ASCO 7000 Series ACTS automatic transfer switch Operator's manual

Operator’s

Manual

7000 Series ACTS

Automatic Closed–Transition Transfer Switches

E–design 150–400A, F–design 600–800A,

G–design 1000–4000A, F–design 3000–4000A,

DANGER is used in this manual to warn of high voltages capable of causing shock, burns, or death.

WARNING is used in this manual to warn of possible personal injury.

CAUTION is used in this manual to warn of possible equipment damage.

Refer to the outline and wiring drawings provided with your 7000 Series ACTS for all installation and connection details and accessories.

Refer to Group 5 Controller User’s Guide

381333–126 for ATS status display messages, time delays, pickup & dropout settings, and adjustments.

An experienced licensed electrician must install the

ACTS.

Rating Label

Each automatic closed–transition transfer switch contains a rating label to define the loads and fault circuit withstand / closing ratings. Refer to the label on the transfer switch for specific values.

Do not exceed the values on the rating label.

Exceeding the rating can cause personal injury or serious equipment damage.

Nameplate

The Transfer Switch nameplate includes data for each specific 7000 Series ACTS. Use the switch only within the limits shown on this nameplate. A typical catalog number is shown on the next page with its elements explained.

TABLE OF CONTENTS

section-page

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . .

Mounting and Line Connections

Auxiliary Circuits and Harness

. . . . . . . . .

. . . . . . . . . . .

1-1

1-1

1-2

Engine Starting Contacts

Functional Test

. . . . . . . . . . . . . . .

. . . . . . . . . . . . .

1-2

1-2, 1-3, 1-4, 1-5

TESTING & SERVICE

Transfer Test . . . . . . . . . . . . . . . . . . . . . . . . . .

Preventive Maintenance

Disconnecting the Controller

Manual Load Transfer

Trouble-Shooting

INDEX

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . .

. . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .

2-1

2-1

2-1

2-1

2-2

2-2 back cover

150 – 400 ampere sizes

50 Hanover Road, Florham Park, New Jersey 07932–1591 USA

For sales or service call 1 800 800–2726 (ASCO) www.ascopower.com

ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3

381333–128 E

Typical 7000 Series catalog no. for E–design switched neutral, 3 pole, 400 amp, 480 V, ACTS in Type 1 enclosure:

E 7ACTS C 3 400 N 5 C

design prefix letter

Neutral

Catalog Number Identification

Phase Poles Amperes Voltage Controller Enclosure

A

– solid

B

– switched

C

– overlapping blank – none

2

3

– single Ø

– three Ø

150

400

600

800

1000

260 1200

1600

2000

3000

4000

A

B

C

D

220

E

230

F

240

G

277

H

115

120

208

380

J

K

L

400

415

440

M

460

N

480

P

550

Q

575

R

600

5

– standard

5X

– if accessories ordered

C

– type 1

F

– type 3R

G

– type 4

L

– type 12 blank – open type field connections terminal block TB power connections

Transfer

Control

& lights

Dual

Transfer

Switch

Group 5

Controller power connections

150–400 amp. sizes in typical enclosure with location of customer connections

SECTION 1 INSTALLATION

ASCO Series 7000 Automatic Closed–Transition Transfer

Switches are factory wired and tested. Field installation simply requires mounting and connection of service cables, and auxiliary control circuits (if required).

Remove the Shipping Skid

For large switches, open the front door and remove the four lag screws (2 in front, 2 in rear) securing enclosure to the wood skid.

Supporting Foundation

De–energize the conductors before making any line or auxiliary circuitry connections. Be sure that Normal and Emergency line connections are in proper phase rotation. Place engine generator starting control in the OFF position.

Make sure engine generator is not in operation.

Testing Power Conductors

The supporting foundation for the enclosure must level and straight. Refer to the applicable enclosure outline drawing included with the ACTS for all mounting details including door opening space.

If bottom cable entry is used, the foundation must be prepared so that the conduit stubs are located correctly.

