Electrolines Est.
P. O. Box. 942 Yanbu Saudi Arabia Tel: +966 4 3225418 Fax: +966 4 3222213 Al-Jubail: Tel: +966 3 3632967 Fax: +966 3 3612967

Automatic Transfer Switch
Where would you be without a constant flow of electrical power? We often take for granted that power will always be there when we need it. In reality, power failures are very common. And when the power goes out, your business suffers.
The answer is to install an Automatic Transfer Switch, commonly referred to as an ATS. An Automatic Transfer
Switch with built-in control logic monitors your normal
ASCO power supply and senses any interruptions. If the utility power was to fail, the ATS will automatically start the engine and then transfer the load to the backup generator after the generator has reached proper voltage and frequency. When the utility power has been restored the ATS will automatically switch the load back, and after a time delay shut the engine generator off. With an Automatic Transfer Switch you are protected 24 hours a day, seven days a week.
G
30 to 2000 amps in a compact design
G
Available to 480 volts AC, single or three phase
G
True double-throw, inherently interlocked construction
G
Mechanically held, electrically operated utilizing a reliable field-proven, single-solenoid operator
G
Contacts easily accessible for easy inspection and preventive maintenance
G
Supplied with switched or solid neutral termination
G
UL 1008 listed for total system loads
G
Complies with IEC
947-6-1
G
Meets National
Electric Code requirements
G
IP31, IP54, General purpose (Type 1),
Raintight (Type 3 R),
Weatherproof (Type 4) or Oil Tight (Type 12),
Enclosures source outages to delay all transfer switch and engine-starting signals
G
Transfer to emergency time delay -
Adjustable from 0 to 5 minutes for controlled timing of load transfer to emergency
G
Retransfer to normal time delay -
Adjustable to 30 minutes
G
5-minute unloaded running time delay for emergency generator cool down
G
Adjustable close differential voltage sensing on all phases of normal source
G
Pickup voltage is adjustable to 95% of nominal; drop-out is adjustable from 70 to
90% of nominal
G
Voltage and frequency sensing of emergency
G
Selectable for single or three phase operation,
50 or 60 Hz
G
Adjustable time delay to override momentary normal
G
Inphase monitor to transfer motor loads, without any intentional off time, to prevent inrush currents from exceeding normal starting levels
G
Selective load disconnect, doublethrow contact to operate at an adjustable 0 to 20 second time delay prior to transfer and reset 0 to 20 seconds after transfer
G
Engine exerciser to automatically test engine generator each week -
Includes control switch for testing with or without load
G
Switch position lights
G
Source availability lights
G
Engine exerciser switch with status light
G
Test switch
G
Time delay bypass switch
Electrolines Est.
P. O. Box. 942 Yanbu Saudi Arabia Tel: +966 4 3225418 Fax: +966 4 3222213 Al-Jubail: Tel: +966 3 3632967 Fax: +966 3 3612967

Automatic Transfer Switch
ASCO
G
Listed under UL 1008, CSA certified:
UL listed through 480 VAC;
CSA certified through 600 VAC
G
Accessories UL Recognized
G
Meets all automatic transfer switch requirements of:
NFPA 110, Emergency and Standby
Power Systems
NFPA 99, Essential Electrical Systems for Health Care Facilities
NFPA 70, National Electrical Code
G Sizes from 30 through 4000 amps.
G
Available to 600 VAC, 50 or 60 Hz.
G
Fully rated, opend or enclosed
G Rated for all classes of loads
G
100% tungsten load rating through 400 amps.
G
Designed for emergency and standby applications
G True double-throw, inherently interlocked construction
G
Mechanically-held, electrically-operated
G
Reliable single-solenoid operating mechanism
G
Contacts readily accessible for easy inspection and preventive maintenance
Product Poles Amperes
Voltage
Code
4,6,9, or X
Control
Panel
6 or 7 940 2, 3, or 4 continuous rating
(4 pole on
1000 - 2000 amp; for other amp sizes specify Acc. 28 switched neutral
- option.)
