Instruction Leaflet

IL012043EN

Effective January 2016

Supersedes 12/2014

Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

Contents

Description Page

Section 1: General Information . . . . . . . . . . . . . . 2

Section 2 . Trip Unit Installation . . . . . . . . . . . . . . . 2

Section 3 . Trip Unit Controls and Functions . . . . . 5

Section 4 . Neutral Current Sensor Information . . . 7

Section 5 . 100% Rated LD and MDL Frame

Circuit Breakers . . . . . . . . . . . . . . . . . . 7

Instruction Leaflet IL012043EN

Effective January 2016

Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

WARNING

DO NOT ATTEMPT TO INSTALL OR PERFORM MAINTENANCE ON EQUIP-

MENT WHILE IT IS ENERGIZED. DEATH OR SEVERE PERSONAL INJURY

CAN RESULT FROM CONTACT WITH ENERGIZED EQUIPMENT. ALWAYS

VERIFY THAT NO VOLTAGE IS PRESENT BEFORE PROCEEDING.

Section 1: General Information

Table 1. Parts List

L OR M 310+ ELECTRONIC TRIP UNIT

IL FOR 310+ ELECTRONIC TRIP UNITS

NEUTRAL CURRENT SENSOR (GROUND FAULT ONLY)

NEUTRAL & ALARM LEADS (GROUND FAULT ONLY)

4TH POLE CT ASSEMBLY (4 POLE ONLY)

Section 2. Trip Unit Installation

Step 1

Remove the 8 screws (10 for MDL-frame) holding the base and cover together (Figure 1) .

Step 2

Remove the 2 retaining screws (3 for 4-pole breaker) from the shunt plate inserts in the base of the circuit breaker frame .

Step 3 (4-pole Only)

Plug the current sensor secondary winding connector into the receptacle in the side of the trip unit . Either polarity is acceptable since the secondary winding connector is not polarized .

Trip Unit

Secondary

Winding

Connector Current

Sensor

Figure 2. 4th Pole Installation.

Step 4

Position the retaining screws in the trip unit and current sensor conductor holes (Figure 3) .

Figure 3. Retaining Screws Location in Trip Unit.

Figure 1. LES Base-cover Screws.

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Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

Step 5

If present on the trip unit, route wires through the slots on the breaker frame's side (Figure 4) .

Instruction Leaflet IL012043EN

Effective January 2016

Step 6

Starting with the center pole (mech pole), tighten the three retaining screws in the trip unit and the fourth retaining screw in the current sensor . Torque to 10 – 12 lb .-ft . (14 – 16 N · m) (Figure 6) .



CAUTION

DO NOT EXCEED A TORQUE OF 10 – 12 LB.-FT. (14 – 16 N.m.). EXCESSIVE

TORQUING WILL SHEAR THE SCREWS. FAILURE TO APPLY THE REQUIRED

TORQUE MAY LEAD TO EXCESSIVE HEATING AND CAUSE NUISANCE

TRIPPING OF THE CIRCUIT BREAKER.

Trip Unit Retaining Screws

Line End

Torque 10-12 lb-ft, 3 x

(14-16 N·m .)

Test Port Trip Unit

N otee: Wires for optional features only .

Figure 4. Wire Routing Tunnels on Breaker Base.

Pull wiring harnesses through slots in frame until the cable ties reach the location shown in Figure 5 . Cable ties positioned below this location can result in an interference with the circuit breaker cover during assembly . It is not possible to have leads of wiring harnesses exit opposite sides of the breaker .

Load End

Figure 6. LES Trip Unit Mounting Screw Locations.

Line End

Trip Unit Retaining Screws Torque 10-12 lb-ft, 4 x

(14-16 N·m .)

Cable Ties

Test Port Trip Unit

Load End

Figure 7. LES 4-pole Trip Unit Mounting Screw Locations.

Breaker Frame

Wiring

Harnesses

Figure 5. Wire Routing Cable Tie Placement.

