Usage Tips:Features: Standard modular structure, guide rail type installation Real-time monitoring of dc overvoltage and undervoltage faults No additional auxiliary power supply is required Both over - voltage and under - voltage value can be adjusted Action time can be adjusted 2 sets of normally open and normally closed contacts 2 indicator lights indicate various working conditions Typical applications: dc motor, battery,UPS power supply, dc switchgear, dc panel, industrial control system Specification:Protection function: over voltage, under voltageModel: DVRD - 12/24/36/48(Optional)Rated voltage: DC 12V/24V/36V/48V(Optional)Monitoring circuit: direct current circuitProtection function: over voltage, under voltageOvervoltage regulation range: DC 12V: 13-17VDC 24V: 26-34VDC 36V: 39-51VDC 48V: 52-68VUndervoltage adjustment range: DC 12V: 10-14VDC 24V: 20-28VDC 36V: 30-42VDC 48V: 40-56VAction delay range: 0.1-15sDisplay mode: normal, action 2 LED lights indicate the working statusContact form: 2 set of normally open and normally closed contactsContact capacity: 6A 250VAC (resistivity)Installation: 35mm guide railOverall dimension: Approx. 79 * 23 * 79mm / 3.1 * 0.9 * 3.1inWeight: 200 g / 7.1 oz(approx.) Package list: 1 x Overvoltage Undervoltage Protector Note:Please note that the type and old type of this product will be sent randomly, and make sure you will not mind before ordering.