36kV 1250A Outdoor disconnect switch with earth, manual type, porcelain insulator

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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 is the role of transmission system and distribution system in power grid: power plant and the load center often separated by long distances, resulting in the problem of power transmission. The power is sent to the user only hydropower area can be fully utilized by high voltage transmission line

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

Q: High and low voltage distribution equipment: Low voltage distribution equipment: low voltage distribution panel, switch cabinet, switch board, lighting box, power box and motor control center.

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: An introduction to the interpretation of flexible AC transmission systems: synchronous compensator (STATCOM), reactive power distribution is mainly used to improve the system, to adjust voltage and improve the voltage stability of the system;

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: What is the transmission line, what is the power distribution equipment: As the name implies, the transmission is by the power plant or power center regional power grid (sending end), to the load center power grid (by the end) of the transmission of electricity; power distribution is to be distributed by the substation or bus power down.

Q: Difference between distribution voltage and supply voltage: Distribution voltage refers to the power to the end user when the transmission voltage, China's short distance distribution voltage is 10KV.

Q: CHINT group in the transmission and distribution equipment to do it?: not only is the previous low, now from energy production to transportation to use to control a complete solution.

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