High-Speed Circuit Breakers Technical Parameters

Parameter name	Unit	High speed circuit breaker type
Parameter name	Unit	UR 26-81 (82)	UR 40-81 (82)	UR 46-81 (82)	UR 60-81 (82)	UR 80-81 (82)	UR 42-81 (82)	UR 40-64	UR 60-64
Arc chute	-	81 (82)						64
Main circuit current	-	Direct
Rated operating current in the cabinet	А	2600	4000	4600	6000	8000	4200	4000	6000
Rated voltage of main circuit	V	900 (1800)*						3600
Setting currents limits	kА	1,4-8,0	2,0-15,0		6,0-18,0	8,0-24,0	4,0-18,0	1,4-8,0	2,0-15,0
Breaking capacity in noninductive circuit: - rated	kА	125 (80)*					125 (100)	40	50
Mechanical strength without maintenance, cleaning and greasing (non-emergency trippings)	-	4x50000	8х25000		4х20000			4х50000	8х25000
Special inspection	-	Inspection after 250 overload trippings
Test voltage 50 Hz, 1 min	kV	12						15
Impulse test voltage at voltage surges 1,2/50 µs	kV	20			15(20)			30
Voltage of control coil, DC	V	24, 36, 48, 72, 96, 110, 220

* -Values, stated in brackets, correspond to parameters of Secheron high speed circuit breaker with arc chute 82