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VAMP Ltd
Feeder and motor manager
Technical description
VAMP 257
VM257.EN002
VAMP 24h support phone : +358 (0)20 753 3264
5
1.
Introduction
This part of the user manual describes the protection functions,
provides a few application examples and contains technical
data.
Mounting and commissioning instructions are given in a
separate mounting and commissioning manual
(VMMC.EN0xx).
Manual revision history:
VM257.EN001 First
revision
VM257.EN002
Programmable inverse delay curves
1.1.
Application
The numerical VAMP 257 feeder and motor manager includes
all the essential protection functions needed to protect feeders
and motors in distribution networks of utilities, industry,
power plants and offshore applications. Further, the manager
includes several programmable functions, such as arc (option),
thermal, trip circuit supervision and circuit breaker protection
and communication protocols for various protection and
communication situations.
I/O
110 kV network
20 kV overhead line
20 kV cable
network
Power
plants
400kV/200 kV
transmission
network
Distribution
substation
230/400V
Distribution transformer
230/400V
Secondary
substation
(distribution
transformer)
Remote control
Protection
relay
Protection
relay
Circuit
breaker
Transmission
substations
Remote Control Interface
VAMP257_ Sovelluskuva
Figure 1.1-1. Application of the feeder and motor managers
The VAMP feeder terminals can be used for selective short-
circuit feeder protection of radial or meshed feeders regardless
of the earthing principle of the network. The manager can also
be used for single-, two- or three-phase directional or non-
directional overcurrent and/or sensitive, directional or non-