Name explains two

 1,high voltage test pen:used to check the high voltage distribution network equipment,overhead lines,cable whether electric tools.2,grounding line,to the surprise appearance has power equipment and line voltage single phase ac motor to ensure staff's important tool.According to the provisions of the enterprise in ground wire must be at least 25 mm 2 bare copper cord.3,sign:used to warn people not close to the equipment and charged part,instructions for personnel work,remind to take safety precautions,and banning trace a device or a period of circuit switching power on board.Can be divided into the warning classes,allowing,prompt and banned the and so on.4,covering bar:to prevent staff had no intention of encounter charged equipment parts and equipment screen protector,temporarily hide column and permanent column two.5,insulating rod:also called the www.facebook.com/dongfeng.motor g rods,insulating rod,operation,etc.Insulating rods by working head,insulation and handle three parts.

It in a closed or open high-voltage isolating switch,portable earthing line installation,as well as the measurement and test.Step 6,:if the ground horizontal distance of 0.8 m has a potential difference between two points,when the two feet of human exposure to the two points,in the human body will withstand voltage,the voltage is called the step voltage.The biggest step in from the ground of the grounding body between the grounding body and horizontal distance of 0.8 m.Is 7,phase sequence,phase sequence,is an alternating current instantaneous value changes from negative to positive after zero order in turn.8,the power grid,power grid is part of the power system,it is made of all kinds of transformer substations (by) and different voltage grade of transmission,power 5kw permanent magnet generator distribution lines connected to form a unified network.9,electric power system,power system is a part of power system,it is composed of power plant generators and power distribution equipment,step-up and step-down substation,transmission and distribution lines and the users of electricity equipment.10,power system,power plants,substation mini electric motor and power users of electricity equipment,and its to the power grid and the thermal network (or hydraulic) system connected is called dynamic system as a whole.