The explosion-proof grade of the motor consists of three parts:<\/p>\n
The classification of temperature groups for igniting a certain medium mainly includes T1-450\u2103 < T, T2-300 \u2103 < T\u2264 450\u2103, T3-200 \u2103 < T\u2264300\u2103, T4-135 \u2103 < T\u2264200\u2103, T5-100 \u2103 < T\u2264135 \u2103, and T6-85 \u2103 < T\u2264100\u2103.<\/p>\n
The classification of explosive mixtures of gases or vapors is divided into three types: \u2161A, \u2161B, and \u2161 C. These grades are mainly differentiated based on the test safety gap (MESG) or the minimum ignition current (MICR).<\/p>\n
3. The classification of safety levels for the use of different electrical equipment in explosive gas zones (Zone 0, Zone 1, and Zone 2), such as the selection of explosion-proof motors, is divided into flameproof type (code d), positive pressure type (p), increased safety type (e), and n type.<\/p>\n
So, what causes the resistance of explosion-proof motors to be too low? How to solve it?<\/p>\n
It is possible that water has entered or the windings of the explosion-proof motor have become damp. Drying and heating treatment can be carried out to quickly dry the windings.<\/p>\n
2. Check if the dust and oil stains on the windings of the explosion-proof motor are covered. Generally, a small amount of dust and oil stains will not significantly affect the normal operation of the motor. You can clean the oil stains on the windings by impregnating them with oil-absorbing paper. If there is a lot of dust, you can use a dry brush to wipe it clean.<\/p>\n
3. If the winding board of the explosion-proof motor is damaged, or if the insulation of the lead-out wires ages or is damaged, the insulation of the lead-out wires needs to be rewrapped. If the damage is severe, the junction box and lead-out box need to be replaced or repaired to ensure the safe and stable operation of the motor wires.<\/p>\n
4. The insulation of the explosion-proof motor ages first. It is necessary to identify the degree of aging of the wires. If it can still be used, it needs to be cleaned thoroughly and repainted for treatment. If the aging of the insulating wires will affect the operation of the explosion-proof motor, new insulating wires need to be replaced.<\/p>\n","protected":false},"excerpt":{"rendered":"
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