MSR-HD

Protection Relay


MSR-HD Digital Motor Protection Relay with Voltage Metering

Advantages at a glance

Fully equipped, digital microprocessor based motor protection relay with 10 PT100 inputs. Separate alarm and trip relay inclusive MODBUS communication. Any faults which will not be detected by the soft starter will be detected by the MSR. Then it opens the line contactor. If the high short-circuit current exceeds the breaking capacity of the contactor the line contactor on so that the upstream fuse will switch off the fault current.

  • Up to 50°C ambient temperature
  • Comprehensive protection functions
  • Current- and voltage metering
  • 10x PT 100 inputs
  • Real time clock

Details

The motor protection relay disposes of the following protection functions:

  • (51R) Over current (overload) with adjustable delay
  • (50) Over current (short circuit) with adjustable delay
  • (37) Undercurrent with adjustable delay
  • (46) Current unbalance
  • (27) Under voltage with adjustable delay
  • (59) Overvoltage with adjustable delay
  • (32L) Undercurrent trip with adjustable delay
  • (50G) Ground fault alarm with adjustble delay
  • (50N) Ground fault trip with adjustable delay
  • (47) Phase fault
  • (47) Phase sequence
  • (48) Long start time
  • (66) Too many starts
  • (51L) Load increase
  • (49/51) Thermal overload
  • (49S/51) Blocked rotor
  • (49R) Motor over temperature Thermistor input (PT100)
  • (55) Low power factor
  • (86/94) External fault
  • (//3) Internal fault
  • (3) Communication fault
  • Multi-function programmable I/O’s
  • Opto-isolated in- and outputs
  • 4 digital inputs
  • 4 transformers 8A/250V
  • 4 analogue outputs
  • 4 analogue inputs
  • Profibus/Modbus
  • LED’s On, Stop, Start, Run
  • LED’s Trip, Alarm, Relay, A, B, Internal fault

Digital

  • Illuminated LCD with 2 lines of 16 characters each
  • Selectable languages: English, German, French or Spanish (aditional on request)
  • The LCD indicates the motor current, fault descriptions and statistical data.
  • The LEDs provide a quick status indication. (control voltage on, motor soft start, motor on, motor soft stop, motor stop, fault)
  • Easy settings by six clearly marked keys, user-friendly software with factory default parameters.

Communication RS 485

Modbus Profibus

RS 485 with MODBUS or PROFIBUS protocol enable:

  • Remote (start, stop, etc.)
  • Monitoring (motor current, faults, statistical data)
  • Remote parameter setting
  • Remote reset