9.7.1.4. 3-wire 2 x VT and 3 x CT
3 wire asymmetrical (VDE) 2 x VT and 3 x CT configuration
Meter configured for 4 wire, 3 element metrology
Terminal Phase Function Terminal Phase Function
1 1 I1 - CT1 in 7 3 I3- CT3 in
2 1 U1 - VT1 in 8 3 U3 - VT2 in
3 1 I1 - CT1 out 9 3 I3 - CT3 out
4 2 I2 - CT2 in 11 Un No connection
5
U2 - VT common
6 2 I2 - CT2 out
The Un connection (terminal 11) remains unconnected. Do NOT connect it to ground.
Typical wiring illustrated below:
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