VAMP 257 - Industrial Feeder Protection; Parallel Line Protection

VAMP 257 Feeder and motor manager
Technical description
VAMP Ltd
106
VAMP 24h support phone : +358 (0)20 753 3264
VM257.EN002
3.2. Industrial feeder protection
VAMP257
3
3
vamp257app2
VAMP257
Figure 3.2-1 VAMP feeder and motor managers used in cable protection of
an industry plant network
Directional earth fault protection and three-phase overcurrent
protection is required in a cable feeder. Furthermore, the
thermal stage can be used to protect the cable against
overloading. This example also includes fast arc protection.
3.3. Parallel line protection
R1
R3
R4
R2
A
B
SUPPLY
LOAD
LOAD
LOAD
LOADLOAD/SPARE SUPPLY
VAMP 245
VAMP 245
VAMP 257
R5
vamp257appl_parall_lines
VAMP 257
VAMP 257
Figure 3.3-1. Feeder and motor manager VAMP 257 used for protection of
parallel lines.
Figure 3.3-1 shows two parallel lines, A and B, protected with
overcurrent relays R1, R2, R3 and R4. The relays R3 and R4
are directional.