ABB ZX0 - Checking the Wiring

32 | Manual ZX0 HB 600 en - Revision 05
Table 2.3.5.2.2: Earthing of terminals on the voltage transformer terminal board
Windings
Terminals
Number Tap e-n winding
1 N a n
1
●
N a n da dn
1
●
N a1 a2 n
1
● ●
N a1 a2 n da dn
2 N 1a 1n 2a 2n
2
●
1a 1n 2a 2n da dn
2
●
1a1 1a2 1n 2a1 2a2 2n
Checking the wiring
Finally, check the earthing system of the voltage
transformer wiring in accordance with table
2.3.5.2.2.
When 2 windings plus a tap or 2 windings plus e-n winding, are
used, "N" is implemented by the works at the base plate of the
voltage transformer.
N
The terminal must be earthed via the earthing screw!
Earthing of the terminal in accordance with the circuit diagram!
Earthing screw fitted in accordance with the circuit diagram
and figure 2.3.5.2.3 or 2.3.5.2.4!
dn
n