NEMA size comparable, DP contactors are shown in

Notice the much broader selections of Definite Purpose contactors that enable them to be more closely tailored to the load.

General

Caution! Most contactors have a resistive rating as well as a motor rating. The resistive rating is higher in amperage value than the motor rating amperage value.

This is because a resistive load is not called on to make and break motor currents. You must use motor load ratings for motor loads.

Purpose contactors and

Table 1.

Table 1 shows the differences between a current rated general-purpose contactor, and a definite purpose contactor. Notice that the general-purpose contactor has no voltage limitations on its inrush or LRA (locked rotor amp) rating, while the definite purpose goes by the

'six-fivefour' rule. This rule means the contactor’s LRA rating for a load is six times the RLA for 230V, it is five times for 460V, and four times for 575V.

There is also some evidence that unexplained air conditioning compressor motor failures on spring startup were caused by winter lightning strikes finding a path through the compressor motor contactor to the compressor by way of the unbroken line.

In the best interests of both Emerson and the user,

Emerson only lists those contactors that break all three legs of a three-phase circuit. For reasons of safety and reliability, Emerson does not recommend the two-leg break approach and would particularly discourage any two leg break for power supplies greater than 240VAC.

Amperage Ratings of NEMA and Definite Purpose

Contactors

General Purpose (NEMA) rated contactors are listed by sizes that are generally related to motor horsepower groupings. They are also rated in current, a more useful rating for compressors. DP (Definite Purpose) contactors, on the other hand, are usually listed for current alone, although occasionally a manufacturer qualifies his contactor for horsepower ratings. The

Definite Purpose contactor has less ability to handle inrush (Locked Rotor Amps or LRA) currents than does

5

Establishing the Compressor Contactor Load

U.L. (Underwriter’s Laboratories), tests compressor motors to verify their contactor requirements and overcurrent protection needs. Their tests are designed to be in conformance with Articles 430 and 440 of the

NEC (National Electric Code). These articles, in part, outline the requirements of contactors in compressor motor circuits.

In general, U.L. requires that a maximum continuous running current rating be established for each compressor for each application. By definition the maximum continuous current is that current drawn just prior to protector trip. In effect, this extreme continuous current value is then used to establish a running current value for the compressor called RLA (Rated Load

Amps). Article 440 of the NEC sets the Maximum

Continuous Current (MCC) rating of a compressor motor at 156% of its RLA value.


AE10-1244 R19

The National Electric Code definition of RLA is really applicable only if a compressor is installed in a complete system. If only this definition of the compressor load was used, and a compressor was to be rated only after it was installed in a condensing unit or a system, there would be a huge number of possible Rated Load Amp values.

C. On single contactor applications, the rating of the contactor for both full load amperes and locked rotor amperes (LRA) must be greater than the corresponding nameplate amperage rating of the compressor motor RLA plus the nameplate amperage ratings of any fans or other accessories also operated through the contactor.

As a practical matter, U.L. accepts the compressor

Rated Load Amps (RLA) value in lieu of testing each condensing unit with the wide variety of evaporators to which it might be applied.

D. For two contactor applications, each contactor must have a part winding locked rotor rating equal to or exceeding the half winding locked rotor rating of the compressor.

Since there are no test criteria to insure contactor operation at 156% of its RLA rating, there is no assurance that a contactor can stand prolonged exposure to an overload of the magnitude which would be incurred just prior to a protector trip.

Therefore, Emerson Climate Technologies has established a rated load current for all pilot circuit protected compressors at a more conservative value. Maximum Continuous Current for all

Copeland® compressors is 140% of Rated Load

Amps. It is a specification of the Emerson warranty that the contactor size must not be less than the

Emerson nameplate Rated Load Amp value.

Emerson Contactor Application Specifications

The following Emerson specifications are based on contactor ratings as listed with U.L.

Very often, since half winding LRA is larger than 50% of the compressor full winding LRA, and definite purpose contactors are sized in part by the locked rotor rating, the two contactors needed to meet the part-winding locked rotor requirement will have a combined full load rating in excess of the compressor nameplate full load rating.

Compact DP (Definite Purpose) Contact Resistance

Measurements and Continuity Verifications

Continuity of the main power poles can be directly attributed to the relationship between the coating buildup (oxidation/debris) on the contact surfaces, contact resistance, and shelf life. Therefore, measuring resistance across contacts with a Digital Multi-Meter

(DMM) will often give false readings (even open circuit) since there is not enough power to break through the surface coating. A. The contactor must meet the operational and test criteria in ARI (Air Conditioning and Refrigeration

Institute) Standard 780- 78, Standard for Definite

Purpose Contactors.

The following procedures are recommended for measuring contact resistance and for verifying continuity:

B. The contactor must be certified by the manufacturer to close at 80% of the lowest nameplate voltage at normal room temperatures. (166 Volts for contactors used on 208/230 Volt rated equipment.)

6

Resistance Measurement

In order to burn through the oxidation, it is recommended to test the contactors using 120 or 230

VAC at 10 Amps and calculate the contact resistance by


AE10-1244 R19

Volts / Amps. The reason to select 10A as the test load current is because for most contactors the rated operating current is usually 9A or greater. A test current of 10A can cover most contactor sizes. See measurement example below:

Although 10A is the recommended current, 5A is the minimum amperage that should be used for resistance calculation. Example of 5A load below:

Continuity Verification of 'New' Contacts

Even 'new' contacts can be affected by oxidation or contamination due to handling, environment, and time elapsed while being stocked after manufacture.

Therefore, continuity should be verified with a load. A relatively reliable and easy way to do this is with a light bulb. With a 120-vac source, a 100 watt or higher wattage light should be used to get a load current of near or over 1 amp. (100 w/ 120 vac = .83 amps.) Due to the relatively lower current than what’s used for resistance measurement, it may take several operations of opening and closing the contactor to break through the surface coating to get continuity and the light may 'flicker' while this is happening. (Note: There may be times when the low current is not enough to break through the coating).

See set-up example below:


7

Time Delay Relays

For part winding start applications, a time delay relay is required between contactors with a setting of 1 second plus or minus 1/10 second. The operation of a delay relay can be affected by low voltage.

In order to insure reliability, time delay relays listed as meeting Emerson specifications for nominal 208/230

Volt control systems must be guaranteed by the manufacturer to function properly at 170 Volts in a -40F ambient. See Table 2.

Approved Vendors of Time Delay Relays and

Contactors

The following time delay relays are listed by U.L., have met Emerson’s performance specifications, and to the best of Emerson’s knowledge have had a record of satisfactory field experience.

However, since Emerson does not continually monitor these devices and has no control over the materials or workmanship involved in manufacture, any defects must be the responsibility of the manufacturer.

The Emerson warranty does not extend to external electrical components furnished by others, and the failure of such components resulting in compressor failure, will void the compressor warranty. In addition,

Emerson reserves the right to issue credit to

Wholesalers for 4, 6, or 8 model semi-hermetic service compressors that are determined to have a singlephase motor burn caused by an Emerson contactor.

Single phase motor burns are not the result of manufacturing defects. See Table 3 for a description.

Four Steps to Select a Compressor Contactor

1. Determine the system voltage.

2. Determine if the compressor is to be started by Full

Voltage or Part-Winding (one contactor or two contactor start).

