CN211046116U - Intelligent second grade block terminal is used to job site - Google Patents
Intelligent second grade block terminal is used to job site Download PDFInfo
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- CN211046116U CN211046116U CN201922183580.3U CN201922183580U CN211046116U CN 211046116 U CN211046116 U CN 211046116U CN 201922183580 U CN201922183580 U CN 201922183580U CN 211046116 U CN211046116 U CN 211046116U
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Abstract
The utility model relates to an intelligent second-stage distribution box for construction site, wherein, a three-phase line and a zero line are connected to an automatic reclosing switch, and a current transformer is respectively arranged on the three-phase line; the three current transformers are respectively provided with a signal wire connected with the intelligent ammeter; the intelligent electric meter is electrically connected to the automatic reclosing switch through a three-phase line and a zero line; the automatic reclosing switch is electrically connected with the three-phase intelligent electricity monitoring device through a zero line and a three-phase line, and a communication line is arranged on the automatic reclosing switch and connected with the three-phase intelligent electricity monitoring device; the automatic reclosing switch and the leakage circuit breaker are electrically connected with each other through a three-phase line and a zero line. Has the advantages that: a field manager can obtain fault alarm information at the first time, so that time is saved for timely processing the potential safety hazard of the line; secondly, when a certain branch fails, the fault can be directly reflected in the secondary box, and the efficiency of the circuit troubleshooting of the professional electrician can be improved; thirdly, the linkage of the third-stage distribution box and the second-stage distribution box is realized; fourthly, the intelligent electric meter installed in the box body can monitor the energy consumption of the project electricity utilization data, and accurate electricity utilization data reference is provided for fine management of enterprises.
Description
Technical Field
The utility model belongs to the technical field of the block terminal, especially, relate to an intelligent second grade block terminal is used to job site.
Background
In recent years, temporary electricity utilization safety accidents happen on construction sites, and the temporary electricity utilization safety hazards are very easy to cause accidents of personal electric shock casualties, electrical fires, equipment damage and the like on the construction sites, so that the temporary electricity utilization safety hazards are one of major hazard sources with more potential risks. The traditional construction site has the characteristics of strong temporary electricity utilization, various types of electric equipment, unfixed electricity utilization position, operation in the open air environment, light and thin safety electricity utilization consciousness of workers and the like, and particularly has the more prominent problem of temporary electricity utilization in the construction site along with the increase of the quantity of tasks carried by construction enterprises. After the temporary electricity utilization of a construction site adopts 'three-level power distribution secondary protection' and 'TN-S zero connection protection system' according to the current specification, the probability of electric shock accidents occurring on the site is obviously improved, but because the construction site has multiple and wide electricity utilization points, complex and variable environment and strong temporary performance, partial electric equipment facilities are frequently shifted due to construction requirements, related cable lines need to be pulled again, electric equipment cables are wound in a cross mode, and phenomena such as override tripping and leakage protection failure of an electric leakage breaker and the like which do not meet the specification requirements generally exist, and the temporary electricity utilization system mainly shows the following aspects:
1. for large-volume and single-body engineering projects, the temporary circuit fails, the hidden trouble troubleshooting work efficiency is not high
For group projects with large quantity and multiple monomers, according to the standard requirements of one machine, one brake, one leakage and one box, a large number of secondary and tertiary distribution boxes and various electric equipment are necessarily configured on site, so that when a certain electric equipment generates electric leakage, short circuit or cable breakage and electric leakage, under the condition that secondary boxes are relatively dispersed, a field professional electrician cannot easily find out a fault line or fault equipment according to a traditional method, and the efficiency is lower.
