Installation and Operator’s Manual

100/200 Amp

Automatic Transfer Switch

reproduction

Questions?

Help is just a moment away!

Call: Transfer Switch Helpline

800-732-2989 Monday - Friday 8:00 AM - 5:00 PM Central Time

Copyright © Briggs & Stratton

All Rights Reserved.

80106998

Revision A

SERIES 185 Transfer Switches

D-design 100-200 A

Installation Manual

381333-497

6/2021

DANGER is used in this manual to warn of a hazard situation which, if not avoided, will result in death or serious injury.

Not

WARNING is used in this manual to warn of a

Table of Contents

Installation .................................................................. 2

Mounting

Line

Testing

Foundation ............................................ 2

2

Conductors ...................................... 2

Power Cables ....................................... 2 result death or serious injury.

CAUTION is used in this manual to warn of a result in minor or moderate injury.

Harnesses ................................................................ 3

Circuits ..................................................... 3 reproduction

..................... 3

4

Test

Preventive

Replacement Parts .................................................. 4

Manual Load Transfer ............................................. 4

Refer to User’s Guide 381333-471 for the Group A

Controller status display messages, time delays, pickup and dropout settings, and adjustments.

Refer to the outline and wiring drawings provided with the transfer switch for all installation and connection details and accessories.

Rating Label

Each 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 person injury or serious equipment damage.

An experienced licensed electrician must install the transfer switch.

Installation Manual SERIES 185

Installation

Testing Power Conductors

SERIES 185 Automatic Transfer Switches are factory wired and tested. Installation requires mounting, connecting power conductors, and connecting engine start and auxiliary control circuits (if required).

Supporting Foundation

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

Do not connect the power conductors 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.

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 1 inch minimum 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. according to details and instructions shown on the diagram.

Mounting for

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

Connecting Power Cables

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 transfer switch. Make sure that 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 transfer 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 reproduction

Three cable spacers are included with 150 and 200 ampere transfer switches. When installing power cables, run the cables through the cable spacers as shown in Figure 1. Position the cable spacers within

1½ inches from the lugs. switch.

Mount the ASCO ATS vertically to a rigid supporting structure. Level all mounting points by using flat washers behind the holes to avoid distortion of the switch.

Line Connections

Refer to the Wiring Diagram provided with the transfer switch. All wiring must be made in accordance with the

National Electrical Code and local codes.

The cable spacers must be located as shown for

150 and 200 ampere transfer switches. cable spacers

1 ½ inch approximate

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. cable spacer

Figure 1. Cable spacers for150 and 200 ampere transfer switches.

2 381333-497

SERIES 185 Installation Manual

Harnesses

The transfer switch is connected to the controller by a plug–in harness. Refer to the Wiring Diagram provided with the transfer switch.

Manual Operation Functional Test

A maintenance handle is provided on the transfer switch for maintenance purposes only. Manual operation of the transfer switch should be checked before it is energized (operated electrically).

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on transfer switch as shown on the wiring diagram provided with this SERIES 185 Automatic Transfer

Switch. Make the necessary auxiliary connections by referring to Control Features.

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

2. All power sources and the load must be deenergized

Not for before performing a manual operation. All power must be off!

Open the enclosure door. Locate the maintenance handle on the left side of the transfer switch. See Figure 2.

2. Grasp the attached maintenance handle and turn it with thumb and fingers as shown to manually operate the transfer switch. It should operate smoothly without any binding. If it does not, check for shipping damage or construction debris; do not energize the transfer switch!

3. Return the transfer switch to the Normal position. reproduction

Position of the transfer switch is indicated here. weight marked N (normal) and E (emergency) maintenance handle weight floating weight

With ALL POWER OFF grasp maintenance handle and turn it quickly with your thumb and fingers.

Figure 2. Maintenance handle and positions.

381333-497 3

Installation Manual SERIES 185

Testing & Service

Transfer Test

Operate the transfer switch at least once a month by following the instructions in the Group-A Controller manual.

Preventive Maintenance

Reasonable care in preventive maintenance will ensure high reliability and long life for the transfer switch.

An annual preventive maintenance program is recommended.

Replacement Parts

When ordering replacement parts provide the Serial

No., Bill of Material No. (BOM), and Catalog No. from the transfer switch nameplate.

In the US call 800-800-2726 (ASCO) or contact [email protected].

Manual Load Transfer

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

ASCO Services, Inc. is ASCO Power Technologies’ national service organization. They can be contacted at

1-800-800-2726 for information on preventive maintenance agreements

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

Deenergize both Normal & Emergency power sources before performing inspections!

Clean the enclosure.

Deenergize all sources, then brush and vacuum away any excessive dust accumulation. Remove moisture with a clean cloth.

Inspect the transfer switch contacts.

Deenergize all sources, then remove the transfer switch barriers and check the contact condition. The non-replaceable main contacts are designed to last the life of the transfer

1. Deenergize both the normal and emergency source

(open both circuit breakers).

2. Use the maintenance handle to manually operate

3. Close the enclosure door. If the transfer switch is in the emergency position, manually start the generator and then close the emergency source

.

the transfer switch to the opposite source. See page 3, Manual Operation . reproduction circuit breaker. switch. Reinstall the barriers carefully.

Maintain transfer switch lubrication.

Under normal operating conditions no further lubricating is required.

Renew factory lubrication if the transfer switch is subjected to severe dust, abnormal operating conditions, or if the TS coil is replaced.

Check all cable connections & retighten them.

Torque to values shown on the transfer switch label.

ASCO Power Technologies

160 Park Avenue

Florham Park, NJ 07932-1591 USA

Phone: 1 800 800-2726 (ASCO) for sales or service www.ascopower.com

©2021 ASCO Power Technologies. All Rights Reserved Printed in U.S.A

4 381333-497

Not for reproduction

Not for reproduction

Not for reproduction