VL-VCM-01 — Voltage & Current Monitoring Relay, True RMS
The monitoring relay adopts a specialized chip for AC and DC sampling, allowing it to measure single-phase or three-phase voltage, frequency, and current in the power grid. It can set over- and under-limit values based on actual site conditions, ensuring the working voltage and current of terminal equipment are fully controllable. This relay is suitable for protecting electrical equipment against overvoltage, undervoltage, overcurrent, and undercurrent. It supports a wide range of operating voltages (AC/DC 24–240V), comes in a compact 18mm width for easy installation on standard 35mm DIN rails, and provides high measurement accuracy through true RMS readings. Voltage and current transformation ratios are adjustable, while real-time monitoring values are clearly displayed. The intuitive digital display and flexible function buttons make operation convenient and allow users to adjust settings as needed.
| Parameter | Specification |
|---|---|
| Operating voltage | AC 24–240V (50–60Hz) / DC 24–240V |
| Setting method | Digital display, button adjustment — voltage accuracy 1, current accuracy 0.1 |
| Detection range | Voltage 24–240V (freq. 40–65Hz) · Current: single-phase 0.02–16A / three-phase 0.02–5A (extendable via external CT) |
| Limit range | ±10% (voltage 22–275V/30–275V; current 0.02–20A/0.02–6A) |
| Delay time | 0.5–29.9s (2–29.9s for AC/DC auto-detect variant) |
| Recovery value | 3–19% |
| Detection accuracy | Voltage ±1V (100V); current ≤1%; temp <0.05%/°C |
| Reset time | < 1s (2s for AC/DC auto-detect) |
| Contact rating | 10/16A, AC1-resistive |
| Electrical life | 1×10⁵ (resistive load, 1s on / 9s off) |
| Environment | Working -10 to 55°C, ≤85% RH, ≤2000m · Storage -20 to 75°C |
Protecting terminal equipment against overvoltage, undervoltage, overcurrent and undercurrent, with adjustable thresholds fitted to actual site conditions.
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Low-Voltage Switchgear & Controls
Low-voltage power protection & control for importers, distributors and OEMs worldwide.