HVTest HT-802, Руководство пользователя

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In mutual standby mode, closed the standby switch will cause the carried load beyond
the allowable maximum load, so require load rejection. Generally if want to determine
whether the transformer is overload by judging the current automatically inputted exceed the
setting over-current value or not.
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The switch closing into fault line results in a very large current after automatic input, to
simulate accelerated action.
Connection mood of current is very simple, as shown in the following illustration
(2) Connection type of voltage
Connection mood of voltage is more complex, and required to access up to 8 voltages,
some voltage can be line voltage access, that can reduce the number of voltage channels of
tester. The number of voltage channel is 4-6.
Connection mood as shown in the following illustration
The output voltage of tester is set as follows: UA = 100V, 0 °; UB = 100V, 60 ° and then
UAB = 100V, -60 °. Since the output voltage UA and UB of the tester will respectively plus to
UA and UC of standby power supply automatic switch device (BZT), the voltage on standby
power supply automatic switch device side is:
UAB = 100V, 0 °
UBC =-UB = ​ ​ 100V, -120 °,
UCA =-UAB = 100V, 120 °.
Similarly, UC, UX and UN can access another group of bus voltage.
Branch 1 current input
Branch 2 current input
BZT
Tester