Winco ASCO-300-G User Manual
Operator’s
Manual
Series 300
Automatic Transfer Switches
G design, 1000 throug h 3000 amp. sizes
TABLE OF CONTENTS
section
INSTALLATION 1..........................
SEQUENCE OF OPERATION 2.............
TESTING & SERVICE 3....................
ADJUSTMENTS 4.........................
CONTROL FEATURES 5...................
INDEX back cover.........................
An experienced licensed electrician must install the ATS.
DANGER is used in this manual to warn of high
voltages capable of causing shock, burns, or death.
!
WARNINGisusedinthismanualtowarn
of possible personal injury.
!
CAUTIONisusedinthismanualtowarn
of possible equipment damage.
Refer to the outline and wi ring drawings provided
with ASCO Series 300 ATS for all installation details.
1000, 1200, 1600 amp. sizes
50 Hanover Road, Florham Park, New Jersey 07932–1591 USA
For sales or service call 1 800 800–2726 (ASCO) www.ascopower.com
In Canada: PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5L7
telephone 519 758–8450, fax 519 758–0876, for service call 1 888 234–2726 (ASCO) www.asco.ca
2000 amp. size
381333–122 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.
G300 3 2000 N 1 C
Catalog Number Identification
A typical Catalog Number is shown below with its
elements explained. The example is for a G–design
Series 300 ATS with switched neutral, 3 pole, 2000
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
1000
1200
1600
2000
2600
3000
C 208
D 220
E 230
F 240
H 380
J 400
K 415
L 440
M 460
N 480
P 550
1 –standard
1X –if
accessories
ordered
Q 575
R 600
* type 4 & 12 enclosures are available
only for 1000, 1200, & 1600 amp. sizes
terminal block TB for
engine start and switch
position contacts
C –type1
F –type3R
G –type4 *
L –type12 *
blank – open type
Controller
Transfer
Switch
power
connections
neutral
connections
membrane
controls
2000 amp. size in typical enclosure with location of customer connections
SECTION 1 INSTALLATION
ASCO Series 300 A u tom atic T ran sfer 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
Au tom atic Transfer Switches. All control features are UL
Component R ecog niz ed, which assures that AS CO
automatic transfer switches meet OSHA Safety
Requ irem ents and will be acceptable to electrical inspectors.
ASCOSeries 300 Automatic Transfer Switches are suitable
for emergencyand 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 – Optional
Standby Systems, NFPA 99 Health Care Facilities, and
NFPA 110 Emergency and Standby Power Systems.
Rating Label
Each automatic transfer switch contains a rating lab el 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.
Auxiliary Cable Box for 1000–2000 amp
Anauxiliary cablebox is required if the power cablesdo not
enter the enclosure directly adjacent to the terminal lugs
(for example, if all power cables enter the top or bottom).
Order ASCO part no. 609027 if needed.
!
Do not route the power cables along
thesidesoftheTransferSwitch.
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.
Testing Power Conductors
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 lagscrews (two in
front, two in rear) securing the 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 cablebendingspace 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.
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
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 connected, they
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 Serie s 300.
Make sure the lugs provided are suitable f or 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; 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.
1--1
Controller Ground
INSTALLATION (continued)
Harnesses
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.
Engine Starting Contacts
Customer connections for engine control contact and TS
auxiliary contacts c onnec tion s are located on terminal
block TB which is mounted on the front of the transfer
switch. Refer to wiring diagram provided with the Series
300 ATS and connect the engine start wires to the
appropriate terminals. See Figure 1–1 and T ab l e A.
Table A. Engine start connections.
When normal
source fails
Te r m i n a l s o n
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.
The transfer switch is connected to the left side of the
controller by a plug–in harness (two plugs).
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
TB Terminal Block
(field connections)
accepts wire range
22–12 AWG
FEATURE 7
closes to start
FEATURE 8
opens to start
Figure 1-1. Connections to engine starting contact
terminal block located on the Transfer Switch.
