There are two connection methods for the wiring diagram of three three-phase 380V heating tubes:

There are two connection methods for the wiring diagram of three three-phase 380V heating tubes:

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The following are two wiring methods for heating tubes.

There are two connection methods for the wiring diagram of three three-phase 380V heating tubes:

One method: This is the same as the connection method for the motor, with three pipes and six wiring terminals. First, string one end of the three pipes together, which is the two ends, and then connect each of the three live wires to an electric heating pipe, which is the one end, and it is OK.

There are two types: the electric heating tubes are W, U, V, with 1 as the first and 2 as the last. Connect them according to the connection method shown in the diagram, and then connect the three live wires to 1, and it is OK.

The wiring method for the two terminals of a 380V heating rod: The two terminals of a 380V heating rod should be connected to a live wire after passing through a switch. When wiring, it is necessary to first make a wire nose (round sleeve), then add a flat pad and spring pad, tighten the screws, and finally put on a heat-resistant stone wool sleeve and fix it.

380V electric heating tube wiring method: The heating tubes are mostly connected in a star shape, and the multiple connection method is to connect one end of three sets of heating tubes together to zero.

The wiring method for the 380V heating rod is to directly connect two live wires to the heating rod. If the number of heating rods is exactly a multiple of 3, distribute them evenly among the three-phase power supply to ensure that the load of the three-phase power supply is as balanced as possible. For example, this heating rod is connected to two phases A and B, the next one is connected to two phases B and C, and the next one is connected to two phases A. And so on. This way, the load of the three-phase power supply is more balanced.

The current calculation formula for 380V heating rod star connection method: After star connection, due to the presence of a neutral wire, the current calculation is very simple. The voltage of each phase is 380/√ 3=220V

IR=2X10000/220=91A, IS=IT=45.5

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