Winco ASCO-300-H User Manual

Operator’s

Manual

Series 300

Automatic Transfer Switches

H–desi g n 600 throu gh 1200 amps

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.

An experienced licensed electrician must install the A TS.

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

TABLE OF CONTENTS

section

INSTALLATION 1..........................

SEQUENCE OF OPERATION 2.............

TESTING & SERVICE 3....................

ADJUSTMENTS 4.........................

CONTROL FEATURES 5...................

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

1200 amp. size600, 800, 1000 amp. sizes

381333–201 D

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
ATS with switched neutral, 3 pole, 600 amp, 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

L 440

M 460
N 480

P 550

Q 575

R 600

1 –standard

1X –if

accessories

ordered

* available 600 – 1000 amp. sizes only

C –type1

F –type3R

G –type4 *

L –type12 *

blank – open type

K 415

Controller

membrane

controls

Transfer

Switch

terminal block TB

for engine start

and switch

position contacts

power

connections

neutral

connections

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

ASCO Series 300 Automatic Transfer Switches (ATSs) are
Listed under Underwriters Laboratories UL 1008 Standard
for Safety for Automatic Transfer Switches. All control
features are UL Component Recognized, which assures that
ASCO automatic transfer switches meet OSHA Safety
Requ irem ents and will be acceptable to electrical inspectors.

ASCO Series 300 Automatic Transfer Switches are suitable
for emergency and standby system applications. They meet
emergency system rating requirements as defined in
National Electrical Code (NEC) Article 700 and UL 1008.
Also, they are suitable for the requirements of NEC Article
517 – Health Care Facilities, NEC Article 701 – Legally
Required Standby Systems, NEC Article 702 – Optiona l

neutral

connections

power

connections

Standby Systems, NFPA 99 Health Care Facilities, and
NFPA 110 Emergency and Standby Power Systems.

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.

Controller

Transfer

Switch

terminal block TB

for engine start

and switch

position contacts

power

connections

neutral

connections

membrane

controls

800 and 1000 amp. size 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 amp. 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 i n 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 drawingfor specifiedarea
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.

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
connected, they should be tested to verify that they are
not defective or have been damaged during installation.

!

Protect the automatic transfer switch from

construction grit and metal chips to prevent

malfunction or shortened life of the ATS.

they are

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. M ake sure the lugs provided are suitable for use 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 Series 300. Be careful
when stripping insulation from the cables; avoi d 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 connections 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 connect the engine start wires to
the appropriate terminals. See Figure 1–1 and Table A.

TableA.Enginestart

connections.

When normal

source fails

Te r m i n a 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 Features.

Connections to Controller
for other Control Features

(located on bottom of Controller)

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

Figure 1-1. Engine start and auxiliary circuit

terminal block TB located on the transfer switch.

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)

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