The problem is such, have the tripping operation of protector of leakage of electricity of an office building, the 0 lines that measure every floor next, ground wire and igneous space are measured have 230V, measure additionally with able to read aloud fluently of protector of leakage of electricity the voltage between 3 front line is 400V left and right sides, and measuring a 0 lines and ground wire with avometer is access. The reason that miscellaneous altar lives in to analyse this problem in the light of afore-mentioned circumstance below and settle way.
- We know the voltage of three-phase report is 380+-7% left and right sides, measuring a voltage between 3 front line so is 400V it is normal; That is to say the voltage of master switch does not have a problem, so the trouble that we can remove town report. Living in miscellaneous altar to analyse live wire again next is 230V to the voltage of 0 lines and ground wire, it is what reason: We should know single-phase phone front line is 220V+-5% to the voltage of 0 lines and ground wire, and the value that we measure actually is live wire it is 230V to the voltage of 0 lines and ground wire; So, will read line according to measuring numerical value is normal, cannot see the problem goes in where.
- The system of power supply ground connection of office building basically is TN-S system, want to answer this question, we must understand TN-S system first: TN-S system is a job 0 lines (N) with protection 0 lines (PE) the power supply system of strict departure, 0 lines are protected to do not have electric current when the system works, just work 0 lines have electricity; The job 0 lines are used at single-phase and laden loop commonly, can receive protector of leakage of electricity, but not iterative earth of be patient of, protect 0 lines not to allow a line to also do not allow to receive protector of leakage of electricity; That is to say from master switch later, the job 0 lines (N) with protection 0 lines (PE) be must part strictly, not be patient of connects, if connect,can appear the following circumstance: Loop has protector of leakage of electricity, so with respect to meeting tripping operation; Loop does not have protector of leakage of electricity, although can be used apparently, but exceedingly insecure, very incidental danger getting an electric shock; So, measure a master switch actually the following the place that 0 lines and ground wire are interlinked is a problem, in master switch the following 0 lines and ground wire are departure, do not allow to connect.
- Live in miscellaneous altar proposal to should begin to check from the room of tripping operation of protector of leakage of electricity, find the 0 lines in circuit and place of ground wire connective, 0 lines and ground wire departure, and do good insulation processing; Reoccupy is used shake express or the insulation circumstance that avometer will come to search circuit, will affirm to whether there is leakage of electricity in circuit.
Measure with live wire about 0 lines, ground wire have 230V, the issue that how handles lives in miscellaneous altar to be analysed to everybody, the hope can help great master, the place that if have inadequacy,above is individual viewpoint welcomes everybody to leave a message discuss! Still adjure everybody to pay close attention to household miscellaneous altar finally, reside miscellaneous altar to nod assist to comment on transmit to the home more, thank extremely!
