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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 | 20M/SG |
| Description | Phase Monitor Relay; 3-Phase; 190-480V AC; 10 A at 240 V AC resistive |
| Datasheet | Download Datasheet |
The TimeMark 20M/SG is a 3-phase monitor for 190-480 V AC, 50/60 Hz systems. It drops its output relay out on phase loss, phase reversal, over/under voltage and voltage unbalance and holds it out until it is reset by hand.
Trip points: undervoltage 90% of the setting ±1% (resets at 93%); overvoltage 110% of the setting ±1% (resets at 107%); unbalance 2-8% adjustable (resets 0.7% below the setting). Trip delay: undervoltage 1-30 s (adjustable). Restart: 1-500 s (adjustable). Reset: manual.
Output: 1C SPDT (silver with gold flash), 10 A at 240 V AC resistive. Mounting: DIN rail or surface mount. Indicator: LED STATUS - Red: UNDER = on continuously; OVER, UNBAL / SINGLE PH, REVERSE PHASE = distinct blink patterns. Green: RUN = on continuously; RESTART DELAY = blinking. Approvals: UL Recognized (U.S. and Canada).
| Category | |
| Manufacturer | TimeMark |
| Model | 20 |
| Monitoring Function | Phase Loss, Phase Reversal, Over/Under Voltage and Voltage Unbalance |
| Number of Phases | 3-Phase |
| Input Voltage | 190-480V AC |
| Undervoltage Trip Range | 90% of the setting ±1% (resets at 93%) |
| Overvoltage Trip | 110% of the setting ±1% (resets at 107%) |
| Phase Unbalance Trip | 2-8% adjustable (resets 0.7% below the setting) |
| Restart Delay (s) | 1...500 s (adjustable) |
| Trip Delay - Undervoltage (s) | 1...30 s (adjustable) |
| Reset Method | Manual |
| Status Indicator | LED STATUS - Red: UNDER = on continuously; OVER, UNBAL / SINGLE PH, REVERSE PHASE = distinct blink patterns. Green: RUN = on continuously; RESTART DELAY = blinking |
| Contact Configuration | 1C SPDT (silver with gold flash) |
| Output Rating | 10 A at 240 V AC resistive |
| Number of Poles | 1 |
| Mounting Type | DIN Rail or Surface Mount |
| Dimensions | 3.91" x 1.78" (3.16" between mount slots) x 2.30" H, 2.20" wide body; .20" x .31" slot 2 places; tolerance ± 0.06 |
| Approvals | UL Recognized (U.S. and Canada) |