CN209878853U - Three-phase five-wire system rural area electricity larceny prevention device - Google Patents
Three-phase five-wire system rural area electricity larceny prevention device Download PDFInfo
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- CN209878853U CN209878853U CN201920616319.5U CN201920616319U CN209878853U CN 209878853 U CN209878853 U CN 209878853U CN 201920616319 U CN201920616319 U CN 201920616319U CN 209878853 U CN209878853 U CN 209878853U
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Abstract
The utility model relates to a three-phase five-wire system rural area electricity stealing prevention device belongs to rural area electricity stealing prevention technical field. The technical scheme is as follows: the method comprises the following steps that a Z-type intelligent switch (4) is installed in a power distribution transformer JP cabinet (1), an E-type intelligent switch (5) is installed in an electric meter box, a zero line of a 0.4kV low-voltage overhead insulated wire of a three-phase five-wire system adopts a single-core armored insulated wire, an armor layer is made of nonmagnetic metal materials and is grounded, and other wires adopt common insulated wires; the Z-type intelligent switch is directly connected to a three-phase five-wire system 0.4kV low-voltage overhead insulated conductor; the E-type intelligent switch in the electric meter box is connected with a three-phase five-wire system 0.4kV low-voltage overhead insulated conductor. The utility model has the advantages that: the phenomenon of illegal user private connection is restrained, a safe power utilization environment is provided, the power stealing risk in rural areas is obviously reduced, and the line loss rate of the transformer area is effectively reduced.
Description
Technical Field
The utility model relates to a three-phase five-wire system rural area electricity stealing prevention device belongs to rural area electricity stealing prevention technical field.
Background
At present, urban residents mostly adopt a three-phase five-wire system (TN-S system), wherein the three-phase five-wire system is characterized in that: and 3 phase lines are added with a ground wire and a zero line. The low-voltage power transmission mode which is most widely applied in the general rural low-voltage power supply is a three-phase four-wire system, three phase wires and a zero wire are adopted for supplying power, the zero wire is led out from a neutral point of a transformer and is grounded, the voltage is 380/220V, any phase wire and the zero wire are taken to form a 220V power supply line for general families, the voltage between the three phase wires is 380V, and a general power supply machine is used. The three-phase five-wire system has one more ground wire than the three-phase four-wire system, and is used for places with higher safety requirements and equipment requirements for unified grounding. China stipulates that the voltage between phase lines (namely line voltage) of a civil power supply line is 380V, and the voltage between the phase lines and the ground line or the neutral line (namely phase voltage) is 220V. The service wire is generally of a single-phase two-wire system, i.e. any one of three phase wires and a neutral wire (serving as a zero wire). If a high-power electrical appliance is used, a grounding wire is required to be arranged. The color of the three-phase five-wire standard wire is as follows: yellow line A, green line B, red line C, light blue line N and yellow green line PE. The difference of the power supply and the power sale is large, the line loss is too high, the power supply and the power utilization are disordered, and the electricity stealing phenomenon is serious in partial rural areas. The main performance is as follows: firstly, a zero line and a live line are taken from a low-voltage overhead conductor by hanging a metal hook or only a live line is taken from the low-voltage overhead conductor and introduced into a residential house, and a home zero line is adopted for electricity stealing; secondly, the inside of the meter is damaged, short-circuited and changed, so that the meter cannot be normally measured or cannot be accurately measured; thirdly, wires are connected to the distribution area privately to steal electricity. The electricity stealing of the damage metering device can be realized by checking and managing users on site, but the work effect of electricity utilization checking personnel is very little when the users face a huge user group. Meanwhile, private connection electricity stealing has the characteristics of untimely and unfixed private connection place, so that great difficulty is brought to the work of striking electricity stealing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rural area anti-electricity-theft device of three-phase five-wire system suppresses illegal user and connects the phenomenon privately, provides safe power consumption environment, obviously reduces rural area and steals electric risk, effectively reduces platform district line loss rate, has above-mentioned problem among the solution background art.
The technical scheme of the utility model is that: the utility model provides a rural area anti-electricity-theft device of three-phase five-wire system, contain distribution transformer JP cabinet, the ammeter case, Z type intelligence switch and E type intelligence switch, install Z type intelligence switch in distribution transformer JP cabinet, install E type intelligence switch in the ammeter case, 0.4kV low pressure overhead insulated wire zero line of three-phase five-wire system adopts single core armor insulated wire, this wire is by the oversheath, the armor, main insulation layer and sinle silk four bibliographic categories divide and constitute, the oversheath, the armor, main insulation layer and sinle silk outside-in set up, wherein the armor is for no magnetism metal material, the armor ground connection, other wires adopt ordinary insulated wire.
