CN204886178U - LXXH series arc extinction harmonic elimination route selection and overvoltage protection - Google Patents
LXXH series arc extinction harmonic elimination route selection and overvoltage protection Download PDFInfo
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- CN204886178U CN204886178U CN201520670564.6U CN201520670564U CN204886178U CN 204886178 U CN204886178 U CN 204886178U CN 201520670564 U CN201520670564 U CN 201520670564U CN 204886178 U CN204886178 U CN 204886178U
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- 230000001012 protector Effects 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 3
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Abstract
The utility model discloses a LXXH series arc extinction harmonic elimination route selection and overvoltage protection, it includes: system busbar (G), can hold combination formula overvoltage protection (LXFB), voltage transformer (TV), high -pressure current -limiting fuses (PU), computer integrated controller (LXXH), high -pressure current -limiting fuses combination protection device (PUR), current data detection mechanism greatly. The utility model is used for 3 - -35kV isolated neutral system can be fast turns into direct metal nature ground connection with the arc light nature ground connection of trouble looks to effectively restrain arc light nature grounding surge.
Description
Technical field
The utility model relates to technical field of electricity, particularly relates to a kind of LXXH series extinguishing arc, extinguishing harmony, selecting line and overvoltage protection.
Background technology
Neutral point indirect earthing electric power system, when there is Single Phase Metal ground connection, other two phase-to-ground voltages will be elevated to fault phase 3 times i.e. line voltage, and the electric equipment in this type systematic is as insulation against ground levels such as transformer, voltage transformer, current transformer, circuit breaker, cable lines.Still can meet the requirement of bearing the effect of line voltage for a long time.But for when there is single-phase arc light ground connection in system, intermittent arc light can cause peak-peak can reach the phase voltage peak value of more than 3.5 times, certainly will cause like this cumulative bad of solid insulation damage and insulation weak link damaged.Make fault spread, cause equipment to puncture and the major accidents such as short circuit.Simultaneously due to the arc light overvoltage in line network, cause portion voltage instrument transformer saturated, resonance and overload are even burnt, serious can also cause Explosion of on Arrester, transformer damages and produces certain disaster hidden-trouble, the even more serious large resonance that can bring out supply line, causes Explosion of Transformer formula line short.Make integrated protection seriously malfunctioning, and metallic earthing should be selected within the as far as possible short time (20ms).
In view of the defect existed in above prior art, be necessary it to improve further, make it have more standby practicality, could realistic service condition.
Utility model content
For overcoming above-mentioned deficiency; the utility model object provides a kind of LXXH series extinguishing arc, extinguishing harmony, selecting line and overvoltage protection; for 3--35kV isolated neutral system, fast the arc light ground connection of fault phase can be converted into direct metal ground connection, thus effective restrain arc photosensitiveness grounding surge.
Scheme of the present utility model is as follows: a kind of LXXH series extinguishing arc, extinguishing harmony, selecting line and overvoltage protection, and it comprises:
System busbar (G) comprises live wire, zero line and ground wire;
The large Combined over-voltage protection device (LXFB) that can hold comprises multiple nonlinear resistance, describedly can hold composite type mistake greatly
One end electrical ground of voltage protection (LXFB);
Voltage transformer (TV), provides three-phase voltage (Ua, Ub, Uc), open delta voltage (Uo) and residual voltage (Un), and one end of described voltage transformer (TV) is electrically connected at high-voltage and current-limitation fuse (PU);
High-voltage and current-limitation fuse (PU), its one end be electrically connected at described large multiple nonlinear resistances that can hold Combined over-voltage protection device (LXFB);
Microcomputer general controller (LXXH) comprises voltage transformer control end, individual-phase control high pressure vacuum contactor control end, and the other end being electrically connected at described voltage transformer (TV) of described microcomputer general controller (LXXH) one end is electrical;
High-voltage and current-limitation fuse assembled protector (PUR) comprises high-pressure vacuum contactor (Ja), high-pressure vacuum contactor (Jb), high-pressure vacuum contactor (Jc), the connecting lever of one end of described high-voltage and current-limitation fuse assembled protector (PUR) is electrically connected at microcomputer general controller (LXXH), its other end be electrically connected at current data testing agency;
Current data testing agency, comprises neutral point side electric current (TA) checkout gear and single-phase active power (PA) checkout gear, the other end electrical ground of described current data testing agency.
Further, described current data testing agency comprises neutral point side electric current (TA) checkout gear and single-phase active power (PA) checkout gear.
Further, neutral point side electric current (TA) checkout gear of described current data testing agency is connected to ammeter.
The beneficial effects of the utility model: the utility model is used for 3--35kV isolated neutral system, fast the arc light ground connection of fault phase can be converted into direct metal ground connection, thus effective restrain arc photosensitiveness grounding surge.The utility model possesses after neutral by arc extinction coil grounding or resistance grounded and isolated neutral system install this device additional:
1, arc eliminator: the single phase ground fault in the omnidistance full automatic treatment power distribution network of this device.Its real-time automatic tracking, real-time monitoring system voltage and capacitance current; Automatically action is carried out fast when there is single-phase arc light ground connection, single-phase arc light ground connection is made to be able to quick elimination, when there is Single Phase Metal ground connection, this device automatically identifies and selects fault phase, and single-phase fault automatically exits after eliminating and preserves fault message in order to inquiry.
2, harmonic elimination function: this device, by special controllable silicon and reliable software algorithm, can carry out warming-up exercise to the secondary resonance of system, makes condition of resonance be destroyed, reaches harmonic elimination object, thus protect the normal operation of PT.
3, route selection function: this device can increase small current earthing wire-selecting function, this function and arc eliminator carry out locking and adopt sampling algorithm simultaneously, ensure that accuracy and the practicality of route selection.
