420kv Outdoor Sf6 Insulating Circuit Breaker with Hydraulic Spring Mechanism

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Speed: High-Speed Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
• Certification: ISO9001-2000
• Transport Package: 3pole/Pk
• Model NO.: LW25
• Specification: 400KV
• Trademark: HEMG
• Origin: China
• Production Capacity: 10000

Product Description

SCHEDULE  F
No.	Description		Particulars		OFFER
	400KV CIRCUIT BREAKER
1	Normal current rating	A	2500		2500
2	Fault rating	kA	100		100
2.1	Making current	kAp	40		40
2.2	Breaking current under out of phase conditions	kA	10		10
2.3	Maximun overvoltage factor on any switching duty	pu	< 2.5		1.05
3	Operating sequence
3.1	Normal		0-10s-CO-3min-CO		O-10S-CO-3MIN-CO
3.2	Auto reclosing single phase		0-0.3s-CO-3min-CO		O-0.3S-CO-3MIN-CO
3.3	Delayed three phase auto reclose cycle adjustable dead time range	ms	2-30		2-30MS
3.4	High speed single phase auto reclose cycle adjustable dead time range	s	0.3-2.0		0.3-2.0
3.5	Number of closing operations under out of synchronous conditions	pu	2		2
4	Transient recovery voltage		-
4.1	First phase to clear factor	pu	1.3		1.3
4.2	Surge impedance for short line fault test	ohms	450		450
4.3	Minimum voltage to earth when switching capacitive currents,( 1.2 times rated phase to earth voltage )	kV	291		291
4.4	Voltage across circuit breaker under out of phase
	switching conditions	pu	2		2
5	Electro mechanical performance
5.1	Maximum total break time throughout complete rating ,
	ie trip coil initiation to final arc extinction (applicable) only to 100% rating for oil break circuit breakers )	ms	50		50
5.2	Maximum time interval between closure of first and last phase of three phase circuit breakers	ms	3		3
5.3	Maximum time interval between closure of interrupters of one phase of the circuit breaker	ms	2		3
5.4	Maximum time interval between opening of first and last phase of three phase circuit breaker	ms	3		3
5.5	Maximum time interval between opening of interrupters	ms	2		2
6	Insulation level ( IEC 694 )
6.1*	Lightning impulse withstand ( 1.2/50 wave ) positive
	and negative
	a. To earth , closed contacts	-kVp	1425		1425
	b. Across , open contacts	-kVp	1665		1665
6.2*	Switching impulse withstand ( 250/2500 wave )- positive and negative                                  Dry / wet
	a. To earth , closed contacts	-kVp	1050		1050
	b. Across , open contacts	-kVp	1245		1245
6.3*	Power frequency withstand                         Dry / wet
	a. To earth , closed contacts - 1 minute	kV	520		520
	b. Across , open contacts - 1 minute	kV	610		610
7	Ancillary equipment
7.1	Number of trip coils required		2/pole		2/POLE
7.2	Number of closing coils required		1/pole		1/POLE
7.3	Degree of protection		IP 55		IP55
·         For SF6 circuit breakers , insulation levels at minimum SF6 gas working pressure , at15  C.					YES
*    Based tests ( Impulse + ACp ) , required on switchgear for 300kV and above .					YES
+    Wet tests are required on outdoor open-terminal switchgear .					YES