Air circuit breaker ACB-67

Air circuit breakers ACB-67 are designed to conduct current in normal mode and disconnect current during short circuits, overloads, unacceptable voltage drops, as well as for operational switching on and off of electrical circuits. The circuit breakers are designed for operation in electrical installations with a rated voltage of up to 660 V AC at a frequency of 50 and 60 Hz and a rated current of up to 3200 A. They are available in fixed and withdrawable versions and are equipped with a mechanical interlock mechanism.

The circuit breakers are equipped with high-precision programmable control units with electronic trip units.

Download PDF drawing — ACB-67

Technical specifications:

Type	Version	up to 1600	over 1600 A
Rated ultimate short-circuit breaking capacity Icu, (kA)	380V	80	100
Rated service short-circuit breaking capacity Ics, (kA)	380V	50	80
Rated short-circuit making capacity Icm, (kA)	380V	176	220
Rated short-time withstand current Icw (kA) 1 s.		50	65
Rated currents of maximum electronic trip units (In), A		630A, 800A, 1000A, 1250A, 1600A	2000A, 2500A, 3200A
Rated operational voltage (Ue), V		380	380
Rated frequency, Hz		50	50
Rated insulation voltage Ui (V)		1000	1000
Breaking time		23-32 ms	23-32 ms
Control unit		yes	yes
Endurance, number of CO cycles	Number of operating cycles corresponding to rated operational current	500	500
Endurance, number of CO cycles	Mechanical endurance	10000	10000
Overall dimensions, mm	Withdrawable version	439х375х421	439х435х421
Overall dimensions, mm	Fixed version	402х366х290	402х426х290
Maximum	Withdrawable version	90	120
Maximum	Fixed version	48	55

Overall and mounting dimensions

In withdrawable version for currents up to 1600 A

In withdrawable version for currents up to 3200 A

In fixed version for currents up to 1600 A

In fixed version for currents up to 3200 A

Download PDF drawing — ACB-67