기능

• General-purpose spiral casing with special consideration for passability.
• Spiral structure. The pump shape of spiral structure is lifted.
• The structure is excellent for the passage of foreign matter such as soil and sand mixed in the drainage.
• Draining structure. By sealing the clearance of the core wire, in the unlikely event that the cable sheath is torn or the tip of the cable is submerged in water, water flowing through the small clearance of the core wire prevents water from flooding into the motor.
• Motor protection device. If the motor windings are abnormally heated or overcurrent flows for any reason, the built-in motor protection device detects this and automatically shuts off the electrical circuit to protect the motor.