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3

Instruction Leaflet IL012043EN

Effective January 2016

Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

Step 7 (MES Trip Units)

Starting with the center pole (mech pole), torque line side screws to

10-12 lb .-ft . (14-16 N·m) and load side screws to 6 – 8 lb .-ft .

(8 – 10 N·m) (Figure 8) .

Step 9

Finish the installation by installing the cover on the base, as shown in Figure 10 .

Line End

TORQUE 18-23 LB-IN 8X

(2.0-2.6 N.m.)

Trip Unit Retaining Screws Torque 10-12 lb-ft, 3 x

(14-16 N·m .)

Test Port

Trip Unit

Torque 6-8 lb-ft, 6 x

(8-10 N·m .)

Load End

Figure 8. MES Trip Unit Mounting Screw Locations.

Step 8.

Install any accessories, if required, using the appropriate instruction leaflet .

The following types of internal accessories, which mount on the trip unit, are available for use . The number of the IL covering the installation of each accessory is shown .

•

•

Alarm (Signal)/Lockout (ASL) Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I .L . 29C183

Auxiliary Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I .L . 29C123

•

•

•

Shunt Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I .L . 29C146

Low Energy Shunt Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I .L . 29C147

Undervoltage Release Mechanism (Handle Reset) . . . . . . .I .L . 29C170

Trip Unit Wire Routings with Accessories:

• Alarm (Signal)/Lockout (ASL) Switch and Auxiliary Switch:

From trip unit, route wiring harnesses through the recessed center portion of the accessory bracket and through the slots in the breaker frame .

•

•

Shunt Trip:

From trip unit, route wiring harnesses through the recessed center portion of the accessory bracket overlapping the white and yellow accessory wires, over the shunt trip, and through the slots in the breaker frame .

Low Energy Shunt Trip and Undervoltage Release Mechanism

(Handle Reset):

From trip unit, route wiring harnesses under accessory bracket and through the slots in the breaker frame .

Figure 9. Re-attach Cover and Base of the Breaker.

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Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

Instruction Leaflet IL012043EN

Effective January 2016

Section 3. Trip Unit Controls and Functions

A . Trip unit controls and settings (refer to Figures 10 and 11) .

6636C85H21

1

6636C85H22

1

6636C85H23

1

6636C85H24

1

6636C85H25

1

Push To Trip

Push To Trip

Push To Trip

Push To Trip

Push To Trip

10 2

STATUS TEST / ALARM

C

D

B

A

E F

G

H

7

10

LONG

12

15

20

4

2

24

4

5

SHORT

6 7

8

3

2

3 4 5

10 2

STATUS TEST / ALARM

C

D

B

A

E F

G

H

7

10

LONG

12

15

20

4

2

24

4

5

SHORT

6 7

8

3

2 INST

120

SHORT

300

3 4 5 7

10 2 6

C

D

B

A

E

STATUS

F

G

H

7

10

LONG

12 15

20

4

2

24

SHORT

5

4

3

2

TEST / ALARM

6

7

8

.4

.6

GND

.8 1.0

.3

.2

120

GND

INST

300

3 4 5 9

10 2 6

C

B

D

A

E

STATUS

F

G

H

7

10

LONG

12 15

20

4

2

24

5

4

3

2

TEST / ALARM

SHORT

6

7

8

.4

.3

.2

.6

GND

.8 1.0

L

K

SHORT/GND

M N O

P

Q

J R

3 4 5 8

10 15 2

STATUS REMOTE MM TEST / ALARM

C

D

B

A

E

F

G

H

7

4

10

2

LONG

12

15

20

24

4

5

SHORT

6

7

8

3

2 INST

120

SHORT

300

3 4 5 7

10 15 2 6

Push To Trip

C

D

B

A

E

STATUS

F

G

H

REMOTE MM TEST / ALARM

.4

.6

.3

.2

7

10

4

2

LONG

12

15

20

24

4

SHORT

5

6

7

8

3

2

L

K

J

SHORT/GND

P

R

Q

6636C85H26

1 3 4 5 8

Figure 10. LES / MES Trip Units Settings.