3. Obtain the compressor RLA and LRA values from

Table 4 for medium and low temperature applications or Table 5 for high temperature applications at the end of this bulletin, from the

AE10-1244 R19 compressor nameplate, or from Emerson Climate

Technologies specifications.

4. Check Emerson Approved Contactor Description.

Refer to Table 4 for contactor requirements for

Medium and Low temperature applications or Table

5 for high temperature applications.

If the compressor is not listed in a table, the contactor can always be sized for full voltage starting by selecting a contactor of the next amperage rating larger than the compressor’s rated load amperage (RLA), and then checking its LRA requirements against the rating of the chosen contactor.

TESTS FOR CONTACTOR QUALITY

Definite Purpose Contactor Requirements

Of the two general requirements all motor contactors must meet, dissipating the heat generated in the contacts while running, and cycling on and off under locked rotor conditions, the locked rotor cycling requirement is the hardest to understand. The compressor normally undergoes a locked rotor condition, at startup, for such a very short period of time that it is difficult to measure in the field. Yet, it is under this condition that the contactor 'points' are subjected to their maximum currents. If two contactors are used for starting the compressor ('parallel winding start' or 'part winding start'), the situation is further complicated by the fact that when only 1/2 of the motor winding is energized, the locked rotor current drawn is in excess of

1/2 of the full motor locked rotor current because of the inductive transformer effect of the non-energized winding.

Because definite purpose contactors are so critical to the successful operation of a compressor system,

Emerson Climate Technologies has worked with both

U.L. and ARI to develop contactor ratings and methods of test. There are very important tests that relate to the life of the contactor. Emerson subscribes to, and the contactor requirements follow, the harsher of the two tests recommended by the two organizations.

1. The Mechanical Life Test

ARI requires that the contactor shall have no mechanical malfunction after 500,000 cycles with no electrical load. This test checks the moving parts of a contactor and its coil.

2. Endurance Test Under Rated Load

ARI states that the contactor must withstand 200,000 starting cycles with no failure, when making its rated locked rotor current and breaking 125% of its rated load current.

8

3. Locked Rotor Endurance Test

For refrigeration and air conditioning applications with automatic reset pilot duty protection and for single contactor applications, ARI recommends a locked rotor test, based on the contactor making and breaking locked rotor amps, of 10,000 cycles.

4. Part Winding and Two Contactor Test

For part winding or two contactor applications, the

U.L. requirement is based on 30,000 cycles making full load and breaking locked rotor current. This is a very difficult test to pass. This test requirement can result in a substantial difference in the locked rotor rating of the contactor. Some contactors cannot successfully complete this test without lowering their inrush current ratings. These contactors are listed as derated to 80% of their single contactor inrush current rating for two contactor (which includes part winding) applications.

5. Low Voltage Pull In Test

The marginal nature of the power supply in some sections of the United States can result in dangerously low voltages during heavy demand periods.

On 208 Volt systems, which appear to be the most critical, the supply voltage at the utility may be as low as 191 Volts, and if the distribution and installation wiring is heavily loaded, it is possible that voltage at the compressor contactor coil may be well below 180 volts during the starting period when high inrush current is drawn.

Unless the contactor coil has adequate capability to pick-up (close its contacts), the low voltage condition can cause contact chatter, and potential contactor and compressor failure. In order to insure increased reliability, definite purpose contactors listed as meeting Emerson specifications with coils for nominal 208/230 Volt power must be guaranteed by the manufacturer to give a clean pick-up at 166 Volts at normal room temperature.

Any chattering or failure of a contactor to function properly under low voltage conditions should be investigated. If the voltage supplying the contactor is too low, or the voltage 'drops' to an unacceptable level when the contactor is energized, the system voltage should be corrected.

The Contactor and Motor Overload Protection

Contactors play a role in any compressor overload protection scheme, but they are particularly important when they are part of pilot operated protection systems.

When the compressor pilot or control circuit contains the


AE10-1244 R19 contact of a modern electronic overload protector, the protector, in conjunction with a properly operating contactor of the correct size, provides an excellent motor safeguard. The protector accurately senses a change in motor temperature caused by a mechanical or an electrical overcurrent problem and signals the contactor coil to remove the compressor from the power supply. Despite this protection, motor burnouts attributed to power supply problems continue to be a source of motor failure. Improperly sized contactors can contribute to this problem, even if it does not originate with them.

Power Supply Problems

An all too common power supply problem is the loss of one phase in the lines from the secondary of the power supply transformer to the compressor. If the motor is stopped this 'single phasing' will cause the compressor to draw heavy rotor currents but be unable to start.

If the compressor is running at the time of the fault, it will continue to run but with a large current overload. The motor windings will of course rapidly overheat, and the motor protector will signal the contactor coil to remove the compressor from the line. But, as soon as the compressor motor windings cool down to normal operating temperatures, the protector will signal the compressor to restart, but the motor is unable to restart generating locked rotor current which will cause the protector to trip again. No compressor motor is designed to indefinitely cycle on a single-phase condition.

During the sustained locked rotor condition, the motor not only overheats rapidly but the motor windings undergo a continuing mechanical stress that is far beyond their starting and running design. If the problem exists over a long period of time the motor life will be shortened, and the protector will fail. The protector will either fail open, preventing a compressor start, or it will fail closed. If the protector fails closed, the motor will lose all protection and will burn out during the next single-phase cycle.

Because of unbalanced loading on all three voltage lines, single phasing can also produce the side effect of erratic voltages in the control circuit. These very rapid fluctuations can cause contactor chatter. The chattering contactor continually connects the motor to the line, then disconnects it. The motor is subjected to heavy magnetic torqueing of its stator windings as well as heavy inrush currents as it is needlessly cycled on and off. This condition is one of the most destructive to a motor. Motor windings move and rub together each time the contactor closes, and in a short time under these rapid cycling conditions winding insulation fails, windings are shorted together, and the destruction

9 continues until the motor fails. This is a source of motor failures against which the compressor overload system was not designed to protect. In addition to the motor stress, the chattering contactor is taking a beating. No contactor can last long under this condition. After a time, even the best contactor’s coil will fail. If the contactor’s coil fails, it can seize the contactor armature in such a way that all contacts are not closed or not opened evenly, with single phasing as a result.

If the contactor has been undersized, its contacts will be unable to withstand the arcing and high temperatures generated by the extreme cycling or 'machine-gun' effect of an erratic control circuit voltage, and they will very likely weld together or become dislodged from their contact carrier. Welded contacts will create a permanent single-phase condition that makes the overload protector continuously cycle on and off . Dislodged contacts force the copper contact carriers of the contactor to try to make and break heavy electrical currents and they will also weld. When welding occurs, the contactor will perpetuate the single-phase condition through its welded or missing contacts.

After a single-phase condition has been corrected, the contactors and relays of the control circuit should be inspected for damage if they could have been adversely affected. If a compressor contactor fails with its contacts or contact carrier welded, the motor can also fail at a later time even though the power supply problem has been corrected, and in addition a hazardous condition has been created since the system safety controls cannot remove the compressor contactor from the line in case of an overload

Primary Phase Failure

The effect of an open phase in the primary circuit of a power transformer depends on the type of transformer connection. Where both primary and secondary windings are connected in the same fashion, wye-wye or delta-delta, a fault in one phase of the primary will result in a low current in one phase of the secondary, and high currents in two phases, with results similar to the simple load circuit single phase condition.

