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UL 1008 Withstand and Close-On Ratings at 480 Volts AC
Withstand and Close-On Ratings for all 7000 Series Products
(1)(2)
Notes: 1) All values are available symmetrical RMS amperes and tested in accordance with the withstand and close-on requirements of UL 1008.
See publication 1128 for more information on withstand and close-on ratings for ASCO transfer switches.
2) Application requirements may permit higher withstand ratings for certain size switches. Contact ASCO for guidance if available short circuit current
exceeds the WCR ratings shown.
3) “Any” breaker ratings are based on 1.5 cycles for 30 - 230 amp & 3 cycles for 260 - 4000 amps. Applicable to breakers with instantaneous trip elements.
4) Short time ratings are provided for applications involving breakers that do not have instantaneous trips for system coordination.
5) Short time rating applicable to transfer switch design only.
6) Optional front connected service limited to 85,000 amps for specific and any breaker rating.
Non-Automatic Transfer Switching
ASCO Non-Automatic Transfer Switches are electrically
operated units which are operated with manual control
switches mounted locally or at remote locations.
• Sizes from 30 through 4000 amperes.
• Microprocessor based controller provides for addition
of optional accessories.
• Controller prevents inadvertent operation under low
voltage conditions.
• Low control circuit operating currents allow for long
line runs between remotely mounted manual control
switches and the transfer switch.
• Source acceptability lights inform operator if sources
are available to accept load.
• Standard inphase monitor can be activated for
transferring motor loads.
Fig. 4: Three pole Non-Automatic,
electrically operated 400 ampere switch
shown in Type 1 enclosure.
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30
70, 100, 150, 200
230
260, 400
600, 800,
1000, 1200
1600, 2000
6
3000
4000
100,000
200,000
100,000
200,000
200,000
200,000
200,000
200,000
J
J
J
J
L
L
L
L
10,000
10,000
10,000
35,000
50,000
100,000
100,000
100,000
N/A
N/A
N/A
N/A
36,000
5
65,000
65,000
65,000
Short Time
Withstand
Ratings(4)
Short Time
Duration
(Cycles)
“Any” Breaker
(3) Rating
Specific Breaker
Rating
10,000
22,000
22,000
42,000
65,000
100,000
100,000
100,000
Max. Fuse Type
amps
types
60
200
300
600
1600
3000
4000
6000
Current - Limiting
Fuse Rating
Bypass Switches
Transfer Switches
Switch Rating (Amps)
7000 Series Power Switching Solutions
ASCO