2. No leakage circuit breaker is arranged in the second-stage distribution box, and electric shock accidents are easily caused when electric leakage occurs on the line between the second-stage distribution box and the third-stage distribution box
According to the regulations of 'temporary electricity utilization safety technical Specifications in construction sites' (JGJ 46-2005), an electric leakage breaker can not be arranged in a distribution box, so in consideration of cost, a plurality of projects do not arrange the electric leakage breaker in a secondary distribution box, so that an electric shock safety accident is likely to be caused if an electric leakage occurs to a line between the secondary distribution box and a tertiary distribution box, the electric leakage breaker of a main distribution box is difficult to effectively protect, a main circuit or shunt electric leakage breaker arranged in the main distribution box is often configured with a non-high-sensitivity electric leakage breaker according to the requirement of graded segmented protection, the rated electric leakage action current of the electric leakage breaker is often greater than 100mA, and the electric shock accident is likely to occur when the electric leakage breaker of the main distribution box does not act yet.
3. The phenomenon that a three-level distribution box and a one-level distribution box trip simultaneously or override frequently occurs on the construction site
There are four main reasons for override trip: first, the leakage selection of the first and third stages is not reasonable. The minimum leakage action current and the maximum leakage breaking time are unreasonably selected, and if the leakage parameter of the three-stage box is not less than that of the total distribution box, the phenomenon of skip-step tripping occurs, namely three-stage and one-stage tripping simultaneously or three-stage not-tripping but one-stage tripping; secondly, eliminating the type selection reason, and if the one-time leakage current is too large and exceeds the parameter range of the leakage circuit breaker of the first-stage distribution box, the three-stage distribution box and the first-stage distribution box trip simultaneously; thirdly, override tripping can also be caused if the residual current circuit breaker in the tertiary tank fails; fourthly, although the parameter selection of the leakage circuit breaker of the first-level box is larger, the first-level box carries more equipment, and the parameter selection of the leakage circuit breaker of the third-level box is smaller, but only one equipment is carried. When the leakage of a single device is 20mA, the three-stage box leakage circuit breaker of the device is not operated, but the leakage of the one-stage box with a plurality of devices can be in critical tripping margin, that is, when more than one device has leakage problems at the same time, the condition that the three-stage distribution box and the one-stage distribution box trip simultaneously or override tripping is caused by considering the condition of accumulation of leakage current occurs.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's is not enough, provides an intelligent second grade block terminal is used to job site, and the application of this block terminal has effectively solved each item problem that prior art exists, and block terminal simple structure, and construction convenience reaches effectively provides work efficiency, has reduced the supervision cost.
The utility model discloses an intelligent second grade block terminal for job site include three current transformer, smart electric meter, automatic reclosing switch, three-phase wisdom power consumption monitoring device, residual current circuit breaker, voltage open-phase protection device, current transformer TA, temperature sensor T, residual current transformer;
the automatic reclosing switch is connected with an L1 phase line, a L2 phase line, a L3 phase line and a zero line, and the connected L1 phase line, L2 phase line and L3 phase line are respectively provided with a current transformer;
the three current transformers are respectively provided with a signal wire connected with the intelligent ammeter; the intelligent electric meter is electrically connected to the automatic reclosing switch through a three-phase line and a zero line; the automatic reclosing switch is electrically connected with the three-phase intelligent electricity utilization monitoring device through a zero line and a three-phase line, and a communication line is arranged on the automatic reclosing switch and connected with the three-phase intelligent electricity utilization monitoring device;
the automatic reclosing switch and the leakage circuit breaker are electrically connected with each other through a three-phase line and a zero line; a voltage open-phase protection device is respectively arranged on a three-phase line and a zero line between the automatic reclosing switch and the leakage circuit breaker, and the four voltage open-phase protection devices are connected in series and then are connected to the three-phase intelligent electricity consumption monitoring device through signal lines; the three-phase line and the zero line between the automatic reclosing switch and the leakage circuit breaker are respectively provided with a temperature sensor T, and the four temperature sensors T are connected in series and then are connected to the three-phase intelligent electricity utilization monitoring device through signal lines; a current transformer TA is arranged on each three-phase line between the automatic reclosing switch and the residual current circuit breaker, and the three current transformers TA are connected in series and then are connected to the three-phase intelligent electricity utilization monitoring device through signal lines; and a residual current transformer is arranged on a three-phase line and a zero line between the automatic reclosing switch and the residual current circuit breaker, and the residual current transformer is connected with the three-phase intelligent electricity utilization monitoring device through a signal line.
