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Solid Insulated Ring Main Unit

Solid Insulated Ring Main Unit

As the upgraded version of SF6 inflatable switch device, this XGNY2-12 solid insulated ring main unit utilizes the solid insulation technology without SF6 gas. It is perfectly in consistent with requirements on environmental protection. Our product gets all the conductive parts sealed or insulated to prevent the discharging of each phase.

Our product is thoroughly insulated, shielded and free of maintenance. It is not subject to the external contaminant and metal lap any more. Due to the modular assembly design, it is convenient for the solid insulated ring main unit to expand the circuit and replace the units and systems.

Configured with the spring operation mechanism, the product can be manipulated by motor or manually. Moreover, it comes with credible mechanical interlocking performance, totally meeting the interlocking demands.

Rated Parameters
No.ItemUnitTechnical data
1Rated voltagekV12
2Rated currentA630
3Rated frequencyHz50
4Rated short circuit breaking currentkA20
5Rated short circuit making currentkA50
6Rated cable charging currentA25
7Thermo-dynamic current (virtual value)Main circuit (4s)kA20
Earthing switch and earthing circuit
8Thermo-dynamic current (peak value)Main circuit (4s)kA50
Earthing switch and earthing circuit
9Insulation test (across gap, to ground)1min P.F. withstand voltage (gap/earthing)kV48/42
Lightning impulse (gap/earthing) (peak)kV85/75
10Resistance of main circuitμΩ<100
11Resistance of earthing circuitμΩ<60
Mechanical Feature Parameters
No.ItemUnitTechnical data
1Open distance of contactMain gapmm9±1
Disconnect gap8±1
Earthing gap8±1
2Over travel of contactMain gapmm3±1
Disconnect gap2.5±1
Earthing gap2.5±1
3Average closing speedMain gapm/s0.6+0.2
Disconnect gap0.6+0.2
Earthing gap0.6+0.2
4Average opening speed (main gap)m/s1.2+0.2
53-pole closing and opening synchronismms≤2
6Closing bouncing timems≤2
7Closing time (main gap)ms30~37
8Opening time (main gap)ms30~37
9Mechanical lifeTimes30000
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