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IRZ-200 series direct start drives for ESP


Control, monitoring of parameters and protection of submersible electric motors (SEM) with a capacity of 3 to 250 kW.

The product provides the following:

  • manual or automatic control 
  • continuous monitoring of electric mains parameters, currents in three phases and isolation resistance of the “pump transformer — power cable — motor” link
  • calculation of voltage and current imbalance, power factor, SEM load factor, power consumption, operating time 
  • connection of surface readout units of telemetry systems produced by various manufacturers 
  • registration of monitored parameters and reasons for shutdown in real time with saving records in case of power failure 
  • protection of equipment from emergency caused by failures in the electric mains and submersible motor
  • automatic reclosure when parameters return to the operating range

The drive provides connectivity to the following equipment:

  • socket on the operator panel with a rated voltage of 220 V and a current consumption of up to 10 A
  • remote control systems (normally closed and normally open contacts)
  • the SCADA-system by means of RS-232 or RS-485 interface via the Modbus-RTU exchange protocol
  • GPRS modem with the ability to upload information to the Internet


  • small dimensions and weight, can be carried by two persons and transported by a passenger car 
  • easy for use and service
  • easy to connect
  • highly informative liquid crystal display 
  • ability to save history to a USB-drive 
  • software update without the motor switch-off
  • compliance with the requirements of oil companies and GOST R 51321.1 
  • bus design of power systems with current rating over 250 A
  • ability to include in the drive a set of electricity metering devices included in the State Register of Measuring Instruments 


DesignationRated current, AOverall dimensions, mmWeight, kg
IRZ-200-25* 25 1755x795x635 180*
IRZ-201-160** 160 1215x540x365 60
IRZ-201-250 250 1680x780x630 150
IRZ-202-400 400 1680x780x630 155
IRZ-202-400** 400 950x585x370 75
IRZ-203-630 630 1680x780x630 245

* — Drive with a built-in output isolation transformer, for control and monitoring the installation of an electrodiaphragm pump
** — Mobile direct start drive

Supply voltage 190—520 V
Power of the connected motor 3—250 kW
Monitoring of the motor operating current (performed according to the transformer primary winding with recalculation into the motor actual operating current 0—2000 A 
Control of insulation resistance of the “transformer — power cable — motor” link 0—10000 kOhm
Control of turbine rotation frequency 1—50 Hz
Error of monitored current, voltage, rotation frequency, time settings 2 %
Insulation resistance monitoring error 5 %
Operating temperature -60…+50 °С
Enclosure protection class IP43 (or IP54)