... Type 4. ISO9001/14001/CE/ROHS 5. LERDN Electrical Fire Alarm can omnidirectionally monitor various abnormity or fault, such as leakage ... current, overcurrent, overvoltage, overhigh temperature, etc. This system can sound alarm or cut off power supply in time to ensure safe ... , optional detector type is LDF-225/A-100A. Electrical Fire Alarm