Installation, connection and commissioning
31
VMD460-NA_D00001_05_M_XXEN/01.2020
Explanation
Initial state: The system is disconnected. RT1 and RTG have no connection. This keeps
the VMD460-NA in the alarm state (remote trip active).
The ripple-control receiver gets an impulse from the network control centre and oper-
ates relay K4, which goes into self-locking mode. From now on, reconnection is enabled
(reconnection depends on VMD460-NA: fault, alarm, delay time for connection etc…).
As soon as the VMD460-NA reconnects the system, relay K3 is operated. This ensures
that RT1 and RTG remain connected and that relay K4 is de-energised.
If at any time the VMD460-NA is triggered, the connection of RT1 and RTG is terminated
and the device remains in the alarm state until it is released again by the ripple-control
receiver.
Wiring diagram legend
* Explanation: NC (in non-operating state closed)
NO (in non-operating state open)
off (switched off)
No.
Element Function
1 A1, A2
Supply voltage U
s
(see ordering details)
2 L1, L2, L3, N Power supply connection
3 K1, K2 Relay connections
4
DG1/2,
D1, D2
Contact monitoring interface switch
DG1/2: GND
D1: Feedback signal contact K1
D2: Feedback signal contact K2
(feedback signal contacts optionally NC/NO/off)*
5 RTG, RT1
RTG: GND
RT1: remote trip input (optionally NC/NO/off)*
6 A, B Service interface
7
R
on/off
Activate or deactivate the terminating resistor of the service interface (120 Ω )
8 RE Ripple-control receiver
9 K3 External relay with an NC contact and an NO contact
10 K4 External relay with two NO contacts
DG3/4, D3, D4 Not used for this standard
Use contact monitoring to ensure that there is no operation with welded
contactor contacts!
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