CN204130337U - A kind of D type split core type current transformer - Google Patents

Abstract

The utility model discloses a kind of D type split core type current transformer, comprise terminals, shell, iron core and secondary coil, it is characterized in that described terminals are 2, be positioned on shell, be connected to two outputs of secondary coil respectively, described iron core is D type, be divided into U-shaped iron core and columnar iron core two parts, U-shaped mandrel bottom embeds in shell, described secondary coil is wound on U-shaped iron core bottom, two outputs of secondary coil are connected respectively to and connect on a terminals, cross section be identical square, adopt opening tenon structure joggle together, described U-shaped iron core two ends have tongue-and-groove, columnar iron core two end respectively has a tenon, tenon can embed in tongue-and-groove just, the drum stand that there is flexible insulating material and make is adopted in the middle part of columnar iron core, described drum stand is divided into bottom framework, pillar, wire clamp three part.

Description

A kind of D type split core type current transformer

Technical field

The utility model relates to a kind of current transformer.

Background technology

Because general voltage is all higher in the circuit of generating, power transformation, transmission of electricity, distribution and electricity consumption, and comparatively large by electric current, adopt the method for open-circuit line series connection access checkout equipment to measure its electric current and there is greater risk, general little employing.In prior art, the current transformer that adopts detects the electric current in its circuit more.Jaw type current transformer is used for circuital current, energy measuring, adopt C shaped iron core, open jaw in use, using circuit to be measured on iron core around 1 circle or multiturn as one-level coil, closed jaw, can in the secondary coil of iron core, produce induced current and detect, in order to ensure detect data consistency, the winding position of circuit to be measured on iron core should be consistent at every turn as far as possible, but in actual use, due to the restriction of Test Field objective condition, the winding position consistency of circuit to be measured on iron core is difficult to ensure, and one-level coil is when needing multiturn, need to open jaw and carry out coiling again, then the consistency of winding position is more difficult to keep, and adopt the iron core of pincer structure, it is opened, closed and locking relies on axle pivot, the device such as spring or hasp, one be lock not tight, cause iron core air gap to change greatly and affect accuracy of measurement, two is easily cause greater impact and the wearing and tearing of iron core joint to iron core contact surface, the useful life of accuracy of measurement and instrument transformer can be affected equally, therefore one is provided can to adjust the cable number of turn to be measured easily, the split core type current transformer detecting consistency good becomes problem demanding prompt solution in prior art.

Utility model content

For solving aforementioned technical problem, the utility model provides a kind of D type split core type current transformer, comprise terminals, shell, iron core, secondary coil, it is characterized in that described terminals are 2, be positioned on shell, be connected to two outputs of secondary coil respectively, described iron core is D type, be divided into U-shaped iron core and columnar iron core two parts, U-shaped mandrel bottom embeds in shell, described secondary coil is wound on U-shaped iron core bottom, two outputs of secondary coil are connected respectively on two terminals, the cross section of U-shaped iron core and columnar iron core is identical square, adopt opening tenon structure joggle together, described U-shaped iron core two ends have tongue-and-groove, columnar iron core two end respectively has a tenon, tenon can embed in tongue-and-groove just, the drum stand that there is flexible insulating material and make is adopted in the middle part of columnar iron core, described drum stand is divided into bottom framework, pillar, wire clamp three part, bottom framework to be enclosed within columnar iron core and slidably, pillar bottom connects with bottom framework outer surface, top connecting clamp upper surface, wire clamp is the U-shaped folder of top relative to adduction, for blocking cable to be measured, the joggle place at described columnar iron core two ends and U-shaped swage two ends is provided with the C-type clamp tool of spiral lock locking structure, the clip position of described fixture is the outer surface of tongue-and-groove, described spiral lock locking structure is divided into connecting portion and screw rod, be installed on C-type clamp tool two-arm respectively close to end, connecting portion is cylinder, one end is connected to the inner side of C-type clamp tool one knee-joint close end, the other end is arranged on the fixing hole of described U-shaped iron core tongue-and-groove outer surface, another knee-joint close end place of C-type clamp tool has inside and outside screwed hole, described screw threaded aperture precession is to lock C-type clamp tool.

Described terminals are selected from binding post or jack.

The instrument transformer that the utility model provides, separable opening tenon structure is adopted between two parts iron core, can avoid existing employing axle pivot class or other elastomeric elements as spring etc. realize the opening and closing of transformer iron core time, air gap between iron core is aging because of elastomeric element, or the wearing and tearing of axle pivot and become large, adopt the mode at iron core junction fixed installation C-type clamp tool, can when iron core joint possesses certain wearing and tearing, by screw rod locking avoid joint to produce Detection results that excessive air gap affects instrument transformer, drum stand simultaneously by being set with on columnar iron core, the coil clamping that cable to be measured is formed, and cable two ends are clipped in wire clamp, thus each consistency detected can be improved, improve accuracy of detection.

