ZUCCHINI MR - MEDIUM RATING BUSBAR Available in sizes from 0 to 000 A, MR (medium rating) busbar is ideal for power distribution in medium to large installations and rising mains in commercial buildings. MR is available with aluminium or copper conductors and has a large range of tap-off boxes from to 000 A, allowing the supply and protection of a wide range of loads using devices such as fuses, MCBs and MCCBs.
Trunking lengths are available in single and double sided versions with aluminium or copper conductors Metal end feed unit (centre feed and switched end feed units are also available) Tap-off boxes are available pre-wired or empty with plugin or bolt-on options Joint covers guarantee mechanical rigidity and maintain IP protection SWITCHBOARD - TRANSFORMER FEED UNIT HORIZONTAL ELBOW VERTICAL ELBOW TAP-OFF BOXES Lowering lifetime installation costs MR features a monobloc electrical jointing system. The shearhead bolt on the monobloc allows for fast assembly of the run and guarantees long-term reliability and safety. As well as being quick to install, Zucchini MR busbar is easy to upgrade if existing installations need to be modified. The vast choice of elbows, tees and other accessories make any configuration possible, with bespoke solutions also available on request. 9
MR medium rating busbar medium power 0-000 A Tap-off box (see p. 9) 00 Suspension bracket (see p. ) 000 Tap-off box (see p. 9) 00 End feed unit (see p. 7) 000 Trunking length 0000 Tap-off box (see p. 9) 007 Dimensions and technical information p. Measuring bespoke dimensions p. 9 Technical data p. - IP (according to BS EN 09) Flame retardant in compliance with IEC 0-. Fully compliant with IEC EN 9- Rated currents are at an average ambient temperature of 0 C (over and above the required standard of C) : The 000 A aluminium is supplied painted as standard Key : How to select the correct configuration and finish All examples on this page show conductor galvanised lengths No. of conductors and finish is dictated by the red number 0 = conductors. Galvanised = conductors. Painted = conductors. Galvanised = conductors. Painted Replace 0 with,, or if required 0
MR medium rating busbar medium power 0-000 A Tap-off box (see p. 9) 00 Suspension bracket (see p. ) 000 Tap-off box (see p. 9) 00 End feed unit (see p. 7) 000 Trunking length 0000 Tap-off box (see p. 9) 007 Dimensions and technical information p. - Measuring bespoke dimensions p. 9 Technical data p. - IP (according to BS EN 09) Flame retardant in compliance with IEC 0-. Fully compliant with IEC EN 9- Rated currents are at an average ambient temperature of 0 C (over and above the required standard of C) : The 000 A aluminium is supplied painted as standard Key : How to select the correct configuration and finish All examples on this page show conductor galvanised lengths No. of conductors and finish is dictated by the red number 0 = conductors. Galvanised = conductors. Painted = conductors. Galvanised = conductors. Painted Replace 0 with,, or if required
MR medium rating busbar single elbows Horizontal elbow right hand Vertical elbow left hand Horizontal elbow left hand Vertical elbow right hand Dimensions and technical information p. Measuring bespoke dimensions p. 9 : The 000 A aluminium is supplied painted as standard Codes table Key : How to select the correct configuration and finish Conductors Case Code All examples on this page Codes show table MR conductor galvanised Galvanized - - lengths - 0 - - - - No. Conductors of conductors Case and Code finish is dictated MRF by the Galvanized red number - - - - - - - MR0 = conductors. Galvanized - - - Galvanised 0 - - - - MR-P = conductors. Painted - - - Painted - - - - MRF = conductors. Galvanized - - - Galvanised - - - - MRF-P = conductors. Painted - - - Painted - - - - MR-P Replace 0 Painted with,, - or - - - - if - required - MRF-P Painted - - - - - - -
