CN202494712U - Portable metering device for electricity utilization of unit - Google Patents

Abstract

The utility model relates to a portable unit electricity metering device, the structure of which is that the plugs of current transformers are respectively connected with electric energy meters; the three phases of voltage lines A, B, and C are respectively connected with electric energy meters V _A , V _B , and V _C ; The neutral wire is connected to the N socket; the ground wire of the current transformer and the neutral wire of the electric energy meter are connected to the corresponding grounding and neutral wire insertion holes respectively. The utility model realizes the further refinement and decomposition of the loss analysis of the low-voltage station area. Through the combination of the open-type current transformer and the electric energy meter, it is designed and manufactured into a portable, flexible and movable metering device. The power consumption measurement of units and sections can minimize the analysis of power loss under the assessment table of the station area, and accurately locate high-loss points. It has wide application value and is convenient and easy to make. It is very practical especially for preventing electricity theft by using the external wiring of the power line.

Description

Portable unit electricity metering device

technical field

The utility model relates to an electricity metering device, in particular to a portable unit electricity metering device, which belongs to the electric power application field.

Background technique

Over the years, the power supply company has continuously carried out in-depth research and discussion on the management of line loss and compression, and has obtained a lot of valuable experience and remarkable results.

In the management and analysis of losses in low-voltage station areas, each low-voltage station area is generally taken as the basic assessment unit. With the continuous deepening of the contracting work in the low-voltage station area, how to minimize the scope of investigation, delineate the loss area, lock key customers, accurately identify high-loss points, conduct targeted inspections of electricity consumption, and carry out loss reduction work has always been an issue. It is an important subject to earnestly do a good job in pressure analysis and deepen the management of low-voltage line loss.

In the area loss analysis, the statistical analysis of the station area loss is calculated based on the difference between the electricity in the station area assessment table and the sum of the electricity generated by the users in the station area, that is: the station area loss rate (%) = (Amount of power distribution in the station area - ∑ Electricity for users in the station area)/Amount of power distribution in the station area.

Due to the different load conditions of low-voltage station areas, it has been difficult to directly determine the main factors affecting the line loss rate for a long time, especially for station areas with relatively many low-voltage users, such as residential areas, buildings, and areas with complex power load distribution. point.

If in the statistical analysis, it is possible to further decompose the loss of the station area, determine the loss of the station area to a certain unit, a certain section or even a certain household, and refine and quantify the loss in detail, then it is of great significance for the loss management of the station area .

Contents of the invention

The utility model aims at the problems in the above-mentioned prior art, and provides a portable unit electricity metering device, which solves the problem in the prior art that it is difficult to directly determine the main points that affect the line loss rate.

The technical scheme of the utility model is as follows:

Set as A, B, C, N three-phase four-wire connection; the current transformer plugs are connected to the electric energy meter respectively; the three-phase voltage lines A, B, C are respectively connected to the electric energy meter V _A , V _B , V _C ; the neutral line Connect to the N socket; the grounding wire of the current transformer and the neutral wire of the electric energy meter are respectively drawn and connected to the corresponding grounding and neutral wire insertion holes.

The current transformer is a clamp-shaped open current transformer.

The electric energy meter is a three-phase four-wire electric energy meter.

The advantages and effects of the present utility model are as follows:

1. The clamp-shaped open-type current transformer can measure and compare various electrical parameters in the state of uninterrupted power supply. It can be quickly assembled and disassembled without power off or disconnection, and is easy to operate.

2. Realized the further refinement and decomposition of the loss analysis of the low-voltage station area. Through the combination of the open-type current transformer and the electric energy meter, a portable, flexible and movable metering device was designed and manufactured, and the sub-units of the users in the station area were designed and manufactured. The measurement of power consumption in 1, section can minimize the analysis of power loss below the assessment table in the station area, and accurately locate the high loss point. It has wide application value, is convenient and easy to implement, and is simple to make. It is very practical especially for preventing electricity theft by using the external wiring of the power line.

3. Before the trial use of the utility model, the loss rate was more than 9%. After the trial application, the loss rate in the low-voltage station area has dropped to 8.08%. With the further extensive application, there is still a large room for loss reduction in the future . As far as the current situation is concerned, it is estimated that through widespread application, decomposition, refinement, and directional analysis of the lost electricity, and targeted management and technical measures, the loss can be reduced to less than 7%, which can greatly reduce enterprise losses and improve economic benefits.

4. Through the inspection, measurement and analysis of the high-loss section, effectively organize the inspection manpower, find out the cause of the high loss in time, especially accurately lock the electricity-stealing users, in order to maintain the normal power supply order, increase the anti-theft power, Effectively carry out electricity inspection work, providing more convenient and flexible tools and convenient conditions.

5. Since this device can be used without power outage, on the one hand, it ensures the reliability of power supply, ensures the high-quality service commitment of the power supply company, and ensures the right of users to use electricity normally. On the other hand, it avoids the reduction of electricity sales due to frequent power outages caused by inspections, and ensures the increase in supply and sales.

6. The structure is simple, the practicability is strong, safe and reliable, the cost is low, and it has a strong promotion and application value.

Description of drawings

Fig. 1 is a schematic block diagram of the structure of the utility model.

Fig. 2 is a schematic diagram of the connection of the utility model.

Detailed ways

Example

As shown in Figure 1, it is set to A, B, C, N three-phase four-wire connection; clamp-shaped open-type current transformers I _A1 and I _A2 , I _B1 and I _B2 , I _C1 and I _C2 plugs, respectively, and three I _A1 and I _A2 , I _B1 and I _B2 , I _C1 and I _C2 of the four-phase four-wire electric energy meter are connected; the voltage lines A, B, and C are respectively connected to the electric energy meter V _A , V _B , and V _C ; the neutral line Connect to the N jack. The grounding wire of the current transformer and the neutral wire of the electric energy meter are respectively led out and connected to the corresponding grounding and neutral wire insertion holes.

The device is installed as a three-phase four-wire connection. When wiring, connect the measured line voltage A phase, B phase, C phase and neutral line to the A, B, C, N jacks of the device in sequence; The current transformers I _A1 and I _A2 , I _B1 and I _B2 , I _C1 and I _C2 are connected to corresponding current input jacks. Before work, connect the voltage line, and after the current transformer is connected and checked, turn on the power switch and start working.

The utility model is used to check the local single or multiple users under the condition of ensuring the power supply reliability rate of the user and the state of non-stop power supply, that is, subdividing the load below the station area into more than 2 sections and units. Each building or unit is independently tested to minimize the investigation scope of low-voltage station areas, delineate loss areas, lock key users, accurately find out high-loss points, and conduct key inspections.

Claims (3)

1. portable unit electricity consumption WT-MSR is characterized in that being set to A, B, C, the wiring of N three-phase and four-line; The current transformer plug is connected with electric energy meter respectively; Pressure-wire A, B, C three-phase respectively with electric energy meter V _A, V _B, V _CConnect; Zero line inserts the N jack; Current transformer ground wire, electric energy meter zero line are drawn respectively and are connected to corresponding ground connection and zero line plug wire hole.

2. portable unit electricity consumption WT-MSR according to claim 1 is characterized in that described current transformer is pincerlike open type current transformer.

3. portable unit electricity consumption WT-MSR according to claim 1 is characterized in that described electric energy meter is the three-phase and four-line electric energy meter.

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