Complete switchgears KRU-6 (10) kV
KRU “Rial” has been designed to receive and distribute electric power of three-phase alternating current with the frequency of 50 Hz at the voltage up to 12 kV in the systems with insulated or grounded neutral.
KRU “Rial” chambers are used on thermal, nuclear, gas-turbine power plants, on system transformer substances, for transport electrification and other objects of power supply. Modular design is the ideal solution for updating and extension of the existent substations, for replacement of outdated switchgears. Connection is provided through transitional cabinets of KRU.
KRU can be of tropical and quakeproof executions and they are successfully operated in different climate conditions.
Technical features of KRU
|
Parameter designation |
Dimensions | |
|
Rated voltage (linear), kV |
6.0; 10.0 | |
|
Maximum operation voltage (linear), kV |
7.2; 12.0 | |
|
Main circuits’ rated current, A (for UHL3 execution) |
with frequency 50 Hz |
630, 1000, 1600, 2000, 2500, 3150 |
|
with frequency 60 Hz |
630, 1000, 1600, 2000, 2500 | |
|
Main circuits’ rated current, A (for T3 execution) |
with frequency 50 Hz |
630, 1000, 1600, 2000, 2500 |
|
with frequency 60 Hz |
630, 1000, 1600, 2000 | |
|
Busbars’ rated current, A |
with frequency 50 Hz |
1000, 1600, 2000, 2500, 3150 |
|
with frequency 60 Hz |
1250, 1600, 2000, 2500 | |
|
Rated frequency, Hz |
50; 60 | |
|
Rated current of tripping of circuit breakers, integrated in KRU, kA |
25.0; 31.5; 40.0 | |
|
Short-time withstand current, kA |
20.0; 31.5; 40.0 | |
|
Peak withstand rated current of cabinets’ main circuits of KRU |
51.0; 102.0; 128 | |
|
Lead-time of short withstand current, s |
1; 3 | |
|
Rated voltage of auxiliary circuits, V |
alternating current |
110; 220 |
|
direct current |
110; 220 | |
|
lighting (a. c.) |
36; 42; 220 | |
|
Altitude level above sea max, m |
≤1000 | |
|
Rated power of auxiliary transformers, integrated in KRU cabinets, kVA |
≤40 | |
|
Group of mechanic environmental factors influence acc.to GOST 17516.1 |
6M | |
|
Operation temperature |
-5…+40 | |
|
Weight, kg |
no more than 800 | |
|
Overall dimensions of cabinets, mm |
width |
600/1000 |
|
depth |
1550/2000 | |
|
height |
2160/2500 | |
Design features
The body of KRU “Rial” chamber of “armoured” type is a grounded metal casing, that is made of zinc-coated steel sheets and correspond to IEC standard 298. The body is separated with metal partitions, that exclude the arc penetration into bays.
