Safety protection device for three-phase isolating switch

• Main Authors: TIAN BAOSHU, WANG YUJUN, DING XUE, XU JING, CUI GUIWEI, WANG GANG, CHEN DEHONG, KONG FANJI, LI GUANGCHEN, LIU LI
• Format: Patent
• Language: Chinese; English
• Published: 29.01.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

The invention relates to a safety protection device for a three-phase isolating switch. The protection device is provided with a square insulating plate, an insulating handle is arranged at a position, close to the end, of one face of the insulating plate, a pair of clamping pieces are arranged at the position, opposite to the insulating handle, of the other face of the insulating plate, and the clamping pieces can be clamped on a moving contact of the isolating switch. The insulating handle can be a spherical handle/a cylindrical handle/a square column-shaped handle which is installed at a single end, and can also be a handle-shaped handle which is installed at two ends. The clamping piece can be a U-shaped clamp formed by bending a strip-shaped metal plate, and an installation hole is formed in the bottom of the middle of the U-shaped clamp. The clamping piece can also be a clamp composed of a pair of right-angled metal sheets, and an installation hole is formed in one right-angle side of each right-angled