Disconnector GW4-40.5/72.5/126/145/252 the series of GW4 disconnector are double-column horizontal rotating structures

Disconnector GW4-40.5/72.5/126/145/252

Main feature

the silver layer of contact is thick and rigid, so it has reliable electric and mechanical performance.

the motor mechanism isCJ5B mechanism, the manual mechanism is CSA or CS17 or CS19 mechanism.

Ambient:

Ambient Air Temperature:      -40~+40°C

Ice Coating thickness:            10mm

Wind-pressure:                       700(34m/S) Pa

Seismic level:                          8 degree

Altitude:                                   1000 or 2000 m

Technical parameters

Item		Unit	GW4-40.5	GW4-72.5	GW4-126	GW4-145	GW4-252
Rated Voltage		kV	40.5	72.5	126	145	252
Rated Current		A	3150	630/1250/2000/3150			2000	3150
Rated Short Time Withstand Current(3s)		kA	40	25/31.5/40/50			40	50
Rated Peak Withstand Current		kA	100	63/80/100/125			100	125
Rated Short Time Power Frequency Withstand Voltage	To Earth	kV	70	140	230	275	460
	Across Open Contacts		80	160	265	315	530
Rated Lightning Impulse Withstand Voltage	To Earth	kV	170	325	550	650	1050
	Across Open Contacts		195	375	630	750	1200
Creepage		mm/kV	25 or 31
Isolating Distance After Main Contact Open		mm	530	950	1250	1550	>=2450
Isolation distance after earthing blade open		mm	560	520	910	1180	>=1800
Bending force of porcelain insulator		N	4000	6000
Torsion foce of porcelain insulator		N.m	2000