But in wye-delta or delta-wye connected power transformers, an open circuit or single phase on the primary side of the transformer will result in a high current in only one phase of the motor with low currents in the other two phases.

Under locked rotor conditions, the high phase will draw an amperage slightly less than nameplate locked rotor current, while the other two legs will each draw approximately 50% of that amount. Under operating conditions, the current in the high phase could be in excess of 200% of full load amperes, depending on


AE10-1244 R19 load, while the current in the other two legs will be slightly greater than normal full load amperes.

Unbalanced Supply Voltage

A properly wound three phase motor connected to a supply source in which the voltages in each phase are balanced at all times will have nearly identical currents in all three phases.

The differences in motor windings in modern motors are normally so small that the effect on amperage draw is negligible. Under ideal conditions, if the phase voltages were always equal, a single motor protector in just one line would adequately protect the motor against damage due to an excessive running overcurrent draw.

As a practical matter, balanced supply voltages are not always maintained, so the three-line currents will not always be equal.

The effect of unbalanced voltages is equivalent to the introduction of a 'negative sequence voltage.' This exerts a force opposite to that created with balanced voltages.

These opposing forces will produce currents in the windings greatly in excess of those present under balanced voltage conditions.

Voltage unbalance is calculated as follows:

% VU (Voltage Unbalance) = (100 x Maximum

Voltage Deviation from the Average Voltage of the three phases)/ Average Voltage of the three phases

As an example, a nominal 230V 3PH power source, produces the following voltages at the terminals of a three-phase compressor:

L1-L2 = 220V, L1-L3 = 230V, L2-L3 = 216V

Using the percentage voltage unbalance formula, we get the following:

Average voltage = (220V + 230V + 216V)/3 = 222V

Maximum Deviation = 230 - 222 = 8

% voltage unbalance = (100 x 8)/222 = 3.6 %

As a result of the voltage unbalance, the locked rotor currents will be unbalanced to the same degree.

However, the unbalance in load currents at normal operating speed may be from 4 to 10 times the voltage unbalance, depending on the load. With the 3.6% voltage unbalance in the previous example, load current in one phase might be as much as 30% greater than average line current being drawn.

The NEMA Motors and Generators Standards

Publication states that the percentage increase in temperature rise in a phase winding resulting from voltage unbalance will be approximately two times the square of the voltage unbalance.

% Increase in Temperature = 2 x Voltage

Unbalance²

Using the voltage unbalance from the previous example, the % increase in temperature can be estimated as follows:

% Increase in Temperature = 2 x (3.6 x 3.6) = 25.9%

As a result of this condition, it is possible that one phase winding in a motor may be overheated while the other two have temperatures within normal limits.

A common source of unbalanced voltage on a threephase circuit is the presence of a single-phase load between two of the three phases.

A large unbalanced single-phase load, for example a lighting circuit, can easily cause sufficient variations in


10

AE10-1244 R19 motor currents to endanger the motor. If at all possible, this condition should be corrected by shifting the singlephase load as necessary. Supply voltages should be evenly balanced as closely as can be read on a commercial voltmeter.

A national survey by U.L. indicated that 36 out of 83 utilities surveyed, or 43%, allowed voltage unbalance in excess of 3%, and 30% allowed voltages unbalance of

5% or higher.

In the event of a supply voltage unbalance, the power company should be notified of such unbalance to determine if the situation can be corrected.

Solid state protection provides excellent temperature characteristics and will protect the motor even with unbalanced current. However, consistently high current in one or two phases can materially shorten the motor life and may be the source of failure.

It is important that the system operator be made aware that to prevent unnecessary failures additional circuit current and voltage devices may be required especially if the power supply has had a problem history. The operator should also understand that any replacement under warranty of a compressor failing due to a motor burn is contingent on the proper application of a contactor meeting Emerson specifications. It is vital to the compressor that contactors are properly applied.


11

912-2040-01

912-2040-02

912-3025-00

912-3025-01

912-3025-02

912-3025-03

912-3030-00

912-3030-01

912-3030-02

912-3030-03

912-3040-00

912-3040-01

912-3040-02

912-3040-03

912-3050-00

912-3050-01

912-3050-02

912-3050-03

912-1040-00

912-1930-00

912-1930-01

912-1940-00

912-1940-02

912-2020-00

912-2020-01

912-2020-02

912-2025-00

912-2025-01

912-2025-02

912-2030-00

912-2030-01

912-2030-02

912-2040-00

Table 3 – Emerson Approved Contactors

Part Number Description

912-1025-02 1 Pole, 25A Ind. 208/240v

912-1030-00 1 Pole, 30A Ind. 24v

1 Pole, 40A Ind. 24v

1 Pole, 30A Ind. 24v w/ Shunt



1 Pole, 40A Ind. 208/240v w/ Shunt



2 Pole, 20A Ind. 208/240v



2 Pole, 25A Ind. 208/240v



2 Pole, 30A Ind. 208/240v



2 Pole, 40A Ind. 208/240v



3 Pole, 25A Ind. 208/240v




3 Pole, 30A Ind. 208/240v




3 Pole, 40A Ind. 208/240v




3 Pole, 50A Ind. 208/240v



12

AE10-1244 R19


912-3060-00

912-3060-01

912-3060-02

912-3060-03

912-3075-00

912-3075-01

912-3075-02

912-3075-03

912-3090-04

912-3090-05

912-3090-06

912-3090-07

912-3120-00

912-3120-01

912-3120-02

912-3120-03



3 Pole, 60A Ind. 208/240v




3 Pole, 75A Ind. 208/240v




3 Pole, 90A Ind. 208/240v




3 Pole, 120A Ind. 208/240v


912-3200-00

912-3200-01

912-3200-02

912-3300-01



3 Pole, 200A Ind. 208/240v


Auxiliary Contact Kits (Side Mounted)

912-0001-10 1 NO - For 15-75A

912-0001-11 1 NC - For 15-75A

912-0001-12

912-0001-13

912-0001-14

912-0001-39

912-0001-40

912-0001-41

912-0001-19

912-0001-20

912-0001-21

912-0001-22

1 NO/1 NC - For 15-75A

2 NO - For 15-75A

2 NC - For 15-75A

1 NO - For 90A

1 NC - For 90A

1 NO/1 NC - For 90A

1 NO - For 120-360A

1 NC - For 120-360A

1 NO/1 NC - For 120-360A

Mech. Interlock - For 15-75A

13

AE10-1244 R19

AE10-1244 R19

Discus

Prior to 2006

Table 4 - Contactor Specifications & Selection Guide - Low and Medium Temp

230 v olt - 1 contactor 230 v olt - 2 contactors 460 v olt - 1 contactor 460 v olt - 2 contactors

