Winco ASCO-300-D User Manual
Operator’s
Automatic Transfer Switches
Manual
D desi gn , 30 through 230 amp. sizes
DANGER is used in this manual to warn of high
voltages capable of causing shock, burns, or death.
!
WARNINGisusedinthismanualto
warn of possible personal injury.
!
Series 300
Refer to the outline and wiring drawings provided with
your ASCO Series 300 ATS for all installation details.
ASCO Series 300 Automatic Transfer Switches (ATSs) are
Listed under Underwriters Laboratories UL 1008 Standard
for Safety for Automatic Transfer Switches. ASCO Series
300s are also Listed under CSA C22.2 No. 178 Standard for
Automatic Transfer Switches. All control features are UL
Component Recog nized, which assures that ASCO automatic
transfer switches meet OSHA Safety Requ irem ents and will
be acceptable to electrical inspectors.
CAUTIONisusedinthismanualtowarn
of possible equipment damage.
An experienced licensed electrician must install the ATS.
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 – L egally
Required Standby Systems, NEC Article 702 – Optional
Standby Systems, NFPA 99 Health Care Facilities, and
NFPA 110 Emergency and Standby Power Systems.
Rating Label
Each automatic trans fer switch con tains 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.
TABLE OF CONTENTS
section
INSTALLATION 1..........................
SEQUENCE OF OPERATION 2.............
TESTING & SERVICE 3....................
ADJUSTMENTS 4.........................
CONTROL FEATURES 5...................
30–200 amp. sizes
50 Hanover Road, Florham Park, New Jersey 07932–1591 USA
1 800 937–2726 (ASCO), for service call 1 800 800–2726 (ASCO) www.asco.com
ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3
telephone 519 758–8450, fax 519 758–0876, for service call 1 888 234–2726 (ASCO) www.asco.ca
INDEX back cover.........................
381333–228 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.
D 300 B 3 200 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, 200 amp, 480 V, in
a Type 1 enclosure:
Neutral
B –switched
C – overlapping
blank – solid
load power
connections
emergency power
connections
Phase Poles
2 –singleØ
3 –threeØ
terminals for switch
Amperes Voltage Controller Enclosure
30
70
104
150
200 *
* 200 amp. limited
to 480 volts
position contacts
A 115
B 120
C 208
D 220
E 230
F 240
H 380
J 400
K 415
L 440
M 460
N 480
P 550
Q 575
R 600
membrane
controls
1 –standard
1X –if
accessories
ordered
C –type1
F –type3R
G –type4
L –type12
blank – open type
Controller
Transfer
Switch
maintenance
handle
(see WARNING
under Manual
Operation)
terminals for
engine start
contacts
normal power
connections
cable spacers
(see INSTALLATION)
200 amp. size in typical enclosure with location of customer connections
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, 230 amp, 480 V, in a Type 1 enclosure:
D 300 B 3 230 N 1 C
Neutral
B –switched
C – overlapping
blank – solid
load power
connections
emergency power
connections
Phase Poles
2 –singleØ
3 –threeØ
Amperes Voltage Controller Enclosure
230 **
** 230 amp. limited
to 480 volts
terminals for switch
position contacts
A 115
B 120
C 208
D 220
E 230
F 240
H 380
J 400
K 415
L 440
M 460
N 480
1 –standard
1X –if
accessories
ordered
membrane
controls
C –type1
F –type3R
G –type4
L –type12
blank – open type
Controller
Transfer Switch
maintenance handle
(see WARNING under
Manual Operation)
terminals for
engine start contacts
normal power
connections
cable spacers
(see INSTALLATION)
230 amp. size in typical enclosure with location of customer connections
SECTION 1 INSTALLATION
Series 300 AutomaticTransfer Switchesare factory wired
and tested. Installation requires skid removal then
securing the enclosure to the supporting foundation.
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.
!
Protect the automatic transfer switch from
construction grit and metal chips to prevent
malfunction or shortened life of the ATS.
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.
Connecting Power Conductors
After the powercables have been tested, connect them to
the appropriate terminal lugs on the transfer switch as
shown on the wiring diagram provided wit h 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.
Three cable spacers are included with 150, 200, and 230
ampere transfer switches. When installing power cables,
run the cables through the cable spacers as shown in
Figure 1–1. Position cable spacers within 1½ inches from
lugs.
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.
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.
It is unnecessary to remove pole covers from the transfer
switch. If you do remove them, reinstall them carefully.
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.
they are
!
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 spacers for 150, 200, & 230 amp.
transfer switches.
1--1
INSTALLATION (continued)
Engine Starting Contacts
Controller Ground
Customer connections for engine control contact
connections are located on 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 1–2 and Table A.
Table A. Engine start connections.
When normal source
fails
Terminals on transfer
switch
contact closes TB14 and TB15
contact opens TB14 and TB16
ENGINE STARTING CONTACTS
( SHOWN DE–ENERGIZED )
TOP
STUD
MIDDLE
STUD
BOTTOM
STUD
14
TS
15
NR
16
NR
TB 14
TB 16
left side
of switch
TB 15
Figure 1–2. Engine starting contact label and
terminals located on the transfer switch.
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).
Auxiliary Circuits
Connect auxiliary circuit wires to appropriate terminals
on transfer switch 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.
Load Disconnect
Feature
Connections
(see Wiring Diagram
& refer to page 5–5
for DIP switch settings)
Connections to Controller for other Control Features
(located on bottom of Controller)
Programmable
Engine Exerciser
connection,
if provided
(refer to
page 5–2)
Remote Control Features Connections
(refer to the Wiring Diagram &
page 5–5 for DIP switch settings)
Each control contact must be suitable
for a 5 V DC low energy circuit.
for factory
use only
Figure 1–3. Input / output label on the Controller showing possible connections to the lower terminal block.
1--2
INSTALLATION (continued)
Functional Test
The Functional Test consists of three checks: manual
operation, voltage checks, and electrical operation.
!
Do these checks in the order presented to
avoid damaging the automatic transfer switch.
Read all instructions on the Wiring Diagram and labels
affixed to the automatictransfer switch. Note the control
features that are provided and review their operation
before proceeding.
1 – Manual Operation Te st
A maintenance handle is provided on the Transfer Switch
for maintenance purposes only
transfer switch should be checked before it is energized
(operated electrically).
!
Do not manually operate the transfer switch
until both power sources are disconnected:
open both circuit breakers.
1. After deenergizing both power sources, open the
enclosure door. Locate and the maintenance handle
on the left side of the transfer switch frame. See
Figure 1–4.
2. Grasp the attached maintenance handle and turn it
with thumb and fingers as shown to manually operate
it. The maintenance handle turns the opposite direction of the weight. Move it up or down as shown to
manually operate the transfer switch. It should operate
smoothly without any binding. If it does not, check for
shipping damage or construction debris.
3. Return the transfer switch to the Normal position.
Note: If Normal and Emergency connections are
reversed this operation is also reversed.
. Manual operation of the
Position of the transfer switch is indicated here
weight marked N (normal)
and E (emergency)
maintenance
handle
weight
floating
weight
With ALL POWER OFF grasp
maintenance handle and turn it
quickly with your thumb and fingers.
Figure 1–4. Maintenance handle and positions.
Now continue to 2–VoltageCheckson next page.
1--3
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