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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 | 20VB |
| Description | Phase Monitor Relay; 3-Phase; 190-480V AC; 1C SPDT |
| Datasheet | Download Datasheet |
The TimeMark 20VB 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 resets once the fault clears.
Trip points: undervoltage 185-480 V AC (scales 185-240 V AC and 370-480 V AC); overvoltage 208-528 V AC (scales 208-264 V AC and 416-528 V AC); unbalance 6%, fixed. Adjustment: field adjustable. Trip delay: undervoltage 1-30 s (adjustable). Restart: 1-500 s (adjustable). Reset: automatic.
Output: 1C SPDT, 10 A at 240 V AC resistive. Mounting: DIN rail or surface mount. Indicator: 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 |
| 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 | 185-480V AC (scales 185-240V AC and 370-480V AC) |
| Undervoltage Trip Adjustment | Field adjustable |
| Overvoltage Trip | 208-528V AC (scales 208-264V AC and 416-528V AC) |
| Phase Unbalance Trip | 6%, fixed |
| Restart Delay (s) | 1...500 s (adjustable) |
| Trip Delay - Undervoltage (s) | 1...30 s (adjustable) |
| Reset Method | Automatic |
| Status Indicator | RED: UNDER = on continuously; OVER, UNBAL / SINGLE PH, REVERSE PHASE = distinct blink patterns. GREEN: RUN = on continuously; RESTART DELAY = blinking |
| Contact Configuration | 1C SPDT |
| Output Rating | 10 A at 240 V AC resistive |
| Number of Poles | 1 |
| Mounting Type | DIN Rail or Surface Mount |
| Dimensions | 3.91" x 2.20" x 2.30" H (3.18" / 1.78" mounting, .20" x .31" slot 2 places; 2.70", 1.19") |
| Approvals | UL Recognized (U.S. and Canada) |