Digital protection relay
VAMP 135 Vamp

The VAMP 135 presents a very cost-effective protection scheme. The relay includes a combination of voltage and frequency protection functions. The relay is ideal in power plants, utilities and industrial plants.

Connection modes

Phase Mode

The relay is connected to phase voltages UL1, UL2 and UL3.

The main voltages are calculated using the measured phase voltages.

The residual voltage is calculated using the measured phase voltages.

No open-delta transformer is needed.

Line Mode

The relay is connected to line voltages U12, U23 and U31.

The residual over voltage stages U0> and U0>> are not available.

Line Mode+U0

The relay is connected to main voltages U12, U23 and to a residual voltage U0.

The line voltage U31 is calculated using the two measured line voltages.