How to connect equipment with five wires to the TN-C system?
The facility is a plant with an existing TN-C system. Within the framework of the project, refrigeration chambers with a five-core lead-in cable are being introduced. To switch to the TN-C-S system, we install in the switchboard GZSH and a jumper with an existing PEN bus (which becomes an N-bus).
In this case, the designed network is grounded by the correct system. How to behave noun. 4-wire power receivers that continue to be connected to the N-bus? What are the options for resolving the issue on your part?
In this case, the designed network is grounded by the correct system. How to behave noun. 4-wire power receivers that continue to be connected to the N-bus? What are the options for resolving the issue on your part?
Hello, I came across such a situation, also at the factory. We connected plants with a “five-wire” power supply, either similar to what you are saying, or simply connected PEN to both the N and PE terminals of the equipment, depending on what kind of circuit there is. If PE is not involved in the internal wiring of the installation, then the second option is simpler. If it is necessary to ensure the operation of differential switches, then in any case, the zero is divided regardless of how and what will work (that is, your option). In general, you proposed the right, in my opinion, solution.
How to lead? They won’t lead in any way, you didn’t make changes in their chains, but let’s say so parallel to them.
How to lead? They won’t lead in any way, you didn’t make changes in their chains, but let’s say so parallel to them.
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