Complete switchgear units with gas insulation up to 35 kV

Complete switchgear units with gas insulation up to 35 kV

The NG7 series metal-enclosed, gas-insulated switchgear (GIS) represents a new generation of compact products, enabling high reliability of electrical installations with minimal maintenance. A distinctive feature of the NG7 monoblocks is their flexible configuration to suit any circuit design. The equipment has undergone specialized testing and can be used at altitudes of up to 4,000 meters and in seismically active areas with seismic activity up to magnitude 8. All switching devices and current-carrying parts are housed in a sealed compartment, allowing the product to be used in any environmental conditions.
Advantages
Compliance with European and Russian safety standards
Electrical life: 30 maximum short-circuit current trips
Mechanical life 10,000 switching cycles (function V)
630A for all circuits and switching devices. Thermal withstand current 20 kA for 4 seconds
Flexible configuration up to 5 functions to suit any client need. The most compact dimensions on the market.
The best price/quality ratio on the market
Delivery time for standard solutions is up to 45 days
Characteristics

Application: For receiving, distributing electric power, protection and control at power facilities in various industrial sectors
Insulation level: 12–40.5 kV

Rated voltage: 6, 10, 20, 35 kV

Rated current of switching devices: 630 А

Mechanical endurance: 630 А

Mechanical endurance: 10,000 ON/OFF cycles

Features: A new generation of compact products that ensure high reliability of electrical installations with minimal maintenance. All switching devices and live parts are placed in a sealed compartment, allowing operation under any environmental conditions.

Technical characteristics NG7
Main technical characteristics Unit Load break switch function Vacuum circuit breaker function
Functions S V
Rated operating voltage kV 6(10/20/35) 6(10/20/35)
Rated frequency Hz 50/60 50/60
Rated current A 630 630
Insulation level Power-frequency withstand voltage Phase-to-earth kV 42/65/95 42/65/95
Phase-to-phase kV 48/79/119 48/79/119
Control and auxiliary circuits kV 2/2/2 2/2/2
Impulse withstand voltage Phase-to-earth kV 75/125/185 75/125/185
Phase-to-phase kV 85/145/215 85/145/215
Thermal withstand current Main circuits / 4 s kA 20/20/20 20/25/25
Earthing circuits / 4 s kA 20/20/20 20/25/25
Earthing connection circuits / 4 s kA 17,4/17,4/17,4 17,4/21,7/21,7
Dynamic withstand current Main circuits kA 50/50/50 50/63/63
Earthing circuits kA 43,5/43,5/43,5 43,5/54,5/54,5
Rated short-circuit making current kA 50 50/63/63
Rated short-circuit breaking current kA - 20/25/25
Rated active load breaking current kA 630 -
Mechanical endurance Load break switch / circuit breaker 5000 10000
Disconnector / earthing switch 5000 5000
Rated SF6 gas pressure Rated filling pressure MPa 0,04 0,04
Minimum allowable MPa 0,02 0,02
Degree of protection Primary circuit compartment IP67 IP67
Low-voltage compartment IP4X IP4X
Maximum annual SF6 gas leakage, not more than %/year ≤0,1% ≤0,1%
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