ZLV feature a complete package of functions and protection schemes offering selective, quick and reliable protection both for underground and overhead lines, with or without series compensation.
FIT provides breaker failure protection by measuring the current flowing through the bay to determine the breaker status. The breaker is considered open only when the current flow ceases. The FIT main feature is the fast reset speed after breaker opening, ensuring consistent operation
ZLS provides distance protection for lines with shifting operating conditions (loads, short circuit power, load direction, power supply conditions, etc.) rendering impossible the use of overcurrent protection, even wtih directionality.
The most important features of the bus differential protection are speed and stability under external faults. The DBN provides reliable operation for this critical application, where the large number of circuits involved can cause major disturbances in the grid and the loss of service of major load centers.
8PRN recorders cover oscillographic applications requiring very high performance signal acquisition and data storage, where the recording functions of digital relays do not meet the application requirements.
