Emerson ASCO 7000 User Manual

Operator’s

7000 Series A T S

Automatic T ransfer Switches

Manual

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

WARNINGisusedinthismanualtowarn
of possible personal injury.

CAUTIONisusedinthismanualtowarn
of possible equipment damage.

D design, 30 throug h 230 A

Refer to the outline and wiring drawings provided
with your 7000 Series ATS for all installation and
connection details and accessories.

Refer to Group 5 Controller User’s Guide 381333–126
for ATS stat us display messages, t ime delays, pickup
& dropout settings, and adjustments.

Rating Label

Each Automatic Tran sfer Switch contains a rating label to
define the loads and fault circuit withstand/closing ratings.
Refer to the label on the Tr ansfer Switch for specific values.

Do not exceed the values on the rating label.
Exceeding the rating can cause personal injury
or serious equipment damage.

Nameplate

The Tran sfer Switch nameplate incl udes data for each
specific 7000 Series ATS. Use the switch only within the
limits shown on this nameplate. A typical Catalog Number
is shown on the next page with its elements explained.

An experienced licensed electrician must install the ATS.

TABLE OF CONTENTS

section-page

INSTALLATION 1-1........................

Mounting and Line Connections 1-1.........

Auxiliary Circuits and Harness 1-2...........

Engine Starting Contacts 1-2...............

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

TESTING & SERVICE 2-1..................

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

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

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

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

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

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

30--- 230 amp. size

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 [phone], fax [phone], for service call 1 888 234–2726 (ASCO) www.asco.ca

381333–229 D

design
prefix
letter

Catalog Number Identification

Typical 7000 Series 7ATS catalog no. for overlapping neutral, 3 pole, 150 amp, 480 V, in Type 1 enclosure:

D

Neutral

7ATS C 3 150 N 5 C

Phase Poles

Amperes Voltage Controller

Enclosure

A –solid

B –switched

C – overlapping

blank – none

load power
connections

2 –singleØ
3 –threeØ

Transfer Switch

30
70

100

150

200 **

230 **

** 200 and 230 amp.

limited to 480 volts

terminals for switch

position contacts

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

M –type 3R secure

N –type 4 secure
P –type 4X secure

Q –type 12 secure

blank – open type

transfer
control
&lights

emergency power
connections

maintenance

handle

(see WARNING

under Manual

Operation)

terminals for

engine start

contacts

normal power
connections

cable spacers
(see INSTALLATION)

Controller

150 amp. size in typical enclosure with location of customer connections

SECTION 1 INSTALLATION

The ASCO 7000 Series Automatic Transfer Switch (ATS)
is factory wired and tested. Field installation requires
mounting, connecting service cables, 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 switch for all
mounting details including 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 enclosure outline drawing for specified
area and location. Provide cable bending space and ½
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.

Mounting

Refer to the Outline and Mounting Diagram provided with
the A TS; it shows all mounting details and instructions.

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

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
defectiveorhavebeendamagedduringinstallation.

Connecting Power Conductors

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
switch. Makesurethelugsprovidedaresuitableforuse
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 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 cable is used, apply joint compound t o
conductors. Tighten cable lugs to the torque specified
on rating label.

Three cable spacers are included with 150, 200, & 230 A
transfer switches. When installing power cables, run the
cables through the cable spacers as shown in Figure 1-1.
Position the cable spacers within 1½ inches from the lugs.

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.

The controller is mounted on the cabinet door. An
add-on DIN rail is provided for some optional accesso­ries and is mounted below the controller on the door.

Line Connections

A Wiring Diagram is furnished with the ASCO 7000
Series ATS (separate from this manual). Refer to this
drawing. All wiring must be made in accordance with
the National Electrical Code and local codes.

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.

Testing Power Conductors

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

The cable spacers must be located as shown
for 150, 200, and 230 ampere transfer switches.

cable spacers

1 ½ inch approximate

cable spacer

Figure 1-1. Cable spacer for 150, 200, and 230 amp.

transfer switches.

Controller Ground

A grounding wire must be connected to the controller’s
lower left mounting stud. Because the controller is
mounted on the enclosure door, a conductive strap
must be used between the enclosure and the door. This
connection provides proper grounding which does not
rely upon the door hinges.

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