Refer to the enclosure outline drawing for specified area and location. Provide cable bending space and clearance to live metal parts. When a concrete floor is poured, use interlocking conduit spacer caps or a wood or metal template to maintain proper conduit alignment.

Do not connect the power conductors to the transfer switch until they are tested. Installing power cables in conduit, cable troughs and ceiling-suspended hangers often requires considerable force. The pulling of cables can damage insulation and stretch or break the conductor’s strands. For this reason, after the cables are pulled into position, and before they are connected, they should be tested to verify that they are not defective or have been damaged during installation.

Connecting Power Conductors

Mounting

Refer to the outline and mounting diagram provided with the ACTS; it shows all mounting details and instructions.

Protect the switch from construction grit and metal chips to prevent malfunction or shortened life of the automatic switch switch.

Mount the ACTS vertically to a rigid supporting structure.

Level all mounting points by using flat washers behind the holes to avoid distortion of the switch.

After the power cables have been tested, connect them to the appropriate terminal lugs on the transfer switch as shown on the wiring diagram provided with the switch. Make sure the lugs provided are suitable for use with the cables being installed. Standard terminal lugs are solderless screw type and will accept the wire sizes listed on the drawings provided with the switch. Be careful when stripping insulation from the cables; avoid nicking or ringing the conductor. Remove surface oxides from cables by cleaning with a wire brush. When aluminum cable is used, apply joint compound to conductors. Tighten cable lugs to the torque specified on rating label.

The controller is mounted on the cabinet door. An add-on DIN rail is provided for some optional accessories and is mounted below controller on the door.

Auxiliary Cable Boxes

Do not run cables in front of or behind the switch.

Cables can be bundled on the right side of the switch.

Maintain proper electrical clearance between the live metal parts and grounded metal: ½ inch minimum for

150-400 amps, 1 inch minimum over 400 amps.

For 1000 & 1200 amp. sizes, an auxiliary cable box is required for all (normal, emergency, & load)bottom or top entry. Order ASCO part no. 609027 if required.

It is not necessary to remove the barriers from the transfer switches to install the cables. If you do remove them,however, be sure to reinstall the barriers carefully.

Bus Connections

On 1000 & 1200 amp. be sure to install auxiliary cable box if both service and load cables are entering through the top or bottom of enclosure.

For large switches use grade 5 hardware to connect bus to appropriate terminal plates. Wipe off the bus surfaces before they are joined. If the bus is very dirty, gently clean the surfaces with a non---flammable solvent.

Avoid touching the cleaned surfaces.

Line Connections

A Wiring Diagram is furnished with the ASCO Series

7000 ACTS (separate from this manual). Refer to this drawing. All wiring must be made in accordance with the National Electrical Code and local codes.

Do not breathe cleaning solvent vapors.

1---1

INSTALLATION

(continued)

Tighten bolted joints to the torque specified in Table A.

Engine Starting Contacts

The reliablility of the connection depends on how clean and how tight the joint is.

The engine control contact connections (if used) are located on the transfer switch. Connect signal wires to appropriate terminals as specified in Table B and shown in Figure 1–1.

Table A. Tightening torque values for bolted joints

(Grade 5 hardware)

Bolt Diameter in inches

1/4

5/16

3/8

1/2

5/8

3/4

Tightening Torque in foot pounds

7

12

20

50

95

155

Table B. Engine start connections

When normal source fails

contact closes contact opens

Terminals on transfer switch

TB1 and TB2

TB1 and TB3

Note:

To temporarily disable engine control from the automatic transfer switch you can unplug J3 from the small P3 receptacle at the bottom of the assembly. Be sure to reconnect plug J3 to the P3 receptacle for automatic transfer switch operation.

Controller Ground

A grounding wire must be connected to the controller’s lower left mounting stud. Because the controller is mounted on the enclosure door, a conductive strap must be used between the enclosure and the door. This connection provides proper grounding which does not rely upon the door hinges.

