DOC. MIE91093 Rev. 1.34
Page 128 of 145
3.
Wait until the green LED Locked is on (locked to
Satellite) and then press the Red button Start/Stop to
start issuing the pulses to the T1000 PLUS.
4.
Connect the SWT3 to the three phase supply
5.
Connect the power supply of the T1000 PLUS to the
SWT3 output
6.
Connect the 100 A output of the T1000 PLUS to the
HCSW by means of the short test leads
7.
Connect the output of the HCSW to the CT HV terminals
phase R.
8.
NOTE: the connection is the same for secondary relay
testing; T1000 output will be connected to the relay
input, and the current will be reduced to 5 A.
Now switch on the T1000 PLUS. After the start-up, select
relay mode from the menu.
Then follow these steps at the two ends.
Turn the Main Knob fully counter clockwise
Press the Right Arrow = ON
Turn the Main knob clockwise until the reading is about
100 A
Leave it there and check the relay readings in terms of
o
Local Current 1
o
Remote Current 1
o
Relative Angle
o
Measured differential current
In this condition, the differential current and relative angle of
current at the two ends of the line depend upon the phase that
has been selected to supply the T1000 PLUS.
Warning
The two T1000 PLUS must be supplied with the same phase,
either V
R
, or V
Y
or V
B
. Since it is almost impossible to
determine what phase is used on each terminal, the SWT3
helps switching the power supply from one phase to another to
get the correct phase reference that will provide either almost
0 A or 400 A
