NTC-10.10.2 “Relay protection and automation МR301”

The educational laboratory stand is designed for carrying out laboratory works in “Relay protective automation” in secondary educational institutions.
 
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The educational laboratory stand is designed for carrying out laboratory works in “Relay protective automation” in secondary educational institutions.

Constructively the stand consists of a body where some electrical equipment, a relay, a frontal panel and a tabletop of an integrated worktable are installed.

The following items are placed inside the body:

  • step-down transformers;
  • module of load resistors.

The electrical diagram of the laboratory stand is depicted on the frontal panel. A module of automatic circuit breakers, a power unit BPT-615, a microprocessor protective relay  MR-301, instrumentation, indicators and controls are installed on the panel.

Readings are registered according to digital ammeters and the PLC-display of the microprocessor relay.

The stand allows conducting the following operations:

  • study of the microprocessor protective relay MR-301 programming;
  • study of the current changes in the line phases in nominal operating mode and with different types of faults (single- , two-, three-phase short circuits);
  • study of the microprocessor protective relay MR-301 operation in nominal operating mode of the line and with different types of faults (single- , two-, three-phase short circuits);
  • microprocessor protective relay MR-301 remote control.
 

Experiments provided

  1. Study of the microprocessor protective relay MR-301 and its software;
  2. Setting the parameters of protection against overcurrent and checking its work with different types of faults (single- , two-, three-phase short circuits);
  3. Setting the parameters of protection against zero-sequence overcurrent and checking its work with different types of faults (single- , two-, three-phase short circuits);
  4. Setting the actuation of the protective relay MR-301 from external signals;
  5. Configuring receipt of discrete control signals, assigning commands for the protective relay MR-301 and checking its work with different types of faults (single- , two-, three-phase short circuits);
  6. Study of operation of power unit BPT-615 for power supply of the microprocessor relay protection devices in “main power” and “standby power” modes.

Technical specifications

Power supply 3~50Hz 380V 3P+PE+N
Power consumption, Watt ≤500
Stand overall dimensions:
Width, mm 1310
Height, mm 1460
Depth, mm 600
Weight, kg ≤60

Scope of delivery

  • laboratory stand;
  • guidelines;
  • passport.