Take a look at these two devices
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Is this a motor with dual power supplies? Is it generally used on important feed pumps? Additionally, that bearing housing has two oiling points; one is oiled at a certain location, while there is only one oil cup. What’s the reason for this? I have a question,,
The two wires could be part of a star-delta starting circuit. Please check the control schematic
Generally, dual power supplies are installed in the distribution room or as part of the overall power supply system; they are not typically installed separately on individual devices
The extra wire isn’t for the fan of the variable-frequency motor; could it be for a space heater? ~~~~~The lubrication point of an oil-lubricated single suspension pump is the bearing housing (connecting the two bearings)
1. If a single cable is chosen with a relatively large cross-sectional area in the design, it will pose difficulties during construction. Therefore, by using two cables with a lower cross-sectional area in parallel, their current-carrying capacity is 10% higher than that of a single cable. 2. Although the use of a single cable in the design meets the current-carrying capacity requirements, the voltage loss during cable power transmission is greater than 5% (due to the long transmission distance), which does not meet the specified requirements. Therefore, by using two cables of a size one grade smaller in cross-sectional area in parallel, the current-carrying capacity is sufficient, and the voltage loss requirements are also met. 3. Although the use of a single cable in the design meets the current-carrying capacity requirements, the short-circuit current calculation for cable power transmission does not meet the specified standards. Therefore, by using two cables with a lower cross-sectional area connected in parallel, their current-carrying capacity will meet the requirements, and the short-circuit current checks will also be satisfied
This is related to starting, right? Star-delta starting is used, and dual-power supply is generally implemented through electrical means
The one above is a breathing cap; generally, fuel is added from a constant-level fuel reservoir. The positions of the two breathing caps above are likely observation holes for the oil slinger, used to check whether the oil slinger is rotating
Take a look at the electrical diagram; it seems to be a star-delta starting wiring scheme；