The utility model relates to a distribution transformer station JP cabinet, Z type intelligence switch and E type intelligence switch are the public equipment of publicly known in the art, all have the sale on the market.
Distribution transformer synthesizes switch board and is called JP cabinet for short, along with constantly deepening of rural electric wire netting transformation, a large amount of JP cabinets are applied to in rural electric power circuit and each distribution station district. Z-type smart switches and E-type smart switches are also common switching devices in the art.
The connecting wire of the Z-type intelligent switch in the power distribution transformer JP cabinet is directly connected to a three-phase five-wire system 0.4kV low-voltage overhead insulated wire and is connected according to the wiring requirement specified by the Z-type intelligent switch.
The E-type intelligent switch in the electric meter box has an electric leakage protection function, and is connected with a 0.4kV low-voltage overhead insulated wire of a three-phase five-wire system according to the wiring requirement specified by the E-type intelligent switch.
In the operation process, if a situation that a first electricity stealing user directly hangs and takes two-phase electricity on a low-voltage line through a metal hook exists, an armored zero line outer sheath is damaged, an armored layer is hung, a grounding loop is formed through the armored layer, a Z-type intelligent switch detects that grounding current occurs in the low-voltage power grid, and automatic switching-off operation is carried out; if electricity-stealing user two takes the live wire to introduce the private residence through the metal couple to hang on low pressure air wire, when adopting the zero line of oneself to steal electricity, form and use the electric circuit to detour E type intelligence switch, can lead to the E type intelligence switch separating brake operation that possesses earth leakage protection function to effectively restrain illegal user and connect the phenomenon privately.
The electric meter box main body and the control part of the three-phase five-wire rural area are separated to respectively form a meter box main body and a meter box control box, the E-type intelligent switch and various electric meters are arranged in the meter box main body, and the household control switch is arranged in the meter box control box; install table case main part higher position on the pole, install the lower position on the pole with table case control box.
A four-core armored cable is led out from the three-phase five-wire system, and is led into the meter box main body after a protective sleeve is penetrated; a connecting wire (two-phase zero line and live wire of each household) between the meter box main body and the meter box control box penetrates through a protective sleeve to carry out protection; the casing of table case main part and table case control box is connected through the casing earth connection to be connected with the earthing pole.
The utility model has the advantages that: the phenomenon of illegal user private connection is restrained, a safe power utilization environment is provided, the power stealing risk in rural areas is obviously reduced, and the line loss rate of the transformer area is effectively reduced.
Drawings
Fig. 1 is a schematic diagram of the wiring structure of the present invention;
FIG. 2 is a schematic view of the installation of the electric meter box of the present invention;
FIG. 3 is a schematic view of the installation of the JP cabinet of the power distribution transformer station of the embodiment of the present invention;
in the figure: distribution transformer station JP cabinet 1, table case main part 2, table case control box 3, Z type intelligence switch 4, E type intelligence switch 5, pole 6, four-core armoured cable 7, connecting wire 8 between table case main part and the table case control box, casing earth 9, earthing pole 10, distribution transformer 11, steal electric user 12, steal electric user two 13, A phase line L1, B phase line L2, C phase line L3, zero line N, ground wire PE, live wire L.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
The utility model provides a rural area anti-electricity-theft device of three-phase five-wire system, contain distribution transformer JP cabinet 1, the ammeter case, Z type intelligence switch 4 and E type intelligence switch 5, install Z type intelligence switch in distribution transformer JP cabinet, install E type intelligence switch in the ammeter case, 0.4kV low pressure overhead insulated wire zero sequence line of three-phase five-wire system adopts single core armoured insulated wire, this wire is by the oversheath, the armor, main insulation layer and sinle silk four bibliographic categories divide and constitute, the oversheath, the armor, main insulation layer and sinle silk outside-in set up, the armor is nonmagnetic metal material, the armor ground connection, other wires adopt ordinary insulated wire.
The utility model relates to a distribution transformer station JP cabinet, Z type intelligence switch and E type intelligence switch are the public equipment of publicly known in the art, all have the sale on the market.
Distribution transformer synthesizes switch board and is called JP cabinet for short, along with constantly deepening of rural electric wire netting transformation, a large amount of JP cabinets are applied to in rural electric power circuit and each distribution station district. Z-type smart switches and E-type smart switches are also common switching devices in the art.