Discus II

2006-2012

Discus III

2012-Present LRA RLA

Contactor

Amp LRA RLA

Contactor

Amp LRA RLA

Contactor

Amp LRA RLA

Contactor

Amp

Rating

4DA3A100E-TSK 4DA3R12ME-TSK

4DA3A101E-TSK 4DA3F47KE-TSK

4DE3A100E-TSK 4DE3F47KE-TSK


N/A

N/A

N/A

N/A

240 42

220 45.2

220 42

308 82.9

Rating

50

50

50

90

140 42

134 45.2

140 45.2

188 82.9

Rating

2-25

2-25

2-25

2-50

120 21

110 22.6

120 22.6

154 41.4

Rating

25

25

25

50

104 33.6

2-25 4DA3A2000-FSD 4DA3R18M0-FSD

4DA3A2000-TSK 4DA3R18M0-TSK

4DA4A2000-TSK N/A

4DE3A200E-TSK 4DE3R18ME-TSK

N/A

N/A

N/A

N/A

308 66

308 66

308 82.9

4DE3A2000-FSD 4DE3R18M0-FSD

4DE3A2000-TSK 4DE3R18M0-TSK

N/A N/A

N/A

N/A 308 66

4DBNF54KE-TSK 220 51.3

4DB3A2200-TSK 4DB3R20M0-TSK 4DBNR20M0-TSK 374 65.6

N/A N/A 4DCNF54KE-TSK 220 51.3

4DC3A2200-TSK 4DC3R20M0-TSK 4DCNR20M0-TSK 374 65.6

4DH3A150E-TSK 4DH3R16ME-TSK 4DHNR16ME-TSK 278 58

4DH3A250E-TSK 4DH3R22ME-TSK 4DHNR22ME-TSK 428 107.2

4DH3A2500-TSK 4DH3R22M0-TSK 4DHNR22M0-TSK 428 82.2

4DJ3A3000-TSK 4DJ3R28M0-TSK 4DJNR28M0-TSK 470 94

4DK3A150E-TSK 4DK3R16ME-TSK 4DKNR16ME-TSK 278 58

4DK3A250E-TSK 4DK3R22ME-TSK 4DKNR22ME-TSK 428 82.1

4DK3A2500-FSD 4DK3R22M0-FSD 4DKNR22M0-FSD

4DK3A2500-TSK 4DK3R22M0-TSK 4DKNR22M0-TSK 428 82.2

4DL3A150E-TSK 4DL3F63KE-TSK 4DHNF63KE-TSK 278 52.6

4DN3A101E-TSK 4DN3F47KE-TSK N/A 220 45.2

4DP3A150E-TSK 4DP3F63KE-TSK 4DKNF63KE-TSK 278 52.6

4DP8A150E-TSK 4DP8F63KE-TSK N/A 278 52.6

4DR3A200E-TSK 4DR3R19ME-TSK 4DRNR19ME-TSK 346 66

4DR3A300E-TSK 4DR3R28ME-TSK 4DRNR28ME-TSK 470 114.3

4DR3A3000-FSD 4DR3R28M0-FSD 4DRNR28M0-FSD

4DR3A3000-TSK 4DR3R28M0-TSK 4DRNR28M0-TSK 470 94

4DS3A220E-TSK 4DS3F76KE-TSK 4DRNF76KE-TSK 374 66

4DT3A220E-FSD 4DT3F76KE-FSD 4DJNF76KE-FSD

4DT3A220E-TSK 4DT3F76KE-TSK 4DJNF76KE-TSK 374 66

4RA3A100A-TSK N/A N/A 240 54.8

4RA3A200A-TSK

4RA4A200A-TSK

N/A

N/A

N/A

N/A

308 71.4

308 71.4

4RE2A200A-FSD

4RE2A200A-TSK

N/A

N/A

N/A

N/A 308 71.4

60

75

60

120

75

60

75

90

120

60

90

60

60

75

120

90

60

50

75

75

90

120

75

75

60

75

75

75

188 66

188 66

188 82.9

188 66

134 51.3

222 65.6

134 51.3

222 65.6

170 58

250 107.2

250 82.2

292 94

170 58

250 82.1

250 82.2

170 26.3

134 45.2

170 52.6

170 52.6

208 66

292 114.3

292 94

222 66

222 66

140 54.8

188 71.4

188 71.4

188 71.4

2-40

2-40

2-50

2-40

2-30

2-40

2-30

2-40

2-30

2-60

2-50

2-50

2-30

2-50

2-50

2-30

2-25

2-30

2-30

2-40

2-60

2-50

2-40

2-40

2-30

2-40

2-40

2-40

206 40.6

214 41.1

139 26.3

110 22.6

139 26.3

139 26.3

173 33

235 57.1

235 51.9

235 47

187 33

180 33.9

187 33

120 27.4

154 35.7

154 35.7

135 32.3

154 35.7

173 33.6

154 33

154 33

154 41.4

173 33.6

154 33

110 25.6

187 32.8

110 25.6

187 32.8

139 29

214 53.6

214 41.1

235 47

139 29

214 53.6

40

30

40

40

60

50

40

40

40

40

30

30

40

60

50

50

30

25

50

50

30

60

30

40

30

60

40

40

30

40

40

40

40

50

104 33.6

2-25

132 40.6

2-25

141 51.9

2-25

108 33.9

2-25

82 32.3

2-25

14


AE10-1244 R19

Discus

Table 4 - Contactor Specifications & Selection Guide - Low and Medium Temp (Continued)


Discus II Discus III Contactor Contactor Contactor Contactor

Prior to 2006 2006-2012 2012-Present LRA RLA Amp LRA RLA Amp LRA RLA Amp LRA RLA Amp

