SU-RN standard mine control station

Station circuitry provides:

  • Power contactors engagement/disengagement by a preset algorithm

  • Power contactors engagement/disengagement with de-energized power circuit (testing)

  • Compatibility with remote controls

  • Intrinsically safe inputs for external control circuits

  • Intrinsically safe outputs for power contactor status signals

  • Short-circuit current protection of power branches

  • Overcurrent protection of power branches

  • Overheating protection of downstream equipment

  • Remote control circuit fault or short-circuit protection

  • Prevention of self-engagement at 150% of rated voltage

  • Protection against branch ground circuit failure or resistance buildup over the allowable value

  • Branch interlock in case of external line-to-ground insulation fault or drop below the allowable level

  • Current leakage protection in internal 220V power lines

  • No-voltage protection

  • Mains power indication

  • Tripping event indication

  • Branch line engagement indication

  • Protection testing

 

Main station types according to downstream equipment:

Compact station with an automatic circuit breaker and a lighting transformer to control a shearer, a face machine, and a cooling plant

Compact station with an automatic circuit breaker to control a shearer and a cooling plant

Compact station with a transformer (P=40kVA, U=1140/660V) to control face conveyors and gate conveyors

Compact station to control face conveyors and gate conveyors

Compact station to control stowage complexes

Environment conditions:

  • Climatic version: U5 (temperate)

  • Ambient temperature: minus 5°C to +35°C

  • Relative humidity: (98±2)% at (25±2)°C

  • Atmospheric pressure: (99.75±13.3) kPa

  • Dust concentration in air: max. 1200 mg/m3

  • Vibration: max. 25 Hz

  • Vibration acceleration: max. 10 m/s2

  • Mechanical impact exposure group: M6

  • Severe shock or impact: not allowed

  • Working position: vertical, with deflection by max. 15° in any direction

  • Allowable power mains voltage fluctuations: 85% to 110% of rated value

Main performance specifications

Property

Value

Rated feed voltage, V

1140/1000/660

AC mains frequency, Hz

50

Rated trip current, A

1250

Branch line insulation control unit adjustment range, kΩ

10...130

Branch line current leakage control unit adjustment range, kΩ

10...130

Power circuit current leakage trip time adjustment range, s

0.1...0.5

Ex rating

RN2 - [Ех iа] I

Enclosure protection rating, min.

IР54

Remote control circuit intrinsic safety rating

Duty modes:

   continuous

   short-time

   intermittent

S1
S2
S3

Weight. kg

3500

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