WL Circuit Breaker selection and application guide
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Ratings for UL1066 Listed non-automatic switches
WL frame ratings Frame size 2 Frame size 3
800 - 2000A 3200 - 5000A
Rating Group L F
1
L F
Breaking capacity with external relay (kA RMS) 254VAC 100 20 100 40
50/60 Hz, instantaneous trip 508VAC 100 20 100 40
635VAC 85 20 85 40
Short-time current Icw (kA RMS) 0.5 sec. 65 20 100 40
1
Interrupt rating is 200kA based on fuse rating.
2
Do not apply switch or breaker rated at 635VAC to a system with fault current >85kA RMS.
Low Voltage Power Circuit Breaker
Ratings for UL1066 Listed (ANSI C37) breakers
1
2
2
2
2
2
2
2
2
2
2
2
WL frame ratings – Frame size 3 3200A 4000A 5000A
Rating Group M F H L M F H L M F
Interrupting current frame Ics 254VAC 150 150 85 100 150 200 85 100 150 200
(kAIR RMS) 50/60 Hz 508VAC 150 150 85 100 150 200 85 100 150 200
635VAC 85 100 85 85 85 200 85 85 85 200
Short-time current Icw (kA RMS) 0.5 sec. 100 100 85 100 100 40 85 100 100 40
Extended instantaneous protection 508VAC 150 150 85 100 150 200 85 100 150 200
rating (kA RMS) 635VAC 85 100 85 85 85 200 85 85 85 200
Close and latch rating (kA RMS) 100 100 85 100 100 40 85 100 100 40
Applicable rating plug range 800 - 3200A 800 - 4000A 800 - 5000 A
IEC 60-947-1 impulse withstand rating 8 primary /2.5 8 primary /2.5 8 primary /2.5
secondary connection secondary connection secondary connection
Mechanical make-time (ms) 35 35 35
Mechanical break-time (ms) 34 34 24
Electric close make-time (ms) 50 50 50
Electric trip/ UV break-time (ms) 40/73 40/73 40/73
Electric trip and reclose interval (ms) 80 80 80
Mechanical duty cycles (no maint.) 10,000 10,000 10,000
Electrical duty cycles (no maint) 10,000 10,000 10,000
Draw-out breaker efficiency (Watts loss at rated I
n) 700 1100 1650
Draw-out fused breaker efficiency (Watts loss at rated I
n) Consult factory Consult factory Consult Factory
Ambient operating temperature (ºC) w/o LCD -25 to 70 -25 to 70 -25 to 70
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