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Lockout circuit for PT cabinet grounding handcart

A blocking circuit and blocking circuit technology, applied in the field of electric power, can solve problems affecting the safety of the power system, increasing the complexity of the blocking circuit, etc., and achieve the effect of improving safety and simplifying the blocking circuit

Inactive Publication Date: 2016-09-21
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the widely used electrical locking scheme is to lock through the PT grounding handcart in this section. Since the grounding handcart itself cannot lead to so many auxiliary contacts, it is necessary to use relays for expansion, and then connect the expansion contacts to other switch cabinets in this section, and Connected in series to the locking circuit, which greatly increases the complexity of the locking circuit and affects the safety of the power system

Method used

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  • Lockout circuit for PT cabinet grounding handcart

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Embodiment Construction

[0013] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations all fall into the scope of the appended claims. within the limited range.

[0015] Such as figure 1 As shown, the embodiment of the present invention provides a PT cabinet grounding handcart locking circuit, including:

[0016] A plurality of auxiliary contacts YW1-4 of the grounding handcart are electrically connected to the control small bus KM and the blocking small bus YW+ / YW- respectively, and the blocking small bus is electrically connected to the blocking circuit. Specifically, the blocking circuit is located in other switchgears on the same section of...

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Abstract

The invention discloses a lockout circuit for a PT cabinet grounding handcart. The lockout circuit comprises multiple auxiliary contacts of the grounding handcart, wherein the multiple auxiliary contacts are electrically connected to a control miniature bus and lockout miniature buses respectively; and the lockout miniature buses are electrically connected to a lockout loop. Therefore, a repeat relay is omitted, the lockout loop is simplified, and the safety is improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a PT cabinet grounding handcart locking circuit. Background technique [0002] The busbar grounding handcart is generally installed in the voltage transformer cabinet (PT cabinet), and the voltage transformer cabinet (PT cabinet) is equipped with auxiliary contacts and secondary wiring of the voltage transformer handcart and the busbar grounding handcart. Pull out the busbar grounding handcart from the voltage transformer cabinet (PT cabinet) during normal operation, push the voltage transformer handcart into it for metering or measurement work; pull out the voltage transformer handcart during maintenance, and put the busbar grounding handcart The cart is pushed into the potential transformer cabinet (PT cabinet) to ground the busbar reliably, which improves the work efficiency during maintenance. It can be seen that the busbar grounding handcart is an indispensable safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B11/133H02B11/167
CPCH02B11/133H02B11/167
Inventor 单长星李文升徐群韩颖杨继超李芳刘培剑张珊
Owner STATE GRID SHANDONG ELECTRIC POWER