CN2821588Y

CN2821588Y - Low voltage power line health detector

Info

Publication number: CN2821588Y
Application number: CN 200520031167
Authority: CN
Inventors: 杨渊
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-06
Filing date: 2005-07-06
Publication date: 2006-09-27
Anticipated expiration: 2015-07-06

Abstract

The utility model discloses a low voltage power line health detector which has the advantages of powerful functions, low cost, simple operation, high work efficiency and portability and comprises a test circuit and a telescopic insulating operating lever, wherein the test circuit is formed by in series connecting an ampere meter and a parallel circuit which is composed of four tong-shaped current transformers. Insulating draw rings are arranged on tong rams of the tong-shaped current transformers of which the bottoms are provided with sockets on which the insulating operating lever is sheathed. The utility model is suitable for the operation and the maintenance of a low-voltage current line and is suitable for searching line faults.

Description

The low-voltage power line health detector

Technical field:

The utility model relates to the power circuit pick-up unit, more particularly, relates to a kind of low-voltage power line health status detector.

Background technology:

Low-voltage power line belongs to the electrical network end, and distributed points is many and wide, and its health status directly influences the low voltage electric network safe and reliable operation.Judge that at present low voltage electric network health status mainly contains three kinds of methods: 1, by artificial visual inspection.2, utilize insulation megger power failure detection line insulation resistance.3, utilize earth leakage protective device to detect leakage current.First method wants completely the road to make an inspection tour, and can only find tangible fault and hidden danger, as: porcelain vase breaks, broken string, short circuit, ground connection, screen of trees etc., and the low hidden danger of dielectric level can not be found; Second method must have a power failure and could implement, and is difficult for finding the particular location of hidden danger; Though the third method must not have a power failure, can only reflect the integral status of circuit, can't judge the particular location of hidden danger.Utilize above-mentioned three kinds of methods to search thin spot and trouble spot that circuit exists, waste time and energy, and efficient is extremely low.

The utility model content

The purpose of this utility model is when circuit is safeguarded and checked, provide a kind of powerful, cost is low, simple to operate, high efficiency, portable low-voltage power line health status detector.

The technical solution of the utility model is: a kind of low-voltage power line health detector, comprise testing circuit, concertina type insulating bar composition, described testing circuit is that reometer of serial connection constitutes on the parallel circuit of being made up of four split core type current transformers, and the tong arm of described split core type current transformer is provided with the insulation draw ring.The bottom of described split core type current transformer is provided with the socket for the insulating bar socket.

The range of described current transformer is that milliampere level is to hundred peace levels.

The same range of described reometer and current transformer.

Advantage of the present utility model: the utility model can chargedly be diagnosed the low-voltage power line insulation status, find out thin spot so that scheme of arrangement maintenance targetedly, in order to avoid further developing, thin spot causes fault outage, the generation of minimizing equipment or personal safety accident or fire failure, reduce leakage current loss, improve power supply quality.In addition, the utility model also can be used for searching in the line loss management three-phase load reason of unbalanced and leveling load, but also can search the faults such as the non-full relative ground circuit of circuit, broken string of charging operation still, improves the power supply benefit.Therefore, the utlity model has of many uses,, powerful, circuit structure is simple, processing cost is low, carry and advantage such as easy to operate.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is a fundamental diagram of the present utility model.

Embodiment

Structure of the present utility model as shown in Figure 1, form by testing circuit and concertina type insulating bar, described testing circuit is that reometer of serial connection constitutes on the parallel circuit of being made up of four split core type current transformers, and the tong arm of described split core type current transformer is provided with the insulation draw ring.The bottom of described split core type current transformer is provided with the socket for the insulating bar socket.The socket 5 of four same split core type current transformers 1 by its bottom is socketed on the top of insulating bar 3, the tong arm of split core type current transformer 1 is provided with the insulation draw ring 4 that can make the current transformer opening and closing for terrestrial operation, preferably select for use nonmetallic materials to make, make the tong arm opening and closing of split core type current transformer 1 on the ground by the stretching of nylon withdrawal line 6.

As shown in Figure 2, anywhere on the line blocks a last split core type current transformer 1 respectively with three live wires and a zero line, by 8 cross section 4mm ²Insulation soft copper lead 7 is connected in series a last reometer 2 again with behind four split core type current transformers, 1 head end mutual connection, the tail end mutual connection, and split core type current transformer 1 and reometer 2 same ranges, range all are that milliampere is to hundred peace levels, as 300A, 500A, 800A.

When circuit substantially just often, reometer 2 readings have only about tens or 100 milliamperes; Reduce mutually entirely or during non-full relative ground circuit when circuit somewhere insulation is non-, reometer 2 readings up to the hundreds of milliampere to hundreds of peace or bigger; When circuit somewhere three-phase broke, reometer 2 readings were several milliamperes or zero.In addition, only be stuck in to detect on four lines and can judge the specifically separate of short circuit and broken string, also can judge the balance of three-phase load when circuit normally moves with a current transformer 1.

Claims

1, a kind of low-voltage power line health detector is made up of testing circuit, concertina type insulating bar, it is characterized in that: described testing circuit is that reometer of serial connection constitutes on the parallel circuit of being made up of four split core type current transformers; The tong arm of described split core type current transformer is provided with the insulation draw ring;

The bottom of described split core type current transformer is provided with the socket for the insulating bar socket.

2, according to the described low-voltage power line health detector of claim 1, it is characterized in that: the range of described current transformer is that milliampere level is to hundred peace levels.

3, according to the described low-voltage power line health detector of claim 1, it is characterized in that: the same range of described reometer and current transformer.