The NA60 protection relay can be used on radial and/or meshed MV and LV networks, providing reliable protection for power lines and transformers. It offers protection on radial, ring or parallel lines of any length in systems with a grounded, ungrounded, Petersen coil and/resistance grounded systems.
It also provides effective ground fault protection for generators connected directly to the same busbar. Undervoltage and overvoltage functions are integrated as voltage protection or control, ensuring optimal system operation. The relay can be supplied with phase current input circuits suitable for both conventional CT and TV or combined Thysensor devices. Both versions are certified for use as general protection of users connected to the MV distribution network in accordance with the Italian standards CEI 0-16 in applications where maximum directional and non-directional phase and directional earth current protection functions are provided.
Features of the NA60 general protection relay
The Thytronic NA60 protection relay has several functions designed to ensure the safety of power lines and transformers. These standard protection and control functions include under voltage monitoring, thermal imaging for Line/Transformer, and phase overcurrent, residual overvoltage and overcurrent monitoring. The relay is also capable of handling directional phase overcurrent, as well as offering ground directional overcurrent and detecting failure to open the breaker.
In addition, the NA60 relay provides CT and VT phase line monitoring, as well as trip circuit supervision. Optionally, a hardware package is available for protection function 26 to measure machine temperature using Pt100 thermometer probes. The relay also has a USB type B port to facilitate communication with ThyVisor configuration software.
...