4RH1A150A-TSK N/A N/A 278 63

Rating

75 170 63

Rating

2-40 139 31.5

Rating

40

Rating

4RJ1A300A-FSD N/A N/A 200 59 60 121 59 2-30

100 45 2-25 4RK2A250A-FSD

4RK2A250A-TSK

4RL1A150A-TSK

4RL2A150A-TSK

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

428 88.5

278 62.6

278 62.6

4RR1A300A-FSD

4RR1A300A-TSK

4RR2A300A-TSK

N/A

N/A

N/A

N/A

N/A

N/A

470 102

470 102

6DB3A3000-TSK 6DB3R32M0-TSK 6DBNR32M0-TSK 565 105

6DC3A270E-TSK 6DC3F93KE-TSK 6DKNF93KE-TSK 450 80.8

6DD3A270E-TSK 6DD3F93KE-TSK 6DPNF93KE-TSK 450 80.8

6DE3A300E-TSK 6DE3F11ME-TSK 6DRNF11ME-TSK 470 95.6

6DF3A300E-TSK 6DF3F11ME-TSK 6DSNF11ME-TSK 470 95.6

6DG3A350E-TSN 6DG3R37ME-TSN 6DGNR37ME-TSN 594 168.6

6DG3A3500-FSD 6DG3R37M0-FSD N/A

6DG3A3500-FSD 6DG3R37M0-TSN N/A 594 125



6DH3A3500-FSD 6DH3R35M0-FSD 6DHNR35M0-FSD


6DJ3A300E-TSK 6DJ3R28ME-TSK 6DJNR28ME-TSK 470 100

6DJ3A400E-TSN 6DJ3R40ME-TSN 6DJNR40ME-TSN 594 158.6

6DJ3A4000-TSN 6DJ3R40M0-TSN 6DJNR40M0-TSN 594 141.4





6DL3A270E-TSK 6DL3F93KE-TSK 6DHNF93KE-TSK 450 80.8

6DM3A3500-FSD 6DM3R37M0-FSD N/A

6DM3A3500-TSN 6DM3R37M0-TSN N/A 594 125

6DN3A350E-TSN 6DN3R37ME-TSN 6DNNR37ME-TSN 594 168.6

6DN3A3500-FSD 6DN3R37M0-FSD N/A

6DN3A3500-TSN 6DN3R37M0-TSN 6DNNR37M0-TSN 594 125

6DP3A200E-TSK 6DP3R23ME-TSK 6DPNR23ME-TSK 346 75

6DP3A350E-FSD 6DP3R35ME-FSD 6DPNR35ME-FSD

6DP3A350E-TSK 6DP3R35ME-TSK 6DPNR35ME-TSK 565 147.1

6DP3A3500-FSD 6DP3R35M0-FSD 6DPNR35M0-FSD

6DP3A3500-TSK 6DP3R35M0-TSK 6DPNR35M0-TSK 565 125.1

120

120

120

90

90

120

120

200

2

75

200

200

120

200

200

75

200

90

75

75

200

90

200

200

200

75

200

200

250 88.5

170 62.6

170 62.6

292 102

292 102

340 105

263 80.8

263 80.8

292 95.6

292 95.6

340 168.6

340 125

208 75

340 147.1

340 125.2

292 100

340 158.6

340 141.4

208 75

340 147.1

340 125.1

263 80.8

340 125

340 168.6

340 125

208 75

340 147.1

340 125.1

2-50

2-40

2-40

2-75

2-50

2-90

2-75

2-40

2-75

2-60

2-60

2-60

2-50

2-50

2-50

2-50

2-90

2-75

2-40

2-75

2-75

2-50

2-75

2-90

2-75

2-40

2-75

2-75

283 73.6

260 62.6

283 62.6

235 50

297 79.3

297 70.7

173 37.5

283 73.6

260 62.6

283 62.6

225 40.4

315 66

297 62.5

297 84.3

315 66

297 62.5

165 45

214 44.3

139 31.3

139 31.3

200 59

235 51

235 51

283 52.5

225 40.4

225 40.4

235 47.8

235 47.8

297 84.3

315 66

297 62.5

173 37.5

173 37.5

260 79.3

283 73.6

260 62.6

283 62.6

75

90

75

75

75

75

50

75

90

75

40

75

75

75

75

50

40

90

75

75

75

90

75

75

40

50

50

50

50

60

60

60

60

50

50

40

40

121 59

195 66

156 62.6

2-40

156 62.6

2-40

195 66

195 66

2-30

2-40

2-40

2-40

156 79.3

2-40

156 62.6

2-40

15


AE10-1244 R19

Discus

Prior to 2006



Discus II

2006-2012

Discus III



6DR3A400E-FSD 6DR3R40ME-FSD 6DRNR40ME-FSD

6DR3A400E-TSN 6DR3R40ME-TSN 6DRNR40ME-TSN 594 158.6


6DR3A4000-TSN 6DR3R40M0-TSN 6DRNR40M0-TSN 594 141.4

6DS3A300E-TSK 6DS3R28ME-TSK 6DSNR28ME-TSK 470 100

6DS3A400E-TSN 6DS3R40ME-TSN 6DSNR40ME-TSN 594 158.6

6DS3A4000-FSD 6DS3R40M0-FSD 6DSNR40M0-FSD

6DS3A4000-TSN 6DS3R40M0-TSN 6DSNR40M0-TSN 594 141.4

6DT3A300E-FSD 6DL3F11ME-FSD 6DJNF11ME-FSD

6RB2A100A-TSK

6RB2A200A-TSK

6RE2A200A-TSK

6RH1A200A-TSK

6RL1A250A-TSK

6RN2A300A-TSK

6RP2A200A-TSK

6RP2A350A-FSD

6RP2A350A-TSK

6RS2A400A-FSD

6RS2A400A-TSN

6RT1A300A-TSK

6TM1A2000-TSK

8DP1R56M0-FSD

8DP1R56M0-TSK

6DT3A300E-TSK 6DL3F11ME-TSK 6DJNF11ME-TSK 470 95.6

N/A N/A 6DUNF13ME-AWD

N/A

N/A

N/A

N/A

6DUNR49ME-AWD

6DUXF13ME-AWD

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

6DUXR49ME-AWD

6DVNF13ME-AWD

6DVNR49ME-AWD

6DVXF13ME-AWD

N/A N/A

6DW3A3000-FSD 6DW3R32M0-FSD

6DVXR49ME-AWD

N/A

6DW3A3000-TSK 6DW3R32M0-TSK 6DWNR32M0-TSK 565 105

6DY3A3000-FSD 6DY3R32M0-FSD 6DYNR32M0-FSD

6DY3A3000-TSK 6DY3R32M0-TSK 6DYNR32M0-TSK 565 105

6RA4A100A-TSK N/A N/A 240 43.6

6RA4A200A-TSK N/A N/A 308 67.3

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

240 43

308 61.4

308 67.3

308 72

428 96.9

470 105

308 72

565

594

470

135

142

111

308 65.7

1070 180

Contactor

Amp

Rating

120

200

200

120

200

200

120

120

120

50

75

120

120

75

50

75

75

75

200

200

120

75

200

LRA RLA

292 100

340 158.6

340 141.4

292 100

340 158.6

340 141.4

292 95.6

340 105

340 105

140 43.6

188 67.3

140 43

188 61.4

188 67.3

188 72

250 96.9

292 105

188 72

340 135

340 142

292 111

188 65.7

654 180

60

25

40

90

50

60

50

90

75

90

75

50

75

90

75

75

75

50

75

75

50

90

Contactor

Amp

Rating

50

75

90

40

120

120

75

75

75

60

50

60

40

75

25

40

40

40

Contactor

Amp

Rating

2-50

2-90

2-75

2-50

2-90

2-75

LRA RLA

2-50

2-60

2-60

2-25

2-40

2-25

2-40

2-40

2-40

2-50

2-60

2-40

120 22

154 30.7

154 33.7

154 36

214 48.5

235 52.5

154 36

225 67.5

2-75

2-75

2-60

2-40

283 67.5

239 64.3

297 71

235 55.5

154 32.9

510 91

2-120 535 90

235 47.8

367 67.9

482 83.6

367 67.9

482 83.6

367 67.9

482 83.6

367 67.9

482 83.6

260 50

283 52.5

260 50

283 52.5

120 21.8

154 33.7

235 50

315 70

297 79.3

315 70

297 70.7

235 50

297 79.3

315 70

297 70.7

235 47.4

LRA RLA

195 70

195 70

195 70

Contactor

Amp

Rating

2-40

2-40

2-40

141 47.4

2-25

156 50

156 50

150 67.5

2-40

147 64.3

2-40

330 91

2-25

2-25

2-60

8DS1R67M0-FSD N/A N/A 510 97 120 330 97 2-60

8DS1R67M0-TSK N/A N/A 1070 224 300 654 224 2-120 535 112 120

*Please reference OPI for additional refrigerant and application information.

**Models with a "D" or "X" in the fourth digit of the compressor nomenclature are digital. Please reference the baseline model, which would have an "N" or "3" in the fourth digital of the nomenclature, for contactor specification and selection.

16


AE10-1244 R19


RLA - Rated load amps.

Note! RLA value is highest rated value for each compressor. To obtain the specific RLA based on refrigerant & application check the Online Product Information or Emerson Product Selection Software.

LRA - The current drawn by a motor which is “locked” and cannot rotate.


