Low protection level: The dedicated valve motor provided by Denso is a fully enclosed squirrel cage structure, with short-time intermittent work (10min) self-cooling. According to the requirements of GB4942.1-85, the low protection level is IP44 and the protection level is IP68. Valve] Different operating conditions and environments require different levels of protection. Low level of protection will cause the motor cavity to get damp or foreign objects such as dust will invade the motor insulation resistance value and cause damage.

Improper packaging, transportation and storage: The valve electrical packaging should be protected from rain, moisture, and dust, and the packaging should be firm and reliable. Rainproof measures should be taken during transportation, and products should be stored in a ventilated and dry place after they arrive on site. Store them in the open air. It is forbidden to debug or overhaul in rainy weather. Tighten all fasteners after debugging to ensure tight and reliable sealing of all electrical parts.

The electrical protection fails. The quality of electrical components is poor: the micro switch in the valve electrical equipment is a key component of the control mechanism. When the valve exceeds the stroke position, the micro switch cuts off the power supply to act as overload protection. Most electrical equipment manufacturers connect the stroke and torque protection in series. When over-travel or over-torque, the micro switch cuts off the AC contactor coil control power supply in time to cut off the main circuit of the motor.