Clear

Windo w

Clear

Windo w

Clear

Windo w

Clear

Windo w

Clear

Windo w

Clear

Windo w

LS

LSI

LSG

LSIG

LSI+ Remote MM

LSIG+ Remote MM

I r

Settings

LES

A = 250A

B = 300A

C = 315A

D = 350A

E = 400A

F = 450A

G = 500A

H = 600A = In

MES

A = 320A

B = 400A

C = 450A

D = 500A

E = 600A

F = 630A

G = 700A

H = 800A = In

*Settings

Inst. 120 300

Inst.

J K L t sd

(ms)

120

300 t

M

P g

(ms) n

Q

Figure 11. LSIG Short Delay and Ground Fault Time Settings.

O

R

1 . Test Port - A test port is built into each trip unit to allow use of a functional test kit . The test kit performs a test of the Long Delay,

Short Delay and Ground Fault functions (Plug-In Test Kit Catalog

#MTST230V) . Remove the test port cover prior to connecting to the test port .

2 . Test/Alarm LED - A dual function, bi-color (red-amber) LED . It is used as an amber no trip indicator when using the test port . In normal modes, the red LED indicates a high load alarm . For a high load alarm, it will blink ON-OFF if the continuous current is

105% of the I r onds .

setting and is present for a duration over 38 sec-

3 . I r

- Continuous current setting . In accordance with standards requirements, the trip unit initiates a trip of the circuit breaker within 2 hours for an overload of 135% and will trip as a function of l²t for higher currents . Continuous current values for each lettered setting are indicated by the chart displayed on the left side of the trip unit label .

4 . t r

- The number of seconds required to trip @ 6x I if I r

= 250A, t r

. For example,

= 2 sec, and load current = 1500A, or 6x I r

, then the breaker will trip in 2 seconds .

r

5 . l sd

- Setting in multiples of l r after a predetermined delay .

for short circuit conditions that exceed the short delay pick-up setting, the trip unit initiates a trip

N otee: In addition to the short delay trip function, there is a fixed instantaneous override for the 600A and 800A trip units . The override for the

600A is fixed at 5620A, the override for the 800A is fixed at 6800A . If a fault current exceeds these override values, the breaker will trip instantaneously (in 20 milliseconds or less) .

6 . I g

- Ground fault pick-up setting . It is used on the LSIG and LSG styles to set the ground fault pick-up as a percentage of I current) . For example, a 600A frame with an I provide a ground fault pick-up at 240A .

g n

(frame

setting of 0 .4 will

7 . t sd

- for the LSI style, the short delay time is a flat response determined by the tsd switch settings of INST 120ms, or 300ms .

For the LS styles, the short delay time is an I²t function, with a delay of 67ms at a Isd setting of 6x .

8 . t sd

/ t g

- For the LSIG style, the short delay is a flat response determined by the tsd/tg switch settings of INST 120ms or

300ms . This switch is a dual switch that also determines the ground fault time settings of INST, 120ms or 300ms . For example, if the t set the t sd sd

/t g

switch is set at position J, then both short delay time and ground fault time are at INST flat . As another example,

/t g

switch at position L; the short delay time is INST and the ground fault time is 300ms . The LSIG label (Figure 11) should be used in conjunction with the t sd

/t g fault times .

switch to set any one of nine possible combinations of short delay and ground

9 . t g

- For the LSG style, the short delay time is an I²t function while the ground fault flat time is set by the t g

switch .

10 . Status LED - A green status light indicates the operational status of the trip unit . If the load current exceeds approximately 20% of the maximum current rating (I n

) of the breaker, the status light

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5

Instruction Leaflet IL012043EN

Effective January 2016

Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit will blink on for one second and off for one second .

