How to make a bypass for an uninterruptible power supply?
Good afternoon! The task is to make a bypass for the UPS (UPS). Found a circuit on the network (attached image). The diagram indicated the characteristics of its UPS and load.
The network is single-phase with grounding. Wire cross section 10 mm2.
Tell me please. I would like to know:
1) why on the diagram is automatic 3 and automatic 5 when there is a common differential. automatic machine (1);
2) in the place where the phase wire (L) diverges at point 2, you should use some kind of terminal block, or how to make the wiring;
3) for zero, you can make a common bus or you should pull it as a phase (just saw that some zero pass through a reversing automaton (4)).
Thank!
Loading...
Hello! Machine 3 is needed to disconnect the UPS from power when it is being serviced or in an emergency. 5 differential is needed to disconnect the load in case of emergency or maintenance. If you disconnect the general differential - UPS will give power to the line, etc.
The branching from the wire can be done in many ways, among them:
1. Terminal blocks;
2. Tires;
3. Sleeves;
4. Welding;
5. Soldering.
You can make a common bus, but there are doubts about this related to the fact that it is possible to combine network zero and zero from an uninterruptible power supply? Zero will become zero - after grounding the connection point of the star, but you do not have a star, and whether there will be a re-grounding of the PSU output, or IT will result. But is the circuit correct, according to it, the zero from the UPS output is connected to the network zero ?. I’m not sure, but I would do it as you write, through a reversing machine. For greater certainty - use the same switch as in the phase.