MR medium rating busbar double elbows Vertical elbow left + right hand Horizontal elbow right + left hand Horizontal elbow left + right hand Vertical elbow right + left hand Dimensions and technical information p. Measuring bespoke dimensions p. 9 : The 000 A aluminium is supplied painted as standard Codes table Key : How to select the correct configuration and finish Conductors Case Code All examples on this page Codes show table MR conductor galvanised Galvanized - - lengths - 0 - - - - No. Conductors of conductors Case and Code finish is dictated MRF by the Galvanized red number - - - - - - - MR0 = conductors. Galvanized - - - Galvanised 0 - - - - MR-P = conductors. Painted - - - Painted - - - - MRF = conductors. Galvanized - - - Galvanised - - - - MRF-P = conductors. Painted - - - Painted - - - - MR-P Replace 0 Painted with,, - or - - - - if - required - MRF-P Painted - - - - - - -
MR medium rating busbar combination vertical + horizontal elbows Combination vertical + horizontal elbow right + right hand Combination vertical + horizontal elbow right + left hand Combination vertical + horizontal elbow left + right hand Combination vertical + horizontal elbow left + left hand Dimensions and technical information p. Measuring bespoke dimensions p. 9 : The 000 A aluminium is supplied painted as standard Key : How to select the correct configuration and finish Conductors Case Code All examples on this page show conductor Codes tablemr Galvanized - -lengths - 0--- galvanised No. of conductors andcode finish is dictated by the red number Conductors Case MRF --- --- Galvanized Codes table MR0 = Galvanized - - -Galvanised conductors. = conductors. 0--- Painted - - -Painted --- MR-P - - -Painted --- MRF Galvanized - - -Galvanised --- Painted MRF-P = conductors. = conductors. - - - -if- required MR-P Replace0 Painted with,,- or --- --- MRF-P Painted
MR medium rating busbar combination horizontal + vertical elbows Combination horizontal + vertical elbows right + right hand Combination horizontal + vertical elbows right + left hand Combination horizontal + vertical elbows left + right hand Combination horizontal + vertical elbows left + left hand Dimensions and technical information p. Measuring bespoke dimensions p. 9 : The 000 A aluminium is supplied painted as standard Key : How to select the correct configuration and finish Conductors Case Code All examples on this page show conductor Codes tablemr Galvanized - -lengths - 0--- galvanised No. of conductors andcode finish is dictated by the red number Conductors Case MRF --- --- Galvanized Codes table MR0 = Galvanized - - -Galvanised conductors. = conductors. 0--- Painted - - -Painted --- MR-P - - -Painted --- MRF Galvanized - - -Galvanised --- Painted MRF-P = conductors. = conductors. - - - -if- required MR-P Replace0 Painted with,,- or --- --- MRF-P Painted
MR medium rating busbar horizontal tees and crossovers Horizontal tee left hand male Horizontal tee right hand female Horizontal tee right hand male Dimensions and technical information p. Measuring bespoke dimensions p. 9 Key : How to select the correct configuration and finish Conductors Case Code All examples on this page show conductor Codes tablemr Galvanized - -lengths - 0--- galvanised Conductors Case No. of conductors andcode finish is dictated by the red number MRF --- --- Galvanized Codes table MR0 = Galvanized - - -Galvanised 0--- Painted - - -Painted --- MR-P conductors. = conductors. - - -Painted --- MRF Galvanized - - -Galvanised --- Painted MRF-P = conductors. = conductors. - - - -if- required MR-P Replace0 Painted with,,- or --- --- MRF-P Painted Horizontal tee left hand female Crossover
