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-500, 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-500 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-500 operation in nominal operating mode of the line and with different types of faults (single- , two-, three-phase short circuits);
microprocessor protective relay MR-500 remote control.

The training system is supplied with a set of technical and methodical documentation for teaching staff.

Experiments provided

Study of the microprocessor protective relay MR-500 and its software;
Setting the parameters of protection against overcurrent and checking its work with different types of faults (single- , two-, three-phase short circuits);
Setting the parameters of protection against zero-sequence overcurrent and checking its work with different types of faults (single- , two-, three-phase short circuits);
Setting the actuation of the protective relay MR-500 from external signals;
Configuring receipt of discrete control signals, assigning commands for the protective relay MR-500 and checking its work with different types of faults (single- , two-, three-phase short circuits);
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 (three-phase five-wire with working neutral and ground conductors with line voltage 380, frequency 50 Hz)
Power consumption, Watt		≤500
Stand overall dimensions:
	Width, mm	1310
	Height, mm	1460
	Depth, mm	600
Weight, kg		≤60

Scope of delivery

laboratory training system – 1 pc.;
CD with supplemental documentation – 1 pc.;
passport – 1 pc.

NTC-10.10.3 “Relay protection and automation МR500”

Experiments provided

Technical specifications

Scope of delivery

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