B . Other features and options of the LES/MES 310+ trip units .

1 . The High Load Alarm Relay option will provide a SPST contact closure when the trip unit current equals or is greater than 105% of In for a period of 38 seconds . If the current drops below the

105% value, the contact will open . The yellow and green wires that exit the right side of the breaker are the common (C) and normally open (NO) of this relay (See Figure 12) .

2 . The Ground Fault Alarm Only option operates in a similar fashion as the High Load Alarm . The SPST contact will close if the ground fault pick-up setting is exceeded and will open when below the ground fault pick-up setting . The yellow and green wires that exit the right side of the breaker are the common (C) and normally open (NO) of this relay (See Figure 12) .

3 . The Ground Fault Relay option will provide a SPST contact closure immediately before the breaker will trip on a ground fault over current detect . This closure is momentary (50ms) and the customer must provide the necessary external circuitry in order to latch this signal . The yellow and green wires that exit the right side of the breaker are the common (C) and normally open (NO) of this relay (See Figure 12) .

N otee: The High Load Alarm Relay can be selected with LS, LSI LSG, and

LSIG trip units . For the LSG and LSIG trip units, the High Load Alarm will function normally . However, if the breaker trips due to a ground fault condition, the relay will respond with a ground fault alarm as indicated above .

The Ground Fault Alarm Only can be selected for LSG and LSIG trip units only . This selection has precedence over all other relay functions . When the Ground Fault Alarm Only is selected, the

High Load Alarm Relay feature is not available .

N otee: The contact ratings of the relay are: 2A at 30 VDC and 0 .5 A at

125 VAC .

Multiple breakers may be connected in a system to create a zone of protection . For faults outside the zone of protection, the trip unit of the circuit breaker nearest the fault sends an interlocking signal (Z er . (Z in out

) to the trip unit of the up-stream circuit break-

) This interlocking signal restrains immediate tripping of the upstream circuit breaker until its programmed coordination time is reached . Thus zone selective interlocking applied correctly can reduce damage due to circuit or ground fault conditions . A table of the settings of the two breakers with the respective outcomes (Both Trip or Downstream (Dn) Trips) of the breakers is indicated below for the conditions mentioned in the table heading .

INST

120ms

300ms

INST

Both

Both

Both

Upstream

120ms

Dn 43ms

Dn 52ms

Dn 43ms

300ms

Dn 43ms

Dn 52ms

Dn 43ms

N otee: A single breaker with the Zone Selective Interlocking feature enabled will not trip at the programmed time settings, unless Self Interlocked . That is, the Z out

wire should be connected to the Z in

wire .

4 . The Zone Selective Interlock (ZSI) option provides a wired method of coordinating Upstream and Downstream breakers . The coordinating signals are provided by the White\Red stripe (Z

White\Black stripe (Z out in

),

), and Black (common ground) wires that exit the right side of the breaker . ZSI may be ordered on LSI and

LSIG trip units .

Zone Selective Interlocking is active for the short delay and the ground fault delay tripping functions . The LES/MES 310+

Trip Unit Zone Selective Interlocking feature is compatible with

OPTIM and Digitrip Trip Units, including all other 310+ models on

Series G: (RG, NG LG, JG) and Series C (FD and KD) breakers .

Three wires exit the breaker with the following color code and function: White/Black Stripe=Zone Out, White/Red Stripe=Zone

In, and Black=Common (See Figure 12) .

A typical connection for a two breaker system is accomplished by connecting the Z out

wire of the downstream breaker to the Z in of the upstream breaker . The common black wires of both breakers must also be connected .

If a high current fault is sensed from the load on the downstream breaker, both breakers will sense the fault . However, the downstream breaker will send the interlock signal to the upstream breaker informing it not to trip . This delay allows the downstream breaker to clear the fault without the upstream breaker tripping .

