GE 489-P1-LO-A20-E Generator management relay

GE 489-P1-LO-A20-E Generator management relay

Protection function parameter
Overcurrent protection: with high set phase overcurrent, negative sequence overcurrent, grounding overcurrent and other protection functions.
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, DNP 3.0, Modbus TCP/IP protocol, easy to communicate with the upper computer monitoring system, substation automation system or other intelligent equipment, remote monitoring, parameter setting, fault diagnosis and data download and other functions.
Input/output parameter
Digital input: There are seven assignable digital input, optical isolation input.
Output relays: There are usually multiple output relays used to control external devices, such as tripping, alarm, etc.
Voltage transformer input: There are four voltage transformer inputs, three for generator end voltage and one for neutral line voltage.

Other parameters
Data recording: Demand metering update rate is 50ms. It can record the generator operating hours, demand (current MW, Mvar, MVA) and other data, and can also record fault events, which is convenient for users to perform fault analysis and system operation evaluation.
Display function: Equipped with an enhanced display, there is a large LCD display, located at the top edge of the front panel has a 40-character display area, can display set points, actual value messages and diagnostic and default messages, etc., convenient for users to view the operating status of the generator, fault information, measurement parameters and other content.
Front panel design: The front panel is equipped with a numeric keypad, up and down keys, program port interfaces, multiple status indicators, and control and programming keys. The bottom edge of the front panel includes a pull-out handle for mounting wire lead seals to prevent unauthorized removal.