A-B 1407-CGCM Combination Generator Control Module

Automatic mode: After mains power failure, the generator starts automatically with a delay of 0-10s. After speed stabilization, voltage is established, and the grid-connected contactor closes automatically when grid connection conditions are met. After mains power recovery, the load is automatically unloaded and the generator shuts down.

Manual mode: Manually controls startup/shutdown and speed/voltage fine-tuning via local buttons or remote commands.

Test mode: Supports "no-load startup" (only the engine runs without voltage output) for regular maintenance testing.

Overspeed protection: When the speed exceeds 115% of the rated value, fuel/gas supply is immediately cut off to trigger emergency shutdown.

Underspeed protection: If the speed is lower than 80% of the rated value for 10 consecutive seconds after startup, it is determined as a startup failure, the startup process stops, and an alarm is triggered.

Overvoltage protection: When the output voltage exceeds 115% of the rated value, the excitation output is cut off to avoid damage to load equipment.

Undervoltage protection: When the voltage is lower than 80% of the rated value for 5 consecutive seconds, an alarm is triggered and an attempt is made to re-establish the voltage; if failed, the generator shuts down.

Overcurrent protection: Detects the output current through an external current transformer (CT). When the current exceeds 120% of the rated current, an overload alarm is triggered and load increase is limited.

Fault memory: Can store the latest 10 fault records (including fault type, occurrence time, and speed/voltage/current data at the time of the fault), which can be queried via the communication interface or local buttons to facilitate fault traceability.

Real-time monitoring: Remotely view operating parameters such as speed, voltage, current, and load rate.

Parameter configuration: Remotely modify control parameters (e.g., speed PID parameters, protection thresholds).

Control commands: Remotely send control commands such as startup, shutdown, and grid connection.

Data upload: Upload operating data and fault records to the SCADA system to realize historical data traceability and report generation.

Power range: Three-phase AC generators with power ≤ 1000kW.

Fuel type: Diesel generators (e.g., generators matched with Cummins, Perkins engines) and gas generators (e.g., Caterpillar natural gas generators).

Excitation method: Brushless excitation generators (mainstream compatible type) and brushed excitation generators (requiring additional rectifier modules).

Speed sensor: Magnetoelectric speed sensor (e.g., A-B 1407-SEN-001) or third-party Hall sensor.

Voltage sampling: Voltage transformer (PT, with transformation ratio selected according to the generator’s rated voltage, e.g., 400V/100V).

Current sampling: Current transformer (CT, with transformation ratio selected according to the generator’s rated current, e.g., 100A/5A, for overcurrent protection and load monitoring).

Actuator: Fuel proportional valve (for diesel generators), gas throttle driver (for gas generators), and excitation regulator (e.g., A-B 1407-EXC-001).

Installation location: Install away from high-temperature components of the generator (e.g., exhaust pipes), with a distance of ≥ 30cm from heat sources to avoid module failure due to excessive temperature.

Wiring specifications: Separate control power cables from power cables (e.g., generator output cables) to reduce electromagnetic interference. Use shielded cables for speed sensor wiring, with the shield grounded at one end.

Grounding requirements: The module housing must be grounded separately, with a grounding resistance ≤ 1Ω to avoid signal interference caused by poor grounding.

Every 3 months: Check for loose terminal connections and dust accumulation on sensor probes (power off before cleaning).

Every 6 months: Calibrate the speed and voltage measurement accuracy via software (compare with a standard tachometer and voltmeter).

Every year: Back up module parameters (to prevent parameter loss) and check for oxidation of relay output contacts (testable via manual triggering).