The specific application can be chosen by parameterization. In this way an optimal adaption of the relay to the protected object can be achieved.
In addition to the differential function a backup overcurrent protection for 1 winding / star point is integrated in the relay. Optionally, a low or high-impedance restricted earth-fault protection, a negative sequence protection and a breaker failure protection can be used. With external temperature monitoring boxes (thermo-boxes) temperatures can be measured and monitored in the relay. Therefore, complete thermal monitoring of a transformer is possible, e.g. hot-spot calculation of the oil temperature. The relays provide easy-to-use local control and automation functions. The integrated programmable logic (CFC) allows the users to implement their own functions, e.g. for the automation of switchgear (interlocking). User-defined messages can be generated as well. The flexible communication interfaces are open for modem communication architectures with control system.
The protection relay can be parameterized for use with three-phase and single-phase transformers. In addition to this, a thermal replica is integrated for the supervision of the ohmic losses in the plant.
- 7 current transformers, 1 IEE
- 3 binary inputs
- 4 binary outputs
- Text display
- Surface-mounting or flush-mounting housing
- System port
– IEC 61850
– IEC 60870-5-103
– DNP 3.0
– MODBUS RTU
- Service port
– DIGSI 4
- Front port
– DIGSI 4
- Time synchronization via IRIG B, DCF77 or system interface