The connecting wire of the Z-type intelligent switch in the power distribution transformer JP cabinet is directly connected to a three-phase five-wire system 0.4kV low-voltage overhead insulated wire and is connected according to the wiring requirement specified by the Z-type intelligent switch.
The E-type intelligent switch in the electric meter box has an electric leakage protection function, and is connected with a 0.4kV low-voltage overhead insulated wire of a three-phase five-wire system according to the wiring requirement specified by the E-type intelligent switch.
In the operation process, if a situation that an electricity stealing user I12 directly hangs and takes two-phase electricity on a low-voltage wire through a metal hook exists, the sheathed zero line is damaged, the ground wire and the zero line are connected, and the Z-type intelligent switch senses that a ground fault occurs in a low-voltage power grid, so that the switching-off operation is automatically carried out; if electricity stealing user two 12 hangs the live wire of getting on low pressure air wire through the metal couple and introduces the private residence, when adopting the home zero line to steal electricity, can lead to the E type intelligence switch separating brake operation that possesses earth leakage protection function to effectively restrain illegal user and connect the phenomenon privately.
The electric meter box main body and the control part in the three-phase five-wire rural area are separated to respectively form a meter box main body 2 and a meter box control box 3, the E-type intelligent switch 5 and various electric meters are arranged in the meter box main body, and the household control switch is arranged in the meter box control box; install the table case main part higher position on the pole, install the lower position on pole 6 with table case control box.
A four-core armored cable 7 is led out from the three-phase five-wire system, and is led into the meter box main body after a protective sleeve is penetrated; a connecting wire 8 (two-phase zero line and live line of each household) between the meter box main body and the meter box control box penetrates through a protective sleeve to carry out protection; the casing of table case main part and table case control box is connected through casing earth connection 9 to be connected with earthing pole 10.
In the embodiment, a zero line of a three-phase five-wire 0.4kV low-voltage overhead insulated wire adopts a single-core armored insulated wire, the wire consists of an outer sheath, an armor layer, a main insulating layer and a wire core, the outer sheath, the armor layer, the main insulating layer and the wire core are arranged from outside to inside, the armor layer is made of nonmagnetic metal materials and is grounded, and other wires adopt common insulated wires. The PE wire in the attached figure 1 is a metal armor layer outside the zero line.
Z type intelligence switch:
the manufacturer: yian Zhejiang Power electronics technology Co Ltd
The equipment model is as follows: EA3-6/630
The main functions are as follows:
1. the Z-type intelligent switch adopts a base machine core of a high-breaking type plastic shell circuit breaker and has the characteristics of compact structure and high breaking capacity;
2. the protection functions of overload, short circuit, phase loss, overvoltage, undervoltage, residual current, specific electric shock and the like are integrated with automatic reclosing;
3. the load current, the voltage, the residual current and the phase of each phase can be displayed;
4. the electric shock protection function is not affected by the magnitude of line leakage current. Under most conditions, the trip protection can be carried out below 50mA according with a specific shock waveform;
5. the working load current can be adjusted and set according to the transformer capacity of the transformer area, the transformer cannot be burnt due to overload of the load, and the transformer can also be used as a load control switch;
6. the residual current action value is adjustable in multiple gears;
7. the anti-interference capability is strong, a multistage lightning protection circuit is adopted, surge voltage can be effectively inhibited, lightning can be induced, various tip interference is eliminated, and the operation is stable and reliable;
8. the breaking time is adjustable. The total protection of the transformer area can be set at 0.3s, the secondary protection can be set at 0.2s, and the phenomena of override trip and simultaneous trip can not occur;
9. the leakage alarm function is used for line leakage fault detection or places where power failure is not allowed;
10. the phase, the value and the tripping reason can be displayed every fault tripping, and the latest 64 fault opening records are automatically memorized.
The Z-type intelligent switch is installed in a power distribution transformer JP cabinet and is used as first-level leakage protection of a transformer area, namely when the loop incoming and outgoing currents are unbalanced, the Z-type intelligent switch trips.
The zero sequence wire of the low-voltage overhead insulated wire adopts a single-core armored insulated wire, the armor layer is made of nonmagnetic metal, and the armor layer is grounded; other wires are common insulated wires. When an electricity stealing user directly hangs and takes two-phase electricity on a low-voltage wire through a metal hook in the operation process, the sheathed zero wire is damaged, the ground wire and the zero wire are connected, the Z-shaped intelligent switch senses that the low-voltage power grid has a ground fault, and the opening operation is automatically carried out.