17

AE10-1244 R19

Discus

Prior to 2006

Table 5 - Contactor Specifications & Selection Guide - High Temp

230 v olt - 1 contactor 230 v olt - 2 contactors 460 v olt - 1 contactor

Discus II

2006-2012



Discus III

2012-Present

N/A

N/A

LRA RLA

240 42

308 82.9

Contactor

Amp

Rating

50

90

LRA RLA

140 42

188 82.9

Contactor

Amp

Rating

2-25

2-50

LRA RLA

120 21

154 41.1

Contactor

Amp

Rating

25

50

4DA3A2000-FSD 4DA3R18M0-FSD

4DA3A2000-TSK 4DA3R18M0-TSK

4DA4A2000-TSK N/A

4DE3A200E-TSK 4DE3R18ME-TSK

N/A

N/A

N/A

N/A

308 66.6

308 66.6

308 82.9

4DE3A2000-FSD 4DE3R18M0-FSD

4DE3A2000-TSK 4DE3R18M0-TSK

N/A

N/A 308 66.6

4DB3A2200-TSK 4DB3R20M0-TSK 4DBNR20M0-TSK 374 65.6

4DC3A2200-TSK 4DC3R20M0-TSK 4DCNR20M0-TSK 374 65.6




4DJ3A3000-TSK 4DJ3R28M0-TSK 4DJNR28M0-TSK 470 94








4DR3A3000-TSK 4DR3R28M0-TSK 4DRNR28M0-TSK 470 94

4RA3A100A-TSK N/A N/A 240 54.9

4RA3A200A-TSK

4RA4A200A-TSK

4RE2A200A-FSD

4RE2A200A-TSK

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

308 71.4

308 71.4

308 71.4

120

90

120

60

75

75

75

60

90

90

75

120

120

60

75

75

75

75

90

75

188 66.6

188 66.6

188 82.9

188 66.6

222 65.6

222 65.6

170 57.9

250 105.7

250 82.1

292 94

170 57.9

250 82.1

250 82.1

208 66

292 110

292 94

140 54.9

188 71.4

188 71.4

188 71.4

2-40

2-40

2-50

2-60

2-50

2-50

2-30

2-40

2-40

2-40

2-30

2-50

2-50

2-40

2-60

2-50

2-30

2-40

2-40

2-40

173 33.6

154 33.3

154 33.3

154 41.4

173 33.6

154 33.3

187 32.8

187 32.8

139 28.9

214 52.9

214 41.1

235 47

139 28.9

214 52.9

206 40.6

214 41.1

173 33

235 55

235 45

235 47

120 27.4

154 35.7

154 35.7

135 32.4

154 35.7

60

50

50

40

60

50

50

30

40

40

40

40

30

40

40

40

50

40

40

40

40

60

50

50

30

460 v olt - 2 contactors

LRA RLA

Contactor

Amp

Rating

104 33.6

2-25

104 33.6

2-25

132 40.6

2-25

141 45 2-25

82 32.4

2-25


18

AE10-1244 R19

Discus

Prior to 2006

Table 5 - Contactor Specifications & Selection Guide - High Temp (continued)


Discus II

2006-2012

N/A

N/A

Discus III

2012-Present

N/A

N/A

LRA RLA

278 63

Contactor

Amp

Rating

75

LRA RLA

170 63

Contactor

Amp

Rating

2-40

LRA RLA

139 31.5

200 59

Contactor

Amp

Rating

40

60

LRA RLA

121 59

Contactor

Amp

Rating

2-30

4RH1A150A-TSK

4RJ1A300A-FSD

4RK2A250A-FSD

4RK2A250A-TSK

4RR1A300A-FSD

4RR1A300A-TSK

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

428 88.6

470 101.4

4RR2A300A-TSK N/A N/A 470 101.4

6DB3A3000-TSK 6DB3R32M0-TSK 6DBNR32M0-TSK 565 105

6DG3A350E-TSN 6DG3R37ME-TSN 6DGNR37ME-TSN 594 168

6DG3A3500-FSD 6DG3R37M0-FSD N/A

90

120

120

120

200

250 88.6

292 101.4

292 101.4

340 105

340 168

2-50

2-60

2-60

2-60

2-90

165 45

214 44.3

200 56

235 50.7

235 50.7

283 52.5

297 84.3

315 66

60

60

90

75

50

50

60

60

100 45

121 56

195 66

2-25

2-30

2-40

200

75

200

340 125

208 75

340 125.1

2-75

2-40

2-75

6DG3A3500-FSD 6DG3R37M0-TSN N/A 594 125



6DH3A3500-FSD 6DH3R35M0-FSD 6DHNR35M0-FSD


6DJ3A300E-TSK 6DJ3R28ME-TSK 6DJNR28ME-TSK 470 100

6DJ3A4000-TSN 6DJ3R40M0-TSN 6DJNR40M0-TSN 594 141.4

6DJ3A400E-TSN 6DJ3R40ME-TSN 6DJNR40ME-TSN 594 158.6





6DM3A3500-FSD 6DM3R37M0-FSD N/A

6DM3A3500-TSN 6DM3R37M0-TSN

6DN3A3500-FSD 6DN3R37M0-FSD

N/A

N/A

594 125

6DN3A3500-TSN 6DN3R37M0-TSN 6DNNR37M0-TSN 594 125

6DN3A350E-TSN 6DN3R37ME-TSN 6DNNR37ME-TSN 594 168.6

6DP3A200E-TSK 6DP3R23ME-TSK 6DPNR23ME-TSK 346 75

6DP3A350E-FSD 6DP3R35ME-FSD 6DPNR35ME-FSD

6DP3A350E-TSK 6DP3R35ME-TSK 6DPNR35ME-TSK 565 147.1

6DP3A3500-FSD 6DP3R35M0-FSD 6DPNR35M0-FSD

6DP3A3500-TSK 6DP3R35M0-TSK 6DPNR35M0-TSK 565 125

200

120

200

200

75

200

200

200

200

200

75

200

200

340 141.1

292 100

340 141.4

340 158.6

208 75

340 147.1

340 125.1

340 125

340 125

340 168.6

208 75

340 147.1

340 125

2-75

2-50

2-75

2-90

2-40

2-75

2-75

2-75

2-75

2-90

2-40

2-75

2-75

297 62.5

173 37.5

283 73.6

260 62.6

283 70.7

235 50

297 70.7

297 79.3

173 37.5

283 73.6

260 62.6

283 70.7

315 66

297 62.5

315 66

297 62.5

297 84.3

173 37.5

260 79.3

283 73.6

260 62.6

283 62.6

75

75

75

75

90

40

75

75

75

75

50

75

75

40

75

75

75

75

75

90

40

90

156 62.6

2-40

156 62.6

2-40

195 66

195 66

2-40

2-40

156 79.3

2-40

156 62.6

2-40


19

AE10-1244 R19

Discus

Prior to 2006

Table 5 - Contactor Specifications & Selection Guide - High Temp (continued)


