Cabinets of KRUE-6V-630-20 U2.1 series switchgears and controlgears for 6 kV excavators
Cabinets of KRUE-6V-630-20 U2.1 series switchgears and controlgears are designed for the reception and distribution of three-phase AC electric power with a frequency of 50 Hz, rated voltage of 6 kV, and rated current of 630 A on excavating machinery operating in mains with low earth fault current.
KRUE-6V-630-20 U2.1 series switchgear and controlgear cabinets are made of climatic category U2.1 according to GOST 15150.
Normal operation of switchgear and controlgear cabinets is ensured under the following conditions:
- ambient air temperature: from -5º C to +40º C;
- upper value of the relative air humidity: 98% at 25º C;
- altitude above sea level: no more than 1000 m;
- falling-out of dew inside the cabinet is excluded;
- environment: atmosphere type II according to GOST 15150; at that, it must be non-explosive and fire-safe;
- external mechanical impacts: vibrational load within the frequency range of 1-35 Hz with a maximum acceleration of up to 0.5 g; hit-and-run strikes with a maximum acceleration of up to 3 g and duration of 2-20 ms; trim amd list of up to 15º.
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Parameter name
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Value
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|---|---|
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Rated (linear) voltage, kV
|
6; 6.3; 6.6
|
|
Maximum operating (linear) voltage, kV
|
7.2
|
|
Rated current of the main circuits of the switchgear and controlgear cabinet, A
|
630
|
|
Rated breaking current of the circuit breaker
embedded in the cabinet, kA
|
20
|
|
Short-time thermal current of the switchgear and controlgear cabinet for time span of 3 sec, kA
|
20
|
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Short-time electrodynamic current of the main circuits of the switchgear and controlgear cabinet, kA
|
51
|
|
Rated current of HV safety device’s fuse link, A
|
31.5; 40; 50
|
|
Open-circuit current broken by a disconnector, A
|
1.0
|
|
Insulation level circuits of the switchgear and controlgear cabinet according to GOST 1516.1-76
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Standard
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Insulation type
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Air
|
|
Maintenance conditions
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Trilateral maintenance
|
|
Protection rating according to GOST 14254-96
|
IP42
|
|
Overall dimensions, width x height x depth, mm:
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894х2126х1105
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Made in accordance with the Corporate Standard Ts 00212883-023:2014.