VAMP Ltd
Motor protection relay
Technical Description
VAMP 150
VM150.EN005 Vamp 24h support phone : +358 (0)20 753 3264
25
2.3. Measurement functions of the relay
Measured values
Phase currents I
L1
, I
L2,
I
L3
Measuring range 0 – 50 x In In = 1A or 5A
Residual current I
0
Measuring range 0 – 5 I
0n
I
0n
= 1A or 5A
Frequency f
Measuring range 16 - 65 Hz
Calculated values
From the measured values the relay calculates the following:
•
IL
•
I2/I1, I2/I
MOT
•
I_fault
2.4. Output relay and blocking functions
In the VAMP 150 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.
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