VersiSafe
15
6.5
Characteristics
Derating curve for contact currents of safety contacts
7.
Commissioning
7.1
Terminal connections
The VersiSafe has to be connected according to connection examples or in a similar way. The
connection of DC- motors is made as with single phase AC-motors.
L1 - L2 - L3
The measuring wires L1-L2-L3 have to be connected directly to the windings of the monitored
motor (not via transformers) in order to provide a correct broken wire detection for the connection
wires and motor windings.
The motor windings must not be disconnected from the measuring wires by motor contactors,
because broken wire detection is activated and standstill monitoring is disabled.
Interference to the measuring wires should be avoided as no standstill may be detected by the
VersiSafe. If possible the measuring wires should be run separately from the motor wires or
screened wires should be used. In this case the screen can be connected at the motor side.
Quadratic total current
M9658
20
I
2
(A )
2
= I
2
+ I
2
+ I
2
1
I , I , I - current in contact paths
1
2
3
(5 5 +5 = 75A )
2
2
2
2
+
(2
+2 = 12A )
2
2
2
2
+2
2
3
60
70
80
50
40
0
10
20
30
40
60
50
30
T ( C)
10
°
max. permitted current up to 40
˚
Con 3 contact paths = 5A
max. permitted current up to 60
˚
Con 3 contact paths = 2A
Содержание VersiSafe
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