User`s guide

ManualsBrandsEmerson ManualsSwitch7ADTB

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

Sales or service call 800 800–2726 (ASCO) www.ascopower.com

381333–415 A

Installation

Manual

7000 Seri es 7ATB , 7ACTB , 7ADTB

G, Q , S, & U design 600–4000 A

Automatic Transfer & Bypass–Isolation Switches

DANGER is used in this manual to warn of a

hazardous situation which, if not avoided, will

result in death or serious injury.

WARNING is used in this manual to w arn of a

hazardous situation which, if not avoided, could

result in death or serious injury.

CAUTION is used in this m anual to warn of a

hazardous situation which, if not avoided, could

result in minor or moderate injury.

typical 4000 A

Refer to the outline and wiring drawi ngs provided

with your 7000 Series ATB for all installation and

connection details and accessories.

Refer to Group 5 Controller U ser’s Guide 381333–126

for ATS status display messages, time delays, pickup

& dropout settings, and adjustments.

An experienced l icensed electrician must install the

ATB.

Rating Label

Each 7000 Series ATB contains a rating label to define

the load and fault circ u it with st an d /clo sin g ratin g s. 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.

Namepl ate

The Transfer Switch nameplate includes data for each

specific 7000 Series ATB Use the switch only within

the limits shown on this nameplate. A typical Catalog

Number is shown below with its elements explained:

TABLE OF CONTENTS

section-page

INSTALLATION

Mounting 1-1.............................

Power Connections 1-2....................

Engine Starting & Auxiliary Circuits 1-2......

Functional Test 1-3, 1-4.....................

TESTING & SERVICE

Transfer Test & Preventive Maintenance 2-1..

Trouble-Shooting 2-2......................

BYPAS SING & ISOLATING

Bypassing the ATS 3-1....................

Isolating the ATS 3-2......................

Return to Service 3-4, 3-5...................

INDEX back cover.........................

Summary of content (16 pages)

PAGE 1
7000 Series 7ATB, 7ACTB, 7ADTB Installation G, Q, S, & U design 600–4000 A Manual Automatic Transfer & Bypass–Isolation Switches DANGER is used in this manual to warn of a hazardous situation which, if not avoided, will result in death or serious injury. WARNING is used in this manual to warn of a hazardous situation which, if not avoided, could result in death or serious injury.
PAGE 2
ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Installation Manual Typical 7000 Series G7ATB catalog no. for overlapping neutral, 3 pole, 4000 A, 480 V, in a Type 1 enclosure: G, Q, S, U 7 A TB C 3 4000 N 5 C Design prefix letter Transition Type A – open AC – closed AD – delayed Neutral Phase Poles A – solid B – switching C – overlapping Voltage Amperes 2 – single Ø 3 – three Ø blank – none Note: The ampere rating depends upon the design (G, Q, S, or U).
PAGE 3
SECTION 1 INSTALLATION ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Installation Manual The ASCO 7000 Series Automatic Transfer & Bypass– Isolation Switch (ATB) consists of an upper bypass–isolation switch, a lower transfer switch, a monitoring and transfer controller, and door–mounted controls. The ATB is factory wired and tested. Installation requires removal of the shipping skid then securing the enclosure to the supporting foundation.
PAGE 4
INSTALLATION (continued) Installation Manual ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Bus Connections 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. If bus connection is used, use SAE grade 5 hardware to connect bus to appropriate terminal plates on bypass switching device.
PAGE 5
INSTALLATION (continued) ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Installation Manual Close the normal source circuit breaker. The Transfer Switch 1 Connected To Normal and the Normal Source Accepted lights should come on. Use an accurate voltmeter to check phase to phase and 2 phase to neutral voltages present at the transfer switch normal source terminals. observe these lights Close the emergency source circuit breaker. Turn the Engine Control switch to Run to start 3 the generator.
PAGE 6
INSTALLATION (continued) Installation Manual ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB 7ACTB alarm lights (see troubleshooting) 7ACTB buttons 7ADTB light is on when load is disconnected observe these lights operate this switch Figure 1-4. Standard controls and indicators. Figure 1-5. 7ACTB controls. The Transfer Switch Connected to 1 Normal and Normal Source Accepted lights should be on. Figure 1-6. 7ADTB controls Load Disconnect Active (Transfer Test continued from page 1–3) 1.
PAGE 7
SECTION 2 TESTING & SERVICE ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Installation Manual TRANSFER TEST REPLACEMENT PARTS Test the Automatic Transfer Switch portion of the 7000 Series ATB at least once a month. This procedure checks the electrical operation of the Transfer Switch and Controller. Turn the Engine Control switch to Auto and put the engine–generator starting control (at the engine–generator set) in automatic mode.
PAGE 8
TESTING & SERVICE (continued) Installation Manual ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB TROUBLESHOOTING Note any optional accessories that may be furnished on the ATB and review their operation. Refer to any separate drawings and/or instructions that may be packed with the ATB. Table B. Trouble-Shooting Checks. PROBLEM Engine–generator set does not start when the Transfer Control switch is turned and held in Transfer Test position or when normal source fails.
PAGE 9
SECTION 3 BYPASSING & ISOLATING ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Installation Manual BYPASSING THE ATS* NOTICE This procedure explains how to Bypass the closed automatic transfer switch contacts. Bypassing is required before the ATS can be tested or isolated. The Bypass Handle must be in the OPEN position (green indicator) and the Isolation Handle must be in the CLOSED position (window). See Figures 3–1, 3–2, and 3–3. You can only bypass to the same source that the Transfer Switch is connected.
PAGE 10
Installation Manual BYPASSING & ISOLATING (continued) ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB ISOLATING THE ATS Isolating is required before any service work can be performed on the automatic transfer switch (ATS). Refer to Figures 3–4, 3–5, 3–6, 3–7a, and 3–7b. position window CONN TEST ISOLATE 1. Bypass the closed automatic transfer switch contacts. See BYPASSING on page 3–1. NOTICE unfold crank Align the position indicator. Do not leave the handle in an intermediate position. 2.
PAGE 11
BYPASSING & ISOLATING (continued) ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB Installation Manual grasp two handles locking pin with clevis pin rail support carriage left support leg locking pin with clevis pin adjust length to touch floor right support leg 4000 A transfer switch draw–out procedure adjust length to touch floor 1. Bypass and Isolate the ATS, then open both lower doors. 2. Pull out the rail support carriage all the way. 3.
PAGE 12
Installation Manual BYPASSING & ISOLATING (continued) ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB RETURN TO SERVICE NOTICE This procedure explains how to return the automatic transfer switch (ATS) to service after inspection and maintenance. Observe the Bypass Switch Position indicator and lights). Refer to Figures 3–7 through 3–10. Solenoid interlock prevents closing the isolation contacts until the ATS is in the same position as the Bypass Switch. 1.
PAGE 13
BYPASSING & ISOLATING (continued) ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB RETURN TO SERVICE continued* This procedure explains how to return the Bypass Switch Handle to the OPEN position. The Bypass Handle must be in the CLOSED position (yellow indicator on NORMAL or EMERGENCY) and the Isolation Handle must be in the TEST position (window). If the handles are not in these positions, refer to Return to Service on page 3–3. See Figures 3–11, 3–12, and 3–13.
PAGE 14
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PAGE 16
INDEX ASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB A Installation Manual H R Alarm Reset pushbutton, 1–4, 2–2 harness, 1–2 rating label, cover ASI is ASCO Services Inc. customercare@asco.com 800–800–2726(ASCO) HELP customercare@asco.