The Voltage Indicating and Control Unit with Phase Comparator (Model VIU 09A) is an advanced device engineered for accurate voltage indication, control, and phase monitoring in medium and high-voltage systems up to 36 kV. Featuring a self-powered red-LED display, this unit ensures dependable voltage visualization without external power dependencies. Its integrated LRM-type phase comparator provides precise phase detection with a 14 mm center distance, making it ideal for synchronization, protection, and control applications. Built with a compact and robust design, the VIU 09A supports multiple auxiliary supply options and dual changeover relay outputs, making it highly adaptable for various industrial and power distribution networks.
| Parameter | Specification |
|---|---|
| Model | VIU 09A |
| Line Voltage | 3.3 kV to 36 kV |
| Coupling Capacitance | 3.3 kV – 600 pF; 6.6 kV – 300 pF; 11 kV – 150 pF; 22 kV – 75 pF; 33 kV – 50 pF |
| Indication | Self-powered red-LED |
| Dimensions | 96 mm x 48 mm x 160 mm |
| Panel Cutout | 92 mm x 46 mm |
| Auxiliary Supply | 24 VDC / 30 VDC / 48 VDC / 85–270V AC/DC (any one as required) |
| Phase Comparator | LRM type with 14 mm center distance |
| Voltage at Comparator | 4–5 VAC at Threshold Voltage, 7 VAC at Nominal Voltage |
| Relay Output Contact Rating | 2 Changeover relays (common for all 3 phases): 1.5 A at 250 VAC, 2 A at 30 VDC |
| Voltage Setting | Factory set as per requirement |
| Relay Logic | Configurable per application |
