Frequency converter station

Frequency converter station circuitry provides:

• Conversion of 660V/50Hz mains power into 0-690V/0-600Hz at downstream electric motor

• Control by binary and analogue signals

• Communication by Profibus, DRIVE-CLiQ

• Performance parameters indication at the operator’s panel

• Prevention of branch line self-engagement at brief (max. 0.1s) mains voltage rise up to 150% of rated value

• Output circuit leakage current protection

• Contactor interlock upon overcurrent or overheating or insulation fault trip

• Indication of power circuit overload, short circuit, or earth fault

• Electric motor temperature monitoring

Environment conditions:

• Underground excavations at mines, including salt mines, with fresh air inflow ventilation by general mine depression where standard mining electrical equipment may be used

• Industrial atmosphere type II

• Atmospheric pressure: (84.0-106.7) kPa

• Dust concentration in air: max. 500 mg/m³

• Altitude: 1000m below sea level to 1000m above sea level

• Climatic version: U5 (temperate); minimum ambient temperature: +10°C; maximum RH: (98±2)% at (25±2)°С

Main performance specifications

Other properties:

• Mains voltage fluctuations: +10%/-15% of rated value

• Version: standard mining equipment, RN2

• Environmental mechanical impact group: M6

• Working position: vertical, inclination max. 15° in any direction

Statement of conformity to standard mining version by Belgorkhimprom No.562.3.2022 BY valid till 24/05/2025