145KV, 40KA, 2000A three pole single throw Line disconnect switch

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1. Outdoor 145kV AC Bus and Line Disconnectors(ISOLATOR)
2. KEMA test report
3. ISO quality certificate
4. Good quality

General introduction :

GW4-40.5/72.5/126/145/170/252 Ⅲ Series, two columns, horizontally rotating type, HV, AC, disconnector

Product classifications and Main Technical Specifications :

1), Product classification

Voltage level: 40.5kV, 72.5kV, 126kV, 145kV, 170kV, 252kV.

Current level: 630A,1250A, 2000A, 2500A,3150A, 4000A.

Auxiliary earthing switch type: none earthing switch, left earthing switch, right earthing switch, double earthing switches.

2), Main Technical Specifications

Technical Specifications	Product Type	GW4-40.5Ⅲ	GW4-72.5Ⅲ	GW4-126Ⅲ
Rated voltage kV		40.5	72.5	126
The rated current A		1250, 2000, 3150, 4000
Disconnector	Rated peak withstand current kA	100, 125
	Rated short-time withstand current (RMS)kA	40, 50
	Rated short circuit duration s	4, 3
Grounding switch	Rated peak withstand current kA	100, 125
	Rated short-time withstand current (RMS)kA	40, 50
	Rated short circuit duration s	4, 3
Rated short-time power frequency withstand voltage (RMS) kV	to earth	95	160	230
Rated short-time power frequency withstand voltage (RMS) kV	across open contacts	118	200	230+70
Rated lightning impulse withstand voltage (peak) kV	to earth	185	350	550
Rated lightning impulse withstand voltage (peak) kV	across open contacts	215	410	550+100
minimum clearance in 1 min power frequency withstand voltage when ground blade closing to live part of disconnector		53	94	164
rated terminal static mechanic load N	longitudinal level	1000	1000	1000, 1250
	Horizontal level	750	750	750
	Vertical force	1000	1000	1000
switching micro-capacitance current A		2	2	2
switching micro-inductance current A		1	1	1
switching busbar for current transfer A (busbar transfer voltage 100V)		400V, 2500A, 100 times
Radio interference level		less than 500 μV
Mechanical life		3000	3000	3000
single pole weight (kg)		120	200	260
Note: All applied to an altitude of 2000m

Technical Specifications		GW4-145Ⅲ	GW4-170Ⅲ	GW4-252Ⅲ
Rated voltage kV		145	170	252
The rated current A		1250, 2000, 3150, 4000
Disconnector	Rated peak withstand current kA	100, 125
	Rated short-time withstand current (RMS)kA	40, 50
	Rated short circuit duration s	4, 3
Grounding switch	Rated peak withstand current kA	100, 125
	Rated short-time withstand current (RMS)kA	40, 50
	Rated short circuit duration s	4, 3
Rated short-time power frequency withstand voltage (RMS) kV	to earth	275	325	460
Rated short-time power frequency withstand voltage (RMS) kV	across open contacts	315	375	460+145
Rated lightning impulse withstand voltage (peak) kV	to earth	650	750	1050
Rated lightning impulse withstand voltage (peak) kV	across open contacts	750	860	1050+200
minimum clearance in 1 min power frequency withstand voltage when ground blade closing to live part of disconnector		188	221	291
rated terminal static mechanic load N	longitudinal level	1000, 1250	1500	1500
	Horizontal level	750	1000	1000
	Vertical force	1250	1250	1250
switching micro-capacitance current A		2	2	2
switching micro-inductance current A		1	1	1
switching busbar for current transfer A (busbar transfer voltage 100V)		400V, 2500A, 100 times
Radio interference level		less than 500 μV
Mechanical life (times)		3000	3000	3000
single pole weight (kg)		300	326	900
Note: All applied to an altitude of 2000m

Q: What are the two power distribution equipment?: Such as measuring instrument, relay, switch, button operation and automatic control to provide some of these devices the energy supply device, signal equipment, computer equipment, and control cable (such as batteries, silicon rectifier, etc.).

Q: What are the distribution network equipment: suburbs, towns and rural areas, further allocation and supply industry, agriculture, commerce, industry and residents with special needs for electricity secto

Q: What are the general requirements for working on distribution equipment?: Distribution equipment including high voltage power distribution room, substation, power distribution transformer platform, low voltage power distribution room (box), ring network cabinet, cable branch box] outage maintenance,

Q: DC transmission equipment: Power supply operation of power plant and substation in nowadays are used in DC power supply, it provides power for the control of the load and power load and DC emergency lighting load, is the foundation of modern electric power system control and protection

Q: Transmission system and distribution system: Transmission system is based on the power supply to the same level or lower substation for the purpose of the general voltage level higher (35KV or more)

Q: What is the role of transmission system and distribution system in power grid: Such as water resources are concentrated in the river basin water level drop larger place, fuel resources in coal, oil, gas.

Q: Distribution system equipment classification: Electronic equipment - named meaning, is mainly composed of electronic components

Q: Transmission lines are not electrical equipment?: Transmission lines in the power transmission project belongs to the carrier, belonging to the power cable category, should not be called equipment

Q: Main equipment of high voltage direct current transmission: At present, most of the converter adopts thyristor thyristor rectifier, which is composed of three phase bridge rectifier.

Q: Power distribution equipment should be prepared before the blackout?: electrician received power outage notice, pull down the knife switch, accept fuse.

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