ISA T1000 PLUS User Manual page 77

DOC. MIE91093 Rev. 1.34 Page 77 of 145
. Current and voltage outputs of T1000 PLUS will be connected
to the relay, according to the type of relay. The instructions for
the connection are given in the paragraph related to the relay.
. The relay trip command shall be connected to the STOP input
of T1000 PLUS.
. The Close command shall be connected to the START input
of T1000 PLUS.
. If necessary, connect the auxiliary relay output A1 to the CB
position Recloser inputs. The test starts with a Closed CB; at
the end of all tests, the test set comes back to the same
Closed position, to be ready for another test.
Connect the black socket of A1 to the polarizing voltage.
Before connecting the NO or NC contact of A1, verify the signal
logic: if Closed is No voltage, then connect to the NO socket;
else, connect to the NC socket.
. If you wish to use the DC voltage output to supply the relay
under test, press the button (69), then use knob (20) to
adjust the voltage value, that is displayed on the LCD display
(23). Connect the DC supply input of the relay and Recloser to
sockets (63).
The test set measures:
. All trip delays D1, D2... of the sequence;
. All reclose delays R1, R2... of the sequence: they are
measured from the trip command leading or falling edge,
according to the selection;
. We don't know the nominal close delays R1, R2,..: they can
be different during the test (for instance: fast reclose, slow
reclose, neutralization). In order to avoid stopping the test
before its completion, the logic is the following one:
.. If N > 1, after the first Close delay, the test set waits 99999
s for the next close command;
.. If N > 2, after the second Close delay, the test set waits for
a time equal to the former close delay, multiplied by 10.
. After a Close command, the test set generates a new fault
after a delay equal to TD, until N+1 tests are performed;
. After the last fault, the test set waits until it is sure that no
reclose command arrives.
. The test ends after N+1 faults have been generated.
However, the fact that actually the recloser will operate N+1