(1) The opening degree (opening length) of the hook is 15%.
(2) The torsion deformation degree of the hook is 10 degrees.
(3) Plastic deformation of the hook section or the hook neck.
(4) There are cracks on the surface.
(5) Wear of the hook
a According to the national standard, the hook wear reaches 5% of the original size;
b Hooks wear to 10% of the original size according to industry standards.
Electrical Switchgear Protection
Definition of Switchgear
A switchgear or electrical switchgear is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system. Assembly of such devices in a logical manner forms switchgear. In other words apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. This is very basic definition of switchgear.
Electrical Switchgear
Electrical Switchgear,Medium Voltage Switchgear,Low Voltage Switchgear,High Voltage Switchgear
Yangzhong Huaxin Power Equipment Co.,Ltd , http://www.huaxinbusbarchina.com