Emerson 7000 User Manual 3

Operator’s

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pp

7000 Series Medium-Voltage

Automatic Transfer Switches

4.76, 15.0, 27 kV; 1200, 2000, 3000 ampere

DANGER

!

DANGER is used in this manual to warn of a
hazard 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 death or serious injury.

CAUTION is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in minor or moderate injury.

WARNING

!

CAUTION

!

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

Refer to the Group 5 Controller User’s Guide
381333-126 for ATS status display messages, time
dela

s, pickup & dropout settings, & adjustments.

ASCO 7000 Series Medium-Voltage Automatic Transfer
Switches (ATS) are designed to ANSI C37.20.2 standard
for metal-clad switchgear and are UL 1008A Listed.

Nameplate and Rating Label

The nameplate includes data for each specific automatic
transfer switch. Use the ATS only within the limits
shown on this nameplate. Each ATS has a rating label to
define the loads, interrupting, short-time, and close &
latch ratings. Refer to the label for specific values.

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

This equipment is designed for use with dangerous
levels of power from multiple sources. Additionally,
voltage transformers and standby control power
sources (i.e. station battery system, UPS) included in
the equipment must be disconnected when servicing
this equipment. Persons installing, servicing, and
operating this equipment must be trained, licensed
appropriately, and familiar with medium voltage
electrical power equipment and adhere to required
a

arel, protection, tools, controls, and procedures.

WARNING

!

Table of Contents

Catalog No., major components view...............i

INSTALLATION

Mounting, Connections ................................1-1

OPERATION

Energizing ATS after Installation..................2-1

Controller, Lock-out relay (optional)............. 2-2

Transfer Test ATS, ACTS, ADTS ..2-3, 2-4, 2-5

Typical 7000 Series MV ATS, 1200 A

50 Hanover Rd., Florham Park, NJ 07928 USA
For sales or service call 800-800-2726 (ASCO) www.ascopower.com

TROUBLESHOOTING

ATS, ACTS, ADTS.........................3-1, 3-2, 3-3

INDEX...............................................back page

381333-395

i Catalog Number 381333-395

g

(

)

(

Catalog Number Identification

A typical Catalog Number is shown below with its elements explained. The example is for a 7000
Series Automatic Transfer Switch, class A interrupting rating, automatic, open-transition transfer, dual­circuit breaker, 3 pole, 1200 ampere, 6.6 kV 60 Hz, in a Type 1 enclosure.

Fixed elements

Catalo

Number

Variable
elements

Interrupting

Rating

A = 25 kAIC
B = 40 kAIC
C = 50 kAIC
D = 16 kAIC

NOTE
Interrupting rating A (25 kAIC)
is not available for voltage
ratings below 5 kV.

Product Series

7 = 7000

Operation

Type

A = Automatic
N = Non-auto

Emergency Source
Circuit Breaker

Emergency source
Breaker Control
switch

Device Type

M = dual CB transfer

Poles

3 = 3 pole

Controller

5 = Group 5

A 7 A T M 0 3 1200 6 5 X C

Transition

Type

blank = Open
C = Closed
D = Delayed
S = Soft load

Construction

T = Transfer
(non-soft load)
L = Soft load
transfer
U = Service
entrance (Normal)
G = Service
entrance (Emerg)
P = Service
entrance (N & E)

Transfer Switch

CB SECTION

Neutral

Type

0 = None
A = Solid

Amperes

1200
2000
3000

CONTROL SECTION)

Voltage

T = 2.4 kV
U = 4.16 kV
V = 11 kV
W = 12.47 kV
X = 13.2 kV
Z = 14.4 kV
3 = 3.3 kV
6 = 6.6 kV
7 = 7.2 kV
8 = 10 kV
9 = 13.8 kV
O = Other

Controls

Accessories

X = yes
Z = special

Enclosure

Type

C = 1
M = 3R
(secure)

Voltage
transformer

Transfer control
& lights

Controller

Normal Source
Breaker Control
switch

Transfer Switch
control

Customer

Normal Source

terminal block

Circuit Breaker

Voltage
transformer

Typical 7000 Series MV ATS with location of major components (1200 amp shown)

381333-395 Installation 1-1

Installation

The ASCO 7000 Series Medium-Voltage Automatic
Transfer Switch (ATS) is factory wired and tested.

