20 Functions and characteristics Circuit breakers and switch-disconnectors 0 NW08 to NW63 PB100768-38 Common characteristics Number of poles 3/4 Rated...
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Functions and characteristics
Circuit breakers and switch-disconnectors NW08 to NW63
0
PB100768-38
Common characteristics Number of poles Rated insulation voltage (V) Impulse withstand voltage (kV) Rated operational voltage (V AC 50/60 Hz) Suitability for isolation Degree of pollution
Ui Uimp Ue IEC 60947-2 IEC 60664-1
3/4 1000/1250 12 690/1150 4 (1000 V) / 3 (1250 V)
Basic circuit-breaker Circuit-breaker as per IEC 60947-2 at 40 °C / 50 °C (1)
Rated current (A) Rating of 4th pole (A) Sensor ratings (A)
PB100769-70
Type of circuit breaker Ultimate breaking capacity (kA rms) V AC 50/60 Hz
Icu
Rated service breaking capacity (kA rms) Utilisation category Rated short-time withstand current (kA rms) V AC 50/60 Hz Integrated instantaneous protection (kA peak ±10 %) Rated making capacity (kA peak) V AC 50/60 Hz
Ics
220/415/440 V 525 V 690 V 1150 V % Icu
Icw
1s 3s
Icm
220/415/440 V 525 V 690 V 1150 V
Break time (ms) between tripping order and arc extinction Closing time (ms)
Circuit-breaker as per NEMA AB1 Breaking capacity (kA) V AC 50/60 Hz
240/480 V 600 V
Unprotected circuit-breaker Tripping by shunt trip as per IEC 60947-2 Type of circuit breaker Ultimate breaking capacity (kA rms) V AC 50/60 Hz Rated service breaking capacity (kA rms) Rated short-time withstand current (kA rms)
Icu Ics Icw
220...690 V % Icu 1s 3s
Overload and short-circuit protection External protection relay: short-circuit protection, maximum delay: 350 ms (4) Rated making capacity (kA peak) V AC 50/60 Hz
Icm
220...690 V
Switch-disconnector as per IEC 60947-3 and Annex A Type of switch-disconnector Rated making capacity (kA peak) AC23A/AC3 category V AC 50/60 Hz
Icm
Rated short-time withstand current (kA rms) AC23A/AC3 category V AC 50/60 Hz
Icw
220...690 V 1150 V 0.5 s 1s 3s
Mechanical and electrical durability as per IEC 60947-2/3 at In/Ie Service life Mechanical with maintenance C/O cycles x 1000 without maintenance Type of circuit breaker Rated current In (A) C/O cycles x 1000 Electrical without maintenance IEC 60947-2
(1) 50 °C: rear vertical connected. Refer to temperature derating tables for other connection types. (2) See the current-limiting curves in the "additional characteristics" section. (3) Equipped with a trip unit with a making current of 90 kA peak. (4) External protection must comply with permissible thermal constraints of the circuit breaker (please consult us). No fault-trip indication by the SDE or the reset button. (5) Available for 480 V NEMA. (6) Suitable for motor control (direct-on-line starting).
20
Type of circuit breaker or switch-disconnector Rated operational current Ie (A) C/O cycles x 1000 Electrical without maintenance IEC 60947-3 Type of circuit breaker or switch-disconnector Rated operational current Ie (A) Motor power
C/O cycles x 1000 Electrical IEC 60947-3 Annex M/IEC 60947-4-1
without maintenance
440 V (5) 690 V 1150 V AC23A 440 V (5) 690 V AC3 (6) 380/415 V (kW) 440 V (5) (kW) 690 V (kW) 440/690 V (5)
