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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 | 20AB |
| Description | Phase Monitor Relay; 3-Phase; 190-480V AC; 1 NO + 1 NC (isolated) |
| Datasheet | Download Datasheet |
The TimeMark 20AB 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 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 (over, under and unbalance); 1 s fixed on single phasing or unbalance over 15%. Restart: 1-500 s (adjustable). Reset: automatic.
Output: 1 NO + 1 NC (isolated), 5 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 |