MR medium rating busbar feed units Feed unit left end Feed unit right end Dimensions and technical information p. Measuring bespoke dimensions p. 9 Right end up feed unit with AC switch disconnector End stop Codes table Key : How to select the correct configuration and finish Conductors Case Code All examples on this page Codes show table MR conductor galvanised Galvanized - - lengths - 0 - - - - No. Conductors of conductors Case and Code finish is dictated MRF by the Galvanized red number - - - - - - - MR0 = conductors. Galvanized - - - Galvanised 0 - - - - MR-P = conductors. Painted - - - Painted - - - - MRF = conductors. Galvanized - - - Galvanised - - - - MRF-P = conductors. Painted - - - Painted - - - - MR-P Replace 0 Painted with,, - or - - - - if - required - MRF-P Painted - - - - - - - 7
MR medium rating busbar feed units (continued), in-line bus switcher and reducers I n-line bus switch left hand Switchboardtransformer feed units Centre feed unit Switchboardtransformer feed units I n-line bus switch right hand Dimensions and technical information p. - Key : How to select the correct configuration and finish Conductors Case Code All examples on this page show conductor Codes tablemr Galvanized - -lengths - 0--- galvanised No. of conductors andcode finish is dictated by the red number Conductors Case MRF --- --- Galvanized Codes table MR0 = Galvanized - - -Galvanised conductors. = conductors. 0--- Painted - - -Painted --- MR-P - - -Painted --- MRF Galvanized - - -Galvanised --- Painted MRF-P = conductors. = conductors. - - - -if- required MR-P Replace0 Painted with,,- or --- --- MRF-P Painted 8 Rating reducers with disconnector and fuse holder also available Contact us on + (0) 70 08 900
MR tap-off boxes : plug-in type up to A A plug-in tap-offs Empty Energy withstand 00 0 A s Type Max. power losses W Type Max. power losses 0 W Complete with x CH0 fuse holders Transparent hinged door and mod. DIN rail With 8 mod. DIN rail Transparent hinged door and 8 mod. DIN rail With mod. DIN rail Transparent hinged door and mod. DIN rail 00 7 00 7 00 00 7 007 9 007 0 A plug-in tap-offs fitted complete with TYPE B MCBs Energy withstand 00 0 A s Type Max. power losses W Rating x P x (P + N) P Transparent hinged door and mod. DIN rail A 00 9 A plug-in tap-offs fitted complete with TYPE C MCBs Energy withstand 00 0 A s Type Max. power losses W Rating x P P Ready for MCB Transparent hinged door and mod. DIN rail A A 08 9 0 Type Max. power losses 0 W Transparent hinged door and 8 mod. DIN rail. Plus x A P socket A 09 0 Transparent hinged door and 8 mod. DIN rail. Plus x A P sockets A 08 08 9 Transparent hinged door and 8 mod. DIN rail. Plus x A P sockets A 09 9 Transparent hinged door and 8 mod. DIN rail. Plus x A P + E sockets A 08 0 08 For dimensions, technical information and mounting instructions see p. 7-8 9
