Complete switchgear units of mine standard version КРУ-РН 6/10-УХЛ5-ВВ

Complete switchgear units of mine standard version КРУ-РН 6/10-УХЛ5-ВВ
  • Nominal voltage
    6/10 kV
  • Nominal current
    up to 1600 A
  • Power off
    prior to 200 MVA
Photo

Appointment

Complete switchgear units of mine standard version КРУ-РН-УХЛ5-ВВ type are designed for distribution of the electric power of 6/10 kV voltage and 50 Hz frequency in the networks with isolated neutral terminal in different industrial sectors, as well as in underground mines and pits not dangerous on the explosion of gas, steam or dust.

Advantages

Usability, autonomy

КРУ-РН has its own auxiliary potential transformers (НОЛ), which provide the power supply of operating circuits of the cabinet. Thus, there is no need in the cabinet with auxiliary potential transformers for the power supply of РП.

Moreover, transformer НОЛ has the winding that allows keeping the measuring of the network voltage with accuracy enough for the realization of relay protections, that's why there is no need in additional cabinets with voltage transformers within РП. In case the technical or commercial accounting is needed the following can be done:

Current control in a wide range

Control over the phase currents is carried out by Rogowski loops. Micro-controller units МЗКП work with the signals from these sensors. Advantage of Rogowski loops is the linear characteristic in a wide range – from 30 to 1000 A. That is why the КРУ-РН cabinets can be used within this range without any additional adjustment.

Considered arrangement

Plug-in contacts of the roll-out element work as a disconnector in all КРУ-РН. That is why the cabinets of intersectional breaker КРУ-РН-C have the disconnector and don't need the installation of the intersectional disconnector cabinet КРУ-РН-CP. However, when two-sectional РП is installed in two rows, it is necessary to provide the installation of КРУ-РН-CP to remove voltage from the power busbar bridge between the rows.

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Complete switchgear units