Safety standards for fan coil units of spiral duct manufacturers
At present, more and more customers on the market are just beginning to attach great importance to the hidden dangers of the application of air disc machines and equipment. 1 The safety regulations of the pressurized air plate of the ventilation duct shall meet the requirements of ZBJ72-018. 2. The connection of the electrical equipment route of the wind panel should be neat and sturdy, and the cables should pass through the buried holes and connect the power plugs with insulating pipes or other appropriate safeguards. 3. Under the standard of normal temperature and normal humidity, the air pan shall be used to measure the grounding resistance between the induction electrification part of the air disc and the non-inductive electrification metal material with a 500V grounding resistance meter, and the condensed water experiment working conditions required by Table 6 shall be continuously operated. After 4 hours, use a 500V grounding resistance meter to measure the grounding resistance between the induction electrification part of the wind disk, the non-inductive electrification part and the non-induction electrification metal material part. 4. When the compressive strength of the electrical equipment of the wind disk is placed at the 'connection' position according to the speed ratio of the wind disk, the rectangular ventilation duct is in the middle of the induction electrification part and the non-induction electrification metal material part. Alternating current. The working voltage should not exceed half of the standard value at the beginning of the release, and then quickly rise to the full value for 1min. In mass production, it can be replaced by 1800V working voltage and 1s time. 5. According to the specified working conditions of the condensate water experiment, the air plate shall be continuously operated for 4 hours, and the temperature of the motor winding shall be measured by the resistor method immediately. The temperature rise is calculated according to the requirements of GBA755. 6. The air pan shall continue to operate for 4 hours according to the specified condensate water experimental working conditions and the wiring in Figure 5, and then 110% of the rated current in various aspects. The metal ventilation duct measures the leakage current between the part of the metal material exposed by the air pan and the power plug, which exposes the metal The leakage current value between a part of the material and the power plug should not exceed 1.5mA.