1.The control cabinet of RCDD series dry self-discharging electromagnetic iron eliminators burnt out in the process of production and use, mainly due to unreasonable internal components, wire diameter selection and overall layout of the control cabinet. 2.In order to reduce production costs and reduce configuration and protection measures, some manufacturers cannot give self-warning in case of emergency, and find it is too late until the fire. 3.There are some problems in the design of the overall cooling device of the control cabinet. Some of them don't have cooling fans, and some of them burn out after being used in the dust environment for a few months, which is useless. 4.When used in outdoor environment, no use of rain shield, no use of other protective measures, resulting in short circuit. 5. Very few customers fail to operate in accordance with the seller's operating instructions in the process of use, resulting in circuit short circuit or overload.