The 256-575 is a three-phase voltage and phase sequence monitor with a SPDT relay output rated at 8 A/250VAC, designed for DIN rail mounting. It operates on input voltages up to 3×575 V, with a minimum threshold adjustable between 70% and 95% of nominal voltage and a cutoff at 60%. It features a fixed 500 ms time delay (T1) and an adjustable time delay (T2) from 0 to 10 seconds. Fault conditions trigger a red LED and relay open circuit, while a green LED indicates supply presence. The device supports operation with only two phases connected, and includes dielectric strength of 4 kV, IP40 protection, and operates from -20°C to +55°C. It meets UL, CE, and RoHS standards and has a mechanical life of 10 million operations and an electrical life of 100,000 operations.
| Quarktwin Technology Ltd. | |
|---|---|
| Product Category | Protective Relays and Monitoring Relays |
| Product Number | 256-575 |
| Product Name | Monitor - Relay Output |
| Approvals | RoHS |