Specifications

Product Type	Fuse switch disconnector
Brand	ABB
Series	OS250B
Application	Isolation and protection in low-voltage distribution systems (industrial/commercial feeders, motor circuits)
Max. Rated Operation AC Voltage (Ue)	690 V AC
Position of Line Terminals	Top in / Bottom out or reverse
Rated Current (In)	250 A
Rated Impulse Withstand Voltage (Uimp)	12 kV
Rated Insulation Voltage (Ui)	1000 V
Rated Operating Voltage	690 V AC
Rated Operation Power at AC-23, 400 V	140 kW
Rated Operational Current AC21-A (Ie)	250 A
Rated Operational Current AC22-A (Ie)	250 A
Rated Operational Current AC23-A (Ie)	250 A
Rated Permanent Current (Iu)	250 A
Rated Permanent Current at AC-21, 400 V	250 A
Rated Short Time Withstand Current (Icw)	8 kA (1 s)
Power Loss	17 W
Rated Frequency	50 / 60 Hz
Fuse Size	B1-B3
Mechanical Life	~16,000 operations
No. of Poles	3P
Housing Material	Reinforced thermoplastic
Padlock Locking	Yes (OFF position)
Depth	154 mm
Height	193 mm
Weight	4.1 kg
Width	208 mm
Rated Surrounding Temperature without Derating	40 °C
Pollution Degree	3
Storage Temperature	-40 °C to +70 °C
Operating Temperature	-25 °C to +55 °C
IP Rating	IP20
Standards and Approvals	IEC 60947-3, CE, RoHS

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