12kv AC Outdoor Medium High Voltage Pole Mounted Disconnector Load Break Isolator Disconnect Switch

Product Description

Product Description

GN19-12, 12C series indoor high-voltage disconnect switches (hereinafter referred to as disconnect switches) are indoor devices with a rated voltage of 12kV, three-phase AC 60Hz, and are used for dividing and closing circuits when there is voltage and no load.

This series of isolation switch is three-pole type, consisting of base frame, rotating shaft, and lever, porcelain pillar insulator, gate knife and connection board. The rotating shaft is placed on the base frame, on which three pairs of levers are welded, and the levers are necked with the gate knife through the pull rod porcelain insulator. The shaft extends out of the bottom frame, and any section of it can be connected with the operating mechanism.

The conductive part of GN19-12/400, 630, 1000, 1250 type disconnect switch is fixed on the base by two pillar insulators for each phase. (GN19-12C/400, 630, 1000, 1250 type has one pillar insulator and one porcelain casing insulator.) The three phases are installed in parallel, and the conductive part consists of static contacts of contact knives and contact holders (or conductive rods). Each phase of the contact knife are connected to the middle of the tie insulator, tie insulator and installed on the base of the spindle connected. The spindle is connected to the connecting rod (user-provided) and CS6-1 type of moving mechanism through the handle. The connecting contact knife is composed of two slotted copper plates, which not only increases the heat dissipation area of the contact knife to lower the bottom temperature, but also improves the mechanical strength of the contact knife, so that the dynamic stability of the switch is improved. One end of the contact knife is mounted on the contact block (or on the conductive rod) by a bolt (car of Shaw). GN19-12/1000, 1250 in contact with the installation of magnetic locking plate, plus the purpose of the magnetic locking plate is that when a large short-circuit current to enhance the two groove contact knife between the| attraction. GN19-12/400, 630 disconnect switches have a small limit through current, so there is no need to add a magnetic locking plate.

Product Parameters

1. The altitude does not exceed 1000m.
2. The ambient air temperature: Maximum:+40ºC; Minimum:-30ºC, Paramos:-40ºC
3. The wind pressure does not exceed 700Pa. (corresponding to 34m/s wind speed).
4. The earthquake intensity does not exceed 8 degrees.
5. The working situation hasn't frequent violent vibration.
6. The installation site of an ordinary type isolator should be kept away from gas, smoke chemical deposition,salt-spray fog, dust, and other explosive and corrosive matters that affect seriously the insulation and conduction capability of the isolator.
7. Pollution-proof type isolator is applied to severe filthy conduction area; however, it shouldn't be any explosive matters and matters causing a fire.
 

Technical parameters
No.	Item		Unit	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	12
3	Rated current		A	630(1250)
4	Rated short-time withstand current and duration		kA/s	20(25)/4
5	Rated peak withstand current		kA	50(63)
6	Rated short-time power frequency withstand voltage	Interphase, to earth(dry)	kV/min	42/1
		Interphase, to earth(wet)		30/1
		Break(dry)		48/1
		Break(wet)		36/1
7	Rated lightning impulse withstand voltage	Interphase, to earth	kV	75
		Break		85
8	Circuit resistance		μΩ	≤80
9	Mechanical life		Times	3000
10	Pollution grade			e class
11	Creepage distance		mm	≥372
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.

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