Method and apparatus capable of realizing safe hot plug of secondary current loop of transforming plant

Abstract

The invention relates to a method and a device which can realize the safe hot plug of a secondary current circuit of a transformer substation, which belongs to the field of safe devices. The device comprises an access terminal of a secondary circuit current transformer and a current transformer to be accessed, a plug-in spring assembly with a binary elastic contacts is arranged between connection terminals of the access terminal of the current transformer; meanwhile, a bidirectional diode set is arranged, and an insert plate with conducting layers which are arranged on the two sides and mutually insulated is also arranged, and the conducting layers of the two sides of the insert plate are respectively and electrically connected with the two ends of a primary coil of the current transformer to be accessed. By adopting the double means of mechanical technology and electronic technology, the method and the device ensure that commissioning / disengaging of the secondary circuit is under the protection of the simplest and most reliable technology, and the 'hot plug' of the secondary current circuit of an electroprobe of the transformer substation is realized, thus greatly simplifying the fussy overhaul, replacement, testing and debugging of a measuring device in the running course, and improves the running reliability of the equipment. The method and the device can be widely applied to the fields of electrical measurement or monitoring of the power transformation and distribution systems.

Description

technical field [0001] The invention belongs to the field of safety devices, in particular to a safety connection device for a secondary current circuit of a substation electric measuring meter. Background technique [0002] The secondary current loop must be sampled in the process of substation electrical monitoring and monitoring. [0003] In the past, a large number of secondary instruments in substations used a panel structure, but now more and more microcomputer measurement / digital processing technologies are used. [0004] But no matter what, the measuring equipment and the secondary voltage and current circuits all have "interfaces" connected by wires. Due to the characteristics of the secondary current of the current transformer (CT), the secondary circuit must not be open during operation. The high voltage generated by the open circuit of the secondary circuit will pose a threat to personal safety, and will also cause the primary CT to heat up and cause hidden dang...

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Problems solved by technology

[0010] In the fields of PCs and communication systems, the design of hot-swappable circuits is widely used. However, as far as the applicant knows, in the field of power transformation and distribution and / or power transmission and transformation industries, for the secondary current loop of the electric meter in the substation, There is no technical solution with similar functions or the same technical effect to choose from or implement

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