Harnesses

The transfer switch is connected to the left side of the control panel by a plug-in harness (two plugs).

engine start connections on customer terminal block TB

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on the transfer switch. Note the control features that are furnished on this switch. Make the necessary auxiliary connections by referring to the Wiring Diagram.

Figure 1-1. Customer terminal block on the top right side of enclosure.

The Functional Test consists of three checks:

S 1 — Manual Operation Test, page 1–3

Functional Test

Read all instructions on the Wiring Diagram and labels affixed to the ACTS. Note the control features that are provided and review their operation before proceeding.

S 2 — Voltage Checks, page 1–4

Continue to 1 – Manual Operation Test on next page.

S 3 — Electrical Operation, page 1–5

Do these checks in the order presented to avoid damaging the ATS.

1---2

handle

INSTALLATION

(continued)

shafts

handle

handle

Figure 1-2.

150 – 400 A (3 pole)

E–design switches

Figure 1-3.

600 & 800 A (& 4 pole 400 A)

F–design switches

1 – Manual Operation

A detachable manual operator handle is provided on the

Transfer Switches for maintenance purposes only.

Manual operation of both CN and CE transfer switches must be checked before they are operated electrically.

Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

1. Select the appropriate switch amperage size above and follow the directions for installing the handle:

150 through 400 amp. E–design

See Figure 1-2.

Insert the manual handle into the hole in the shaft, left side of the operator.

600 and 800 amp. F–design

See Figure 1-3.

Attach the manual handle onto the pivot shaft extension, left side of the operator.

Figure 1-4

3000 & 4000 A

F–design transfer switches

1000 through 4000 amp. G–design

See Figure 1-5.

Install the hub (with pin) onto the shaft and insert the manual firmly into the side hole in the hub. Push in or pull out hub to engage opposite source contacts.

3000 and 4000 amp. F–design

See Figure 1-4.

Insert the manual handle into the hole in the weight.

2. Move the handle as shown to manually operate the

Transfer Switch. The switch should operate smoothly without binding. If it does not, check for shipping damage or construction debris. Repeat the manual operation check on the other Transfer Switch.

3. Return the CN Transfer Switch to the C (closed) position. Return the CE Transfer Switch to the O

(open) position. Remove manual operator handle and store it on the Transfer Switch in the place provided.

Verify that the maintenance handle has been removed and stored properly before proceeding!

Emergency contacts

Grasp handle firmly with both hands

Now continue to 2 – Voltage Checks on next page.

Turn counterclockwise to OPEN contacts.

Turn clockwise to

CLOSE contacts.

Insert handle into hole

(spring fully compressed)

Slide the hub onto the shaft and insert the pin.

window indicators

OPEN or

CLOSED

Normal contacts contact position indicators (left side)

counterclockwise DOWN

OPENS the contacts

Pull out shaft to open Emergency source contacts (upper)

Push in shaft to open Normal source contacts (lower) clockwise DOWN

CLOSES the contacts

Pull out shaft to close Emergency source contacts (upper)

Push in shaft to close Normal source contacts (lower)

Figure 1-5. 1000 – 4000 ampere G–design transfer switches.

1---3

INSTALLATION

(continued)

GREEN

RED

RED RED RED observe these lights

GREEN

RED

Figure 1-6. Standard controls and indicators.

2 --- Voltage Checks

First check nameplate on transfer switch; rated voltage must be the same as normal and emergency line voltages.

1

Close the normal source circuit breaker. The

Transfer Switch

Connected To Normal and the

Normal Source Accepted lights should come on.

Verify that the feeders have been connected to the proper lugs.

Before energizing the switch check to be sure that both normal and emergency contacts are not left in the closed position.

Use extreme caution when using a meter to measure voltages. Do not touch power terminals; shock, burns, or death could result !

4

Perform steps 1 through 6 at the right. Observe the status lights. See Figure 1---6.

