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IRZ-700 series soft start drives for ESP

Purpose

Control, monitoring of parameters and protection of submersible motors with power ranging from 14 to 400 kW, with smooth start and stop.

Functions

  • 4 start modes: start with current increase, start with current limitation, inching start, direct start
  • 2 stop modes: smooth deceleration, run-down stop
  • manual or automatic control
  • continuous control of electric mains parameters, currents in three phases and isolation resistance of the “pump transformer — power cable — motor” link
  • calculation of voltages and currents imbalance, power factor, load factor, power consumption, operating time
  • connection of surface readout units of telemetry systems of various manufacturers
  • registration of monitored parameters and reasons for motor 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
  • socket with a rated voltage of 380 V and phase current of up to 60 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

Advantages

  • various modes of start and stop
  • small dimensions and weight
  • easy operation and maintenance
  • easy connection
  • highly informative liquid crystal display
  • ability to save history to a USB-drive
  • software update without shutting down the motor
  • compliance with the requirements of oil companies and GOST R 51321.1
  • bus design of the power systems
  • ability to include in the drive a set of electricity metering devices included in the State Register of Measuring Instruments

Modifications

DesignationRated current, AOverall dimensions, mmWeight, kg
IRZ-721-160 160 1755x795x635 160
IRZ-721-250 250 170
IRZ-722-400 400 185
IRZ-723-630 630 190
IRZ-724-800 800 200
IRZ-725-1000 1000 240

ParameterValue
Supply voltage 190—520 V
Power of the connected motor 14—400 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 and time setting 2 %
Insulation resistance monitoring error 5 %
Operating temperature -60…+60 °С
Enclosure protection class IP43 (or IP54)

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