However, if for some reason the downstream breaker does not clear the fault in the set delay time, the upstream breaker will then clear the fault at or before its defined t sd

or t g

.

5 . Remote Maintenance Mode (RMM) is an option that allows a user to remotely lower the instantaneous pickup of the breaker to 2 .5x the frame rating (I n delays (t sd

or t g

), and to bypass any programmed

) . The purpose of the function is to to reduce incident energy during a fault condition .

For example, a 600A (I n

) LD breaker with the switch set to 2 .5x would trip instantaneously when the current exceeded 1500 A .

The RMM is enabled by applying 24VDC to the two wire cable that exits the left side of the breaker . The wires are color coded

Yellow (+24V) and Black (common ground) - see Figure 14 . A blue colored LED on the trip unit lights when the breaker is in

RMM (Figure 13) .

The lighted blue LED indicates that RMM is enabled . This setting corresponds to 2 .5x of I n

. Turning the I sd

switch on the trip unit has no effect on either the Maintenance Mode or the t sd tings while the blue LED is lit .

\t g

set-

Also, a relay contact closure indicates that the RMM has been enabled . The blue and red wires are the C and NO contacts of this relay . The relay has a dual function: 1) enable RMM and 2) provide a contact closure indication that RMM is enabled .

Both the yellow and black set of wires and the red and blue set of wires exit on the left side of the breaker .

N otee:

VAC .

The RMM contacts are rated at 2A at 30 VDC and 0 .5A at 125

6 EATON www.eaton.com

Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

Instruction Leaflet IL012043EN

Effective January 2016

2

D7

NRD4004

1

REMOTE

MAINT.

MODE

BLK

YEL

1

NRD4004

2

K2

1 +

10

-

NC1

2

3

W1

NO1 4

9

NC2

8

W2

NO2 7

CONT 2A 24VDC

TQ2SA-24V

ZOUT

ZIN

N.C.

J7-2

2 1

MMSZ4703

16V 5%

J7-8

J7-7

J7-5

J7-1

J7-3

J7-4

8

W2

K1

NO2

7

NC2 9

4

NO1

3

W1

NC1 2

10

-

1

+

CONT 2A 24VDC

10.0K

1/16W 1%

2

1

BLUE T-1

ALARM

RELAY

ZSI

GRN

YEL

BLK

WHI/BLK STRIPE

N.C.

WHI/RED STRIPE

NEUTRAL

GRY

J7-6 WHI

8-POS "PHD" RA

CABLE

Figure 12. Alarm, ZSI, and Neutral Wiring Diagram.

RMM CONTACTS

RED

BLU

Section 4. Neutral Current Sensor Information.

Ground fault trip units are supplied from the factory with pigtail lead connections for a neutral current sensor (white and grey wires) . A neutral current sensor shown in Figure 14 is available .

310+ Ground Fault Trip Units detect ground fault currents through

Residual Sensing . They are not designed to use source ground or zero sequence ground fault sensing methods . If the system neutral is grounded, but no phase to neutral loads are used, the neutral current sensor is not necessary . In that case, the white and grey leads on the trip should be cut off before installation . If the system neutral is grounded and phase to neutral loads are used, then the neutral current sensor must be used . It should be connected to the breaker according to Figure 15 It has the same turns ratio as the phase current sensors in the trip unit .

NOTICE

THE POLARITY OF THE SENSOR CONNECTIONS IS CRITICAL. ALWAYS

OBSERVE THE POLARITY MARKINGS ON THE INSTALLATION DRAW-

INGS. THE POLARITY MARKINGS ARE IDENTIFIED AS WHITE DOTS ON

THE TRANSFORMERS. TO INSURE CORRECT GROUND FAULT EQUIPMENT

PERFORMANCE, CONDUCT FIELD TESTS TO COMPLY WITH NATIONAL

ELECTRIC CODE REQUIREMENTS UNDER ARTICLE 230-95-C.