Furthermore, the plurality of residual current circuit breakers are electrically connected with the automatic reclosing switch after being connected in parallel.
Further, the leakage parameter of the automatic reclosing switch is 40mA and 0.1 s.
Furthermore, the leakage circuit breaker in the secondary distribution box and the leakage circuit breaker in the tertiary distribution box have the same leakage parameters.
Further, the leakage parameter of the leakage breaker is 160A, 30mA, 0.1s or 100A, 30mA, 0.1 s.
Technical scheme's beneficial effect lies in: a field manager can obtain fault alarm information at the first time, so that time is saved for timely processing the potential safety hazard of the line; secondly, a shunt residual current circuit breaker is arranged in the on-site secondary distribution box, and the front end of the shunt residual current circuit breaker is controlled by an automatic reclosing switch, so that when a certain shunt fails, the shunt residual current circuit breaker can be directly reflected in the secondary box, and the efficiency of troubleshooting of a professional electrician circuit is improved; thirdly, when any one or more than one loop in the secondary box has faults of leakage, phase loss, leakage protection failure and the like through the determined relevant parameter values of the automatic reclosing switch, the leakage protection of the tertiary box, the shunt leakage protection corresponding to the secondary box and the reclosing switch are linked, so that the intelligent safety electric device is triggered to alarm; fourthly, the intelligent electric meter installed in the box body can monitor the energy consumption of the project electricity utilization data, and accurate electricity utilization data reference is provided for fine management of enterprises.
Drawings
FIG. 1 the utility model relates to a job site arranges schematic diagram with intelligent second grade block terminal.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples.
As shown in fig. 1, the intelligent second-stage distribution box for construction site of the present invention comprises three current transformers, an intelligent electric meter, an automatic reclosing switch, a three-phase intelligent electric monitoring device, a residual current circuit breaker, a voltage open-phase protection device, a current transformer TA, a temperature sensor T, and a residual current transformer;
the automatic reclosing switch is connected with an L1 phase line, a L2 phase line, a L3 phase line and a zero line, and the connected L1 phase line, L2 phase line and L3 phase line are respectively provided with a current transformer;
the three current transformers are respectively provided with a signal wire connected with the intelligent ammeter; the intelligent electric meter is electrically connected to the automatic reclosing switch through a three-phase line and a zero line; the automatic reclosing switch is electrically connected with the three-phase intelligent electricity utilization monitoring device through a zero line and a three-phase line, and a communication line is arranged on the automatic reclosing switch and connected with the three-phase intelligent electricity utilization monitoring device;
the automatic reclosing switch and the leakage circuit breaker are electrically connected with each other through a three-phase line and a zero line; a voltage open-phase protection device is respectively arranged on a three-phase line and a zero line between the automatic reclosing switch and the leakage circuit breaker, and the four voltage open-phase protection devices are connected in series and then are connected to the three-phase intelligent electricity consumption monitoring device through signal lines; the three-phase line and the zero line between the automatic reclosing switch and the leakage circuit breaker are respectively provided with a temperature sensor T, and the four temperature sensors T are connected in series and then are connected to the three-phase intelligent electricity utilization monitoring device through signal lines; a current transformer TA is arranged on each three-phase line between the automatic reclosing switch and the residual current circuit breaker, and the three current transformers TA are connected in series and then are connected to the three-phase intelligent electricity utilization monitoring device through signal lines; and a residual current transformer is arranged on a three-phase line and a zero line between the automatic reclosing switch and the residual current circuit breaker, and the residual current transformer is connected with the three-phase intelligent electricity utilization monitoring device through a signal line.
