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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | TimeMark |
| Manufacturer Product Number | 253 |
| Description | Phase Monitor Relay; Phase Reversal; 3-Phase; 208-480V AC; 1C SPDT |
| Datasheet | Download Datasheet |
The TimeMark 253 is a reverse phase relay for 208-480 V AC, 50/60 Hz systems. It drops its output relay out on phase reversal and resets once the fault clears.
Trip delay: phase loss / reversal 0.05 s. Reset: automatic.
Output: 1C SPDT, 10 A at 240 V AC resistive. Mounting: plug-in, on an 8-pin octal (TimeMark 51X120 socket) base. Indicator: A B C indicator (lit with proper phase rotation). Approvals: UL Recognized and CSA Certified. It operates from -7 to +55 °C.
| Category | |
| Manufacturer | TimeMark |
| Monitoring Function | Phase Reversal |
| Number of Phases | 3-Phase |
| Input Voltage | 208-480V AC |
| Trip Delay - Phase Loss and Reversal (ms) | 0.05 s |
| Reset Method | Automatic |
| Status Indicator | A B C indicator (lit with proper phase rotation) |
| Contact Configuration | 1C SPDT |
| Output Rating | 10 A at 240 V AC resistive |
| Number of Poles | 1 |
| Mounting Type | Socketable |
| Termination Style | Plug In, 8 Pin (Octal) |
| Dimensions | 3.52" overall (2.88" body) x 2.44" x 1.75" (tolerance ± 0.06) |
| Socket Family | 8 Pin Octal (TimeMark 51X120 socket) |
| Operating Temperature (Storage) (°C) | -7...+55 |
| Approvals | UL Recognized and CSA Certified |