CN209374258U - Current transformer leaves unused winding short circuit energy saver - Google Patents
Current transformer leaves unused winding short circuit energy saver Download PDFInfo
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- CN209374258U CN209374258U CN201822249791.8U CN201822249791U CN209374258U CN 209374258 U CN209374258 U CN 209374258U CN 201822249791 U CN201822249791 U CN 201822249791U CN 209374258 U CN209374258 U CN 209374258U
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- current transformer
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Abstract
The utility model relates to electric-power meterings and field of measuring technique, more particularly to a kind of idle winding short circuit energy saver of current transformer, a resistance and a capacitor are concatenated in the idle winding output end of current transformer, resistance and current transformer leave unused umber of turn as proportional relation, and the idle umber of turn of the capacity and current transformer of capacitor is inverse relation.The utility model is in idle winding output end one resistance of series connection of temporary unused current transformer and a capacitor, for replacing the conducting wire of idle winding short circuit；According to different idle umber of turns, choose the capacitor of different capacity, utilize capacitive reactance characteristic of the capacitor in alternating current, realize the control to idle winding loop electric current and voltage, the high pressure that idle winding open circuit generates can be effectively reduced, it can be reduced kwh loss caused by direct short-circuit again simultaneously, it is energy saving, the measuring accuracy of mutual inductor can also be improved.
Description
Technical field
The utility model relates to electric-power meterings and field of measuring technique, and in particular to a kind of idle winding of current transformer is short
Road energy saver.
Background technique
At present in electric power metering system, commercial power mostly uses the metering method of massive quantity power supply and measurement, and existing high pressure measurement is set
Standby mainly to have current transformer, present current transformer is mostly metering, measurement and protection unitary design.In this way without single
Only measurement cabinet and protection cabinets can be saved money effectively, save space.But this also brings another problem, is exactly greatly
Measurement and protection is spare idle when more, is not connect load within a very long time.Current transformer leaves unused winding
Open circuit can generate high pressure, so do not allow to open a way, therefore need short circuit according to the winding that requires to leave unused in actual operation.?
The error of metering coil can be impacted in the case where having winding short circuit, while the coil of short circuit can also consume a part of electricity
Amount.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is that: it is short to provide a kind of idle winding of current transformer
Road energy saver can effectively reduce the high pressure that idle winding open circuit generates, while can be reduced electricity caused by direct short-circuit again
Loss, it is energy saving.
The technical scheme adopted by the utility model for solving the technical problem is:
The current transformer leaves unused winding short circuit energy saver, concatenates one in the idle winding output end of current transformer
The idle umber of turn of a resistance and a capacitor, resistance and current transformer is proportional relation, the capacity and electric current of capacitor
Mutual inductor leaves unused umber of turn as inverse relation.
The utility model is connected a resistance and a capacitor in the temporary unused current transformer winding output end that leaves unused,
For replacing the conducting wire of idle winding short circuit；According to different idle umber of turns, the capacitor of different capacity is chosen, electricity is utilized
Hold capacitive reactance characteristic in alternating current, realize the control to idle winding loop electric current and voltage, can effectively reduce it is idle around
The high pressure that group open circuit generates, while can be reduced kwh loss caused by direct short-circuit again, it is energy saving, mutual inductor can also be improved
Measuring accuracy.
Wherein, resistance selects the power-type resistance of different resistance values according to current transformer umber of turn difference of leaving unused；；With electricity
Using the power-type resistance for the 5W that resistance value is 1500 Ω, capacitor uses to be held resistance for the idle umber of turn 1000AN of current transformer
Amount is the polarity free capacitor of 0.01 μ F.The consumption power of the idle umber of turn direct short-circuit of current transformer at this time is 0.12W,
Connecing idle the consumed power of winding short circuit energy saver of current transformer is about 0.0536W；Measure simultaneously the error of grade from
0.102% be increased to 0.139% (rated current 100% when, 15VA data at full capacity).
Compared with prior art, the utility model has the following beneficial effects:
The utility model connects resistance and capacitor in the idle winding side of interim unused current transformer winding, plays short circuit
Effect, while again than direct short-circuit consumption power it is few very much.By test of many times, the idle winding concatenation electricity of current transformer
After resistance and capacitor, the voltage when voltage at both ends is than open circuit reduces by 80%；The power of consumption is idle winding direct short-circuit simultaneously
When 1/6-1/3, while the error amount for measuring coil can also deviate 0.008-0.05% to the forward.
Detailed description of the invention
Fig. 1 is 1 schematic diagram of embodiment.
Specific embodiment
The utility model embodiment is described further with reference to the accompanying drawing:
Embodiment 1:
The winding short circuit energy saver as shown in Figure 1, current transformer described in the utility model leaves unused, in current transformer
Idle winding output end concatenates a resistance and a capacitor, and resistance and current transformer leave unused umber of turn as direct ratio pass
System, the capacity and current transformer of capacitor leave unused umber of turn as inverse relation.
Resistance selects the power-type resistance of different resistance values according to current transformer umber of turn difference of leaving unused；Capacitor is according to electricity
The idle umber of turn difference of current transformer selects the polarity free capacitor of different capabilities；It is left unused umber of turn with current transformer
Power-type resistance of the resistance using the 5W that resistance value is 1500 Ω, the nonpolarity electricity that capacitor is 0.01 μ F using capacity for 1000AN
Hold.The consumption power of the idle umber of turn direct short-circuit of current transformer at this time is 0.12W, and it is short to connect the idle winding of current transformer
Energy saver consumed power in road is about 0.0536W；Measuring the error of grade simultaneously, from 0.102% to be increased to 0.139% (specified
Electric current 100% when, 15VA data at full capacity).
The utility model is connected a resistance and a capacitor in the temporary unused current transformer winding output end that leaves unused,
For replacing the conducting wire of idle winding short circuit；According to different idle umber of turns, the capacitor of different capacity is chosen, electricity is utilized
Hold capacitive reactance characteristic in alternating current, realize the control to idle winding loop electric current and voltage, can effectively reduce it is idle around
The high pressure that group open circuit generates, while can be reduced kwh loss caused by direct short-circuit again, it is energy saving, mutual inductor can also be improved
Measuring accuracy.
Claims (3)
- The winding short circuit energy saver 1. a kind of current transformer leaves unused, which is characterized in that defeated in the idle winding of current transformer Outlet concatenates a resistance and a capacitor, and resistance and the idle umber of turn of current transformer are proportional relation, capacitor Capacity and current transformer leave unused umber of turn as inverse relation.
- The winding short circuit energy saver 2. current transformer according to claim 1 leaves unused, which is characterized in that the resistance root The power-type resistance of different resistance values is selected according to current transformer umber of turn difference of leaving unused.
- The winding short circuit energy saver 3. current transformer according to claim 1 leaves unused, which is characterized in that the capacitor root According to current transformer leave unused umber of turn difference select different capabilities polarity free capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822249791.8U CN209374258U (en) | 2018-12-29 | 2018-12-29 | Current transformer leaves unused winding short circuit energy saver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822249791.8U CN209374258U (en) | 2018-12-29 | 2018-12-29 | Current transformer leaves unused winding short circuit energy saver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209374258U true CN209374258U (en) | 2019-09-10 |
Family
ID=67828150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822249791.8U Active CN209374258U (en) | 2018-12-29 | 2018-12-29 | Current transformer leaves unused winding short circuit energy saver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209374258U (en) |
-
2018
- 2018-12-29 CN CN201822249791.8U patent/CN209374258U/en active Active
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