And the plurality of residual current circuit breakers are electrically connected with the automatic reclosing switch after being connected in parallel.
In order to ensure the linkage of the second-stage distribution box and the third-stage distribution box, the leakage parameter of the automatic reclosing switch is 40mA for 0.1 s; the leakage parameters of the leakage circuit breaker in the secondary distribution box are the same as those of the leakage circuit breaker in the tertiary distribution box; the leakage parameters of the leakage circuit breaker are 160A, 30mA, 0.1s or 100A, 30mA, 0.1 s.
Wisdom safety power consumption monitoring device is a novel online electric safety protection device, and mainly used control is protected multinomial power consumption data such as electric leakage, circuit temperature, electric current, voltage, three-phase equilibrium degree, phase angle of distribution circuit, fields such as mainly used electric power monitoring, fire alarm.
The automatic reclosing switch (also called residual action current breaker) is mainly suitable for the industrial fields of power supply, communication, traffic monitoring and the like, has the functions of fault protection, identification and detection of electric leakage, short circuit, overcurrent, overvoltage, missing items and the like, can automatically trip when any fault occurs in a circuit, and can be automatically closed by a person in a remote control mode or automatically closed by setting one reclosing time after a special person confirms that a power transmission condition is safely met after the fault is relieved.
The temperature sensor is mainly used for monitoring the potential safety hazard of line temperature overrun of an electric line caused by aging and damage of an insulating layer, air humidity, loosening of electrical connection and the like.
The intelligent electric meter has the functions of metering basic electricity consumption of the traditional electric meter, and also has the intelligent functions of real-time remote electricity consumption information inquiry, manual meter reading avoidance, remote control power transmission and interruption, prepayment management and the like.
The design idea of the technical scheme is as follows: firstly, the intelligent safety electric device is most suitably arranged in the second-stage distribution box, and the intelligent safety electric device is arranged in the first-stage distribution box, so that the intelligent safety electric device is not beneficial to timely and effective monitoring of tail-end electric equipment, and the cost input is inevitably increased greatly when the intelligent safety electric device is arranged in the third-stage distribution box; secondly, intelligent security electric installation and automatic reclosing switch all possess the network communication port, and both accessible RS485 communication port realize two-way intercommunication promptly: the intelligent safety electric device controls the automatic reclosing switch to switch on and off properly, and meanwhile, the automatic reclosing switch can transmit fault signals to the intelligent safety electric device in time after a circuit fails so as to achieve the effect of sound-light alarm or remote alarm.
Based on the design, the technical scheme realizes the following functions: the fault alarm information can be obtained by a field manager (a full-time electrician or a security officer) at the first time, so that the time is saved for timely processing the potential safety hazard of the line; secondly, a shunt residual current circuit breaker is arranged in the on-site secondary distribution box, the front end of the on-site secondary distribution box is controlled by an automatic reclosing switch, namely, the automatic reclosing switch is used for replacing a main air switch in the original secondary box, and the shunt residual current circuit breaker is used for replacing a shunt air switch of the original secondary box. The arrangement can realize that when a certain branch fails, the fault can be directly reflected in the secondary box, thereby being beneficial to improving the efficiency of the circuit troubleshooting of the professional electrician; thirdly, when any one or more than one loop in the secondary box has faults of electric leakage, phase loss, leakage protection failure and the like through the determined relevant parameter values of the automatic reclosing switch, the leakage protection of the tertiary box, the shunt leakage protection corresponding to the secondary box and the reclosing switch are linked, and therefore the intelligent safety electric device is triggered to give an alarm.