MR tap-off boxes : plug-in type -0 A MR tap-off boxes from 0 to 000 A can accomodate different protection devices, including fuses, MCBs or MCCBs. Can be operated when energised and under load conditions up to a rating of A due to the integration of an isolating device within the cover. All insulating plastic components comply with the incandescent wire test (EN 09--) and have a V self extinguishing degree (UL9). Standard degree of protection is IP without using additional protection kits. For dimensions, technical information and mounting instructions see p. 7-8 Plug-in tap-offs with fuse carriers (or empty) -00 A TYPE TYPE TYPE Rating A A 00 A Fuse Carrier CH0 (Ø0 x 8) TIA / TIS TCP Empty NH 0 0 00 00 00 0 8 9 00 A (Neutral section 0%) 0 A 0 A NH 00 NH 0 NH Empty NH 00 007 0000 07 09 08 9 8 A Plug-in tap-offs fitted with DIN rail and transparent hinged window -00 A TYPE TYPE Can fit some MCCBs Rating A A 0 A 00 A Not suitable for MCCBs mod. DIN rail 8 mod. DIN rail mod. DIN rail 0088 7 mod. DIN rail + mod. DIN rail 8 mod. DIN rail 008 0077 00 008 0 000 0070 007 Plug-in heavy duty metal tap-offs -0 A TYPE These PE + FE tap-off boxes have separate terminals for the two parallel earths (casing and conductor) PE = protection earth FE = functional earth TYPE 7 0A TYPE 8 0A 0A A - A - 0A Empty version With fuse holder Rating A A 0 A 0 A 000 000 000 000 000 8 80 00 NH 00 8 90 00 NH 00 9 0 00 NH 00A -00 0A 0 NH 00 9 70 0 NH 0 9 70 0 NH 0 0 NH 8 8 0 00 CH (Ø x 8) 8 7 With switch disconnector and fuseholder (AC) 00 NH 00 9 0 8 80 00A - 0A For dimensions, technical information and mounting instructions see p. 7-8 0 00 A - 0A A - A NH 0 A A - A 00 NH 00A - 0A 0 NH 8
MR tap-off boxes : plug-in type -0 A - fully equipped bolt-on type 0-000 A Plug-in type Fully equipped tap-offs toggle handle MCCBs : - A Tap-off rating A Breaker rating pole MCCB with toggle handle pole MCCB with toggle handle A 0077MTF 0077MTF A 0077MTA 0077MTA 0 A 0077MTB 0077MTB A 0077MTC 0077MTC 00 A 0077MTD 0077MTD A 0077MTE 0077MTE MCCBs, R type and J type fuse carriers that meet EDF regulations are also available Contact us on + (0) 70 08 900 Tap-off boxes can be supplied with Castel locks Contact us on + (0) 70 08 900 Fully equipped tap-offs rotary handle MCCBs : -0 A Tap-off rating 0 A 0 A 0 A Breaker rating pole MCCB with rotary handle pole MCCB with rotary handle With free issue MCCB A 000MRA 000MRA 000MFA 0 A 000MRB 000MRB 000MFB A 000MRC 000MRC 000MFC 00 A 000MRD 000MRD 000MFD A 000MRE 000MRE 000MFE 0 A 000MRF 000MRF 000MFF 00 A 000MRG 000MRG 000MFG 0 A 000MRH 000MRH 000MFH 00 A 000MRI 000MRI 000MFI 0 A 000MRJ 000MRJ 000MFJ Fully equipped tap-offs with protection and multifunction meters : -0 A Tap-off rating 0 A Breaker rating : For MCCB technical data, see p. 8- Bolt-on type pole MCCB with multifunction meter Fusible tap-off with multifunction meter A 000MMC 00FMC 00 A 000MMD 00FMD A 000MME 00FME 0 A 000MMF 00FMF Bolt-on tap-offs with switch disconnector and fuse holder (AC) Positioned in the joint between straight lengths As this connection affects live conductors, it cannot be carried out when the line is live the line must be isolated Busbar system Aluminium Copper Busbar rating 0 A 800 A 000 A 0 A 800 A 000 A 0 A NH TYPE 9 0080 9 0080 9 0080 9 080 9 080 9 080 9 Tap-off size 800 A NH TYPE 0 0080 89 0080 89 080 89 080 89 000 A NH TYPE 0 0080 89 080 89 For dimensions, technical information and mounting instructions see p. 7-8
MR medium rating busbar fixing accessories 000 + 00 007 0 00 + 0 007 00 + 00 Dimensions and technical information p. 9 Measuring special dimensions p. 9 The MR series offers a wide range of brackets and fixing accessories that enable quick and simple installation for a wide range of applications. The MR series can be mounted on horizontal or vertical surfaces or mounted directly on to beams. Various spacers, spring suspension hangers and adjustable arms are available to meet the requirements of complex installations
