Connection Alternatives Measuring Voltage; And Measuring Current - janitza Prophi 15T-III Manual

Section 3: CONNECTION ALTERNATIVES MEASURING VOLTAGE

AND MEASURING CURRENT

According to the existing grid and the desired operating mode (CONTROL-MODE
Programming) the controller has to be connected accord. one of the following
alternatives. The separate auxiliary voltage (24 V DC) that is needed for the thyristor
switches has to be conducted to P1...P3 and to the connection "control 24V". The
connection of PE is mandatory!
Alternative 1: measuring performed in each phase - 3 current transformers needed
Use: CONTROL-MODE: 1 - 4; 7-12; 15 (control modes see page 11)
L1 (R)
L2 (S)
L3 (T)
N
PE
Alternative 2: single-phase measuring via current transformer in L1 Values extrapolated (balance assumed).
Measuring complies with conventional measuring for switching of three-phase capacitors.
Use: CONTROL-MODE 5; 13; 14; 16
L1 (R)
L2 (S)
L3 (T)
N
PE
Alternative 3: single-phase measuring as alternative 2 , but with capacitor current measuring in the compensation
system for collection of real capacitor currents.
Use: CONTROL-MODE 6
L1 (R)
L2 (S)
L3 (T)
N
PE
to P1...P3
Measuring voltage
Supply voltage
110-230V~
( L1) ( N ) L1 L2 L3 monitoring
24VDC
aux. voltage
24VDC
to P1...P3
Measuring voltage
Supply voltage
110-230V~
( L1) ( N ) L1 L2 L3 monitoring
24VDC
aux. voltage
24VDC
to P1...P3
Supply voltage Measuring voltage
110-230V~
( L1) ( N ) L1 L2 L3 monitoring
24VDC
aux. voltage
24VDC
- 6 -
Measuring current
L1 L2 L3
Measuring current
L1 L2 L3
PFC-system
Measuring current
L1 L2 L3
Reserve
Prophi 15T-III
®
Load-
site
Load-
site
L1 L2 L3 N
7