VL-VPR-RU8(X)(S)-X(K)3X(K)4 — Three-Phase Voltage Protection Relay
This phase protection relay is designed for AC circuits (50/60Hz) to safeguard electrical equipment against abnormal conditions such as reversed phase, phase failure, over/undervoltage, and voltage imbalance. It ensures fast and reliable protection for downstream devices.
It features real-time LED status indication, supports three-phase three-wire or four-wire configurations, and monitors its own working voltage and frequency (45–65Hz). Available in fixed, rotary, or LED types, the compact 18mm width design allows easy installation on standard 35mm DIN rails, making it ideal for control panels and distribution cabinets.
Key Features
- Protects against phase failure, phase reversal, over/undervoltage and voltage imbalance
- Three-phase three-wire (X3/K3/XK3/SK3) and four-wire (X4/K4/XK4/SK4) variants
- Fixed-indicator, rotary-adjustable or digital LED display types
- Self-monitors its own working voltage and frequency (45–65Hz)
- Compact 18mm width, standard 35mm DIN rail installation
Technical Specifications
| Parameter | 3-wire (X3/K3/XK3/SK3) | 4-wire (X4/K4/XK4/SK4) |
|---|---|---|
| Working voltage range | 220–480V | 165–265V (indicator/rotary) or 60–265V (LED) |
| Over/under-voltage threshold | fixed 380V±15% or adjustable 285–475V / 300–480V | fixed 220V±15% or adjustable 170–270V / 65–265V |
| Voltage imbalance | fixed 8% or adjustable 5–19% | fixed 8% or adjustable 5–19% |
| Voltage fault action delay | 3s (fixed) or 0.1–19.9S (adjustable) | 3s (fixed) or 0.1–19.9S (adjustable) |
| Phase sequence / phase-failure delay | <1s (below 260V judged as phase failure) | <1s (below 70V judged as phase failure) |
| Recovery time | 1s | 1s |
| Power-on delay | 1.5s (fixed) or 1–19.9S (adjustable) | 1.5s (fixed) or 1–19.9S (adjustable) |
| Voltage recovery hysteresis | 3% (fixed) or 2–19% (adjustable) | 3% (fixed) or 2–19% (adjustable) |
| Output | 5A/16A, 1×SPDT, AC1-resistive | |
| Electrical life | 1×10⁵ (resistive load, 1s on / 9s off) | |
| Environment | Working -10 to 40°C, ≤85% RH, ≤2000m · Storage -20 to 75°C |
Applications
Downstream equipment protection in three-phase circuits against reversed phase, phase failure, over/undervoltage and voltage imbalance.
Downloads
Technical documentation for this product (datasheet, type-test report, CAD drawing) is being finalized and will be published here shortly. Need it sooner? Contact us via the Request a Quote form and our team will send it directly.
Packaging & Logistics
Packaging details, minimum order quantity, lead time and HS code for this product are being finalized and will be published here shortly. Need this information sooner? Contact us via the Request a Quote form.