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9.7.1.3. 3-wire 3 x VT and 2 x CT
3 wire asymmetrical (VDE) 3 x VT and 2 x CT configuration
Meter configured for 3 wire, 2 element metrology
Terminal Phase Function Terminal Phase Function
1 1 I1 - CT1 in 7 3 I3- CT2 in
2 1 U1 - VT1 in 8 3 U3 - VT3 in
3 1 I1 - CT1 out 9 3 I3 - CT2 out
4
No connection 11 Un No connection
(see note below)
5 2 U2 - VT2 in
6
No connection
The Un connection (terminal 11) may remain unconnected or be connected to ground.
Typical wiring illustrated below:
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