How does Xiangtan Battery Electric Locomotive realize the low battery alarm function?
The Xiangtan battery electric locomotive, widely used in underground mining operations, relies on a robust electrical system powered by batteries. To ensure the safety and efficiency of these electric locomotives, a reliable battery low-level alarm and shutdown system is crucial. This system monitors the battery's voltage level and triggers alarms and shutdown procedures when the battery reaches a critical discharge state.
System Components:
Voltage Meter and Relay: The system comprises a voltage meter and a JLN1UD/50 mV~1000 V relay. The voltage meter continuously measures the battery's voltage, while the relay compares this value to a preset threshold.
Power Supply: The system is powered by a 24 VDC power supply, ensuring reliable operation even in fluctuating voltage conditions.
Alarms: An integrated 24 V DC relay and a 24 V DC active buzzer generate audible and visual alarms when the battery voltage drops below the threshold.
Power Indicator: A 24 VDC power indicator light provides a visual confirmation of the system's active status.
Voltage Sampling:
Extraction: The system extracts a direct current (DC) voltage sample from the Xiangtan battery electric locomotive battery. This sample is isolated from external voltage fluctuations, ensuring accurate measurements.
Load Voltage: The voltage sample is derived from the load voltage across the battery terminals. This voltage is compared to the preset threshold within the over-voltage alarm switch.
Alarm and Shutdown Mechanism:
Threshold Detection: When the battery voltage drops below the protection setting voltage, typically 140 V for a D-560 type 192 V battery pack, the over-voltage alarm switch activates.
Relay Activation: The relay output changes from normally open to normally closed, energizing the 24 V relay coil and the low-voltage indicator light.
Visual and Audible Alarms: The low-voltage indicator light illuminates, and the active buzzer sounds, alerting the driver to the low battery condition.
Shutdown Procedure: The energized 24 V relay opens its normally closed contact, interrupting the Xiangtan battery electric locomotive combination switch control circuit. This effectively cuts power to the electric locomotive, halting its operation and prompting the driver to recharge the battery.
The battery low-level alarm and shutdown system plays a critical role in safeguarding the Xiangtan battery electric locomotive and its operators. By promptly alerting the driver to a low battery condition, the system prevents sudden power loss, potential damage to the battery, and potential safety hazards. The system's effectiveness lies in its accurate voltage monitoring, reliable alarm mechanisms, and timely shutdown procedures, ensuring the safe and efficient operation of Xiangtan battery electric locomotives in underground mining environments.
