Asian Power

Protection Relay

HighPROTEC MRMV4

Motor Protection

The MRMV4 is a motor protection relay that provides precise and reliable protective functions and is very easy to operate. The MRMV4 provides all necessary functions to protect low and medium voltage motors at all power levels. The protection functions are based on current and voltage measurement and supervise all thermal conditions, motor start sequence, stall and locked rotor, undercurrent and incomplete sequence. Overcurrent functions and earth fault functions are also available as power protection, frequency and voltage elements. The motor operation can be monitored by statistic and trend recorders.

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Overview

The MRMV4 is a motor protection relay that provides precise and reliable protective functions and is very easy to operate. The MRMV4 provides all necessary functions to protect low and medium voltage motors at all power levels. The protection functions are based on current and voltage measurement and supervise all thermal conditions, motor start sequence, stall and locked rotor, undercurrent and incomplete sequence. Overcurrent functions and earth fault functions are also available as power protection, frequency and voltage elements. The motor operation can be monitored by statistic and trend recorders. The MRMV4 is available in 192 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRMV4-2xxxxx (i.e. 5 digits/letters following the ‘-2’). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRMV4-2E or in the user manual MRMV4-3.6-EN-MAN) for a complete overview.

Features

  • Motor Protection
  • Additional Protection
  • PC Tools
  • Supervision Functions
  • Motor Start Recorder
  • Statistic Recorder
  • Additional Recorder
  • Counters
  • Commissioning Support
  • Communication Options
  • Control and Supervision
  • Logic equations for protection
  • Time Synchronization
  • Wattmetric Ground Fault Protection

Highlights

  • 4 Analog Outputs (Type MRMV4-B)
  • Long starting time for reduced voltage starts
  • Emergency Start
  • Incomplete Sequence
  • Anti-backspin Time Delay
  • Permitted number of cold starts
  • Supervision of starts per hour
  • Mechanical load shedding
  • Zero speed indication via input
  • Motor Stop Inputs
  • External alarm and trip inputs
  • 4 Setting Groups

Details

Current Inputs

4 (1 A and 5 A) with automatic CT Disconnect

Voltage Inputs

4 (0–800 V)

Digital Inputs

Switching thresholds adjustable via software

Power Supply

24 VDC – 270 VDC / 48 VAC – 230 VAC (−20/+10%)

Terminals

All terminals plug type

Type of enclosure

IP54

Dimensions of housing (W x H x D)

19“ Flush Mounting:
212.7 mm × 173 mm × 208 mm
8.374 in. × 6.811 in. × 8.189 in
Door Mounting:
212.7 mm × 183 mm × 208 mm
8.374 in. × 7.205 in. × 8.189 in

Weight (max. components)

approx. 4.2 kg / 9.259 lb









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