Prophi
®
12R / 12 RS
28
Application: Coupling of two PFC-systems using 2 PF-controllers
The coupling of two compensation systems via the interface of PF-controllers Prophi12RS offers
following advantages:
- no sum current transformer and no current transformer switching required
- easy installation, real dynamic compensation of both compensation systems
Programming:
1. “Master”: Menu INTERFACE /
3 EXTERNAL INPUT:
COUPLING PAR. (systems will switching symmetrically) OR
COUPLING SER. (systems will switching one after another)
11 BAUDRATE:
free (but the same at each device)
2. Controller of 2nd system: Menu INTERFACE/
10 PROTOCOL COM1:
MODBUS RTU
11 BAUDRATE COM1:
equal to Master-controller
12 ADRESS:
1
No additional settings are required.
NOTE: In coupling mode C-TEST is inactive!
Application example:
Two separate systems operate at two transformers; a coupling via a coupling switch exists between
both systems
1) Coupling is open: Both systems work completely independent.
2) Coupling is closed: Due to controller coupling, the two PFC systems are operated in PARALLEL
(symmetrically) or in SERIES (as extension).
Undesired interactions of the compensation system are avoided during operation at a common
bus bar (oscillation).
Description:
During controller coupling each controller measures its respective current. The measuring values of
reactive power difference are transmitted via interface to the „Master“. The “Master” controls and
synchronizes the switching of both controllers. No additional installation required.
Installation:
The coupling of the 2 PF-controllers Prophi 12RS is done via interface (RJ45 plug) using a standard
LAN-cable CAT5 . The 110…230~ signal “Coupling switch closed” has to be conducted to the potential
free external input of a controller ( “Master”).
Interface
(RJ45)
ext. input (110...230V~)
LAN-cable (CAT5/CAT6)
Interface
(RJ45)
Ct1
X / 5A
Ct2
X / 5A
Transformer 1
Transformer 2
Coupler
Consumer (1)
Prophi 12RS
(Master)
Prophi 12RS
(Slave)
Consumer (2)
Capacitor system 1
Capacitor system 2
Feed 1
Feed 2
