MMLB01 | Protection Relay Module

Key Features and Advantages

Advanced Protection Algorithms: The MMLB01 employs sophisticated digital signal processing for accurate fault detection and discrimination, ensuring selective tripping coordination in complex power networks.

Robust Construction: Designed for harsh substation environments, the module features high immunity to electromagnetic interference (EMI) and transient voltages, meeting IEC 60255 surge withstand standards.

Flexible Configuration: With programmable logic functions and multiple setting groups, the MMLB01 adapts to various system configurations including radial, ring-main, and meshed networks.

Comprehensive Metering: Integrated measurement capabilities include voltage, current, power, energy, and power quality parameters with Class 0.5 accuracy for precise system monitoring.

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 MMLB01 provides critical protection in medium-voltage distribution networks. In utility substations, it safeguards feeders and transformers against overcurrent and earth faults. Industrial plants utilize this module for main incomer protection and busbar protection schemes.

Renewable energy applications include protection of collector systems in solar farms and wind parks. The MMLB01‘s directional protection capability makes it ideal for ring-main units where fault current direction determines protection coordination. Mining operations deploy this relay for conveyor system protection where voltage dips and motor starting currents require specialized settings.

Related Products

MMLB02: Enhanced version with distance protection
MMLC01: Control module for bay control applications
MMLD01: Differential protection module
MMLM01: Motor protection module
MMLG01: Generator protection module
MMLI01: Communication interface module
MMLP01: Power supply module

Installation and Maintenance

Installation Preparation: Before installing the MMLB01, verify CT ratios and burden requirements. Ensure proper grounding according to manufacturer specifications. 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.