Three-phase power zero-sequence current transformer with real-time temperature detection function
A technology of three-phase electric power and zero-sequence current, which is applied in the field of electric power, can solve problems such as restrictions on the application and promotion of zero-sequence current transformers, and achieve the effects of good anti-loosening, easy installation, and labor-saving operation
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Embodiment 1)
[0022] This embodiment is a three-phase power zero-sequence current transformer with real-time temperature detection function, see Figure 1 to Figure 8 As shown, it includes a pressing bolt 1 , a core tube 2 , a set of crimping assembly 3 , a current transformer 7 and a set of pressing jaw assembly 9 .
[0023] In this embodiment, the core tube 2, the crimping assembly 3 and the pressing claw assembly 9 are all made of insulating materials.
[0024] The tube wall of the core tube is provided with a group of guide holes, and the group of guide holes includes four radial guide slide holes 22, and the four radial guide slide holes are evenly distributed on the core tube wall along the circumference of the core tube; The guiding sliding holes all penetrate the core tube wall along the radial direction of the core tube; each radial guiding sliding hole is located in the middle of the core tube in the axial direction, and the cross-sectional shape of each radial guiding sliding hol...
Embodiment 2)
[0043] This embodiment is basically the same as Embodiment 1, the difference is: see Figure 9 to Figure 10 As shown, in this embodiment, the ring-shaped inductive sensing body is sleeved and fixed on the outer peripheral wall of the pressure plate; the outer wall of the core tube, the outer wall of the crimping piece and the inner wall of the ring-shaped sensing body are clamped to form a plurality of accommodating cavities 73, intelligently controlled The module is arranged in the accommodation cavity. This structure can make full use of the space and is conducive to the overall small size and integration.
Embodiment 3)
[0045] This embodiment is basically the same as Embodiment 1, the difference is: see Figure 11 to Figure 12 As shown, at least one crimping member 31 is provided with a mounting screw hole 315 penetrating through the wall of the pressing plate portion 311 in the radial direction of the core tube; a temperature sensing device 8 is fixedly installed in the mounting screw hole.
[0046] The temperature sensing device 8 includes a metal housing 81 made of metal material with a containing groove 811, a temperature sensor 82 arranged in the containing groove, and a spring 83 for crimping the temperature sensor on the bottom wall of the containing groove , The screw tube plug 84 that is used for limit spring.
[0047] One end 812 of the metal shell close to the central axis of the core tube is provided with a heat conduction boss 813 used as a puncture, and one end 814 of the metal shell away from the central axis of the core tube is provided with an inner hexagonal screw groove 815...
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