NOLA-03-M arc protection relay

The arc protection relay NOLA-03-M with extension unit NOLA-02-S is designed to be used for the protection of medium- and low-voltage switchgear to increase personnel safety and minimise equipment damage. The central unit NOLA-03-M operates independently or together with the extension unit NOLA-02-S. This unit helps to create a selective arc protection system, increasing the number of sensors and extending the protected area.

Features

• Three-phase overcurrent function as an additional criterion for trip decision
• Loop-type fibre arc sensor for arc detection and light intensity measurement
• Two high-speed semiconductor outputs for fast tripping (≤ 2.5 ms), much faster than conventional protection relays
• Two relay outputs for trip signalisation and circuit breaker failure protection
• Two fibre-optic or RS-485 interfaces for connecting other master or slave units (up to 16)
• 5-button membrane keyboard for local configuration
• Informative OLED display and 9 LED indicators for reliable information at low temperatures
• USB port for PC configuration, event evaluation and software upgrades
• Event logs (650 events) and real-time clock
• Configured by the free NOLASET software tool
• Continuous self-supervision and monitoring of sensor fibres, operating voltages and cabling between master and slave units