Section 3: CONNECTION ALTERNATIVES MEASURING VOLTAGE
AND MEASURING CURRENT
According to the existing grid and the desired operating mode (CONTROL-MODE
Programming) the BR7000 has to be connected accord. one of the following alternatives.
In grids without neutral conductor the connector N from meas.voltage at the
controller has to be open.
Program the ExpertMode 1 as: 13 U-connection: -- L1 - L2 - L3
Alternative 1: measuring performed in each phase - 3 current transformers needed
Use: CONTROL-MODE: 1 - 4
BR7000
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
BR7000
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
BR7000
Reserve
PE
N
L2 (S)
L3 (T)
L1 (R)
( L1) ( N )
L1 L2 L3 N(PE)*
Supply voltage
110-230V~
Measuring voltage Um
Meas.current
L3
Meas.current
L2
Meas.current
L1
Load site
( L1) ( N )
L1 L2 L3 N(PE)*
Supply voltage
110-230V~
Measuring voltage Um
Meas.current
L3
Meas.current
L2
Meas.current
L1
L1 (R)
L2 (S)
L3 (T)
PE
N
Load site
- 6 -
( L1) ( N )
L1 L2 L3 N(PE)*
Supply voltage
110-230V~
Measuring voltage Um
Meas.current
L3
Meas.current
L2
Meas.current
L1
L1 (R)
L2 (S)
L3 (T)
PE
N
L1 L2 L3 N
P F C- system