Q

Black square means light is on.

S

White square means light is off.

5

* If necessary, adjust voltage regulator on the generator according to the manufacturer’s recommendations. The

Automatic Transfer Switch will respond only to the rated voltage specified on the Transfer Switch nameplate.

Note:

Refer to Section 3 of Group 5 Controller User’s

Guide

381333–126 for how to display the Status of the

ATS and the Voltage and Frequency of each source.

Now continue to 3 --- Electrical Operation on next page.

First check nameplate on transfer switch; rated voltage must be the same as normal and emergency line voltages.

1---4

6

2

3

Use an accurate voltmeter to check phase to phase and phase to neutral voltages present at the transfer switch normal source terminals.

Close the emergency source circuit breaker. (Start generator, if necessary.) The

Transfer

Switch Connected To Normal &

Emergency Source Accepted

lights should come on.

Use an accurate voltmeter to check phase to phase and phase to neutral voltages present at the transfer switch emergency source terminals.*

Use a phase rotation meter to check phase rotation of emergency source; it must be the same as the normal source.

Shut down the engine–generator, if applicable. The

Emergen-

cy Source Accepted light should go off. Then put the starting control selector switch (on the generator set) in the

automatic

position. Close enclosure door.

A B C

INSTALLATION

(continued)

GREEN

RED

RED RED RED observe these lights operate this switch

GREEN

RED

Figure 1-7. Standard controls and indicators.

3 --- Electrical Operation

This procedure will check the electrical operation of the

Automatic Closed–Transition Transfer Switch. See

Figure 1---7.

1

The

Transfer Switch Connected

To Normal and Normal Source

Accepted lights should be on.

Be sure to close the enclosure door before proceeding to prevent personal injury in case of electrical system fault.

Transfer Test

Both normal and emergency sources must be available and the emergency source generator (if used) must be capable of being started in this procedure.

Perform steps 1 through 5 at the right. Observe the status lights.

Q

Black square means light is on.

S

White square means light is off.

** If you do not want closed–transition transfer, press the

Closed Transition Bypass pushbutton while the controller display shows Waiting for In–Sync. This action causes open–transition (momentary load interruption) transfer to the opposite source, if conditions permit. Also refer to the Group 5 Controller

User’s Guide

381333–126.

This completes the Functional Test of the ACTS.

2

3

4

Turn and hold

Transfer Control

switch clockwise to Transfer Test until the engine starts and runs

(within 15 sec.).

Emergency

Source Accepted light should come on.

Transfer switch CE closes and then Transfer Switch CN opens

(closed–transition overlap). The

Transfer Switch Connected To

Emergency light should come on and the

Transfer Switch

Connected to Normal light goes off (you might see and hear the brief overlap transfer). **

Transfer switch will operate back to Normal position after Feature

3A time delay. For immediate retransfer turn

Transfer Control

counterclockwise to

Retransfer

Delay Bypass. The Transfer

Switch Connected To Normal light should come on;

Transfer Switch

Connected to Emergency light should go off.

5

The engine–generator will stop after the Feature 2E time delay

(unloaded running engine cooldown). The

Emergency Source

Accepted light should go off.

1---5

SECTION 2 TESTING & SERVICE

TRANSFER TEST

Operate the 7000 Series ACTS at least once a month by following the five–step Electrical Operation

Transfer Test

procedure on page 1–5.

DISCONNECTING THE CONTROLLER

The harness disconnect plugs are furnished for repair purposes only and should not have to be unplugged.

If the controller must be isolated, follow these steps:

Disconnecting the Plugs

PREVENTIVE MAINTENANCE

Reasonable care in preventive maintenance will insure high reliability and long life for the 7000 Series ACTS.

An annual preventive maintenance program is recommended.

In the United States, ASCO Services, Inc. (ASI) is ASCO Power Technologies’s national service organization. ASI can be contacted at

1-800-800-2726 (ASCO) for information on preventive maintenance agreements.

