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IRZ-200 series ESP switchboards

Monitoring, control and protection of 3—250 kW downhole electrical motors.


  • small overall sizes and weight
  • easy operation and maintenance
  • easy connection
  • 4-line display
  • logs downloading to USB drive
  • software updating without submersible electric motor operation interruption
  • compliance with LUKOIL, ROSNEFT, SURGUTNEFTEGAS, GASPROMNEFT companies requirements and GOST R51321.1-2007 standard
  • bus-type power systems (applicable for drives with current rating above 250 A)

IRZ-200 ensures

  • motor control in manual or automatic mode
  • continuous control of supply voltage, order of phase sequence, currents in three phases and isolation resistance of the “pump transformer — power cable — motor” link
  • calculation of voltages and currents unbalance, power factor, load factor, consumed power, operation time
  • connection to IRZ’s or another manufacturer’s Surface Readout Unit
  • record of controlled parameters and causes of SEM motor switch offs in real time and saving of the records during power supply interruptions
  • equipment preservation in emergencies caused by the failures of power system or downhole equipment

With protection system activated, the station automatically restarts when parameters return back to the operating range.


  • enables connection of 220V 10A devices via female connector on operator’s panel of the station
  • can be integrated into oilfield telemechanics (normally closed and normally open contacts)
  • connecting to SCADA-system through RS232 or RS485 interfaces with Modbus-RTU communications protocol
  • uploading data on the Internet through GPRS-modem

The switchboard can be equipped with a power metering system registered in the State Register of Measuring Devices (Russia) upon request.

Supply voltage, V 190…520
Motor power, kW 3…250
Control of motor operating current, A (performed based on the primary winding of the pump transformer with re-computation into the actual motor operating current) 0…2000
Control of insulation resistance of the "transformer — power cable — motor" link, kOhm 0…10000
Control of turbine rotation frequency, Hz 1…50
Error of current, voltage, rotation frequency, and time setting control, % 2
Error of insulation resistance control, % 5
Enclosure protection class IP43
Operating temperature, °С -60…+50


DesignationRated current, AOverall dimensions, mmWeight, kg
IRZ-200-25 25 1685х765х635 180*
IRZ-201-250 250 130
IRZ-202-400 400 140
IRZ-203-630 630 150

* — with built-in output isolation transformer

IRZ-200 series ESP switchboards

Operation, control and protection of submersible electric motors with power ranging from 3 to 250 kW.

IRZ-500 series ESP/ PCP Variable Frequency Drives

The family of IRZ variable frequency drives ensures control, parameters monitoring and protection of induction and permanent magnet motors of electric submersible pumps and progressive cavity pumps enabling soft start, soft stop, and…

IRZ-700 series ESP softstarters

Parameters monitoring, control and protection of motors with power ranging from 14 to 320 kW and possibility of soft start and stop.

Variable frequency drive for sucker rod pumps & progressive cavity pumps with surface motors

The IRZ-400 Series VFDs control, protect, verify parameters, and regulate rotation frequency of SRP or PCP systems arranged with surface three-phase induction or permanent magnet motors.