n Tap-off outlet cover IP n Trunking lengths 0 to 999 mm with + outlets 7 9 0 7 7 0 00 00-000 A Al 0-000 A Cu 90 0- A Al 0-00 A Cu IP 0 00 0- A Al 0-00 A Cu : only on conductor 0 A 999 0 L (PE) L N L pe 0 9 9 7 00-000 A Al 0-000 A Cu n Trunking lengths m with outlets on one side only 00 00 00 7 n Trunking lengths 000 to 00 mm with + outlets 00 7 All dimensions (mm) are nominal
MR medium rating busbar technical information (continued) n Double elbows Standard dimensions (00 + 00 + 00 mm) 90 as standard. Other angles available on request. IP quick connection 9 0 n Trunking lengths 00 to 00 mm without outlets Bespoke dimensions Measure from the long casing to the axis of the elbow 0 Double horizontal elbow Right + left Left + right 7 90 00 A 00 (C) (A) (C) (B) (A) 0 0- A Al 0-00 A Cu 00-000 A Al 0-000 A Cu Bespoke dimensions (mm) Min 0 Double vertical elbow Right + left 8 Max 900 Left + right 00 (B) n Trunking lengths with S0 fire barrier A, B, C 0- A Al 0-00 A Cu 00-000 A Al 0-000 A Cu A 00 0 Bespoke dimensions (mm) Min 00 n Single elbows standard dimensions (00 + 00 mm) A, B, C Max 900 Vertical + horizontal elbows RH + RH RH + LH (A) (B) 90 as standard. Other angles available on request. IP quick connection Horizontal elbow RH LH 00 00 LH + RH LH + LH (C) Vertical elbow RH LH 00 00 Bespoke dimensions (mm) Min 00 Max 900 Horizontal + vertical elbows RH + RH RH + LH LH + RH LH + LH (A) (B) Bespoke dimensions Measure from the long casing to the axis of the elbow (see measuring bespoke dimensions p. 9) A, B, C Special horizontal elbow A B Bespoke dimensions (mm) Min Max 0 A 900 0 B 900 Special vertical elbow A B Bespoke dimensions (mm) Min All dimensions (mm) are nominal Max 00 A 900 00 B 900 Bespoke dimensions (mm) Min 00 A, B, C Max 900 (C)
n Horizontal tee n Metal end feed units Standard dimensions (00 + 00 + 00 mm) 00 80 00 0 Left hand male tee Left hand female tee RH Bespoke dimensions LH n End feed unit with AC switch disconnector (B) Dimensions (mm) (C) B (A) 0 90 90 0 80 0 00 9 Right hand female tee 00 During shipment the stump is positioned in the box to reduce its bulk Take it out and screw it in the position illustrated here Opening on the base cable entry : 80 x 90 mm. For plates and holes dimensions, see p. for the switchboard feed unit with the same rating Right hand male tee Bespoke dimensions (mm) Min A, B, C A 900 D C 0 0 Max n Crossover standard dimensions (00 + 00 + 00 + 00 mm) A 0 00 B 0 0 C 80 00 D 800 00 Cable entry dimensions (mm) 80 x 70 0 x 80 00 00 00 RH down LH up LH down 00 RH up n End feed units Cable connection : max. sect. ( x 0 mm + x 70 mm) or x 0 mm, max PG 8 00 00 0 0 00 0 0 RH 00 90 00 n Centre feed units 0 0 00 LH Cable entry All dimensions (mm) are nominal
MR medium rating busbar technical information (continued) n End stop Ensures IP protection at the end of the run (EN 09) 7 n In-line bus switch D A 0 n Switchboard-transformer feed units 0 RH 0 0 B C LH RH LH 0 Dimensions (mm) Type Type 80 0 0 Ø9 7 Type Type Ø 0 0 0 0 90 Ø 0 A 00 0 B 0 80 C 00 00 D 0 Dimensions (mm) Al Cu Type 0 A 0 A 0 A A A 00 A Type 00 A 0 A 00 A 800 A 0 A 000 A 800 A 000 A All dimensions (mm) are nominal
n Tap-off boxes Type Type 7 0 A 0 00 Type -0 A 8 00 0 9 0 Type 9 0 Type A 0 00 Type -0 A 00 00 0 0 Type 8 00-0 A 8 70 0 Type 9 0 A 80 70 00 Type 0 800-000 A 00 00 0 Type 0-00 A 00 0 All dimensions (mm) are nominal 7
