User:LMischler/Img-2018-E

Fig. E1 – An example of a block of flats in which the main earthing terminal (6) provides the main equipotential connection; the removable link (7) allows an earth-electrode-resistance check (DB422160_EN)

Fig. E3 – TT System (DB422161_EN)

Fig. E4 – TN-C system (DB422162_EN)

Fig. E5 – TN-S system (DB422163)

Fig. E6 – TN-C-S system (DB422164_EN)

Fig. E7 – Connection of the PEN conductor in the TN-C system (DB422165_EN)

Fig. E8 – IT system (isolated neutral) (DB422166_EN)

Fig. E9 – Leakage impedance to earth in IT system (DB422167_EN)

Fig. E10 – Impedance equivalent to leakage impedances in an IT system (DB422168_EN)

Fig. E11 – IT system (impedance-earthed neutral) (DB422169_EN)

Fig. E12 – TT system (DB422170)

Fig. E13 – TT system (DB422171)

Fig. E14 – TT system (DB422172)

Fig. E15 – IT system (DB422173_EN)

Fig. E18 – TN-S island within an IT system (DB422175_EN)

Fig. E19 – IT islands within a TN-S system (DB422176_EN)

Fig. E20 – Conductor buried below the level of the foundations, i.e. not in the concrete (DB422177)

Fig. E21 – Earthing rods connected in parallel (DB422178)

Fig. E22 – Vertical plate - 2 mm thickness (Cu) (DB422179)

Fig. E25 – Earthing rods (DB422180)

Fig. E26 – Measurement of the resistance to the mass of earth of electrode (X) using an earth-electrode-testing ohmmeter

• 

  (DB422181a_EN)

• 

  (DB422181b)

Fig. E27 – A sub-distribution switchboard (Prisma Plus G) (PB116717)

Fig. E28 – [a] A main LV switchboard - MLVS - (Prisma Plus P) with incoming circuits in the form of busways - [b] A LV motor control centre - MCC - (Okken)

• 

  (PB116715)

• 

  (PB116716)

Fig. E29 – Final distribution switchboards [a] Prisma Plus G Pack; [b] Kaedra; [c] mini-Pragma

• 

  (PB116718)

• 

  (PB116719)

• 

  (PB116720)

Fig. E30 – Assembly of a final distribution switchboard with fixed functional units (Prisma Plus G) (PB116721)

Fig. E31 – Distribution switchboard with disconnectable functional units (PB116722)

Fig. E32 – Distribution switchboard with withdrawable functional units in drawers (PB116723)

Fig. E33 – Main actors and responsibilities, as defined by the IEC 61439-1&2 standard (DB422182_EN)

Fig. E36 – Representation of different forms of LV functional distribution switchboards (DB422183_EN)

Fig. E38 – Conductor identification on a circuit breaker with a phase and a neutral (DB422184_EN)

Fig. E39 – Radial distribution using cables in a hotel (DB422185_EN)

Fig. E40 – Busbar trunking system design for distribution of currents from 25 to 4000 A (DB422201_EN)

Fig. E41 – Radial distribution using busways (PB116725)

Fig. E42 – Example of a set of 14 x 25A loads distributed along 34 meters (for busway, Canalis KS 250A) (DB422186_EN)

Fig. E43 – Rigid busbar trunking able to support light fittings: Canalis KBA or KBB (25 and 40 A) (PB116726)

Fig. E44 – A busway for medium power distribution: Canalis KN (40 up to 160 A) (PB116727)

Fig. E45 – A busway for medium power distribution: Canalis KS (100 up to 1000 A) (PB116728)

Fig. E46 – A busway for high power distribution: Canalis KT (800 up to 5000 A) (PB116729)

Fig. E47 – Appearance of a distorted current waveform due to harmonics (DB422187_EN)

Fig. E48 – Line and neutral currents absorbed by single-phase non-linear loads connected between phase and neutral. (DB422188)

Fig. E49 – Examples of applications where the level of harmonics (THD) is either negligible or high, depending on the proportion of loads generating harmonics versus classical loads

• 

  (PB116730)

• 

  (PB116731)

Fig. E50 – Typical harmonic phase current spectrum for single-phase non-linear loads (DB422189_EN)

Fig. E51 – Line current for different ratios of non-linear load (DB422191_EN)

Fig. E52 – Neutral conductor load factor as a function of the 3rd harmonic level. (DB422192_EN)

Fig. E53 – Double-neutral installation for cable solution is not directly applicable for busway solution, due to their very different thermal dissipation behaviour. (DB422193)

Fig. E54 – Illustration of the overheating risk with standard busway sizing in presence of high level of 3rd harmonics (DB422194_EN)

Fig. E55 – Cross section architecture of 2 different busbar systems. (DB422195_EN)

Fig. E56 – The most effective solution = reduce the current density in ALL conductors, by selecting proper busway rating (single-neutral) (DB422196)

Fig. E57 – Cross sectional view of a standard busway without and with harmonics (DB422197_EN)

Fig. E58 – Comparison between double-neutral busway solution and properly selected single-neutral solution

• 

  (DB422198a_EN)

• 

  (DB422198b)

Fig. E59 – Coherent system approach for all components of the electrical installation

• 

  (PB116184-30)

• 

  (PB116732)

Fig. E60 – Typical harmonic neutral current spectrum for single-phase non-linear loads (DB422190_EN)

Fig. N63 – IP Code arrangement (DB422199_EN)

Fig. N64 – Elements of the IP Code (DB422200_EN)