Discus II

2006-2012

Discus III



Contactor

Amp

Rating

120

LRA RLA

292 100

Contactor

Amp

Rating

2-50

LRA RLA

235 50

Contactor

Amp

Rating

50

LRA RLA

Contactor

Amp

Rating

195 86.4

2-50

195 70 2-40

6DR3A400E-FSD 6DR3R40ME-FSD 6DRNR40ME-FSD


6DR3A4000-TSN 6DR3R40M0-TSN 6DRNR40M0-TSN 594 141.4

6DR3A400E-TSN 6DR3R40ME-TSN 6DRNR40ME-TSN 594 158.6

6DS3A300E-TSK 6DS3R28ME-TSK 6DSNR28ME-TSK 470 100

6DS3A4000-FSD 6DS3R40M0-FSD 6DSNR40M0-FSD

6DS3A4000-TSN 6DS3R40M0-TSN 6DSNR40M0-TSN 594 141.4

6DS3A400E-TSN 6DS3R40ME-TSN 6DSNR40ME-TSN 594 158.6

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

6DUNR49ME-AWD

6DUXR49ME-AWD

6DVNR49ME-AWD

6DVXR49ME-AWD

6DW3A3000-FSD 6DW3R32M0-FSD N/A

6DW3A3000-TSK 6DW3R32M0-TSK 6DWNR32M0-TSK 565 105

6DY3A3000-FSD 6DY3R32M0-FSD 6DYNR32M0-FSD

6DY3A3000-TSK 6DY3R32M0-TSK 6DYNR32M0-TSK 565 105

6RA4A200A-TSK

6RE2A200A-TSK

6RH1A200A-TSK

6RP2A200A-TSK

6RP2A350A-FSD

6RP2A350A-TSK

6RS2A400A-FSD

6RS2A400A-TSN

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

308 65.4

308 65..4

308 72

308 72

565 134

594 141.4

8DP1R56M0-FSD

8DP1R56M0-FSD

8DS1R67M0-FSD

8DS1R67M0-TSK

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

1070 180

1070 224.3

120

75

75

75

75

200

200

120

200

200

120

200

200

200

300

340 141.4

340 158.6

292 100

340 141.4

340 158.6

2-75

2-90

2-50

2-75

2-90

340

188

188

188

105

340 105

65.4

188 65..4

72

72

2-60

2-60

2-40

2-40

2-40

2-40

482 97.9

482 97.9

482 97.9

482 97.9

260 50

283 52.5

260 50

283 52.5

154 32.7

154 32.5

154 36

154 36

340 134

340 141.4

2-75

225 67.5

283 67.1

239 62

297 70.7

2-75

510 90.7

2-120 535 90 654 180

510 90.7

654 224.3

2-120 535 112

315 86.4

315 70

297 70.7

297 79.3

235 50

315 70

297 70.7

297 79.3

75

75

75

75

40

40

40

40

120

120

120

120

50

60

50

60

120

120

120

120

60

75

75

90

90

75

75

90

195 70

156 50

156 50

147 62

2-40

2-25

2-25

150 67.5

2-40

2-40

330 90.7

2-60

330 90.7

2-60


20

AE10-1244 R19

Table 6 - Contactor Specifications & Selection Guide for 3D Compressors – Low and Medium Temp


Discus

Prior to 2006

Discus II

2006-2012

Discus III


3DA3-0500-TFC 3DA3A0500-TFC 3DA*F18K0-TFC 115 18.6

Contactor

Amp

Rating

25

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

58 11 25 3DA3-0500-TFD 3DA3A0500-TFD 3DA*F18K0-TFD

3DA3-060*-TFC 3DA3A060*-TFC 3DA*F28K*-TFC 150 30.3

3DA*-060*-TFD 3DA*A060*-TFD 3DA*F28K*-TFD

3DB3-0500-TFC 3DB3A0500-TFC 3DB*F22K0-TFC 115 18

3DB3-0500-TFD 3DB3A0500-TFC 3DB*F22K0-TFD

3DB3-0750-ES8 3DB3A0750-ES8 3DB3F33K*-ES8 167 29.2

3DB3-075*-TFC 3DB3A075*-TFC 3DB*F33K*-TFC 161 31.5

3DB3-075*-TFD 3DB3A075*-TFD 3DB*F33K*-TFD

3DF3-0750-TFC 3DF3A0750-TFC 3DF3F26K0-TFC 161 30.7

3DF3-0750-TFD 3DF3A0750-TFD 3DF*F26K0-TFD

3DF3-090*-TFC 3DF3A090*-TFC 3DF*F40K*-TFC 215 39

3DF3-090*-TFD 3DF3A090*-TFD 3DF*F40K*-TFD

N/A N/A 3DFDF26K0-TFC 161 30.7

3DG*-090*-TFC 3DG3A090*-TFC 3DG*F40K*-TFC 215 35.7

3DG3-090*-TFD 3DG3A090*-TFD 3DG3F40K*-TFD

N/A N/A 3DG8F40KE-TFD

3DGH-090*-TFD

N/A

N/A 3DGHF40K*-TFD

3DH3A060*-TFC 3DH3F28K*-TFC 150 30.3

N/A 3DH3A060*-TFD 3DH3F28K*-TFD

3DHH-060*-TFC 3DHHA060*-TFC 3DHHF28K*-TFC 150 26.8

3DHH-060*-TFD 3DHHA060*-TFD 3DHHF28K*-TFD

3DJH-075*-TFC 3DJHA075*-TFC 3DJ*F33K*-TFC 161 30.7

3DJH-075*-TFD 3DJHA075*-TFD 3DJHF33K*-TFD

3DJH-075*-TFD 3DJHA075*-TFD 3DJ3F33K*-TFD

3DR*-100*-TFC 3DR*A100*-TFC 3DR*F46K*-TFC 215 42

3DR*-100*-TFD 3DR*A100*-TFD 3DR*F46K*-TFD

3DS*-0750-TFC 3DS*A0750-TFC 3DS3F30K0-TFC 161 32

3DS*-0750-TFD 3DS*A0750-TFD 3DS3F30K0-TFD

3DS3-1000-ES8 3DS3A1000-ES8 3DS3F46K*-ES8 228 47.2

3DS*-100*-TFC 3DS*A100*-TFC 3DS*F46K*-TFC 215 42

3DS*-100*-TFD 3DS*A100*-TFD 3DS*F46K*-TFD

N/A N/A 3DS*F30K*-TFD

N/A

N/A

N/A

N/A

N/A

N/A

3DSDF30K0-TFC 161 32

3DSDF46K*-ES8 228 47.2

3DSDF46K*-TFC 215 42

30

25

40

50

50

40

40

40

50

40

40

40

30

40

50

40

50

50

58 29.2

74 47.2

74 47.2

2-25

2-30

2-25

77 13.7

58 10.1

83 16.1

83 15

106 16.9

106 15.6

106 16.7

106 16.7

77 13.7

77 12

83 16.1

83 14.3

106 18.6

83 16.4

106 18.6

83 16.4

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

21


AE10-1244 R19

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

Table 6 - Contactor Specifications & Selection Guide for 3D Compressors – Low and Medium Temp

(Continued)


Discus

Prior to 2006

Discus II

2006-2012

Discus III


Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

N/A N/A 3DF4S11M0-TFC 240 38.6

50

N/A N/A 3DF*S11M*-TFC 240 42.6

50

115 20.4

25

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

3DF*S11M*-TFD

3DK4S11M*-TFC 240 38.6

3DK4S11M*-TFD

3DKHS11M*-TFC 240 42.6

3DKHS11M*-TFD

3DS4S12M0-TFC 280 41.9

3D**S12M*-TFC 280 47.1

3DS4S12M0-TFD

3DS*S12M*-TFD

3DT4S12M*-TFD

3DTHS12M*-TFD

3DT4S12M*-TFC 280 41.9

40

50

50

50

50

115 18.6

115 20.4

136 21.3

136 22.8

136 21.3

136 22.8

25

25

25

25

25

25


22

AE10-1244 R19

Discus

Prior to 2006

N/A

Table 6 - Contactor Specifications & Selection Guide for 3D Compressors – High Temp