N otee: See wiring instructions below for special restrictions on accessory wiring for ground fault breakers . Then install the ground fault alarm and neutral current sensor connector printed circuit board as described previously .



CAUTION

LEADS COULD BE DAMAGED IF IN CONTACT WITH MOVING PARTS.

ACCESSORY WIRES SHOULD BE FORMED AND ROUTED TO CLEAR ALL

MOVING PARTS.

Leads to be routed:

1 . 2 leads (white and grey) for the neutral current sensor .

2 . 2 leads (yellow and green) for the ground fault alarm relay

It is not possible to have leads exiting the breaker on the opposite side . For rear exiting leads, thread the leads through the wiring troughs/tunnels in the side of the circuit breaker case . For side exiting leads, use the slots in the side of the case . Use the center trough or slot for the neutral current sensor leads (white and grey) and the trough or slot closest to the trip unit for the alarm leads (yellow and green) .

Any other leads to be brought out should then be threaded through the wiring trough closest to the trip unit .

Section 5. 100% Rated LD and MDL Frame

Circuit Breakers

CLD, CHLD, CLDC, CMDL, and CHMDL circuit breakers are suitable for continuous operation at 100% of the frame rating if used with

CU only 90° C insulated wire and AL9CU terminals in an enclosure which measures at least 24” high x 15” wide x 6” deep for the LD and 42" high x 18" wide x 7 .5" deep for the MDL . Ventilation is not required in an enclosure having these minimum dimensions .

Figure 13. Remote Maintenance Mode Wiring Diagram.

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7

Instruction Leaflet IL012043EN

Effective January 2016

(

2X Ø

[7,11]

.280

THRU HOLE

POLARITY MARKINGS

.617

([15.67])

)

1.50 AT TOP

[38,1]

.50

.03

[0,76]

[12,70]

4X R

[9,14]

.36

.31

[7,87]

[6,35]

.25

1.47

[37,34]

1.44

[36.58]

( 4.376

([111,13])

5.610

[142.49]

)

5.69

AT TOP

[144,53]

4X R

[7,11]

.28

( 1.000

([25,40])

)

( 2.000

([50,80])

)

1/2" BOLTS

(NOT INCLUDED)

.50

12,70]

Instruction Leaflet for the

LES/MES 310+ Electronic Trip Unit

2.188

[55,58]

1.188

[30,18]

Figure 14. Neutral Current Sensor.

5.75

[146,05]

AT BASE

Figure 15. Neutral and Alarm Wiring Diagram.

Eaton

Electrical Sector

1000 Eaton Boulevard

Cleveland, OH 44122

United States

877-ETN-CARE (877-386-2273)

Eaton.com

© 2016 Eaton

All Rights Reserved

Printed in USA

Publication No. IL012043EN / TBG001166

Part Number: IL012043ENH03

January 2016

2.25

[57,15]

1.17

[29,72]

2.25

[57,15]

AT TOP

2.33

[59,18]

AT BASE

2.91

[73,91]

AT BASE

The information, recommendations, descriptions, and safety notations in this document are based on Eaton’s experience and judgment with respect to Retrofitting of Power Breakers . This instructional literature is published solely for information purposes and should not be considered all-inclusive . If further information is required, you should consult an authorized Eaton sales representative .

The sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreement between the parties . This literature is not intended to and does not enlarge or add to any such contract .

The sole source governing the rights and remedies of any purchaser of this equipment is the contract between the purchaser and Eaton .

NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING

WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR

MERCHANTABILITY, OR WARRANTIES ARISING FROM COURSE

OF DEALING OR USAGE OF TRADE, ARE MADE REGARDING

THE INFORMATION, RECOMMENDATIONS, AND DESCRIPTIONS

CONTAINED HEREIN.

In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or otherwise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recommendations and description contained herein .

Eaton is a registered trademark.

All other trademarks are property of their respective owners.