Corrosion resistant mortar pump what is the effect of a three-phase short

corrosion resistant mortar pumps are commonly used in industrial production, corrosion resistant mortar water pump simply choose three-phase 380 v motor operation, the use of three-phase short of a study of corrosion resistant mortar water pump work be affected?

1, corrosion resistant mortar pump, the cause of the three phase motor open phase

the cause of the three phase motor open phase induces generally can be divided into external three-phase motor and three-phase motor internal two kinds:

external reasons: in the case of the many repair is common in the motor terminal box wiring loose screws; Second is loose connection or oxidation of three-phase power supply circuit, such as some of the contactor contact contacts adverse may contact resistance is very big and constitutes the power the power phase; And the fuse of the fuse disconnect may not meet fastening, etc.

internal reasons: internal reasons generally rare, is generally three-phase motor lead wire fracture. Then we can measure the dc resistance of the three-phase winding, suppose you have a lot perhaps phase resistance to infinity, the winding is the opening phase. Assuming that fundamental balanced three-phase resistor, so you can wipe out the motor.

2, corrosion resistant mortar pump is short of a three-phase electric motor on

three phase motor open phase operation refers to the motor stator winding of the three-phase power supply is short of a phase. In the motor of a phase, it is assumed that at this time for motor powered by electricity, when the load heavy drag by the machine case, start it could not reach the speed of the rules, even won't start. This assumption to continue for a long time, electric opportunity due to long time of high current motor overheating, serious when smoke fire burned down.

3, corrosion resistant mortar pump motor operation when the lack of a phase

in the process of three-phase asynchronous motor operation assumes that all of a sudden lack of phase, so the speed of the motor will soon fall, this time also increases a lot of motor stator winding current.

so three phase motor open phase homework is harmful to motor is very large, we can choose some protection measures for three phase motor open phase protection when working. Such as can choose with phase failure protection and corrosion resistant mortar pump to open phase protection, thermal relay for stator windings into Y type we can choose the poles may thermal relay on the structure of the tertiary phase failure protection.

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