Refer to the manual from the manufacturer of
the metal-clad switchgear for section handling,
installation, power connections, and testing.

Supporting Structure

The supporting foundation for the enclosure must be
level and straight. Refer to the applicable enclosure
outline drawing included with the transfer switch for
all mounting details including door opening space.

Mounting

Refer to the outline and mounting diagram and mount
the automatic transfer switch according to details and
instructions shown on the diagram.

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

NOTICE

Testing Power Conductors

Engine-Generator Control
Connections

All customer connections, including the engine control
contact connections, are located on terminal block TB.
This terminal block is located on the interior left side
of the control section. Refer to the wiring diagram
provided with the automatic transfer switch. Connect
the engine start wires to the appropriate terminals. See
Figure 1-1 and Table A.

Table A. Engine-generator control contacts

When normal source fails TB terminals

contact closes TB1 and TB2
contact opens TB1 and TB3

engine­generator
control
contacts

1
2
3

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. 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
defective or have been damaged during installation.

Line Connections

Refer to the wiring diagram provided with the transfer
switch. All wiring must be made in accordance with
the National Electrical Code and local codes.

DANGER

!

De-energize all conductors, open all circuit
breakers, and rack out all voltage transformers
before making any connections. De-energize any
UPS, station battery system, or any similar
system providing standby control power. Be sure
that the Normal and Emergency line connections
are in proper phase rotation. Place the engine
generator starting control in the OFF position.
Make sure engine generator is not in operation.

Figure 1-1. Customer terminal block TB in controls section.

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate
terminals on terminal block TB as shown on the wiring
diagram provided with the automatic transfer switch.

2-1 Operation 381333-395

(

)

Configuration of Shipped ATS

CB SECTION) (CONTROL SECTION

The MV ATS is shipped with the circuit breakers and controls in
the following state:

ON CB SECTION(S) - Circuit Breakers, check these items

Emergency source

circuit breaker

control switch

▪ Normal source circuit breaker (CBN)
in the OPEN position with the closing spring discharged.

▪ Emergency source circuit breaker (CBE)
in the OPEN position with the closing spring discharged.

▪ Normal source circuit breaker control switch (53CBN)
in the TRIP position (green target displayed on control switch)

▪ Emergency source circuit breaker control switch (53CBE)
in the TRIP position (green target displayed on control switch)

Transfer Switch

control switch

ON CONTROL SECTION – Controls, check this item

▪ Transfer Switch Auto-Man selector switch (53AM)
in the MAN (manual) position.

Circuit breaker

position lights

green=CB open

red=CB closed

Breaker control

target indicator

green=tripped

red=closed

Figure 2-2. Control switches

Be sure to close both enclosure doors
before proceeding to prevent personal
injury in case of electrical system fault.

Normal source
circuit breaker
control switch

Figure 2-1. Location of control switches

WARNING

!

Energizing the Normal Source, Setting Automatic Operation Mode

After the MV ATS is installed, the Normal source can be energized. Then the controls can be set for automatic
(standby) operation. The Normal and Emergency sources must be available. Follow this procedure:

ON CONTROL SECTION – Controls, check these items

▪ The transfer control indicator lights Normal Source Accepted and TS Locked Out should be on.
▪ The controller display should show that the transfer switch is Locked Out.

ON CB SECTION(S) - Circuit Breakers, check these items

▪ Normal source circuit breaker control switch should indicate that the circuit breaker is OPEN (green light).
▪ Emergency source circuit breaker control switch should indicate that the circuit breaker is OPEN (green light).

Energizing procedure

1. On Control Section, turn the Transfer Switch Auto-Man selector switch to the AUTO (automatic) position.

2. On CB Section, turn the Normal source circuit breaker control switch to CLOSE position (red target window).

3. On CB Section, turn the Emergency source circuit breaker control switch to the CLOSE position (red target).

4. On Control Section, press the transfer controls Alarm Reset button. Normal source circuit breaker should close.
The Normal source CB control switch should indicate that the circuit breaker is CLOSED (red light).

The ATS is now in an automatic (standby) operating mode. Proceed to transfer test.