Operator`s manual

ManualsBrandsEmerson ManualsSwitch7ADTB

381333–195 A

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

telephone 519 758–8450, fax 519 758–0876, for service call 1 888 234–2726 (ASCO) www.asco.ca

Operator’s

Manual

7000 Seri es 7ADTB

Automatic Delayed–Transition Transfer

& Bypass–Isolation Switches

H des ig n 600 thro ug h 1200 amp .

DANGER is used in this manual to warn of high

voltages capable of cau si n g shock , burns, or death .

WARNINGisusedinthismanualtowarn

of possible personal injury.

CAUTIONisusedinthismanualtowarn

of possible equipment damage.

600–1200 amp. sizes

Refer to t he outline and wiring drawings provided

with your 7000 Series ADTB 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 exp erien c ed licensed elec t rician must in stall the

7ADTB.

Rating Label

Each 7000 Series 7ADTB contains a rating label to

define the loads and fault circuit withstand/closing

ratings. Refer to the label on the Transfer Switch for

spec ific values.

Do not exceed the values on the nameplate/

rating label. Exceeding the rating can cause

personal injury or serious equipment damage.

TABLE OF CONTENTS

section-page

INSTALLATION

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

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

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

Functional Test 1-2, 1-3, 1-4.................

TESTING & SERVICE

Transfer Test 2-1..........................

Preventive Maintenance 2-1................

Disconnecting the Controller 2-1............

Manual Load Transfer 2-2..................

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

BYPASSING & ISOLATING

Bypassing the ATS 3-1, 3-2.................

Isolating the A TS 3-3, 3-4...................

Return to Service 3-5, 3-6, 3-7...............

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

Summary of content (17 pages)

