ISA T1000 PLUS - Use of SWT3

DOC. MIE91093 Rev. 1.34 Page 129 of 145
1.16.2 Use of SWT3
The transformer for the auxiliary circuits is usually a Dy1 or
Dy11 transformer. Based on this, we have some cases:
Both transformers at the two ends are Dy1
In this case, supposing you have connected the T1000 PLUS to
phase R in the remote end, you have three possibilities on the
local end:
If you measure something like 200 or 346 A, it means the two
T1000 PLUS are connected to a different phase reference.
Switch SWT3 to the next position until you get the proper
values.
T1000 PLUS is
connected to
You may measure
approximately
1
phase R
0 or 400 A
2
phase Y
200 or 346 A (200 x 1.732)
3
phase B
200 or 346 A (200 x 1.732)
I
R
I
Y
I
B