Protection device for transformer
A protection device and transformer technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of vulnerable components, large no-load closing impulse current, overcurrent tripping, etc., to reduce the current impact and easy to operate , the effect of simple circuit
Active Publication Date: 2013-04-03
HISENSE HOME APPLIANCES GRP CO LTD +1
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Problems solved by technology
[0002] Generally, when the transformer is in a steady state, the iron core is saturated, and the no-load closing impulse current is very large, which can cause over-current tripping, and it is also easy to damage the components in the circuit.
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[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0013] like figure 2 As shown, the common circuit is that the transformer is directly connected to the load. like figure 1 As shown, the present invention adds a first switch circuit 2 , an absorption circuit 3 , and a second switch circuit 4 between the original transformer 1 and the load 5 . The absorbing circuit 3 is connected to the first switch circuit 2 in parallel, the output terminal of the transformer 1 is connected to the absorbing circuit in the initial state of power-on, and the absorbing circuit 3 is connected in series to the second switch circuit 4. After the completion, the output of the transformer 1 is connected to the first switch circuit 2, and the first The switch circuit 2 is connected in series to the second switch circuit 4 , and the second switch circuit 4 is connected to the load 5 .
[0014] like image 3 As s...
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The invention provides a protection device for a transformer. The protection device comprises the transformer, a first switching circuit, an absorbing circuit, a second switching circuit and a load, wherein the output of the transformer is connected to the first switching circuit, the first switching circuit is connected in series with the second switching circuit, the second switching circuit isconnected with the load, and the absorbing circuit is connected in parallel with the first switching circuit and connected in series with the second switching circuit. The first switching circuit is disconnected to electrify the isolating transformer to instantly design the absorbing circuit, so the current impact can be reduced, and the impact can be quickly attenuated; after finishing, the absorbing circuit is cut off, and the first switching circuit is switched; and meanwhile, when the load is over-voltage, the second switching circuit is disconnected to protect the transformer. The protection device has simple circuits, is easy to operate, and can protect high-value components.
Description
technical field [0001] The invention relates to the technical field of transformer circuits, in particular to a protection device for transformers. Background technique [0002] Generally, when the transformer is in a steady state, the iron core is saturated, and the no-load closing impulse current is very large, which can cause overcurrent tripping, and it is also easy to damage the components in the circuit. Contents of the invention [0003] Aiming at the shortcomings of the above-mentioned transformer in operation, the present invention provides a protection device for the transformer, which can reduce the amount of current impact and quickly attenuate the impact, which is beneficial to protect high-value components. [0004] A protection device for a transformer, comprising a transformer, a first switch circuit, an absorption circuit, a second switch circuit and a load, the output end of the transformer is connected to the first switch circuit, the first switch circui...
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IPC IPC(8): H02H7/04
Inventor 任艳芳陈坚波吕根贵
Owner HISENSE HOME APPLIANCES GRP CO LTD