Wei Zi Tunnel Lighting

1. The lighting direction of the signal mechanism is consistent, the display distance conforms to the provisions of technical specifications, the equipment signs are clear and correct, and the paint of the mechanism does not fall off.

2. The equipment is free from external interference, and the foundation, mechanism and ladder are firmly installed.

3. The ladder is not bent, the bracket is horizontal, and the center line of the ladder is consistent with the center line of the machine column.

4. There should be no cracks running through the circumference of the cement column. More than half a week, reinforcement measures should be taken, and longitudinal cracked steel bars should not be exposed; No part shall invade or approach the clearance; The inclination of the machine column shall not exceed 36 mm, and the top of the machine column shall be waterproof. The inclination of the foundation shall not exceed10mm.

5. The box body, mechanism and snake tube are not damaged, the cotter pins are complete, the screws are tightened, and all parts are locked.

6. The hard surface should be clean and free of sundries.

7. The safety ground wire connector of electrochemical section has good contact.

Test:

1. The filament terminal voltage is 85%-95% of the rated value (10.2v-1.4v), and the shunt signal is 75%-95%(9V- 1 1.4V).

2. The secondary insulation resistance of the transformer to the ground shall not be less than 1Mω.