CV2 -

CV2

Type CV2 is of selector switch structure, a vacuum version of type CV on-load tap changer. Its mechanical backup contacts design introduces an innovative & practical concept to make both low maintenance and extreme reliability possible at the same time. Furthermore, it is the most economic solution for primarily-delta transformer up to 132kV system.

1	Max. rated through-current (A)		250			350				500
2	Rated frequency (Hz)		50 or 60
3	Number of poles		1	3	3	1	3	3		1	3	3
4	Connection		-	Y	D	-	Y	D		-	Y	D
5	Max. rated step voltage (V)	10 & 12 contacts	2000			2000-1500*				1500-1000*
6	Rated step capacity (kVA)	10 & 12 contacts	500			525				525
7	Short-circuit current test (kA)	Thermal (3s)	4.5			4.5				7.5
		Dynamic (Peak)	11.25			11.25				18.75
8	Max. Operating Positions		12 for linear							10 for linear
			23 for reversing or coarse/fine							19 for reversing or coarse/fine
9	Insulation to ground (kV)	Highest voltage for equipment Um	40.5			72.5			126		145
		Rated separate source AC withstand voltage (kV/50Hz,1min)	85			140			230		275
		Rated lightning impulse withstand voltage (kV,1.2/50μs)	225			350			550		650
10	Internal Insulation Level		Refer to Technical Data section 4.6
11	Mechanical life		Not less than 1,500,000 operations
12	Contact life		Not less than 600,000 operations
13	Oil compartment of diverter switch	Service pressure	0.03Mpa
		Leakage test	No leakage under 0.08Mpa for 24 hours
		Over pressure protection	Bursting cap busts at 300 ± 20%kPa
		Protection relay	Oil flow speed set at 1.0m/s ±10%
14	Motor drive unit		SHM-D or CMA7
15	Oil filter plant		ZXJY-1 / ZXJY-2 / ZXJY-3 according to requirement (Necessary when max. rated through current is 1000A and above or OLTC used for industrial applications)