Ohmic Voltage Sensor

Ohmic Voltage Sensors

The ohmic voltage sensor is engineered for mounting as an end piece in the plug set, providing a precise and compact measurement solution for medium-voltage applications. The modular design allows straightforward use in both new installations and retrofits, ensuring adaptability to a wide range of system requirements.

Electrical Characteristics

• Operating voltage: 12, 24, 36, or 72 kV

• Accuracy classes: Measured value deviation of 0.2% or 0.5%, depending on application requirements

• Secondary voltage: 3.25 V (standardized output for monitoring equipment)

• Connection interfaces: Pluggable BNC connector or RJ45 interface on the secondary side, providing secure, low-noise signal transmission and simplified integration with digital systems

• Thermal stability: The sensors are designed to maintain high accuracy across a wide temperature range, ensuring minimal drift under varying operating conditions

Application Areas

The sensors are optimized for indoor applications, including:

• Medium-voltage switchgear, where precise voltage measurement supports protection relays, control, and automation

• Transformers, enabling continuous monitoring, diagnostics, and fault detection

• Secondary systems, particularly in grid automation and digital substations, where stable and accurate signals are essential

Compatibility

The sensor design ensures mechanical and electrical compatibility with widely used connector sets and components from leading manufacturers, including:

• Balanced plugs

• Nexans

• NKT

• Südkabel

• TE Connectivity

Performance and Reliability

Utilizing advanced resistive divider technology, INDISOL voltage sensors deliver long-term measurement stability, excellent linearity, and minimal influence from temperature variations. Their robust construction allows for extended service lifewith low maintenance requirements, while the standardized output simplifies integration into existing monitoring and control systems.

These characteristics make INDISOL ohmic voltage sensors a trusted choice for engineers who demand precision, thermal stability, and compatibility with established medium-voltage networks up to 72 kV.