Checklist for Yearly Inspection

Hazardous voltage capable of causing shock, burns, or death is used in this switch.

Deenergize both Normal – Emergency power sources before performing inspections!

Do not unplug the controller until steps 1a or 1b is completed.

1. Observe the position of the transfer switch.

a. If the transfer switch is in the Normal position, first place standby engine starting control in the

off position. Second, then open the emergency source circuit breaker. Third, open the normal source circuit breaker.

b. If the transfer switch is in the Emergency position, first open the normal source circuit breaker. Second, place the engine starting control in the test or run position. Third, open the emergency source circuit breaker.

2. Separate the two quick disconnect plugs by squeezing the latches. Do not pull on the harness wires.

Reconnecting the Plugs

S Clean the ACTS enclosure. Brush and vacuum away any excessive dust accumulation. Remove any moisture with a clean cloth.

S

Check the transfer switch contacts. Remove the transfer switch barriers and check contact condition.

Replace the contacts if they become pitted or worn excessively. Reinstall the barriers carefully.

S Maintain transfer switch lubrication. If the transfer switch is subjected to severe dust or abnormal operating conditions, renew factory lubrication on all movements and linkages.

Relubricate the solenoid operator if the TS coil is replaced. Do not use oil; order lubrication kit

75-100.

S Check all cable connections & retighten them.

REPLACEMENT PARTS

Replacement parts are available in kit form. When ordering parts provide the Serial No., Bill of Material

No. (BOM), and Catalog No. from the transfer switch nameplate. Contact your local ASCO Power Technologies Sales Office or ASI:

in United States call 1 800 – 800 – ASCO (2726)

Do not unplug the controller until steps 1a or 1b is completed.

1. Observe the position of the transfer switch.

a. If the transfer switch is in the Normal position, first be sure that both normal and emergency source circuit breakers are open. Second, be sure that the standby engine starting control is still in the off position.

b. If the transfer switch is in the Emergency position, first be sure that both normal and emergency source circuit breakers are open.

2. The two harness plugs and sockets are keyed.

Carefully align the plugs with the sockets and press straight in until both latches click. Close the door!

3. Restore the two sources in sequence as follows: a. If the transfer switch is in the Normal position, first close the normal source circuit breaker.

Second, close the emergency source circuit breaker. Third, place the standby engine starting control in the automatic position.

b. If the transfer switch is in the Emergency position, first close the emergency source circuit breaker. Second close the normal source circuit breaker.

2---1

TESTING & SERVICE

(continued)

MANUAL LOAD TRANSFER

This procedure will manually transfer the load if the controller is disconnected.

2. Use the maintenance handle to manually operate the transfer switch to the opposite source. First open the closed contacts, then close the other contacts. Do not leave both closed. See Manual Operation on page

1–3.

3. Then remove the maintenance handle. See page 1–3.

Do not manually operate the transfer switch until both power sources are disconnected

(all conductors deenergized).

1. Deenergize both the normal and emergency source conductors (remove fuses or open circuit breakers).

Verify that the maintenance handle has been removed before proceeding!

4. If the transfer switch is in the Emergency position manually start the engine generator and then install emergency source fuse or close the circuit breaker.

TROUBLE-SHOOTING

Note any optional accessories that may be furnished on the ACTS and review their operation. Refer to any separate drawings and/or instructions that may be packed with the ACTS.

Hazardous voltage capable of causing shock, burns, or death is used in this switch.

Do not touch the power or load terminals of the transfer switch!

Table 2-1. Trouble-Shooting Checks.

Engine–generator set does not start when the Transfer

Control switch is turned and held in Transfer Test position or when normal source fails.

Transfer switch does not transfer the load to the emergency source after the engine–generator set starts.

Transfer switch does not transfer the load to normal source when normal returns or when the Transfer Control switch is released.

Gen. does not stop after load retransfer to normal source.

Failure to Synchronize

light comes on.

Extended Parallel Time

light comes on.

