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Motor Protection Relay
Motor Protection Relay
Prok Devices Private Limited, an ISO 9001-2008 certified company, offers a Motor Protection Relay, Model PD-MMPR-303 that uses state-of-the-art microcontroller based measurement techniques for providing protection for motors up to 85 HP. Microcontroller based reliable hardware with special algorithms is used to calculate the tripping time. The relay continuously monitors the three phase currents to build the thermal replica of the motor. This thermal replica is used to protect the motor against thermal overloads. The relay does not require external current transformer (CT) for its operation.
PD-MMPR-303 series is designed to offer the following protections:
- Thermal overload protection
- Unbalance protection
- Phase reversal protection
- Earth fault protection
- Locked rotor protection
- Protection against stalling
- Under current protection
Protection of LV motors up-to 85HP in motor control centres, etc.
- Accurate and real time true RMS measurements
- Selectable thermal trip time characteristics class – 10A, 10, 20 and 30
- Pre-alarm at 105 % of Im by potential free output contacts
- Thermal memory
- Continuous display of measured currents
- Fault records up to previous 999 faults and 20 previous on board faults with date and time stampings
- Increment/decrement key and mode/set key in front facia
- Fail safe/non-fail safe feature (optional)
- Operational status and type/nature of fault indications through OLED
- Communication through Modbus protocol with RS-485 port (optional)
- Enable/disable option for protection of earth fault, unbalance, under current
- Various models for motors with different current ratings
- Compact and reliable
- Manual test/ reset facility
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