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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.

K-70 series indoor switchgear and controlgear for 6(10), 20 kV

Key design features and advantages of K-70 series switchgear and controlgear:

  1. overhead busbars;
  2. unilateral maintenance;
  3. the drawout component in the middle part of the cabinet can be rolled out to a mobile trolley;
  4. front doors ensuring fault isolating;
  5. earthing disconnector with spring-assisted connection of knives;
  6. single ground loop;
  7. the foundation framework does not require a special initial construction work;
  8. possible termination of up to 12 cables in one cabinet;
  9. two-stage arc protection;
  10. simple shutters automatically closing when the drawout components are rolled out;
  11. possible installation of double, triple, and quadruple wound current transformers with sealing metering circuits;
  12. any circuit breaker type can be supplied at the customer's option;
  13. handy relay cabinet which holds any microprocessor-based circuitry;
  14. special enlarged relay cabinet allowing making any electrical engineering circuit;
  15. all required personnel misoperation interlocking;
  16. 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.

 
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