PAGE 1
Operator’s Manual 7000 Series 7ADTB Automatic Delayed–Transition Transfer & Bypass–Isolation Switches H design 600 through 1200 amp. 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. Refer to the outline and wiring drawings provided with your 7000 Series ADTB for all installation and connection details and accessories.
PAGE 2
Nameplate Catalog Number Identification The Transfer Switch nameplate includes data for each specific 7000 Series 7ADTB. Use the switch only within the limits shown on this nameplate. A typical Catalog Number is shown below with its elements explained. Typical 7000 Series 7ADTB catalog no.
PAGE 3
SECTION 1 INSTALLATION Testing Power Conductors ASCO 7000 Series Automatic Delayed–Transition Transfer & Bypass–Isolation Switches (7ADTBs) are factory wired and tested. Field installation requires mounting and connection of service cables, and auxiliary control circuits (if required). 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.
PAGE 4
INSTALLATION (continued) Engine Starting Contacts All customer connections, including the engine control contact connections, are located on terminal block TB which is mounted on the top right side of the enclosure. Refer to the wiring diagram provided with the automatic transfer switch and connect the engine start wires to the appropriate terminals. See Figure 1–1 and Table A. Table A. Engine start connections.
PAGE 5
INSTALLATION (continued) GREEN RED GREEN RED observe these lights AMBER Figure 1-2. Standard controls and indicators. Close the normal source circuit breaker. The Transfer Switch 1 Connected To Normal and the Normal Source Accepted lights should come on. Functional Test Read all instructions on the Wiring Diagrams and labels affixed to the 7ADTB. Note the control features that are provided and review their operation before proceeding.
PAGE 6
INSTALLATION (continued) GREEN RED GREEN RED operate this switch observe these lights AMBER Figure 1-3. Standard controls and indicators. Turn and hold Transfer Control switch clockwise to Transfer Test until the engine starts 1 and runs (within 15 sec.). The Emergency Source Accepted light should come on. 2 – Electrical Operation This procedure checks electrical operation of the ADTS. Close enclosure door before proceeding to prevent personal injury in case of electrical system fault.
PAGE 7
SECTION 2 TESTING & SERVICE TRANSFER TEST REPLACEMENT PARTS Test the Automatic Transfer Switch portion of the 7000 Series 7ADTB at least once a month. This procedure checks the electrical operation of the Transfer Switch and Controller. Put the engine–generator starting control (at the engine–generator set) in automatic mode. 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.
PAGE 8
TESTING & SERVICE (continued) TROUBLE-SHOOTING Note any optional accessories that may be furnished on the 7ADTB and review their operation. Refer to any separate drawings and/or instructions that may be packed with the 7ADTB. See Table B. Hazardous voltage capable of causing shock, burns, or death is used in this switch. Do not touch the power or load terminals of the bypass switch or transfer switch! Table B. Trouble-Shooting Checks.
PAGE 9
TESTING & SERVICE (continued) handle UP opens the Emergency source contacts frame UPPER SHAFT DOWN closes the Emergency source contacts shaft Figure 2–2. Maintenance handle operation for Emergency source contacts (upper shaft). handle UP closes the Normal source contacts frame LOWER SHAFT DOWN opens the Normal source contacts shaft Figure 2–3. Maintenance handle operation for Normal source contacts (lower shaft). Transfer Switch Position Table C. Maintenance handle positions.
PAGE 10
SECTION 3 BYPASSING & ISOLATING BYPASSING THE ATS* This procedure explains how to Bypass the closed transfer switch contacts. Bypassing is required before the Transfer Switch can be tested or isolated. The Bypass Switch Handle must be in the OPEN position (green window indicator) and the Isolation Handle must be in the CONN [connected] position (window indicator). The TS Connected light must be on. See Figures 3–1, 3–2, 3–3. You can only bypass to the same source that the Transfer Switch is connected.
PAGE 11
BYPASSING & ISOLATING To Bypass Normal Source* (Load connected to Normal Source) The Transfer Switch Connected To Normal light is on and Transfer Switch Connected To Emergency light is off. (Load connected to Emergency Source) The Transfer Switch Connected To Emergency light is on and Transfer Switch Connected To Normal light is off. Push in the handle and turn it counterclockwise.* Turn the handle clockwise.
PAGE 12
BYPASSING & ISOLATING ISOLATING THE ATS Isolating is required before any service work can be performed on the automatic transfer switch (ATS). Refer to Figures 3–9, 3–10, 3–11, and 3–12. Hazardous voltage capable of causing electrical shock, burns, or death; do not touch any control circuit terminals. 1. Bypass the closed automatic transfer switch contacts. See BYPASSING on pages 3–1 and 3–2. 2. Turn the Isolation Handle counterclockwise (approx. 8 turns) until window shows TEST.
PAGE 13
BYPASSING & ISOLATING 4. Open the lower enclosure door. Pull out both left and right side rails then use the two handles to roll out the transfer switch. It can be safely inspected in this position. The transfer switch can also be removed for easier maintenance operations. See Figure 3–13. (continued) To prevent the possibility of fatal electrical shocks and burns, bypass, isolate, and withdraw the transfer switch before working on it.
PAGE 14
BYPASSING & ISOLATING 5. Remove the movable contact cover. Use your thumb and fingers to squeeze the sides inward until the contact cover is released from the shaft clamp (both sides). Then remove the movable contact cover. See Figures 3–15 & 3–16. (continued) RETURN TO SERVICE 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). 1.
PAGE 15
BYPASSING & ISOLATING Do not close the isolation contacts unless the Transfer Switch (ATS) and Bypass Switch are in the same position! TS CONNECTED Middle amber light should come on. (continued) TS TEST TS ISOLATED 6. When the transfer switch is in the same position as the Bypass Switch handle, continue turning the Isolation Handle clockwise (about 8 turns) until the window shows CONN (connected). Bypass Switch Turn crank clockwise until window shows TEST.
PAGE 16
BYPASSING & ISOLATING RETURN TO SERVICE continued* (continued) Indicator shows yellow when ATS is bypassed to Emergency. 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 CONN position (window). See Figures 3–22, 3–23, and 3–24. Indicator shows green when the ATS is not bypassed.
PAGE 17
INDEX A auxiliary circuits, 1–2 B I indicators, contact position, 2–2, 2–3 inspection, 3–1 installation, 1–1 barriers, interphase, 3–4, 3–5 interlocked weights, 2–3 bypassing the ATS, 3–1, 3–2 interphase barriers, 3–4, 3–5 isolating the ATS, 3–3, 3–4 C L catalog number, 1–1 lifting device, transfer switch, 3–4 cleaning, 2–1 lights, 1–2, 1–3, 3–1, 3–2, 3–3 connections power, 1–1 load connected to emergency, 1–3 contact inspection, 3–4, 3–5 controller disconnecting, 2–1 see Controller User’s G