Single Phase Fault - ISA T1000 PLUS User Manual

DOC. MIE91093 Rev. 1.34 Page 93 of 145
"master" is because it is its auxiliary contact that starts the
test of all T1000 PLUS, including itself. In conclusion, the test
sequence will be the following:
. Select the External mode on all T1000 PLUS:
TEST CONTROL > Fault injection > External ESC
. Program the auxiliary contact closure on T1000 PLUS-1:
TEST CONTROL > Auxiliary contact (delay = 0) ESC
. Press ON+TIME on T1000 PLUS no. 2 and 3: no output is
generated; timer does not start;
. Press ON+TIME on T1000 PLUS-1: outputs are generated
and timers start on all T1000 PLUS.
. This sequence is to be followed whenever a fault is
generated.
The other selection to perform on all T1000 PLUS is the pre-
fault range and mode:
AUX VAC/VDC > Aux VAC control > Range RET
> Mode > Pre-fault +
fault > Pre-fault amplitude
> Pre-fault phase
Set the range at the value closer to VN: usually it is 62.5 V.
The pre-fault amplitude value is VN.
For single phase and three phase faults the pre-fault phase is
zero; for phase to phase faults see below.

1.12.5 Single phase fault

In single phase faults, voltage and current vectors are
modified during the test as shown in the following figure.