• Optimized for transformers with high stability against through faults.
• Features 2nd and 5th harmonic blocking and numerical CT ratio correction.
• Selectable connection groups and disturbance recorder included.
• Optional arc flash sensor interface for high-speed trip in case of cable termination faults.
• Supports various communication protocols such as SPA Bus, Profibus, Modbus, Modbus TCP, IEC 61850, IEC 60870-5-101, IEC 60870-5-103, TCP/IP, DeviceNet, and DNP 3.0.
• VAMPSET software available for parameter setting and configuration.

Vamp protection relays are used for selective protection in subtransmission lines, medium voltage overhead and cable feeders, motor feeders, transformer feeders, capacitor banks, generators, reactors, and busbars in power system distribution substations, power plants, industrial power systems, and marine and offshore installations.

• Currents: IL1, IL2, IL3, L1 angle, L2 angle, L3 angle, and their winding and differential counterparts.
• Residual current I0 (%) and harmonics measurements.

• Includes IEC 61850, IEC 60870-5-101, IEC 60870-5-103, Transparent TCP/IP, Modbus TCP, Modbus RTU, Profibus DP, SPA, DNP 3.0, and DeviceNet.

• Auxiliary voltage: 40…265 V ac/dc (optionally 18…36 Vdc).
• Rated phase and neutral current: 1A or 5A with specific measuring ranges.
• Thermal withstand: 4 x In (continuous), 100 x In (for 1 s).
• Rated frequency: 45…65 Hz with a measuring range of 16…75 Hz.
• Digital inputs and trip/control contacts with specified internal operating voltage.

• Emission and immunity standards: EN 55022, IEC 60255-22-1, IEC 60255-11, EN 61000 series.
• Insulation, surge voltage, and vibration shock tests: IEC 60255-5, IEC 60255-21-1.
• Operating temperature: -10…+55° C, relative humidity <95%.
• Degree of protection: IP30, optionally IP54.

• Overcurrent, differential overcurrent, current unbalance, thermal overload, magnetising inrush, transformer overexcitation, and earth-fault protection stages.
• Programmable stages and optional arc protection stages.

• Disturbance recorder for all analogue channels and binary inputs/outputs.
• Phase unbalance, circuit breaker failure protection, trip circuit supervision, and latched trip features.