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Ability Declaration | Interpretation of ANSI C136.31-2023 Standard

Author.

LCS

Source:

Post time:

2024-08-21

Latest Standards | Interpretation of the National Standard for Road and Area Lighting Fixtures in the United States - Vibration NEMA ANSI C136.31-2023

1. Scope of testing:

This standard covers the minimum anti vibration capacity and vibration test methods for roadway lamps and area lamps, and is not applicable to natural disasters or catastrophic disasters.

The actual use of road area lighting is affected by external vibrations in two aspects:

a. Vibration caused by wind force.

b. Vibration caused by passing vehicles.

3 Testing methods:

3.1 Resonance frequency search

Frequency range (Hz): 2-30;

Acceleration (g): 0.2;

Sweep rate (oct/min): 1;

Test axis: X, Y, Z

Namely: Measure the resonance frequency of the lamp in three axes (X/Y/Z) within the frequency range of 2-30Hz with an acceleration of 0.2g and a scanning rate of 10ct/min, and conduct durability testing at the most severe frequency (resonance frequency).

3.2 Constant frequency durability test

Test frequency: resonance frequency measured in 3.1; If there is no resonance frequency, conduct at 30Hz;

Acceleration: Select from Table 1/Table 2, mostly 3g;

Test frequency: 100000 times

Test time T=N/60f N is the number of tests, f is the test frequency

For example, if the resonance frequency is measured to be 6.95Hz, then the testing time T=4 hours

4 Actual cases:

(The following picture shows the special fixture for street lamps, simulating the actual installation state)

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