Discus II

2006-2012

N/A

Discus III


3DA*R10ML-ES8 228 26.8

Contactor

Amp

Rating

30

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

N/A

N/A

N/A

N/A

3DA3R10ME-ES8 228 32.7

3DA3R10M0-ES8 228 26.8

3DA3-075*-TFC 3DA3A075*-TFC 3DA*R10M*-TFC 215 41

3DA3-075*-TFD 3DA3A075*-TFD 3DA*R10M*-TFD

3DB3-100*-ES8 3DB3A100*-ES8 3DB*R12M*-ES8 228 48

3DB*-100*-TFC 3DB*A100*-TFC 3DB*R12M*-TFC 215 43.6

3DB3-100*-TFD 3DB3A100*-TFD 3DB*R12M*-TFD

3DE3-075*-TFC N/A 3DE3R10M*-TFC 215 41

3DEH-075*-TFC 3DEHA075*-TFC 3DEHR10M*-TFC 215 41

3DE3-075*-TFD N/A 3DE3R10M*-TFD

3DEH-075*-TFD 3DEHA075*-TFD 3DEHR10M*-TFD

N/A N/A 3DETR70KE-TFD

3DF*-120*-TFC 3DF*A120*-TFC 3DF*R15M*-TFC 275 48.2

3DF*-120*-TFD 3DF*A120*-TFD 3DF*R15M*-TFD

N/A 3DF8A075E-TFC 3DF8R98KE-TFC 161 30.7

3DK*-120*-TFC 3DK*A120*-TFC 3DK*R15M*-TFC 275 48.2

3DK*-120*-TFD 3DK*A120*-TFD 3DK*R15M*-TFD

N/A 3DP3A1000-ES8 3DP3R12M0-ES8 228 48

3DP*-100*-TFC 3DP*A100*-TFC 3DP*R12M*-TFC 215 43.6

3DP*-100*-TFD 3DP*A100*-TFD 3DP*R12M*-TFD

3DS*-150*-ES8 3DS*A150*-ES8 3DS*R17M*-ES8 316 57.6

3D**-150*-TFC 3D**A150*-TFC 3D**R17M*-TFC 275 59.6

3D**-150*-TFD 3D**A150*-TFD 3D**R17M*-TFD

N/A 3DS8A076E-TFD 3DS8R11ME-TFD

N/A

N/A

3DSTA075E-TFD 3DSTR11ME-TFD

N/A 3DT8R11ME-TFD

3DT3-1000-TFC 3DT3A1000-TFC 3DT3R11M0-TFC 215 42

3DT3-1000-TFD 3DT3A1000-TFD 3DT3R11M0-TFD

N/A N/A 3DTHR11ME-TFD

3DT*-1500-ES8 3DT*A1500-ES8 3DT3R17M0-ES8 316 57.6

40

30

50

50

50

50

50

50

40

50

50

50

60

75

50

60

74 48

74 48

108 57.6

108 57.6

2-30

2-30

2-30

2-30

106 20

106 20

106 20

106 20

58 11

138 23.6

138 23.6

106 20

138 29

83 16.4

83 16.4

83 16.4

106 18.6

106 18.6

25

25

30

25

25

25

25

25

25

25

25

25

25

25

23


AE10-1244 R19

Table 7 - Contactor Specifications & Selection Guide for 3D Compressors (575V)

575 volt - 1 contactor 575 volt - 2 contactors

Discus

Prior to 2006

Discus II

2006-2012

Discus III

2012-Present

LRA RLA

Contactor

Amp

Rating

LRA RLA

Contactor

Amp

Rating

3DA3-060*-TFE

3DA3-075*-TFE

3DA*060*-TFE

3DA*075*-TFE

3DA*F28K*-TFE 62 10.5

3DA*R10M*-TFE 84 16.5

3DB3-075*-TFE 3DB*A075*-TFE 3DB*F33K*-TFE 67 11

3DB3-100*-TFE 3DB*A100*-TFE 3DB*R12M*-TFE 84 16.5

3DE3-075*-TFE N/A 3DE*R10M*-TFE 84 16.5

3DEH-075*-TFE 3DEHA075*-TFE 3DEHR10M*-TFE 84 16.5

3DF3-090*-TFE 3DF3A090*-TFE 3DF*F40K*-TFE 84 16.5

3DG*-090*-TFE 3DG*A090*-TFE 3DG*F40K*-TFE 84 15.7

N/A 3DH3A060*-TFE 3DH3F28K*-TFE 62 10.5

3DHH-060*-TFE 3DHHA060*-TFE 3DHHF28K*-TFE 62 10.5

3DJH-075*-TFE 3DJHA075*-TFE 3DJ*F33K*-TFE 67 11

3DP*-100*-TFE 3DP3A100*-TFE 3DP*R12M*-TFE 84 16.5

3DRH-100*-TFE 3DRHA100*-TFE 3DR3F46K*-TFE 84 15.4

3DRH-100*-TFE N/A 3DRHF46K*-TFE 84 16.2

3DS3-0750-TFE 3DS3A0750-TFE 3DS3F30K0-TFE 67 11.5

3DS3-100*-TFE 3DS3A100*-TFE 3DS*F46K*-TFE 84 16.8

3D**-150*-TFE 3DS*A1500-TFE 3DS*R17M*-TFE 110 23.6

3DT3-1000-TFE 3DT3A1000-TFE 3DT3R11M0-TFE 84 16.8

3DT*-150*-TFE 3DT3A150L-TFE 3DT*R17M*-TFE 110 23.6

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

25

-Please reference OPI for additional refrigerant and application information.

-Models with a "D" or "X" in the fourth digit of the compressor nomenclature are digital. Please reference the baseline model, which would have an "N" or "3" in the fourth digital of the nomenclature, for contactor specification and selection.

The contents of this publication are presented for informational purposes only and are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Emerson Climate Technologies, Inc. and/or its affiliates

(collectively "Emerson"), as applicable, reserve the right to modify the design or specifications of such products at any time without notice. Emerson does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any

Emerson product remains solely with the purchaser or end user.

24


Emerson Recommended Contactor Selection for Three Phase Motor Control User Guide 24 Pages

Emerson Recommended Contactor Selection for Three Phase Motor Control User Guide

Recommended Contactor Selection for Three Phase Motor Control

May 2020

Safety Instructions

Safety Icon Explanation

DANGER

NOTICE

Instructions Pertaining to Risk of Electrical Shock, Fire, or Injury to Persons

Safety Statements

1. Introduction

Key Features

Frequently Answers and Questions

What are the different types of contactors available?

What factors should I consider when selecting a contactor?

How can I be sure that I am selecting the right contactor for my application?

Related manuals

Emerson Recommended Contactor Selection for Three Phase Motor Control User Guide 24 Pages

Emerson Recommended Contactor Selection for Three Phase Motor Control User Guide

Recommended Contactor Selection for Three Phase Motor Control

May 2020

Safety Instructions

Safety Icon Explanation

DANGER

NOTICE

Instructions Pertaining to Risk of Electrical Shock, Fire, or Injury to Persons

Safety Statements

1. Introduction

Key Features

Frequently Answers and Questions

What are the different types of contactors available?

What factors should I consider when selecting a contactor?

How can I be sure that I am selecting the right contactor for my application?

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