Secondary wiring device for test of characteristics of a current transformer
A current transformer and characteristic testing technology, applied in the direction of measuring devices, measuring device casings, instruments, etc., can solve the problem of unresolved frequent wiring, and achieve the effect of simplifying the testing work, reducing the frequency of connecting and changing lines, and eliminating potential safety hazards.
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[0015] In order to realize the function of switching between the two states of "connection test" and "short circuit to ground". Double pole double throw switch for each winding, such as figure 1 Shown: The middle terminal of the switch is the "connection terminal", which is connected to the lead wires S1 and S2 of the secondary winding of the current transformer.
[0016] When the double-pole double-throw switch is placed in the "test terminal" position, the corresponding secondary winding of the transformer is connected to the tester and enters the test state of the transformer characteristic test; the "test terminal" and the measurement port of the volt-ampere characteristic tester Connection; when the DPDT switch is placed in the "short terminal" position, the connected secondary winding is short-circuited to ground. And can be grounded through the wiring device shell. In the non-test state, ensure that there is no danger of secondary open circuit of the transformer.
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