NTC-10.10.3 “Relay protection and automation МR500”

[html]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.

List of laboratory works:

1. Study of the microprocessor protective relay MR-500 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-500 from external signals;
5. 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);
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 specification of the product:

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

Complete set of NTC-10.10.3 “Relay protection and automation МR500”:

• laboratory stand;
• guidelines;
• passport.