K-70 series indoor switchgear and controlgear for 6(10), 20 kV
K-70 series switchgear and controlgear is intended for the reception and distribution of three-phase AC electric power with rated voltages of 6(10), 20 kV and rated current of 630-3150 A, frequency of 50(60) Hz.
Key design features and advantages of K-70 series switchgear and controlgear:
- overhead busbars;
- unilateral maintenance;
- the drawout component in the middle part of the cabinet can be rolled out to a mobile trolley;
- front doors ensuring fault isolating;
- earthing disconnector with spring-assisted connection of knives;
- single ground loop;
- the foundation framework does not require a special initial construction work;
- possible termination of up to 12 cables in one cabinet;
- two-stage arc protection;
- simple shutters automatically closing when the drawout components are rolled out;
- possible installation of double, triple, and quadruple wound current transformers with sealing metering circuits;
- any circuit breaker type can be supplied at the customer's option;
- handy relay cabinet which holds any microprocessor-based circuitry;
- special enlarged relay cabinet allowing making any electrical engineering circuit;
- all required personnel misoperation interlocking;
- the framework and most components are made of galvanized steel.
|
Parameter name
|
K-70D
|
K-70
|
K-70T
|
|---|---|---|---|
|
Rated voltage, kV
|
20
|
6; 10; 15
|
|
|
Maximum operating voltage, kV
|
24
|
7.2; 12.0; 17.5
|
|
|
Rated frequency, Hz
|
50; 60
|
||
|
Rated current of busbars at a frequency of 50 Hz, A
|
1000; 1600; 2000; 2500
|
2000; 2500; 3150
|
|
|
Rated current of the main circuit of the cabinet for moderate climate at a frequency of 50 Hz, A
|
630; 1000; 2000; 2500
|
630; 1000; 1600
|
2000; 2500; 3150
|
|
Short-time thermal current, kA
|
25
|
20; 31.5
|
31.5; 40; 50
|
|
Short-time electrodynamic current, kA
|
64
|
51; 81
|
81; 128
|
|
Rated breaking current of the circuit breaker, kA
|
25
|
20; 31,5
|
31.5; 40; 50
|
|
Overall dimensions, no more than, mm:
|
|||
|
width
height
height with a big relay cabinet
depth
depth with protective cover
depth with bus-based lead-in
|
1000
2385
2700
1450
1620
2000
|
750
2385
2700
1350
1520
1750
|
1000
2385
2700
1350
1520
1750
|
|
Weight, no more than, kg:
|
|
||
|
cabinet with a vacuum circuit breaker
|
1300
|
1000
|
1200
|
|
cabinet w/o a vacuum circuit breaker
|
1000
|
800
|
1000
|
|
cabinet with an auxiliary transformer
|
1400
|
1100
|
1100
|
|
Climatic version
|
U3 (N3 as per IEC)
|
||
|
Altitude above sea level, m
|
1000
|
||
|
Ambient temperature, ºC
|
+ 40°; - 45°
|
||
Made in accordance with the Technical Specifications TSh 00212883-025:2014.