Voltage Transformers According To Iec - ABB TPU Series Instructions For Installation, Use And Maintenance Manual

C U R R E N T A N D VO LTA G E I N S T R U M E N T T R A N S F O R M E R S
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I N S T R U C T I O N S F O R I N S TA L L AT I O N , U S E A N D M A I N T E N A N C E

- Voltage transformers according to IEC

Variants of connections of double row terminal - One pole VT
according to IEC
1 measuring winding with no tap
1 measuring winding with 1 tap
1 measuring + residual
2 measuring winding with no tap
2 measuring winding with 1 tap
2 measuring + residual
3 measuring
2 measuring with tap + residual
with 1 tap
1 measuring with tap + residual
with 1 tap
1 measuring with tap + residual
Variants of connections of double row terminal - Double pole VT
according to IEC
1 measuring
1 measuring winding with 1 tap
2 measuring
1 measuring + residual
2 measuring winding with tap
Residual voltage windings connected to open delta must have dn terminal earthed
only on one of three transformers (earthing screws at dn terminals of others two
transformers have to be removed).
a n N PE
a1 a2 n N PE
a n da dn N PE
1a 1n 2a 2n N PE
1a1 1a2 2a1 2a2
1n 2n N PE
1a 2a da
1n 2n dn N PE
1a 2a 3a
1n 2n 3n N PE
1a1 1a2 2a2 da1 da2
1n 2a1 2n dn N PE
a1 a2 da1 da2
n dn N PE
a1 a2 da
n dn N PE
a b PE
a1 a2 b PE
1a 1b 2a 2b PE
a b da dn PE
1a1 1a2 2a1 2a2
1b 2b PE