KRU-E-2-10
Metal-clad switchgear of the KRU-E-2-10 series is intended for receiving and distributing electrical energy of three-phase alternating current at a frequency of 50 or 60 Hz and a voltage of 6 or 10 kV in networks with an isolated neutral or a neutral earthed through an arc-suppression reactor.
It is used in indoor switchgear and electrical installations with frequent switching operations. The 6(10) kV indoor switchgear is assembled from individual switchgear cubicles, each of which houses the equipment of a single connection to the busbars of the indoor switchgear.
KRU-E-2-10 series cubicles comply with TU U 27.1-40132794-001:2016 and DSTU IEC 62271-200:2015.
The switchgear cubicles are equipped with circuit breakers of the type:
- HGV (Hyundai);
- VR 1-3 (RZVA, Rivne, Ukraine);
- VD-4, VM-1 (ABB, Germany);
- Evolis (Schneider Electric, France).
The switchgear cubicle is a metal prefabricated structure of the frame-and-panel type, made of high-quality steel sheet on high-precision equipment, painted by powder coating, with high-voltage equipment built into it, as well as measuring, signalling, protection and control devices.
Climatic version U3 per GOST 15150-69.
Protection rating of cubicles – IP20 per DSTU EN 60529:2014.
Structure of the type designation
Main technical specifications
| Parameter name | Parameter value |
|---|---|
| Rated voltage, kV | 6; 10 |
| Highest operating voltage, kV | 7.2; 12 |
| Rated current of main circuits, A | 630; 1000; 1250; 1600; 2000; 2500; 3150 |
| Rated breaking current of the circuit breaker, kA | 20; 31.5; 40 |
| Electrodynamic withstand of main circuits, kA | 51; 81; 102 |
| Thermal withstand of main circuits, kA | 20; 31.5; 40 |
| Rated voltage of auxiliary circuits: – alternating current, V – direct current, V |
220 100; 220 |
| Overall dimensions (HxWxD), mm: Dimension 7: 630 A; 1000 A; 1600 A 2000 A; 2500 A; 3150 A |
2350х900х1650 2350х1100х1650 |
| Maximum weight, kg | 950 |
The classification of KRU cubicles of the KRU2-10 series by type version, depending on the built-in equipment and connections, is given in the table.
| Letter designation of the KRU cubicle | Type version of the KM-E-1XXX cubicle | No. of main circuit diagrams |
|---|---|---|
| ШВВП | Cubicle with a vacuum circuit breaker with a spring drive | 01-64 |
| ШВВЕ | Cubicle with a vacuum circuit breaker with an electromagnetic drive | 01-64 |
| ШШШР | Cubicle with a busbar disconnector | 101-127 |
| ШТН | Cubicle with voltage transformers | 200-229 |
| ШКА | Cubicle with combined equipment | 301-305 |
| ШПС | Cubicle with power fuses | 401-416 |
| ШП | Transition cubicle | 724; 725 |
| ШНВА | Cubicle with low-voltage equipment | |
| ОРШ | Separately located relay cubicle |
The structure of the type designation of the KRU cubicle when placing an order for the manufacture of KRU is given below:
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The KRU-E-2-10 is outdoor metal-clad switchgear (excavator-mounted) for a voltage of 6–10 kV. It is intended for receiving and distributing electricity to power quarry excavators, drilling rigs, high-voltage motors and other consumers in quarries and the mining industry.
The main difference is vibration resistance. Since the KRU-E is installed directly on the rotating platforms of excavators or near operating heavy machinery, its enclosure has reinforced rigidity, and all components and relay protection are resistant to constant vibrations, shaking and impacts typical of quarry operation.
The basis of the circuit is usually a vacuum circuit breaker, which provides switching of the power circuit. It also includes a disconnector (to create a visible break), current and voltage transformers (for metering and protection), as well as surge arresters and a relay protection system against short-circuit currents.
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