CN2256155Y

CN2256155Y - Plastic sealed current mutual inductor

Info

Publication number: CN2256155Y
Application number: CN 96206552
Authority: CN
Inventors: 孔繁友; 彭凤品; 孔炎
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-21
Filing date: 1996-03-21
Publication date: 1997-06-11
Anticipated expiration: 2006-03-21

Abstract

The utility model relates to a plastic current mutual inductor used for electric power trade. The utility model is characterized in that an iron core is a joint which presents an air gap of 45 DEG; a primary winding is wound on a plastic skeleton; the outer part of conductive body of the primary winding is sealed by a plastic sealed cover and sheathed on a secondary winding which is arranged on the iron core; lead wires are respectively arranged on the primary and secondary windings to lead in voltage power supply or output current; meanwhile, a multipurpose iron core can be additionally arranged in the same winding. The utility model has the advantages of novel structure, low cost, small size, light weight, high precision, complete function, simple production process, high safety, accurate measurement and bright prospect.

Description

The plastic packaging current transformer

The utility model relates to a kind of electric power and already goes up the plastic packaging current transformer of using.

Present electric power is already gone up the 6-10KV current transformer that uses and is oil immersed type or two kinds of structures of poured with epoxy resin formula; oil immersed type is to be made of iron core, first and second winding, fuel tank and fluid thereof, porcelain insulator, and cast-type is reached to prop up by iron core, first and second winding, insulating part and is configured to, and its structural volume is big; heavy; the cost height, easy oil impregnate (or easily discharge), complex manufacturing; explosive; precision is low, and has only two kinds of accuracy classes of metering/protection of instrumentation, is unsuitable for modern management.

The purpose of this utility model provides a kind of novel electric power and already goes up the plastic packaging current transformer of using.

The purpose of this utility model is achieved like this, adopt the cold-reduced silicon sheet iron core of high magnetic flux density, high permeability, it is 45 ° of seams that iron core is air gap, winding is on the plastic skeleton of high pressure resistant, high temperature, one time winding electric conductor outside is sealed by the plastic seal cover, on the iron core 1 secondary winding is arranged, to produce induced current.

Its novel structure of the utility model, cost is low, and volume is little, and is in light weight, the precision height, function is complete, and production technology is simple, and is safe and reliable, and accurate measurement is easy to apply, and has a bright future, and the modern management and the use that can be the electric power industry bring new vitality.

Below in conjunction with accompanying drawing structure of the present utility model is elaborated.

Fig. 1 is a structure front view of the present utility model.

Fig. 2 is a structure vertical view of the present utility model.

Fig. 3 is many core structures of the utility model figure.

By shown in Figure 1, the utility model is to use high magnetic flux density, the cold-reduced silicon sheet iron core 1 of high permeability, it is 45 ° of seams that iron core 1 is air gap, and a winding 4 is on plastic skeleton 3, and one time winding 4 electric conductor outsides seal with plastic seal cover 5, be sleeved on the secondary winding 2 on the iron core 1, have on the secondary winding on 7, windings of lead-out wire lead-out wire 6 is arranged, draw seal closure 5.Other is with former same level instrument transformer.

The utility model adopts high magnetic flux density, cold-reduced silicon sheet iron core 1 air gap of high permeability is 45 ° of seams, contact area is bigger by about 40% than 90 ° of contacts of conventional current transformer iron core, reduce leakage field and magnetic resistance, improved permeability, improve a rank than former same iron core precision, also can be made into same level S level, reduce the error in dipping of 5% rated current, solved the low big difficult problem of load error in dipping of 6-10KV power consumer, adopt on the plastic skeleton 3 insulation level that can improve 4 pairs of secondary winding 2 of a winding and iron core 1 around winding 4, plastic seal cover 5 is high pressure resistant, high temperature is used to prevent that high voltage is to iron core 1 discharge.According to electromagnetic induction principle,, high voltage, big electric current have big electric current to pass through when being fed in 4, windings of a winding by a winding leads 6, iron core 1 induction produces magnetic field, secondary winding 2 induces the little electric current that is fit to measurement, through 7 outputs of secondary winding lead-out wire, to reach the metering purpose.For solving present electric power industry electric energy metrical; measuring instrument and protection, shake control remote measurement mutual problem; the utility model can be fabricated to other 0.5S level of single-stage or the special-purpose current transformer of 0.2S level electric energy metrical; one-tenth 0.5S also capable of being combined or 0.2S level/0.5 grade electric energy metrical/instrument protection current transformer; one-tenth 0.5S also capable of being combined or 0.2S/0.5 level/0.5 grade electric energy metrical/instrument protection/remote-control romote-sensing three Current Transformer, as shown in Figure 3.By shown in Figure 3; in a same winding 4, iron core 8 and iron core 10 can be housed; dotted line iron core 8 is the instrument protection iron core; dotted line iron core 10 has instrument protection secondary winding 9 and lead-out wire 13 thereof for remote control, remote measurement iron core on the iron core 8, remote control, remote measurement secondary winding 11 and lead-out wire 14 thereof are arranged on the iron core 10; for easy to use; answer user's requirement, one time winding lead-out wire direction can change, a winding lead-out wire 12 as shown in phantom in Figure 3.This shows that the utility model is installed and used very convenient, and can change system into multifunctional mutual-inductor easily that it is the innovation greatly to existing current transformer, must and promote the use of and bring new life for the electric power modern management of industry.

Claims

1, a kind of plastic packaging current transformer that constitutes by iron core, first and second winding, it is characterized in that it is 45 ° of seams that iron core (1) is air gap, a winding (4) is on plastic skeleton (3), a winding (4) electric conductor outside seals with plastic seal cover (5), be sleeved on the secondary winding (2) on the iron core (1), lead-out wire (7) is arranged on the secondary winding, lead-out wire (6) is arranged on the winding, draw seal closure (5).

2, plastic packaging current transformer according to claim 1; it is characterized in that in the said winding (4) iron core (8) and iron core (10) being housed; instrument protection secondary winding (9) and lead-out wire (13) thereof are arranged on the iron core (8), remote control, remote measurement secondary winding (11) and lead-out wire (14) thereof are arranged on the iron core (10).