MR medium rating busbar mounting tap-offs n Trunking length with outlets Rising main Edgeways 7 8 9 7 8 0 7 8 7 8 7 8 Numbers in squares refer to the tap-off box type 7 8 9 9 0 Rising main n Trunking length with outlets Edgeways 9 0 Numbers in squares refer to the tap-off box type non-usable non-usable 9 9 0 Note : in lengths with outlets, using an outlet excludes the use of the next one 8
MR medium rating busbar technical information n Suspension brackets n Beam fixing bracket 0 7 7 0 08 0 8 0 0 8 x Ø7 0 7 B C 0 A C AB A 000 B 000 C 00 n Measuring bespoke dimensions Straight lengths Always measure from the long side of the casing as illustrated n Wall fixing bracket x 0 00 0 70 0 / 0 / 70 L x 7 0 n Ceiling fixing bracket kit 0 98 0 00 0 98 Asole x Elbows Measure from the long casing to the axis of the elbow 0 Ø8 00 A A B B B B Ø 00 / 000 / 000 7 A A All dimensions (mm) are nominal 9
MR medium rating busbar how to design the system Use end feed unit LH left hand This gives the neutral bar positioning on the right of elements and the tap-off box with cable entry at the base Use the vertical hanger for rising main as a function of the run weight For vertical lengths less than metres fit on the base of the busbar a vertical bracket (Cat. No. 007) for longer lengths use vertical suspension hanger (Cat. No. 007) every 00 kg of rising main L PE L N L 7 Use standard suspension brackets with spacer 0 mm every m of the rising main 8 Use straight lengths with plug outlets on one side 8 Use the straight length with fire barrier to maintain the fire resistance of the floor Please specify the position of the internal fire barrier before placing an order (see p. ) 8 The tap-off box can be installed on the joint between the elements or on the outlets 8 7 At the end of the rising main use the end cover IP Before mounting the end cover remove the monobloc prefitted on the last element of rising main 8 Maintain the plug outlet covers to guarantee the degree of protection IP to the run 0
MR medium rating busbar how to create codes for SB/MR adaptors 0 00 00 0 MR 0 00 SB 90 L PE L N L Left hand Right hand SB L PE L N L 0 0 0 Conductors 0 Aluminium Copper Case 0 Galvanised Full galvanised Painted Full painted Type Right Left Rating 0 A 0 A A 00 A 0 A 800 A 7 000 A 8 00 A Example code 000 means Aluminium Galvanised Type RH 800 A 0 means Copper Full galvanised Type LH 0 A NOTE SB is a previous range of Zucchini medium rating busbar
MR medium rating busbar conductor (aluminium) technical data Complies to : IEC EN 9- DIN VDE 00 part 00 and 0 Suitable for the following climates : Constant humid climate (DIN IEC 8 and ) Cyclical humid climate (DIN IEC 8 and 0) L+N+PE (Aluminium) Rated current Operational voltage Insulation voltage Frequency Rated shortcircuit current withstand for -phase fault ( s) Specific Energy withstand for -phase fault Peak current Rated short-time current for single-phase fault Ph-N( s) Peak current for single-phase fault Ph-N Rated short-time current single-phase fault Ph-PE ( s) Peak current single-phase fault Ph-PE Phase resistance at 0 C Phase resistance at thermal conditions (I n ; 0 C) Phase reactance (0 Hz) Neutral resistance at 0 C Neutral reactance (0 Hz) Resistance of the protective bar Reactance of the protective bar (0 Hz) Resistance of the phase-pe fault loop Reactance of the phase-pe fault loop (0 Hz) Resistance of the phase-neutral fault loop Reactance of the phase-neutral fault loop (0 Hz) Voltage k drop coeff. with Voltage k drop coeff. with distribuited load (k) distributed load (k) Losses for the Joule effect at nominal current Fire load Overall dimensions of the busbar Degree of protection (CEI EN09) IK code CEI EN008-- In (A) Ue (V) Ui (V) ƒ (Hz) Icw (ka)rms