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K-63 cubicle switchboard


A 6-10 kV K-63 cubicle switchboard is designed to receive and distribute electric energy of three-phase alternating current of an industrial frequency of 50 Hz and a voltage of 6 (10) kV.

A K-63 cubicle switchboard is used as a distributing device with a voltage of 6÷10 kV, also as an electrical switchgear of transformer substations, including transformer substations (unit substations) with a voltage of 35/6÷10 kV, 110/6÷10 kV, 110/35/6÷10 kV, 220/6÷10 kV 220/35/610 kV for the electric grids of industrial plants, agricultural enterprises, power plants and electrification of rail transport.

Technical properties
Rated voltage (electric line voltage), kV: 6,0; 10
Rated frequency, Hz 50
Rated current of the main circuits in the cells of a cubicle switchboard, A 630; 1000; 1600; 2000; 2500; 3150; 4000
Rated busbar current, A: 1000*;1600;2000; 2500; 3150; 4000
Rated breaking current of a switch installed into a cubicle switchboard, kA: 12,5; 16; 20; 25; 31,5; 40
Short-time thermal current (momentary current) in case current flow time is 3 sec., kA: 20; 31,5
Short time electrodynamic current of the main circuits of the cubicle switchboard cabinets, kA: 51; 81
Insulation level according to GOST 1516.3-96 Normal B level insulation
Insulation type Air, composite
Presence of withdrawable parts in the switchboard cabinets With withdrawable parts and without withdrawable parts
Type of linear high-voltage junctions Cable junctions, bus junctions
Ingress protection rating according to GOST 14254-96 IP30, IP31 is according to the customer's requirement
Heat release on the switchboard cabinet, W, no more than:
- rated current 630 A
- rated current 1000 A
- rated current 1600 A