4, over-voltage protection function: when of short duration thunder and lightning and switching overvoltage occur system, by the combination overvoltage protector restriction in device and absorption.
5, reliability: the service behaviour of this device is not subject to the impact on capacitance current and earth point in electrical network, reliable in action, and effect limits, and does not affect expansion and the change of electrical network, allows the capacitance current of 250A to continue through 2 hours.
6, practicality: this appliance arrangement is simple, and volume is little, and function is many, Installation and Debugging are convenient, are both suitable for high voltage variable distribution system, and are applicable to low-voltage distribution system again.Reliable operation, superior performance, cheap.
7, fast and safely property: response is exceedingly fast, LXXH series extinguishing arc, extinguishing harmony, selecting line and overvoltage protection (< 20ms) can be devoted oneself to work immediately after generation single phase ground fault, both safe and reliablely in turn simplify equipment.
Accompanying drawing explanation
Fig. 1 is electrical installation schematic diagram of the present utility model.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
As shown in Figure 1, a kind of LXXH series extinguishing arc, extinguishing harmony, selecting line and overvoltage protection, it comprises:
System busbar (G) comprises live wire, zero line and ground wire;
The large Combined over-voltage protection device (LXFB) that can hold comprises multiple nonlinear resistance, describedly can hold composite type mistake greatly
One end electrical ground of voltage protection (LXFB);
Voltage transformer (TV), provides three-phase voltage (Ua, Ub, Uc), open delta voltage (Uo) and residual voltage (Un), and one end of described voltage transformer (TV) is electrically connected at high-voltage and current-limitation fuse (PU);
High-voltage and current-limitation fuse (PU), its one end be electrically connected at described large multiple nonlinear resistances that can hold Combined over-voltage protection device (LXFB);
Microcomputer general controller (LXXH) comprises voltage transformer control end, individual-phase control high pressure vacuum contactor control end, and the other end being electrically connected at described voltage transformer (TV) of described microcomputer general controller (LXXH) one end is electrical;
High-voltage and current-limitation fuse assembled protector (PUR) comprises high-pressure vacuum contactor (Ja), high-pressure vacuum contactor (Jb), high-pressure vacuum contactor (Jc), the connecting lever of one end of described high-voltage and current-limitation fuse assembled protector (PUR) is electrically connected at microcomputer general controller (LXXH), its other end be electrically connected at current data testing agency;
Current data testing agency, comprises neutral point side electric current (TA) checkout gear and single-phase active power (PA) checkout gear, the other end electrical ground of described current data testing agency.
As preferred version of the present utility model, current data testing agency of the present utility model comprises neutral point side electric current (TA) checkout gear and single-phase active power (PA) checkout gear.
As preferred version of the present utility model, neutral point side electric current (TA) checkout gear of current data testing agency of the present utility model is connected to ammeter.
Although give detailed description and explanation to embodiment of the present utility model above; but what should indicate is; we can carry out various equivalence according to conception of the present utility model to above-mentioned execution mode and change and amendment; its function produced do not exceed that specification contains yet spiritual time, all should within protection range of the present utility model.
Claims (3)
1. LXXH series extinguishing arc, extinguishing harmony, selecting line and an overvoltage protection, is characterized in that: it comprises:
System busbar (G) comprises live wire, zero line and ground wire;
The large Combined over-voltage protection device (LXFB) that can hold comprises multiple nonlinear resistance, describedly can hold composite type mistake greatly
One end electrical ground of voltage protection (LXFB);
Voltage transformer (TV), provides three-phase voltage (Ua, Ub, Uc), open delta voltage (Uo) and residual voltage (Un), and one end of described voltage transformer (TV) is electrically connected at high-voltage and current-limitation fuse (PU);
High-voltage and current-limitation fuse (PU), its one end be electrically connected at described large multiple nonlinear resistances that can hold Combined over-voltage protection device (LXFB);
Microcomputer general controller (LXXH) comprises voltage transformer control end, individual-phase control high pressure vacuum contactor control end, and the other end being electrically connected at described voltage transformer (TV) of described microcomputer general controller (LXXH) one end is electrical;
High-voltage and current-limitation fuse assembled protector (PUR) comprises high-pressure vacuum contactor (Ja), high-pressure vacuum contactor (Jb), high-pressure vacuum contactor (Jc), the connecting lever of one end of described high-voltage and current-limitation fuse assembled protector (PUR) is electrically connected at microcomputer general controller (LXXH), its other end be electrically connected at current data testing agency;
Current data testing agency, comprises neutral point side electric current (TA) checkout gear and single-phase active power (PA) checkout gear, the other end electrical ground of described current data testing agency.
2. a kind of LXXH series extinguishing arc, extinguishing harmony, selecting line according to claim 1 and overvoltage protection, is characterized in that: described current data testing agency comprises neutral point side electric current (TA) checkout gear and single-phase active power (PA) checkout gear.
3. a kind of LXXH series extinguishing arc, extinguishing harmony, selecting line according to claim 1 and overvoltage protection, is characterized in that: neutral point side electric current (TA) checkout gear of described current data testing agency is connected to ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520670564.6U CN204886178U (en) | 2015-09-01 | 2015-09-01 | LXXH series arc extinction harmonic elimination route selection and overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520670564.6U CN204886178U (en) | 2015-09-01 | 2015-09-01 | LXXH series arc extinction harmonic elimination route selection and overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886178U true CN204886178U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520670564.6U Expired - Fee Related CN204886178U (en) | 2015-09-01 | 2015-09-01 | LXXH series arc extinction harmonic elimination route selection and overvoltage protection |
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| Country | Link |
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| CN (1) | CN204886178U (en) |
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2015
- 2015-09-01 CN CN201520670564.6U patent/CN204886178U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20190901 |