ISA T1000 PLUS User Manual page 35

DOC. MIE91093 Rev. 1.34 Page 35 of 145
function knob and display; the value is computed from the
nominal relay (phase – to – phase) voltage VN:
V pre-fault = VN/1.73
Standard values are: 57.8 V for VN = 100 V; 63.5 V for VN =
110 V.
After this adjustment the fault voltage is generated
prior to all tests, and is adjusted by the knob (20).
. Connect the relay current input to the two main current
output sockets (13) that correspond to the current to be
generated. For the sake of accuracy and ease of adjustment,
select the smallest range greater that the desired current.
NOTE: in case of three phase relay, connect all currents in
series.
. Select the connection socket measurement pressing the
push-button (57): the LED turns on. This enables current
output measurement. WARNING: if you do not select the
output socket, the test displays false current or voltage values.
. Select ON and check if you can easily adjust the desired
current, acting on knob (6). If the current is reached with a
rotation less than one fifth of the total, this means that the
burden is very low. In this instance, reduce the output power
with the following menu commands:
Test control > Test power > 60 VA > ESC
The 60 VA LED turns on. Select ON again, and check that the
desired current can be reached with ease of adjustment; if the
current is not reached, go back and select 300 VA.
. Connect the relay voltage input to the two auxiliary AC
voltage output sockets (62).
NOTE: in case of three phase relay, connect all voltages in
parallel.
. As this is a power relay, it is possible to check directly the P-
Q curve, selecting in Other measurements the display of P and
Q. This is performed the following way.
METERS > OTHER > INTERNAL > P-Q ESC
The display shows P and Q along with current, voltage and
angle.