Emerson 7ATB User Manual

Operator’s

7000 Series 7A T B

Automatic T ransfer &

Manual

G design 1000 through 4000 amp. sizes

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

WARNINGisusedinthismanualto
warn of possible personal injury.

CAUTIONisusedinthismanualto
warn of possible equipment damage.

Bypass–Isolation Switches

Refer to the outline and wiring drawings provided
with your 7000 Series ATB 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
7ATB.

Rating Label

Each 7000 Series 7ATB 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.

4000 amp. size

Nameplate

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

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

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

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

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

381333–132 F

Catalog Number Identification

G7ATB C 3 4000 N 5 C

Typical 7000 Series ATB catalog no. for overlapping
neutral, 3 pole, 4000 amp., 480 V, in Type 1 enclosure:

Status
Lights

&

Engine

Control

Bypass

Handle

Neutral

A –solid

B – switching
C – overlapping

blank – none

Phase Poles

2 –singleØ
3 –threeØ

Amperes Voltage Controller Enclosure

1000

1200

1600

2000

2600

3000

4000

A 115

B 120

C 208

D 220
E 230

F 240
G 277

H 380

J 400

K 415

L 440

M 460
N 480

P 550

Q 575

R 600

5 –standard
5X –if

accessories

ordered

C –type1

F –type3R

G –type4

L –type12

blank – open type

Transfer Contr ol

&Lights

Isolation

Handle

Group 5 Controller

Transfer Switch

G7ATB 4000 A with the lower doors open (transfer switch shown)

SECTION 1 INSTALLATION

The ASCO 7000 Series Automatic Transfer &
Bypass–Isolation Switch (ATB) consi sts 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.

Remove the Shipping Skid

Open the front lower door and remove the two front
lag screws securing the enclosure to t he wood skid.
Next remove the rear lower panel and remove the two
rear lag screws securing the enclosure to the wood skid.

Supporting Foundation

The supporting foundation for the enclosure must be
level and straight. Allow at least 35 inches in front of
the enclosure for draw out of the Transfer Switch.
Refer to the enclosure outline drawing included with
the ATB for all mounting details i ncluding 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 appropriate enclosure outline
drawing for specified cable entrance 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.

Remove Shipping Brackets / Angles

from the Transfer Switch

Open the lower front door(s). The Transfer Switch
carriage is secured to the frame for shipment. R em ov e
the three or four shipping brackets or L–angles (1 upper
left, 1 upper right, 1 lower right, or 2 lower on 4000 A).

To prevent serious damage, remove 3 shipping
angles from the transfer switch carriage. Do not
turn the Isolation Handle until they are removed!

Mounting

Refer to the enclosure outline drawing furnished with
this switch and mount the 7000 Series ATB according
to the details and instructions shown on the drawing.

remove 3 or 4 shipping brackets ( L–angles)

Figure 1-1. On 1000–3000 A remove three shipping

L–angles.

remove 2 upper shipping brackets

remove 2 lower
shipping brackets

Figure 1-2. 4000 A remove four shipping L–angles.

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