Accompanying drawing explanation

Fig. 1 for the utility model provide split core type current transformer entirety assembling schematic diagram;

Fig. 2 is the structural representation of C-type clamp tool.

Embodiment

Its overall assembling schematic diagram of the D type split core type current transformer that the utility model provides as shown in Figure 1 (in Fig. 1, C-type clamp tool is not drawn) described D type split core type current transformer device comprises terminals 3, shell 2, iron core, secondary coil, terminals are 2, be positioned at outer surface of outer cover, be connected to two outputs of secondary coil respectively, described iron core is D type, be divided into U-shaped iron core 1 and columnar iron core 4 two parts, U-shaped mandrel bottom embeds in shell, the cross section of U-shaped iron core and columnar iron core is identical square, the described cross-sectional square shape length of side is 2cm, columnar iron core length is 8cm, core interior aperture area is 16cm ²described secondary coil is wound on U-shaped iron core bottom (omit in figure and do not draw), its two output is connected with two terminals respectively, terminals adopt binding post structure, U-shaped iron core and columnar iron core adopt together with opening tenon structure joggle, and U-shaped iron core two ends have tongue-and-groove 1.1, and columnar iron core two end respectively has a tenon 4.1, tenon can embed in tongue-and-groove just, adopts the drum stand 5 having flexible insulating material and make in the middle part of columnar iron core.

Described drum stand, be divided into bottom framework 5.3, pillar 5.2, wire clamp 5.1 3 part, for blocking cable to be measured, bottom framework is enclosed within columnar iron core and can apply larger axis to sliding axially along columnar iron core during power, pillar bottom connects with bottom framework outer surface, top connecting clamp upper surface, wire clamp is the U-shaped folder of top relative to adduction, and the inner the widest part of wire clamp is 0.8cm, and wire clamp and pillar total height are 1.0cm, in the present embodiment, drum stand has two, the joggle place at described columnar iron core two ends and U-shaped swage two ends is provided with the C-type clamp tool of spiral lock locking structure, and (Fig. 2 is shown in by described C-type clamp lamps structure schematic diagram, do not draw in Fig. 1), the clip position of described C-type clamp tool 6 is the outer surface of tongue-and-groove, described spiral lock locking structure is divided into connecting portion 6.1 and screw rod 6.3, be installed on C-type clamp tool two-arm respectively close to end, connecting portion is cylinder, one end is connected to the inner side of C-type clamp tool one knee-joint close end, the other end is arranged on the fixing hole 1.2 of described U-shaped iron core tongue-and-groove outer surface, another knee-joint close end place of C-type clamp tool has inside and outside screwed hole 6.2, described screw rod coordinates with screwed hole, precession can be locked by C-type clamp tool.

Claims (2)

1. a D type split core type current transformer, comprise terminals, shell, iron core, secondary coil, it is characterized in that described terminals are 2, be positioned on shell, be connected to two outputs of secondary coil respectively, described iron core is D type, be divided into U-shaped iron core and columnar iron core two parts, U-shaped mandrel bottom embeds in shell, described secondary coil is wound on U-shaped iron core bottom, two outputs of secondary coil are connected respectively on two terminals, the cross section of U-shaped iron core and columnar iron core is identical square, adopt opening tenon structure joggle together, described U-shaped iron core two ends have tongue-and-groove, columnar iron core two end respectively has a tenon, tenon can embed in tongue-and-groove just, the drum stand that there is flexible insulating material and make is adopted in the middle part of columnar iron core, described drum stand is divided into bottom framework, pillar, wire clamp three part, bottom framework to be enclosed within columnar iron core and slidably, pillar bottom connects with bottom framework outer surface, bottom the connecting clamp of pillar top, wire clamp is the U-shaped folder of top relative to adduction, for blocking cable to be measured, the joggle place at described columnar iron core two ends and U-shaped iron core two ends is provided with the C-type clamp tool of spiral lock locking structure, the clip position of described fixture is the outer surface of tongue-and-groove, described spiral lock locking structure is divided into connecting portion and screw rod, be installed on C-type clamp tool two-arm respectively close to end, connecting portion is cylinder, connecting portion one end is connected to the inner side of C-type clamp tool one knee-joint close end, the connecting portion other end is arranged on the fixing hole of described U-shaped iron core tongue-and-groove outer surface, another knee-joint close end place of C-type clamp tool has inside and outside screwed hole, described screw threaded aperture precession is to lock C-type clamp tool.

2. D type split core type current transformer as claimed in claim 1, is characterized in that described terminals are selected from binding post or jack.