The intelligent secondary distribution box for the construction site is described in detail, the principle and the implementation mode of the intelligent secondary distribution box are explained by applying the embodiment, and the description of the embodiment is only used for helping to understand the method and the core idea of the intelligent secondary distribution box; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (5)
1. The utility model provides an intelligent second grade block terminal is used to job site which characterized in that: the secondary distribution box comprises three current transformers, an intelligent ammeter, an automatic reclosing switch, a three-phase intelligent electricity utilization monitoring device, a leakage circuit breaker, a voltage open-phase protection device, a current transformer TA, a temperature sensor T and a residual current transformer;
the automatic reclosing switch is connected with an L1 phase line, a L2 phase line, a L3 phase line and a zero line, and the connected L1 phase line, L2 phase line and L3 phase line are respectively provided with a current transformer;
the three current transformers are respectively provided with a signal wire connected with the intelligent ammeter; the intelligent electric meter is electrically connected to the automatic reclosing switch through a three-phase line and a zero line; the automatic reclosing switch is electrically connected with the three-phase intelligent electricity utilization monitoring device through a zero line and a three-phase line, and a communication line is arranged on the automatic reclosing switch and connected with the three-phase intelligent electricity utilization monitoring device;
the automatic reclosing switch and the leakage circuit breaker are electrically connected with each other through a three-phase line and a zero line; a voltage open-phase protection device is respectively arranged on a three-phase line and a zero line between the automatic reclosing switch and the leakage circuit breaker, and the four voltage open-phase protection devices are connected in series and then are connected to the three-phase intelligent electricity consumption monitoring device through signal lines; the three-phase line and the zero line between the automatic reclosing switch and the leakage circuit breaker are respectively provided with a temperature sensor T, and the four temperature sensors T are connected in series and then are connected to the three-phase intelligent electricity utilization monitoring device through signal lines; a current transformer TA is arranged on each three-phase line between the automatic reclosing switch and the residual current circuit breaker, and the three current transformers TA are connected in series and then are connected to the three-phase intelligent electricity utilization monitoring device through signal lines; and a residual current transformer is arranged on a three-phase line and a zero line between the automatic reclosing switch and the residual current circuit breaker, and the residual current transformer is connected with the three-phase intelligent electricity utilization monitoring device through a signal line.
2. The intelligent secondary distribution box for the construction site as claimed in claim 1, wherein: and the plurality of residual current circuit breakers are electrically connected with the automatic reclosing switch after being connected in parallel.
3. The intelligent secondary distribution box for the construction site as claimed in claim 1, wherein: and the leakage parameter of the automatic reclosing switch is 40mA and 0.1 s.
4. The intelligent secondary distribution box for the construction site as claimed in claim 1, wherein: and the leakage circuit breaker in the secondary distribution box and the leakage circuit breaker in the tertiary distribution box have the same leakage parameters.
5. The intelligent secondary distribution box for the construction site as claimed in claim 1, wherein: the leakage parameters of the leakage circuit breaker are 160A, 30mA, 0.1s or 100A, 30mA, 0.1 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922183580.3U CN211046116U (en) | 2019-12-09 | 2019-12-09 | Intelligent second grade block terminal is used to job site |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922183580.3U CN211046116U (en) | 2019-12-09 | 2019-12-09 | Intelligent second grade block terminal is used to job site |
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| CN211046116U true CN211046116U (en) | 2020-07-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884083A (en) * | 2020-07-31 | 2020-11-03 | 山东恒威电力设备有限公司 | Intelligent comprehensive distribution box |
| CN112564103A (en) * | 2020-12-10 | 2021-03-26 | 西安航天动力研究所 | Outdoor portable power supply and distribution equipment of target field emission |
-
2019
- 2019-12-09 CN CN201922183580.3U patent/CN211046116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884083A (en) * | 2020-07-31 | 2020-11-03 | 山东恒威电力设备有限公司 | Intelligent comprehensive distribution box |
| CN112564103A (en) * | 2020-12-10 | 2021-03-26 | 西安航天动力研究所 | Outdoor portable power supply and distribution equipment of target field emission |
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