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Power^IT MV Live Tank SF6 Circuit Breaker

General Characteristics

Circuit-Breaker on Column		OHB 24		OHB 36		OHB 40
Standards	IEC 62271-100	stop		stop		stop
Rated Voltage	U_r [kV]	24		36		40.5
Rated Insulation Voltage	U_s [kV]	24		36		40.5
Withstand Voltage at 50 Hz	U_d(1 min) [kV]	70 (dry)/ 60 (wet)		95 (dry)/ 80 (wet)		95 (dry)/ 80 (wet)
Impulse Withstand Voltage	U_p [kV]	150		200		200
Rated Frequency	f_r [Hz{	50-60		50-60		50-60
Rated Normal Current (40°C)	I_r [A]	1250	2500	1250	2500	1250	2500
Rated Breaking Capacity	I_sc [kA]	25	25	25	25	25	25
Rated Breaking Capacity	I_sc [kA]	31.5	31.5	31.5	31.5	31.5	31.5
Rated Short-Time Withstand Current (3 s)	I_k [kA]	25	25	25	25	25	25
Rated Short-Time Withstand Current (3 s)	I_k [kA]	31.5	31.5	31.5	31.5	31.5	31.5
Making Capacity	I_p [kA]	63	63	63	63	63	63
Making Capacity	I_p [kA]	80	80	80	80	80	80
Operating Sequence	(O-0, 3s-CO-15s-CO)	stop		stop		stop
Opening Time	[ms]	45 ± 10		45 ± 10		45 ± 10
Arcing Time	[ms]	10 - 15		10 - 15		10 - 15
Total Breaking Time	[ms]	55 - 60		55 - 60		55 - 60
Closing Time	[ms]	75 ± 10		75 ± 10		75 ± 10
Overall Dimensions	on frame
	H [mm]	3090 - 3840		3090 - 3840		3090 - 3840
	L [mm]	900		900		900
	P [mm]	686		686		686
Weight	[kg]	900		900		900
SF6 Gas Absolute Pressure	Rated Service Value [kPa]	380		380		550
Operating Temperature ¹	[°C]	-25... + 40		-25... + 40		-25... + 40
Tropicalisation	IEC: 60068-2-30, 721-2-1	stop		stop		stop
Electromagnetic Compatibility	IEC: 60694, 61000-6-2, 61000-6-4	stop		stop		stop
Solar Radiation	[W/m²	1000		1000		1000
Presence of Pollution	IEC 815 - table 1	Level III		Level III		Level III
Creepage Distance	[cm/kV]	2.5		2.5		2.75
Ice Coating	[mm]	10		10		10
Wind Speed	[mm/s]	34		34		34
Earthquake Resistance	[g]	0.3		0.3		0.3
Static Force on the Terminals	Longitudinal [N]	750		750		750
	Transversal [N]	500		500		500
	Vertical [N]	750		750		750