Street lamps use wire should pay attention to

Believe everyone see to the street lamp on the obvious way. In fact the construction and operation system of street lamp is very complex, how much you know? The following follow high lamp manufacturers look at together.

to compensate direct touch touch protective measures, selection of the current electrical maintenance, is the other straight touch touch the lamp fails to choose additional maintenance. GB 13955 - 1992 the measures the current equipment maintenance and operation rules is not touch the outdoor unit of electrical equipment, while the 2005 edition of the relevant provision clearly requires all outdoor lighting circuits should be set up leakage maintenance. As to the leakage switch maintenance measure current value left how much is appropriate, on the basis of oOHz the effect of the alternating current through the human body, thinking to the rain outside environment, with more than should not be greater than lOOmA measures current.

about urban landscape lighting system. Because the distribution line is longer, cross section is small, often lack of grounding fault current in order to make over current protection measures, combined with the lack of professional operation for maintenance, in setting the leakage source to maintain the most feasible. Leakage maintenance measures value not the optimal choice of value of additional measures current J. 。 0 N. Five times because the maintenance for all lines and lighting lamps and lanterns is common, so the maintenance of electrical leakage of electric current maintenance measures should be greater than the normal operation of lighting and lighting lamps and lanterns is 2 times the leakage current of all.

the leakage current of the cable is by the line resolution of distributed capacitance, single-phase cable leakage current according to 22 ma/km budget; Three-phase cable line in the power supply voltage balance and three relatively distributed capacitance flat under the condition of leakage current is close to zero, but in practice, the system voltage can't be completely balanced, each phase distributed capacitance also wood was flat, and there are asymmetric operation condition, so two-phase street lamp still think according to 22 ma/km.

it concretely introduces the street light for everyone in the use of wires, what should you pay attention to, about this knowledge is very necessary to understand clearly. It relates to the safety hidden trouble and a lot of ways, hope these will be helpful to you