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Vacuum Load-Break Switch VVNR-10/630
The Vacuum Load-Break Switch VVNR-10/630-20U2 applied for making and breaking of load current, over-load current and short-circuit current in the three-phase electrical distribution systems with a rated current of 630 A and a rated voltage of 6-10 kV.
This Vacuum Load-Break Switch VVNR-10/630 is designed to be installed in switchgears, front access switch cabinets, complete transformer stations. Vacuum Load Breaking Switch has a large model range.
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Features and Benefits
► Increased reliability
► High operational safety
► Combining the functions of breaker and disconnector
► Many modifications
► Low cost of installation and operation
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Technical Characteristics
The Vacuum Load-Break Switch VVNR-10/630 in cell KSO-EAZ-10/630
Table 1. Mainly technical parametersItem, Units
Technical parameters
Rated voltage, kV
10
Maximum operating voltage, kV
12
Rated current, kA
630
Rated breaking current, kA
630
Rated short-circuit breaking current, kA
3, 10
Normalized parameters of resistance to the through short-circuit currents:
- current electrodynamic stability, kA
51
- initial rms value of the periodic component of short-circuit current, kA
20
- short time withstand current, kA
20
Switching resource, cycles on-off
10 000
Mechanical life, cycles on-off
10 000
► Application conditions
- climatic conditions U2
- altitude up to 1000 m
- ambient temperature from -45° to +55° C
- nonexplosive environment without current-conducting dust and aggressive gases and vapors capable to destroy isolation and metal
- safety requirement in compliance to GOST 12.2.007.3-75
► Operating with load switch
Controlling this unit is carried through a variety of manual or motor drives. In addition a switch can be manufactured with integrated spring drive.
Earthing switches have an interlock.
► Dimensions of switch
In the basic version the distance between the phases – 175mm.
In the small version the distance between the phases – 130mm. -
Additional Information
