Emerson 7000 SERIES ATB- Manuals

Page 2 - Remove the Transfer Switch; This is; Mounting

SECTION 1 INSTALLATION 1--1 The ASCO 7000 Series Automatic Transfer & Bypass– Isolation Switch (ATB) consists of an upper bypass–isola- tion switch, a transfer switch, a monitoring and transfercontroller, and door–mounted controls. The ATB is factory wired and tested. Installation requires remov...

Page 3 - INSTALLATION; Connecting Power Conductors; Bus Connections; Bolt Diameter; Harnesses; Wiring Diagram

INSTALLATION (continued) 1--2 Connecting Power Conductors A Wiring Diagram is furnished with the ATB. All wiring must be made in accordance with the local codes. After the power cables have been tested, connect them to theappropriate terminal lugs on the Bypass Switch as shown on the wiring diagram ...

Page 4 - Install the Transfer Switch; BYPASS POS; Do not apply any electrical power to the ATB yet.; NORMAL; NOTE; Figure1–2. Solenoid latch interference tag.

INSTALLATION (continued) 1--3 Install the Transfer Switch After the enclosure is installed and power cables or bus connected to the Bypass Switch, the Transfer Switch carriage can be rolled in. The floor of the cabinet must befree of debris and clean. If necessary, use a vacuum cleaner. Make a thoro...

Page 5 - TS; Move ATS from DISCONNECTED To TEST Position; Inspection 2; Figure 1–6. Isolation contacts CONNECTED; Move ATS From TEST To CONNECTED Position; Inspection 3; Figure 1–7. Isolation contacts back in TEST position.; Move ATS From CONNECTED Back To TEST Position

INSTALLATION (continued) 1--4 Inspection 1 Do not force the Isolation Handle. Be sure that the sensing lead isolation contacts do not hit the male stabs head on, but rather slide on them. ! stab sensing lead contact isolation contacts IS TS Figure 1–5. Isolation contacts in TEST position. Move ATS f...

Page 6 - Automatic Transfer; Functional Test; Wiring Diagrams; Section 3; – Voltage Checks; Use extreme caution when using a meter to

INSTALLATION (continued) 1--5 Transfer Switch Connected To Normal Transfer Switch Connected To Emergency Normal Source Accepted Emergency Source Accepted Transfer Control Retransfer Delay Bypass Transfer Test HOLD FOR 15 SECONDS RED RED GREEN GREEN ( ) Automatic Transfer & Bypass–Isolation Switc...

Page 7 - – Manual Operation Test; CLOSED ON NORMAL; approximately 7 or 8; Do not manually operate the Transfer Switch; OPEN; position and the; DISCONNECTED; handle; Figure 1–10. Transfer Switch manual operator handle.

INSTALLATION (continued) 1--6 2 – Manual Operation Test This procedure will check the manual operation of the Bypass Switch, Isolation Switch, and Transfer Switch.Observe the lights on the Status Indicator panel. The Bypass Switch CLOSED ON NORMAL and the TEST lights should be on. See Figure 1–11. 1...

Page 8 - – Electrical Operation; Transfer Test; Isolation Handle

INSTALLATION (continued) 1--7 Transfer Switch Connected To Normal Transfer Switch Connected To Emergency Normal Source Accepted Emergency Source Accepted Transfer Control Retransfer Delay Bypass Transfer Test HOLD FOR 15 SECONDS RED RED GREEN GREEN ( ) Automatic Transfer & Bypass–Isolation Switc...

Page 9 - SECTION 2 TESTING & SERVICE; TRANSFER TEST; Test; PREVENTIVE MAINTENANCE; Return to Service

SECTION 2 TESTING & SERVICE 2--1 TRANSFER TEST 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. Put the engine–generator starting control (at the engine–generator set) in...

Page 10 - MANUAL LOAD TRANSFER

TESTING & SERVICE (continued) 2--2 TROUBLE-SHOOTING Note any optional accessories that may be furnished on the ATB and review their operation. Refer to any sepa- rate drawings and/or instructions that may be packed with the ATB. Hazardous voltage capable of causing shock, burns, or death is used...

Page 11 - SECTION 3 BYPASSING & ISOLATING; BYPASSING; enclosure door; Bypass–Isolation Switch is energized.; To Isolate the Automatic Transfer Switch

SECTION 3 BYPASSING & ISOLATING 3--1 BYPASSING This procedure explains how to Bypass the closed Automatic Transfer Switch contacts. Bypassing is re- quired before the ATS can be tested or isolated. The Bypass Switch must be in the AUTOMATIC POS (posi- tion) and the Isolation Handle must be in th...

Page 12 - BYPASSING & ISOLATING; TRANSFER SWITCH REMOVAL; TRANSFER SWITCH REINSTALLATION; TEST

BYPASSING & ISOLATING (continued) 3--2 TRANSFER SWITCH REMOVAL This procedure explains how to remove the Transfer Switch for inspection and maintenance. 1. Bypass and Isolate the Automatic Transfer Switch by carefully following directions on page 3–1. Be sure that the ATS POSITION DISCONNECTED l...

Page 13 - RETURN TO SERVICE; Close enclosure door to prevent personal; same; To change the position of transfer switch; Do not close the isolating contacts unless; Figure 3-8 Turn Bypass Handle to AUTOMATIC.

BYPASSING & ISOLATING (continued) 3--3 RETURN TO SERVICE This procedure explains how to return the Automatic Transfer Switch to service after inspection and maintenance. Observe the ATS POSITION lights on the STATUS INDICATOR panel. 1. Install the Transfer Switch into the enclosure. Carefully fo...

Page 14 - INDEX; Controller User’s Guide

INDEX Printed in U.S.A. A auxiliary circuits, 1–2 B bus connections, 1–2bypassing the ATS, 3–1 C catalog number, covercleaning, 2–1connections power, 1–2 controller disconnecting, 2–1 see Controller User’s Guide E electrical operation, 1–7Emergency Source Accepted light, 1–5 engine starting contacts...