30, 70, 100,
150, 260,
400, 600,
800, 1000,
1200, 1600,
2000, 3000,
4000
(see chart below)
Use 6 for
1 phase, or
7 for
3 phase
Catalog Number example above is 940340097XC (X could be for Accessory 28).
G
Wide contact gaps for positive isolation of sources
G Compact design
G
Modular construction for maximum installation flexibility
G
Silver-plated copper bus
G
Segmented main contacts on all switches rated 600 amps and over
G
Main contacts are protected by arc tips or arcing contacts
G
High-speed transfer for all classes of loads
G
UL-listed Al-CU terminal lugs standard on switches rated 30-2000 amps (bus connections are provided on switches rated 3000 - 4000 amp)
G
Switch position indicating contacts and signal lights
G
To order an Series 940 Automatic
Transfer Switch, complete the following catalog number:
Options
Leave blank if no Acc.
ordered, or use X and list Acc.
needed.
Enclosure
Leave blank if open type, or use C for Type 1 or specify other Type.
3
3
3
3
208 Y / 120 V
4 Wire Wye 60 Hz
220 to 240 V
3 Wire Delta 60 Hz
480 Y / 277 V
4 Wire Wye 60 Hz or
440 to 480 V Delta other voltages
4
6
9
X
Electrolines Est.
P. O. Box. 942 Yanbu Saudi Arabia Tel: +966 4 3225418 Fax: +966 4 3222213 Al-Jubail: Tel: +966 3 3632967 Fax: +966 3 3612967

Automatic Transfer Switch
ASCO
G
Sizes from 150 through 4000 amps.
G
Incorporates series 940 Automatic
Transfer Switch
G
No momentary disconnection of neutral during transfer with unique overlapping neutral switching pole.
G Transfer switch can be tested eletrically without disturbing the load
G Bypass and automatic transfer switch contacts have same rating
G
Capable of switching load circuits from one source to the other under all conditions
G
Indicator lights show source availability and source feeding load
G Indicator lights show source availability and source feeding load
G
Source-to source bypass accomplished without reenergizing automatic transfer switch load terminals
G
Regenerative load voltages cannot backfeed automatic transfer switch during source-to-source bypass.
G
Listed under UL 1008, CSA certified:
UL listed through 480 VAC;
CSA certified through 600 VAC
G
Meets all automatic transfer switch requirements of:
NFPA 110, Emergency and Standby
Power Systems
NFPA 99, Essential Electrical Systems for Health Care Facilities
NFPA 70, National Electrical Code
G Automatic transfer switch is drawout design to facilitate maintenance
G
Space-saving design
G
Bypass contacts are in power circuit only during bypass and do not carry current continuously
G Bypass switch can be operated to either available source - even with the automatic transfer switch removed from service
G Rotary handle operation for bypassing and isolating transfer switch
G
No power cables to disconnect to remove automatic transfer switch
G
Visual indication of bypass-isolation switch position
G Fail-safe mechanical interlocks assure proper sequence of operation
G
Simple and unique design assures maximum reliability
G
Prominent and detailed instruction plate
G All power interconnections silver-plated copper bus bar. Eliminates costly field interconnections between automatic transfer switch and bypass switch
G UL-listed Al-CU terminal lugs standard on switches rated 150-2000 amps (bus connections are provided on switches rated 3000 - 4000 amp)
G
To order an Series 962 Automatic
Transfer & Bypass-Isolation Switch, complete the following catalog number:
Product Poles Amperes Voltage Code Control Panel Options
962 2, 3, or 4 continuous rating
4,6,9, or X 6 or 7
(4 pole on
1000 - 2000 amp; for other amp sizes specify Acc. 28 switched neutral
- option.)
150, 260,
400, 600,
800, 1000,
1200, 1600,
2000, 3000,
4000
(see chart below)
Use 6 for
1 phase, or
7 for
3 phase
Catalog Number example above is 962380097XC (X could be for Accessory 28).