E type intelligent switch:
the manufacturer: yian Zhejiang Power electronics technology Co Ltd
The equipment model is as follows: EA3-6F
The main functions are as follows:
1. the integrated protection functions of overload, short circuit, electric leakage, overvoltage, undervoltage, power failure and the like and manual and automatic reclosing are integrated into a whole;
2. the working load current can be set according to the capacity of the transformer in the transformer area, the transformer cannot be burnt due to overload, and the working load current can also be used as a load control switch;
3. the liquid crystal screen is adopted, so that the current voltage, current, real-time residual current and other parameter information can be displayed;
4. the residual current action value is adjustable in multiple gears, and the residual current action gear value can be reasonably selected according to the leakage current of the installation line;
5. the anti-interference capability is strong, a multistage lightning protection circuit is adopted, surge voltage can be effectively inhibited, lightning can be induced, various tip interference is eliminated, and the operation is stable and reliable;
6. the breaking time is adjustable. The device can form action time level difference with the upper and lower-level protectors to realize graded protection, and the phenomena of override trip and simultaneous trip cannot occur;
7. the protector is used for switching-off protection of voltage faults (undervoltage, overvoltage and power failure) on the power supply side, and the protector automatically switches on when the incoming call or the voltage returns to normal;
8. and the electric leakage alarm function is used for line electric leakage fault maintenance or places where power failure is not allowed. A voice module is arranged, and when the power leakage is locked, a voice prompt is sent out;
9. each fault trip can display the value, the trip reason and the occurrence time, the latest fault opening record (19 times at most) is automatically memorized, and the latest fault opening record can be consulted by pressing a key;
10. the remote switch is provided with an external control interface and can be switched on and off remotely;
11. automatically counting the commissioning time of the protector;
12. RS-485 communication ports are arranged in products, LORA wireless communication modules (matching) are arranged in the products, and the intelligent digital control technology is adopted, so that networked management and remote monitoring can be realized.
Claims (3)
1. A three-phase five-wire system anti-electricity-theft device in rural areas is characterized in that: contain distribution transformer JP cabinet (1), the ammeter case, Z type intelligence switch (4) and E type intelligence switch (5), install Z type intelligence switch in distribution transformer JP cabinet, install E type intelligence switch in the ammeter case, 0.4kV low pressure overhead insulated wire zero line of three-phase five-wire system adopts single core armor insulated wire, this wire is by the oversheath, the armor, main insulation layer and sinle silk four bibliographic categories divide to constitute, the oversheath, the armor, main insulation layer and sinle silk outside-in set up, the armor is for no magnetism metal material, the armor ground connection, other wires adopt ordinary insulated wire.
2. The device according to claim 1, wherein the device is characterized in that: the connecting wire of the Z-type intelligent switch in the distribution transformer JP cabinet is directly connected to a three-phase five-wire system 0.4kV low-voltage overhead insulated wire.
3. The device according to claim 1, wherein the device is characterized in that: and the E-type intelligent switch in the electric meter box is connected with a three-phase five-wire system 0.4kV low-voltage overhead insulated conductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920616319.5U CN209878853U (en) | 2019-04-30 | 2019-04-30 | Three-phase five-wire system rural area electricity larceny prevention device |
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| CN201920616319.5U CN209878853U (en) | 2019-04-30 | 2019-04-30 | Three-phase five-wire system rural area electricity larceny prevention device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975588A (en) * | 2019-04-30 | 2019-07-05 | 国网冀北电力有限公司唐山供电公司 | A kind of three-phase five-wire mode rural area anti-electricity-theft device and method |
| CN111257607A (en) * | 2020-03-05 | 2020-06-09 | 国网冀北电力有限公司唐山供电公司 | Method for checking parallel resistance electricity stealing of single-phase electric energy meter |
-
2019
- 2019-04-30 CN CN201920616319.5U patent/CN209878853U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975588A (en) * | 2019-04-30 | 2019-07-05 | 国网冀北电力有限公司唐山供电公司 | A kind of three-phase five-wire mode rural area anti-electricity-theft device and method |
| CN109975588B (en) * | 2019-04-30 | 2023-12-05 | 国网冀北电力有限公司唐山供电公司 | Three-phase five-wire system rural area electricity larceny prevention device and method |
| CN111257607A (en) * | 2020-03-05 | 2020-06-09 | 国网冀北电力有限公司唐山供电公司 | Method for checking parallel resistance electricity stealing of single-phase electric energy meter |
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