MMLG01 | Generator Protection Relay Module

Key Features and Advantages

Comprehensive Generator Protection: The MMLG01 provides complete protection for generators up to 300 MVA, including advanced differential protection with harmonic restraint to prevent maloperation during transformer energization.

Adaptive Protection Logic: Programmable logic functions enable customized protection schemes that adapt to different operating modes, including synchronization check and automatic transfer schemes.

High-Speed Operation: With a protection operation time of less than 15ms for critical faults, the MMLG01 minimizes equipment damage and prevents catastrophic failures in power generation systems.

Advanced Metering Capabilities: Integrated power quality monitoring includes harmonic analysis up to the 31st order, voltage/current unbalance measurement, and energy metering with Class 0.2 accuracy.

Event Recording: The module captures 100+ event records with time stamps for fault analysis and system diagnostics, supporting post-event investigation and system optimization.

MMLG01

Application Fields

The MMLG01 is designed for critical generator protection in diverse power generation environments. In thermal power plants, it safeguards steam and gas turbine generators against internal faults and abnormal operating conditions. Hydroelectric facilities utilize this relay for protection of water turbine generators against stator and rotor faults.

Industrial applications include protection of backup generators in data centers, hospitals, and manufacturing facilities. Renewable energy installations deploy the MMLG01 for protection of synchronous condensers in solar farms and biogas generation facilities. Its robust construction makes it suitable for harsh environments like offshore platforms and mining operations.

Related Products

MMLB01: Feeder protection module
MMLD01: Transformer differential protection module
MMLM01: Motor protection module
MMLC01: Control module for bay control applications
MMLI01: Communication interface module
MMLP01: Power supply module
MMLS01: Synchronization module

Installation and Maintenance

Installation Preparation: Before installing the MMLG01, verify CT ratios match generator specifications. Ensure proper grounding according to manufacturer guidelines to prevent measurement errors. Maintain minimum clearance around the module for ventilation and heat dissipation.

Maintenance Recommendations: Perform functional tests annually using secondary injection test sets. Verify settings after any system modification. Monitor relay self-diagnostics through communication interfaces. Clean ventilation openings annually using low-pressure air. For firmware updates, follow manufacturer technical bulletins.