SF6 fully insulated RMU GRM
30 years maintenance-free
Free from environmental impact,anti condensation,frost,salt fog,
filthy,corrosion,UV, chemicals and other small animals and can be used in harsh environments.
All highvoltage live parts and components are all sealed in lowpressure chamber filled with SF6 gas,
compact, miniaturized, lighter, fully insulated,Modular design, different modular combinations
to achieve the main connection, combinations can be changed according to user’s requirements,
forming circuit switching system.
Using silicone connector for installing high-voltage parts and any extension of cubicle,
fully shielded cable incoming and outgoing;
Circuit breaker unit operating mechanism contains a pre-storage operating mechanism.
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GRM
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C - module
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F - module
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Vc - module (spring mechanism)
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Vc - module (magnetic actuators)
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Switch disconnector
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Switch-fuse disconnector
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Vacuum circuit-breaker
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Earthing switch/ disconnector
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Vacuum circuit-breaker
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Earthing switch/ disconnector
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Rated voltage kV
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12/24
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12/24
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12/24
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12/24
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12/24
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12/24
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Power frequency withstand voltage kV
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42/50
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42/50
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42/50
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42/50
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42/50
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42/50
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Lightning impulse withstand voltage kV
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95/125
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95/125
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75/125
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75/125
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75/125
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75/125
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Rated current A
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630 / 630
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See1)
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630 / 630
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630 / 630
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Breaking capacities
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off load cable charging A
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10/10
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Earth fault A
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200/150
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Earth fault cable charging
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115/87
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Short-circuit breaking current kA
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See 2)
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20/16
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20 /16
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Making capacity kA
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50/40
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See 2)
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50/40
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50/40
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50/40
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50/40
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Short time current 3 KA
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20/16
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20/16
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20/16
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Number of mechanical operations
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5000 / 2000
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5000 / 2000
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10000 / 10000
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5000 / 2000
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50000 / 30000
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5000 / 2000
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