53
terminal 1 close. The failure 2 trip switching output
terminal 2 is closed. Switching output terminal 3 is closed
when the reclose of the protection operates. Protection
Wing trip (second trip), switching output terminal 4 closed.
5. [Calculation model ]
(1) The current is constant: to calculate the short -
circuit voltage according the short circuit current, observe
it by the current, voltage amplitude of each states and vectors.
(2) The voltage is constant: to calculate the short - circuit current according the short
circuit voltage, observe it by the current, voltage amplitude of each states and vectors.
Coefficient of zero sequence: enter it based on protection value. KX is generally 0.67.UX be
defined 3U0 or synchronous voltage.
Some of the reclosing of the protection need
synchronous voltage that the reclosing action, the UX as
the synchronous voltage protective device. Enter the
amplitude and phase of the voltage in accordance with
the protection setting, generally 57.73V or 100V.
6. [Test result]
Automatically record the operating time of the
protective device and reclosing action time.
7. The contacts control / time control
This test uses the principle of time control, contacts priority, according to time, in the case
of the scene contacts cannot find, according to the time control to the output of each state.
Note: The fault state time should be set slightly larger than the protected action time; the
trip state time should be set slightly larger than the protection reclosing action time. The
output process of each state is as follows:
Normal state-------Fault sate---------State after trip--------State after reclose--------Wing
jump
Summary of Contents for HT-802
Page 78: ...78...
