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Electrical power Cord knowledge
2011-06-04 23:15:50
 

Electrical power Cord knowledge

When the power cord is easy to install a low-level error will destroy a person's life or the life of a machine, the following science Ningboqiaopu Electric Co., Ltd knowledge you install the power cord
Using low-voltage electric pen test
Low-voltage electrical testing electric pen is a commonly used helping the security apparatus. 500V for the following investigation of various electrical conductor or housing facilities are charged. Experience a normal low-voltage electric pens, comes with, as long as the master principle of testing electric pen, well aware of the electrical bonding principles, flexibility in the use of many techniques.
(1) to determine the AC and DC power cord electrical knowledge
AC and DC electric pen judge, AC DC bright dark
AC neon tubes covered with bright, neon light end of the DC.
Explained to understand:
First, tell the reader a little bit, before the use of low-voltage electric pen test, be sure to clearly recognize the experience of charged test body; not explicitly recognized in the normal inspection before the electric pen, can not use. Identify AC, DC, the best in the "two power" comparison between, so very superficial. AC test both ends when the neon lights, neon tube when measuring DC, only one end of a very shiny.
(2) to determine the DC electrical power cord is knowledge of the cathode
Judgement is the cathode electric pen, carefully review the neon tube to be careful,
Cathode front-end is bright, bright as a positive back-end.
Explained to understand:
Neon power front-end refers to the inspection head end of the pen, holding a neon tube means the end of the back-end, front bright as the cathode, as opposed to positive. Testing to the attention of: power supply 110V and above; if people and the earth insulation, a hand touching the power of any one pole, the other people holding test pen, metal pen first touched the electric power to the test another pole, neon front very bright, touch the power supply is measured by the cathode; back if it is a very bright neon tubes, the measured power is positive touch, which is based on the current one-way flow and positive flow of electrons from the cathode to the principle.


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