Clearly identify the voltage in each of MV switchgear bay makes a significant contribution to improve work safety!
In the typical MV switchgears voltage transformers (VT) are used for the voltage measurment. In practice there are many installations where, due to the switchgear size minimalization need, using of VT’s is very difficult and often impossible. The cost of VT’s also important, especially in simple switchgears.
The optimum solution for obtaining information about the presence of voltage in MV switchgear buys is using of voltage indicators operating with capacity insulators.
Energotest in this field offers a wide range of products suitable for different needs.
WNd — Compact version indicator
Basic characteristics of indicator WNd:
- Fulfills the requirements of PN-EN 62271-206:2011,
- Operate with capacitive insulators of various manufacturers,
- Sensitivity of the indicator set in factory to adjust to the insulator parameters. Accepted level of insulator output currents are in range of 20...500µA,
- Has integrated structure (has plug-in socket and optical indicators),
- The presence of voltage is signaled independently for each phase by LED’s,
- Detection system does not need a separate power supply source, energy is received from capacity insulators ,
- Monochromatic, transparent casing,
- Protection degree is IP 40
WN — Version with improved IP protection degree standard
Basic characteristics of indicator WNd:
- Fulfills the requirements of PN-EN 62271-206:2011,
- Ooperate with capacitive insulators of various manufacturers,
- Sensitivity of the indicator set in factory to adjust to the insulator parameters. Accepted level of insulator output currents are in range of 20...500µA,
- Has integrated structure (has plug-in socket and optical indicators),
- The presence of voltage is signaled independently for each phase by LED’s,
- Detection system does not need a separate power supply source, energy is received from capacity insulators ,
- Protection degree is IP 54 .
WN—IEC — Indicator accordance with PN-EN 61243-5 standard, self-test system and LCD voltage presence
Basic characteristics of indicator WN-IEC:
- Fulfills the requirements of PN-EN 61243-5 standard (work under voltage - indicator systems of voltage presence) and PN-EN 62271-206 standard (medium voltage devices -voltage indicators systems), Operate with capacitive insulators of various manufacturers
- Sensitivity of the indicator set in factory to adjust to the insulator parameters. Accepted level of insulator output currents are in range of 8 ... 500μA,
- Has integrated structure (has plug-in socket and optical indicators),
- The presence of voltage is signaled independently for each phase phase on liquid crystal display,
- Detection system does not need a separate power supply source, energy is received from capacity insulators,
- Equipped with a self-test system (also operating in the absence of voltage),
- Increases operator safety - Plug-in sockets are protected by a spark gap, which reduces the voltage on the sockets in case of a capacity insulator failure,
- It has standard output on plug-in sockets (2.5 μA 5v) suitable for dis connected type; LRM voltage and LRM phases.
- Protection degree is IP 54