Bulletin 813S Voltage monitoring relay is supplied by HuaShengBoYe with verified origin and traceable batch information. We quote against your BOM, confirm packaging and date codes, and ship worldwide from Shenzhen.
Main functions Real time monitoring of line voltage, detecting overvoltage, undervoltage, phase loss, phase sequence errors, and phase imbalance. Built in 300 ms delay filter, shielding 20 ms level instantaneous drops, significantly reducing false alarms. ? Adjustable threshold: Set the undervoltage, overvoltage action values, and delay time through the front panel knob or DIP switch. Output: 1 set of conversion contacts (SPDT), 5 A, 250 V under AC-15; DC-13 with 5 A and 30 V. ? Status indication: Multi color LED displays the real-time status of power supply normal, fault, and relay action. Technical Specifications ? Input voltage range: 208... 480 VAC (50/60 Hz), available in models such as 24 VAC/DC and 600 VAC. ? Frequency range: 45... 65 Hz (expandable to 400 Hz). Accuracy: ± 2% (set value). Response time: ≤ 500 ms. Electromagnetic compatibility: Complies with IEC/EN 61000-4-x Level 4 (ESD 8 kV air, surge 2 kV L-E). Working temperature: -20...+60 ° C; Storage temperature: -40...+85 ° C. ? Protection level: Front panel IP20; Optional NEMA 4X/IP66 enclosure. Installation and wiring DIN rail or panel screw installation, with a width of only 22.5 mm, saving control cabinet space. Tool free spring terminals, supporting 0.2... 2.5 mm 2 single/multi strand wires, easy to maintain. Combined with Allen Bradley electronic overload relays and contactors, a complete solution of "motor protection+voltage monitoring" can be formed. Typical Applications Motor Control Center (MCC): Install 813S in the main circuit to prevent motor burnout caused by power grid abnormalities. Generator set: detects voltage/phase sequence abnormalities during the switching between mains and generator. Pump station, fan, compressor: Avoid motor overload or mechanical damage caused by undervoltage operation. Distribution room and substation: used for monitoring the quality of power supply and improving the reliability of power supply
Send the part number, quantity and target date. We confirm stock or lead time, offer an alternative if the exact line is unavailable, and issue a commercial invoice with HS code for export.
Send us your BOM or part numbers — we reply within one business day.
Contact us
