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?: The two equipment is the equipment for the control, protection, monitoring and measurement of the work of the primary equipment.

Q: What are the general requirements for working on distribution equipment?: When the high voltage line is not cut off, the person in charge of the work shall explain to the whole staff that there is electricity on the line and strengthen the monitoring

Q: AC distribution equipment including distribution box: so there will be in the power distribution cabinet a reference line and a zero line selection of single-phase 6A can switch.

Q: DC transmission equipment: DC screen commonly known as intelligent maintenance free DC power supply screen, referred to as DC screen, the general model is GZDW.

Q: Are electric wires and cables belong to distribution equipment?: Wire and cable for the transmission of electric (magnetic) energy, information and realize electromagnetic energy conversion of wire products, wire and cable general also referred to as the cable,

Q: What is the transmission line, what is the power distribution equipment: Distribution equipment is generally referred to as the distribution lines and distribution substations (usually 35kV and below).

Q: Rural high voltage transmission line equipment ownership: You do not want to what the transformer behind the high-voltage line,

Q: Transmission and transformation equipment: Transmission and transformation of basic electrical equipment, including the main wire, transformers, switchgear, high voltage insulators, etc.

Q: Difference between distribution voltage and supply voltage: Supply voltage refers to the supply point of the line voltage or phase voltage.

Q: Power distribution equipment should be prepared before the blackout?: Before the power failure, the person in charge or the electrical appliance technician should fill in the work order.

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