Emerson 300 User Manual 2

Operator’s

Manual

DANGER is used in this manual to warn of a
hazardous 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 in 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.

H–desi g n, 600 throu gh 1200 A

Series 300

Automatic Transfer Switches

Refer to the outline and wiring drawings provided with
your ASCO Series 300 ATS for all installation details.

Rating Label

Each automatic transfer switch 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.

An experienced licensed electrician must install the
Automatic Transfer Switch (ATS).

TABLE OF CONTENTS

section-page

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

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

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

Input / Output Label 1-2....................

Functional Test 1-3, 1-4, 1-5.................

SEQUENCE OF OPERATION 2-1...........

TESTING & SERVICE 3-1..................

Preventive Maintenance 3-1................

Transfer Test 3-1..........................

Disconnecting the Controller 3-1............

Manual Load Transfer 3-2..................

Trouble-Shooting 3-2......................

ADJUSTMENTS 4-1.......................

Time Delay and Sensor Adjustments 4-1.....

How to Change a Setting 4-2...............

CONTROL FEATURES 5-1.................

Engine Exercisers 5-1, 5-2, 5-3..............

Motor Load Transfer 5-4...................

Load Disconnect & Remote Control 5-4......

INDEX back of manual.....................

600, 800, 1000 A sizes

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

381333–201 G

Nameplate

The Transfer Switch nameplate includes data for
each specific ASCO Series 300 ATS. Use the ATS
only within the limits shown on this nameplate.

H 300 B 3 600 N 1 C

Catalog Number Identification

A typical Catalog Number is shown below with its
elements explained. The example is for a Series 300
ATSwithswitchedneutral,3pole,600ampere,
480 V, in a Type 1 enclosure:

B –switched
C – overlapping

blank – solid

neutral

connections

power

connections

Neutral

Phase Poles

2 –singleØ
3 –threeØ

Amperes Voltage Controller Enclosure

600

800
1000

1200

C 208

D 220
E 230

F 240

H 380

J 400

K 415

L 440

M 460
N 480

Q 575

R 600

1 –standard

1X –if

accessories

ordered

* available 600 – 1000 A sizes only

C –type1

F –type3R

G –type4 *

L –type12 *

blank – open type

Controller

membrane

controls

Transfer

Switch

terminal block TB

for engine start

and switch

position contacts

power

connections

neutral

connections

600 ampere size in typical enclosure with location of customer connections

neutral

connections

power

connections

Transfer

Switch

terminal block TB

for engine start

and switch

position contacts

Controller

membrane

controls

power

connections

neutral

connections

800 and 1000 ampere sizes in typical enclosure with location of customer connections

neutral

connections

power

connections

Transfer

Switch

Controller

membrane

controls

terminal block TB

for engine start

and switch

position contacts

power

connections

neutral

connections

1200 ampere size in typical enclosure with location of customer connections

SECTION 1 INSTALLATION

Series 300 Automatic Transfer Switches are factory
wired and tested. Installation requires skid removal
then securing the enclosure to the supporting
foundation.

Remove the Shipping Skid

Open the front door and remove the four lag screws (2
in front, 2 in rear) securing enclosure to the wood skid.

Supporting Foundation

The supporting foundation for the enclosure must be
level and straight. Refer to the applicable enclosure
outline drawing included with the Series 300 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
spaceandclearancetolivemetalparts. Whena
concrete floor is poured, use interlocking conduit
spacer caps or a wood or metal template to maintain
proper conduit alignment.

Mounting

Refer to the applicable enclosure outline drawing
furnished with this switch and mount the Series 300
according to details and instructions shown on diagram.

Testing Power Conductors

Do not connect the power conductors to the ASCO
Series 300 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
verify that they are not defective or have been
damaged during installation.

they are connected, they should be tested to

NOTICE

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

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 this
Series 300. Make sure the lugs provided are suitable
for use with the cables being installed. Standard
terminal lugs are solderless screw type and will accept
thewiresizeslistedonthedrawingsprovidedwiththe
Series 300. 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 to conductors. Tighten cable lugs to the
torque specified on rating label.

Line Connections

Refer to the Wiring Diagram provided with your Series
300 ATS. All wiring must be made in accordance with
the National Electrical Code and local codes.

It is unnecessary to remove pole covers from the
transfer switch. If you do remove them, reinstall them
carefully.

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.

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.

Harnesses

The transfer switch is connected to the left side of the
controller by a plug–in harness (two plugs).

1 --- 1

INSTALLATION (continued)

Engine Starting Contacts

Customer connections for engine control contact and
TS auxiliary contacts connec tion s are located on
terminal block TB which is mounted on the front lower
left of the transfer switch. Refer to wiring diagram
provided with the Series 300 A TS and connec t the
engine start wires to the appropr iate terminals. See
Figure 1–1 and Table A.

Table A. Engine s tart connections.

When normal

source fails

Te r m i na l s

on transfer

switch

contact closes TB1 and TB2
contact opens TB1 and TB3

Auxiliary Circuits

Connect auxiliary circuit wires to
appropriate terminals on transfer
switch terminal block TB as shown
on the wiring diagram provided
with this Series 300 Automatic
Transfer Switch. Make the neces­sary auxiliary connections by
referring to Section 5, Control
Fea tures.

COMMON

FEATURE 7

closes to start

FEATURE 8

opens to start

COMMON

FEATURE 14B

closed o n emergency

FEATURE 14A

closed on normal

COMMON

FEATURE 14BA

closed o n emergency

FEATURE 14AA

closed on normal

terminal block for engine start and

auxiliary circuit connections

left side of

transfer switch

Engine Starting

Signals

5amps,32VDC

5ampsresistive28VDC

or 120 V AC max.

TS Auxiliary Contacts

Feature 14A & 14B

10 amps, 32 V DC

10 amps 250 V AC

general purpose

Optional

TS Auxiliary Contacts

Feature 14AA & 14BA

10 amps, 32 V DC
10 amps 250 V AC

general purpose

Connections to Controller
for other Control Features

(located on bottom of Controller)

Load Disconnect

Feature

Connections

(see Wiring Diagram

& refer to page 5–4

for DIP switch settings)

Programmable

Engine Exerciser

connection,

if provided

(refer to

page 5–3)

Figure 1-1. Engine start and auxiliary circuit

terminal block TB located on the transfer switch.

Remote Control Features Connections

(refer to the Wiring Diagram &

page 5–4 for DIP switch settings)

Each control contact must be suitable

for a 5 V DC low energy circuit.

for factory

use only

Figure 1-2. Input / output label on the Controller showing possible connections to the lower terminal block.

1 --- 2