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 5–2)
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
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 automatic transfer switch. Note the control
features that are provided and review their operation
before proceeding.
1 – Manual Operation Te st
A detachable maintenance handle is provided on the frame
of the Transfer Switch for mainte nance purposes only
Manual operation of the transfer switchshould 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.
Table B. Maintenance handle positions.
ATS Position Indicators
E
Normal
N
E
Emergency
N
OPEN
upper contacts o pe n
CLOSED
lower contacts closed
CLOSED
upper contacts closed
OPEN
lower contacts open
Turn counterclockwise
to Emergency.
Turn clo c kw i s e
to Normal.
insert
slide hub
onto shaft
Figure 1-3. Maintenance handle.
1. After deenergizing both power sources, open the
enclosure door. Locate and remove the maintenance
handle and hub stored on the transfer switch frame.
.
Then install the hub onto the center operator shaft and
insert the handle firmly into the hole in the side of the
hub (spring fully compressed). See Figure 1–3 and 1–4
and Table B.
2. If the transfer switch is closed on Normal (window shows
CLOSED), grasp handle firmly and turn it counterclockwise. The transfer switch should operate smoothly
without binding. If it does not, check for shipping
damage or construc tion debris.
3. Turn the handle clockwise to return the transfer switch to
the Normal position. Observe that the window indicators
(left side) show the top shaft OPEN and the bottom shaft
CLOSED.
Note: If Normal and Emergency connections are
reversed this operation is also reversed.
4. Remove the maintenance handle and hub and store it on
the frame in the place provided.
!
Verify that the maintenance handle and hub
have been removed befo re proceeding!
handle
into hole
Grasp
handle
firmly
Emergency
contacts
window
indicators
OPEN or
CLOSED
Normal
contacts
contact position
indicators (left side)
Figure 1-4. Contact position indicators and maintenance handle operation.
Now continue to 2–VoltageCheckson next page.
counterclockwise DOWN
closes the Emergency
source contacts (upper)
and opens the Normal
source contacts (lower)
1--3
clockwise DOWN closes
the Normal source contacts
(lower) and opens the
Emergency source
contacts (upper)
INSTALLATION (continued)
Florham Park NJ 07932 USA
TRANSFER SWITCH TEST BYPASS TIME DELAY SET ENGINE EXERCISER
observe these lights
Press for 15 Seconds
Figure 1–5. Standard controls and indicators.
2–VoltageChecks
First check nameplate on transfer switch; rated voltage
mustbethesameasnormalandemergencylinevoltages.
!
Verify that the feeders have been
connected to the proper lugs.
Use extreme caution when using a meter
to measure voltages in the following
steps. Do not touch power terminals;
shock, burns, or death could result !
Perform steps 1 through 6 at t he right. Observe the status
lights. See Figure 1–5.
● Black circle means light is on.
❍ White circle means light is off.
* If necessary, adjust voltage regulator on the generator
according to the manufacturer’s recommendations. The
Automatic Transfer Switch will respond only to the rated
voltage specified on the Transfer Switch nameplate.
Press until light FLASHES
Close the normal source circuit
breaker. The Transfer Switch
Connected To Normal and the
1
Normal Source Available lights
should come on.
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres -
2
entatthetransferswitchnormal
source terminals.
Close the emergency source
circuit breaker. (Start generator,
if necessary.) The Transfer
3
Switch Connected To Normal
and the Emergency Source
Available lights should come on.
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres -
4
ent at the transfer switch emergency source terminals.*
Useaphaserotationmeterto
check phase rotation of emer-
5
gency source; it must be the
same
as the normal source.
C
B
A
Shut down the engine–generator , if applicable. The Emergen-
cy Source Accepted light should
go off. Then put the starting
6
control selector switch (on the
generator set) in the automatic
position. Close enclosure door.
Now continue to 3 – Electrical Operation on next page.
1--4
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