Experimental projects

Inspection site

Inspection content

Judgement

Standard

Structural inspection

The whole machine

1)The nameplate mark complies with the standards;

2)The structural dimensions comply with the drawings and standards;

3)Creepage distance and electrical clearance meet standards;

Qualified

GB3836.1-2010 GB3836.3-2010 relevant requirements

Introduction device clamping performance test

Introduction device

A tensile force of 680N is applied to a cable with a diameter of 34mm for 6h, and no displacement occurs.

Qualified

GB3636.1-2010  appendix A.3

Impact test

Shell

The housing bears the impact energy generated by the vertical fall of a test object with a mass of 1.0 kg from 0.7m, and there is no damage.

Qualified

GB3836.1-2010      article 26.4.2

Aging resistance test

Seal gasket/Cement/Joint glue sealing part

The samples are placed in an environment of humidity: 90% and temperature: 95°C for 14 days, and then placed in an environment of 126°C for 14 days; They are placed at room temperature for 24h, and then placed at -30°C for 1 day; After the test, there is no obvious change in the sealing ring, cement and where the joint is sealed.

Qualified

GB3836.1-2010

article 26.8、26.9    and appendix A.3

Shell protection experiment

The whole machine

Level 5 dustproof: the sample is placed in a dustproof box and the negative pressure of pumping is 2kpa, and after 2h, there is no dust accumulation in the product shell; Level 5 waterproof: At 3m away from the sample, the spray gun with a water consumption of 12.5L/min sprays water on the sample for 3min, and no water enters the product shell.

Qualified

GB4208-2008

Temperature experiment

Shell/At the joint/Glue sealing part

The maximum surface temperatures of the sample shell, joint and cable joint glue sealing part are 49.4 °C, 107.8 °C and 105.9 °C, respectively. Note: The cross-section area of the test cable is 240mm².

Qualified

GB3836.1-2010 article 26.5.1

Salt water resistance

The whole machine

The specimen is cut into three 20mm*20mm*20mm specimens and soaked in 3% sodium chloride solution. The temperature is maintained at 20±5 °C, and there is no swelling and no cracking after 3 days. The box keeps integral. There is no obvious change in the inner and outer surfaces, no breakage and peeling between layers.

Qualified

GB23864-2009        article 6.8

Acid resistance

The whole machine

The specimen is cut into three 20mm*20mm*20mm specimens and soaked in 3% hydrochloric acid solution. The temperature is maintained at 20±5 °C, and there is no swelling and no cracking after 3 days. The box keeps integral. There is no obvious change in the inner and outer surfaces, no breakage and peeling between layers.

Qualified

GB23864-2009 article 6.12