GW5 High Voltage Disconnector

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1. Product Overview
a. The GW5 high voltage disconnector is applicable to switching of high voltage lines with no load. It is also used for isolating high voltage busbar and electrical equipment like circuit breaker from the live high voltage lines when the busbar and electrical equipment need maintenance.
b. Our GW5 AC disconnector consists of the base, post insulators, and the conducting parts. It includes three monopoles and each monopole has a V type double-column structure. The two post insulators of each monopole are arranged in an angle of 50 degrees and they are mounted on the bearing seats connected with the base. A pair of bevel gears is adopted for meshing transmission. The knife switch has left and right contacts which are respectively fixed on the post insulators.
c. The activated operating mechanism drives one post insulator to rotate by 90° and the other insulator rotates by 90° in the opposite direction at the same time due to the meshing between the bevel gears. Hence, the left and right contacts are opened or closed to the same side. During opening, there is a clearly noticeable horizontal isolation fracture between the two contacts.
d. The GW5 high voltage disconnector can be equipped with a JW7 earthing switch. A mechanical interlock is set between the two.
e. Three-pole mechanical linkage can be realized through the connecting rods between the monopoles. Both the main switch and the earthing switch can be equipped with the CS17I to CS17IV series of improved manual operating mechanisms. The CJTKB electric mechanism can also be adopted according to customer requirements.

2. Product Classification
a. Divided by voltage level: 40.5kV, 72.5 kV, 126 kV, 145 kV;
b. Divided by current level: 630A,1250A, 1600A, 2000A,2500A,3150A;
c. Divided by whether there is a grounding switch: Not grounded, left grounded, right grounded, double grounded;
d. Divided by transmission mode: 90-degree transmission, 180-degree transmission

3. Main Technical Parameters
Table 1

Model		GW5-40.5Ⅲ						GW5-72.5Ⅲ
Rated voltage kV		40.5						72.5
Rated current A		630	1250	1600	2000	2500	3150	630	1250	1600	2000	2500	3150
Isolation switch	Rated peak withstand current kA	80, 100	80, 100	100, 125	100, 125	125	125	80, 100	80, 100	100, 125	100, 125	125	125
	Rated short-time withstand current (rms) kA	31.5, 40	31.5, 40	40, 50	40, 50	50	50	31.5,40	31.5, 40	40, 50	40, 50	50	50
	Rated short-circuit duration s	4s for 31.5kA, 40kA 3s for 50kA
Earthing 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	95/107*						160/181*
	Between fractures	118/134*						200/226*
Rated lightning impulse withstand voltage (peak) kV	To earth	185/210*						350/396*
	Between fractures	215/243*						410/464*
Rated terminal static mechanical load N	Horizontal longitudinal	1000						1000
	Horizontal transverse	750						750
	Vertical	1000						1000
Opening and closing bus switching current (bus transfer voltage: 100V)A		504	1000	1280	1600	2000	2500	504	1000	1280	1600	2000	2500
Radio interference level		≤500μV
Capacitive current opened and closed (phase voltage) A		1, 2
Inductor current opened and closed (phase voltage) A		0.5, 1
Mechanical life		3000 times
Monopole weight kg		150						190

Table 2

Model		GW5-126Ⅲ						GW5-145Ⅲ
Rated voltage kV		126						145
Rated current A		630	1250	1600	2000	2500	3150	630	1250	1600	2000	2500	3150
Isolation switch	Rated peak withstand current kA	80, 100	80, 100	100, 125	100, 125	125	125	80, 100	80, 100	100, 125	100, 125	125	125
	Rated short-time withstand current (rms) kA	31.5, 40	31.5, 40	40, 50	40, 50	50	50	31.5, 40	31.5, 40	40, 50	40, 50	50	50
	Rated short-circuit duration s	4s for 31.5kA, 40kA 3s for 50kA
Earthing 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	230/260*						285/325*
	Between fractures	300/340*						330/375*
Rated lightning impulse withstand voltage (peak) kV	To earth	550/625*						660/750*
	Between fractures	650/740*						760/860*
Rated terminal static mechanical load N	Horizontal longitudinal	1250						1500
	Horizontal transverse	750						1000
	Vertical	1000						1250
Opening and closing bus switching current (bus transfer voltage: 100V) A		504	1000	1280	1600	2000	2500	504	1000	1280	1600	2000	2500
Radio interference level		≤500μV
Capacitive current opened and closed (phase voltage) A		1, 2
Inductor current opened and closed (phase voltage) A		0.5, 1
Mechanical life		3000 times
Monopole weight kg		240						350

Note: For the data marked with "*" in Table 1 and 2, the number before "/" is the parameter value at an altitude of 2000 m and the number after "/" is the parameter value at an altitude of 1000 m.

4. Service and Installation Conditions
Ambient temperature: -50℃~ 50℃;
Altitude: ≤ 2000m;
Wind pressure: ≤ 700Pa;
Ice thickness: ≤ 20 mm;
Pollution class: class III and IV;
Seismic intensity: ≤ 9 class;
There should be no inflammable, explosive, corrosive materials or severe vibration at the installation site.

Related Names
Earth Leakage Switch | Electrical Disconnect Device | High Voltage Supply Switch

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