Measurement Functions Of The Relay; Output Relay And Blocking Functions - VAMP 140 Operation And Configuration Instructions

VAMP Ltd
2.3.
2.4.
VM140.EN011
Overcurrent and earth-fault relay
Technical description

Measurement functions of the relay

Measured values
Phase currents I , I
L1
Measuring range
Residual current I
0
Measuring range
Frequency f
Measuring range
Calculated values
From the measured values the relay calculates the following:
IL
•
I2/I1, I2/In
•
IL1rms, IL2rms, IL3rms, Ilrms
•

Output relay and blocking functions

In the VAMP 140 relay all start and trip signals of the
protection stages can be freely routed to the output relays and
operation indicators according to the requirements of the
application. The functions can also be blocked and for this
purpose both internal relay signals and external control signals
can be used. Figure 2.4-1 shows the operating principle of the
grouping and blocking matrix.
Figure 2.4-1 Operating principle of the grouping and blocking matrices.
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I
L2, L3
0 – 50 x In
0 – 5 I
0n
16 - 65 Hz
VAMP 140
In = 1A or 5A
I = 1A or 5A
0n
21