Leave blank if no Acc.
ordered, or use X and list Acc.
needed.
3
3
3
3
208 Y / 120 V
4 Wire Wye 60 Hz
220 to 240 V
3 Wire Delta 60 Hz
480 Y / 277 V
4 Wire Wye 60 Hz or
440 to 480 V Delta other voltages
4
6
9
X
Enclosure
Leave blank if open type, or use C for Type 1 or specify other Type.
Electrolines Est.
P. O. Box. 942 Yanbu Saudi Arabia Tel: +966 4 3225418 Fax: +966 4 3222213 Al-Jubail: Tel: +966 3 3632967 Fax: +966 3 3612967

Automatic Transfer Switch
ASCO
G Sizes from 260 through 4000 amps.
G Available to 600VAC, 50 or 60 Hz,
250VDC.
G Fully rated, open or enclosed.
G Rated for all classes of loads.
G 100% tungsten load ratings through 400 amps.
G Designed for emergency and standby applications.
G
High interrupting capacity.
G
UL listed through 480VAC in accordance with UL 1008.
G Zero interruption of power during transfer and retransfer when conditions permit.
G
Actual overlap of sources during closed transition operation does not exceed
100 milliseconds.
G Conventional break-before-make “open transition” if one source fails.
G
Mechanically-held, electrically-operated.
G Reliable solenoid operating mechanism.
G Contact readily accessible for easy inspection and preventive maintenance.
G Wide contact gaps.
G
Compact designs.
G
Modular construction for maximum installation flexibility.
G
Silver-plated copper bus.
G Segmented contacts on all switches rated 600 amps and over.
G
Main contacts are protected by arc tips or arcing contacts.
G
High-speed transfer for all classes of loads.
G
UL-listed AL-CU terminal lugs.
G
All components designed for transfer switch service.
G
Switch position indicating contacts and signal lights.:
®
436
Product
Code
No. of
Poles
Continuous
Ampere Rating
2, 3 260 1200
400 1600
600 2000
800 3000
1000 4000
Voltage
Code
Voltage
2 Poles 3 Poles
Code Voltage Code
110 to 120V
1ø 2 Wire
60 Hz
208 to 240V
1ø 2 Wire or
60 Hz
440 to 480V
1ø 2 Wire or
1ø 3 Wire
60 Hz
Other
Voltages
3
6
9
X
208Y/120
4 Wire Wye
60 Hz
220 to 240V
3 Wire Delta
480Y/277
4 Wire Wye or
440 to 480V
Delta
60 Hz
Other
Voltages
4
6
9
X
Control
Panels
Group
Type Code
1-Phase 6
3-Phase 7
Options Enclosure
Leave Blank for No
Options.
“X”
Indicates
Options
List.
Leave Blank for Open
Type. “C” indicates
NEMA Type
1. Or Specify
Other Type
Required.
The catalog number for an ASCO 436, 3-pole, 400-amp, 480-volt, 4-wire, 60 Hz switch in a NEMA Type 1 enclosure is: 436340097C.
Switch
Rating
(amps)
260
400
600
800
1000
1200
1600
2000
3000
4000
Available Symmetrical Amperes RMS at 480 Volts AC
When Used with
Current-Limiting Fuses
WCR
Max. Fuse
Size (amps)
When Used with
Circuit Breaker
Circuit Breakers
WCR with Specific WCR with Any
Circuit Breaker
200,000
200,000
200,000
200,000
200,000
200,000
200,000
200,000
200,000
200,000
600
600
1200
1200
2000
2000
3000
6000
6000
6000
42,000
42,000
65,000
65,000
85,000
85,000
100,000
100,000
100,000
100,000
35,000
35,000
50,000
50,000
65,000
65,000
100,000
100,000
100,000
100,000
Electrolines Est.
P. O. Box. 942 Yanbu Saudi Arabia Tel: +966 4 3225418 Fax: +966 4 3222213 Al-Jubail: Tel: +966 3 3632967 Fax: +966 3 3612967