VAMP Ltd
Feeder and motor manager
Technical description
VAMP 257
VM257.EN002
VAMP 24h support phone : +358 (0)20 753 3264
75
the breaker within the request timeout setting. See below the
figure.
Figure 2.3.24-1 The principle of the synchrocheck function
Please note that the control pulse of the selected object should
be long enough. For example, if the voltages are in opposite
direction, the synchronising conditions are met after several
seconds.
Figure 2.3.24-2. The block diagram of the synchrocheck and the controlling
object
Please note that the wiring of the secondary circuits of voltage
transformers to the relay terminal depends on the selected
voltage measuring mode.
Voltage
input
Terminals
Signals in
mode
“2Line+Uo”
Signals in
mode
“2Side+Uo”
Signals in
mode
“2Side”
Signals in
mode
“3Side”
Ua
X1:11-12
U12 U12 U12 U12
Ub X1:13-14
U23
U12y
U23
U12y
Uc
X1:17-18
Uo Uo U12y
U23z
No sync.
stages
One sync.
stage
available
One sync.
stage
available
Two
stages
available
Uo stages
available
Uo stages
available
No Uo stages
No Uo
stages
3-phase
power
1-phase
power
3-phase
power,
symmetrical
condition
1-phase
power