TS Locked Out

light comes on.

CHECK IN NUMERICAL SEQUENCE

1 OPERATION

Hold Transfer Test switch 15 seconds or the outage must be long enough to allow for

Feature 1C time delay plus engine cranking and starting.

2 GEN-SET

Starting control must be in the automatic position. Batteries must be charged and connected. Check wiring to engine starting contacts.

Wait for Feature 2B time delay to time out.

Generator output circuit breaker must be closed.

Generator frequency must be at least 95% of nominal (57 Hz for a 60 Hz system.) *

3 VOLTAGE

---

Voltmeter should read at least

90% of nominal phase to phase voltage between terminals EA and EC (or EL1 and EL2 for 2 pole switches)*

Wait for Feature 3A time delay to time out.

---

Voltmeter should read at least

90% of nominal phase to phase voltage between terminals NB and NC, NC and

NA, and NA and NB (or NL1 and NL2 for 2 pole switches).

Wait for Feature 2E time delay to time out.

Starting control must be in the automatic position.

---

Conditions of Normal or Emergency Sources not suitable for closed transition transfer.

Recheck voltage and frequency of both sources. Press Alarm Reset pushbutton.

CN and CE contacts are closed longer than setting in the Control Panel. Open the disconnected source circuit breaker, then call your nearest ASCO Service Center for assistance.

Transfer lockout operation has occured; transfer switch is disabled from automatic operation.

Open the disconnected source circuit breaker, then call your nearest ASI for assistance.

* These are factory settings. Refer to Group 5 Controller User’s Guide.

If the problem is isolated to circuits on the controller or the transfer switch, call your local ASCO Power Technologies sales office or ASI. In the United States, call 1–800–800–2726. Furnish the Serial No., Catalog No., & BOM

No. from the transfer switch nameplate.

2---2

A

alarm reset, 1–5, 2–2 auxiliary circuits, 1–2

C

cable lugs, 1–2 preparation, 1–2 catalog number, inside cover cleaning, 2–1 closed transition bypass, 1–5, 2–2 connections line, 1–1 controller, 1–1 disconnecting, 2–1 see Controller User’s Guide

E

electrical operation, 1–5 emergency source accepted light,

1–4 extended parallel time, 2---2

F

failure to synchronize, 2---2 frequency, generator, 2–2 functional test, 1–2, 1–3, 1–4, 1–5

G

ground, controller, 1–1

H

harness, 1–1 disconnect plugs, 2–1

HELP [email protected]

800–800–ASCO

INDEX

I

inspection, 2–1 installation, 1–1

L

labels, engine start contacts, 1–2 rating, cover lights, 1–4, 1–5 lubrication, 2–1

M

maintenance handle, 1–3 maintenance, preventive, 2–1 manual load transfer, 2–2 warning, 2–2 manual operation, 1–3 illustration of, 1–3 warning, 1–3

N

nameplate, cover normal source accepted light, 1–4

O

operation electrical, 1–5 manual, 1–3 illustration of, 1–3 warning, 1–3 optional accessories see Controller User’s Guide parts, 2–1

P

phase rotation check, 1–4 problem, 2–2

R

rating label, cover replacement parts, 2–1

S

settings see Controller User’s Guide

T

test, functional, 1–2, 1–3, 1–4, 1–5 time delays, 2–1 see Controller User’s Guide

Transfer Control selector switch

Retransfer Delay Bypass, 1–5

Transfer Test, 1–5

Transfer Switch Connected To

Emergency light, 1–5, 2–1

Transfer Switch Connected To

Normal light, 1–4, 2–1 transfer test, 1–5 transfer to emergency, 1–5 transfer to normal, 1–5, 2–1 trouble–shooting, 2–2

TS locked out, 2---2

V

voltage checks, 1–4 voltage, pickup and dropout settings see Controller User’s Guide

Printed in U.S.A.

Copyright 2010 ASCO Power Technologies, L.P.