GE 489-P1-LO-A20 Generator management relay

GE 489-P1-LO-A20 Generator management relay

Power supply parameter
Control power supply: Low voltage input, support 20-60V DC or 20-48V AC power supply, frequency range 48-62Hz.
Current parameter
Phase current input: Suitable for 1A phase CT secondary power supply.
Analog output: The analog output is 4-20mA, which can convert the internal measured electrical parameters and other information into standard analog signal output for easy interface and data transmission with other devices.

Protection function parameter
Overcurrent protection: with high set phase overcurrent, negative sequence overcurrent, ground overcurrent and other protection functions, negative sequence overcurrent starting level is 3%-100% rated full load current (FLA), step size is 1%.
Voltage protection: including overvoltage, undervoltage, neutral line overvoltage (fundamental wave), neutral line undervoltage (third harmonic) protection.
Frequency protection: overfrequency (two steps), underfrequency (two steps) protection function.
Other protection: It also has functions such as thermal overload, RTD (stator, bearing, environment, etc.) protection, low forward power, reverse power (prevent motor operation), reactive power (loss of magnetism), distance element (2 protection areas), loss of magnetism (2 impedance circles), accidental power-on, off-line overcurrent protection when starting.

Communication parameter
Communication protocol: Support Modbus RTU/Half-duplex, DNP 3.0 protocol.
Input/output parameter
Digital input: 9 optical isolated inputs.
Output relays: There are six Form-C output relays, five of which are non-fail-safe and the sixth is fail-safe service relays.
Voltage transformer input: There are four voltage transformer inputs, three for generator end voltage and one for neutral line voltage.