The CVI-2R voltage detecting and indicating system is designed for continuous indication of voltage on medium-voltage switchgear busbars. It provides continuous voltage presence indication and voltage absence verification in accordance with IEC 62271-213:2021. The device supports dual-stage voltage indication and overvoltage indication to improve operational safety during switching and maintenance procedures.
The front panel features two LED indicators and two dedicated pushbuttons for self-test and voltage presence verification. An integrated three-phase LRM measuring point supports phase comparison and phase sequence verification for safe commissioning and maintenance. An adjustable capacitance module is provided to optimize the capacitive voltage division ratio. Two relay outputs are available for alarm, interlock, and remote indication applications. With a compact 96× 48mm design and a wide auxiliary power supply range of 85–265 Vac/dc, the CVI-2R is suitable for various switchgear installations.
The CVI-2R voltage detecting and indicating system is designed for continuous indication of voltage on medium-voltage switchgear busbars. It provides continuous voltage presence indication and voltage absence verification in accordance with IEC 62271-213:2021. The device supports dual-stage voltage indication and overvoltage indication to improve operational safety during switching and maintenance procedures.
The front panel features two LED indicators and two dedicated pushbuttons for self-test and voltage presence verification. An integrated three-phase LRM measuring point supports phase comparison and phase sequence verification for safe commissioning and maintenance. An adjustable capacitance module is provided to optimize the capacitive voltage division ratio. Two relay outputs are available for alarm, interlock, and remote indication applications. With a compact 96× 48mm design and a wide auxiliary power supply range of 85–265 Vac/dc, the CVI-2R is suitable for various switchgear installations.
| Parameter | Value |
| Power supply | 85-265Vac/dc |
| Rated voltage | 1kV -35kV |
| Power consumption | Less than 2W |
| Voltage threshold | 10% to 45%Un |
| Capacitance Module | 200pF/ 125pF /80pF/ 45pF |
| Rated frequency | 50-60Hz |
| Relay output | 2 channel, passive, dry contact, normally open
Load capacity: 10A @250Vac/5A@ 30Vdc |
| LED indicator | Ultra-high brightness LED
operating voltage < 2.5Vdc, service life > 50,000 hours. |
| Insulation | Input, output, power supply to shell >5MΩ |
| Withstand voltage | 2 kV AC RMS 1 minute, between power supply to ground/ between relay contact to ground. |
| Standards | Compliant with IEC 62271-213 |
| Installation dimension | WxHxD: 96x48x66mm |
| Working environment | -25~70°C, Altitude ≤2000m,
0~95%RH, non-condensing, non-corrosive gas |
Adaptation capacity parameter table:
| Voltage Level (kV) | 6 | 10 | 24 | 35 |
| Adaptable Capacitance (pF) | 200(±15) | 125(±15) | 80PF(±10) | 45(±10) |
| Dimension (Height * Width) | 140x95mm | 210x110mm | 320x145mm | |
The CVI-2R capacitive voltage indicator operates on the principle of capacitive coupling. An electrode connected to each medium-voltage phase conductor forms a coupling capacitance with the primary conductor and, together with the circuit capacitance to earth, establishes a capacitive voltage divider. This converts the primary voltage into a low-level sensing signal without a direct conductive connection to the high-voltage conductor.
The CVI-2R processes the three-phase sensing signals and indicates voltage status according to preset thresholds, including dual-stage voltage indication and overvoltage indication. Dedicated self-test and voltage verification buttons support functional checks and voltage absence verification, while the three-phase LRM test interface enables phase comparison and phase sequence verification. Relay outputs provide additional interfaces for remote indication and interlocking.
