The selection of smart energy saving lamps

The selection of smart energy saving lamps

First, the basic situation of street lamps
1. Lamp type: High pressure sodium lamp, rated power of lamps and lanterns 250W
2. Lighting layout: two sides of the road are arranged with 27 lights on each side
3, lamp step line: both sides are three-phase four-wire wiring

Second, the field data test voltage (V) stable operating current (A) power factor
A 231 54 0.82
B 228 58 0.79
C 229 56 0.81

Third, the Saver estimate selection of a single 250W high pressure sodium lamp, the starting current is close to 5A, the normal operating current is also about 3A, according to the normal operating current estimation, the above-mentioned 54 lamps, equivalent to each phase 18, that is, each phase is normal The operating current is about 54A. In the selection of the power saver, the current value can be selected according to the theoretical calculation, and at the same time, the starting current should be considered, and some margin should be appropriately put. This is conducive to extending the service life of the equipment, improving reliability, and avoiding the problem of insufficient capacity in the future. Therefore, in this case, ZNLD3-80 type (three-phase 80A) was selected to perform energy-saving engineering control of the street lamp.

IV. Installation and energy-saving rate setting After installing the energy-saving device, the energy-saving rate is divided into periods without affecting the illumination and stability. The upper-half-night electricity-saving rate is set at about 20%, and the second half of the night (starting at 12 o'clock in the evening). It is set at about 27%, so that the average energy-saving rate can reach 24%, and the contrast has no effect.