I t (M A s) Ipk (ka) Icw (ka)rms Ipk (ka) Icw (ka)rms Ipk (ka) R0 (mω/m) Rt (mω/m) X (mω/m) Rn0 (mω/m) Xn (mω/m) RPE (mω/m) XPE (mω/m) RPh-Pe fault loop (mω/m) XRPh-Pe fault loop (mω/m) RPh-N fault loop (mω/m) XRPh-N fault loop (mω/m) v (V/m/A)0 - cosϕ = 0 70 v (V/m/A)0 - cosϕ = 0 7 v (V/m/A)0 - cosϕ = 0 80 v (V/m/A)0 - cosϕ = 0 8 v (V/m/A)0 - cosϕ = 0 90 v (V/m/A)0 - cosϕ = 0 9 v (V/m/A)0 - cosϕ = 00 P (W/m) (kwh/m) (kg/m) L x H (mm) IP IK 0 0 00 00 0 800 000 000 000 000 000 000 000 000 90 000 000 000 000 000 000 000 90 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0 0 900 9 9 900 0 7 7 9 8 8 0 0 0 9 8 8 0 0 0 0 9 0 8 0 97 0 0 0 077 0 00 0 0 0 07 0 0 0 0 0 0 0 08 0 070 0 07 0 0 0 0 0 8 0 0 0 0 0 097 0 09 0 07 0 9 0 8 0 97 0 0 0 077 0 00 0 0 0 07 0 0 0 0 0 8 0 0 0 0 0 097 0 09 0 07 0 0 0 0 8 0 8 0 8 0 8 0 8 0 0 0 0 0 0 0 80 0 80 0 80 0 80 0 80 00 0 78 0 07 0 0 87 0 0 0 0 80 0 0 9 0 0 0 8 0 7 0 7 7 0 77 0 0 8 0 8 0 0 0 09 0 80 0 0 0 0 0 0 90 0 77 0 7 0 8 9 7 79 09 0 90 8 0 79 80 0 08 00 88 9 8 80 9 07 98 8 08 8 8 79 7 0 9 8 77 7 00 9 77 7 9 9 9 9 8 9 7 8 0 90 70 0 8 79 78 78 97 0 8 8 8 8 8 7 7 7 8 0 7 8 7 9 7 x 9 7 x 9 7 x 9 x 9 x 9 x 9 x 9 x 9 - - - - - - - - 0 0 0 0 0 0 0 0 : Values for 0 s Temperature rating schedule Mean room temperature ( C) 0 0 0 0 0 K factor 08 0 0 0 97 0 9 0 9 0 89 Multiplier coefficient of nominal rating for room temperature values different from 0 C
MR medium rating busbar conductor (copper) technical data Complies to : IEC EN 9- DIN VDE 00 part 00 and 0 Suitable for the following climates : Constant humid climate (DIN IEC 8 and ) Cyclical humid climate (DIN IEC 8 and 0) L+N+PE (Copper) Rated current Operational voltage Insulation voltage Frequency Rated shortcircuit current withstand for -phase fault ( s) Specific Energy withstand for -phase fault Peak current Rated short-time current for single-phase fault Ph-N( s) Peak current for single-phase fault Ph-N Rated short-time current single-phase fault Ph-PE ( s) Peak current single-phase fault Ph-PE Phase resistance at 0 C Phase resistance at thermal conditions (I n ; 0 C) Phase reactance (0 Hz) Neutral resistance at 0 C Neutral reactance (0 Hz) Resistance of the protective bar Reactance of the protective bar (0 Hz) Resistance of the phase-pe fault loop Reactance of the phase-pe fault loop (0 Hz) Resistance of the phase-neutral fault loop Reactance of the phase-neutral fault loop (0 Hz) Voltage k drop coeff. with distribuited Voltage k drop load (k) coeff. with distributed load (k) Losses for the Joule effect at nominal current Fire load Overall dimensions of the busbar Degree of protection (CEI EN09) IK code CEI EN008-- In (A) Ue (V) Ui (V) ƒ (Hz) Icw (ka)rms I t (M A s) Ipk (ka) Icw (ka)rms Ipk (ka) Icw (ka)rms Ipk (ka) R0 (mω/m) Rt (mω/m) X (mω/m) Rn0 (mω/m) Xn (mω/m) RPE (mω/m) XPE (mω/m) RPh-Pe fault loop (mω/m) XRPh-Pe fault loop (mω/m) RPh-N fault loop (mω/m) XRPh-N fault loop (mω/m) v (V/m/A)0 - cosϕ = 0 70 v (V/m/A)0 - cosϕ = 0 7 v (V/m/A)0 - cosϕ = 0 80 v (V/m/A)0 - cosϕ = 0 8 v (V/m/A)0 - cosϕ = 0 90 v (V/m/A)0 - cosϕ = 0 9 v (V/m/A)0 - cosϕ = 00 P (W/m) (kwh/m) (kg/m) L x H (mm) IP IK 0 00 0 800 000 000 000 000 000 000 000 000 000 000 000 000 000 0/0 0/0 0/0 0/0 0/0 0/0 0 90 9 9 9 7 7 7 8 0 0 8 0 0 0 7 0 80 0 09 0 0 0 00 0 0 0 0 0 0 9 0 08 0 0 0 0 0 0 0 88 0 9 0 0 0 0 0 7 0 80 0 09 0 0 0 00 0 0 0 0 0 88 0 9 0 0 0 0 0 0 0 0 79 0 79 0 79 0 0 0 0 0 0 0 80 0 80 0 80 0 7 0 79 0 0 0 0 0 0 08 0 9 0 0 0 0 0 00 0 8 0 0 0 0 09 0 07 0 0 08 0 9 0 0 0 0 0 00 8 08 00 8 0 9 9 7 0 00 9 9 9 8 7 0 9 0 88 79 9 0 77 8 77 0 7 7 0 7 98 0 8 8 8 8 9 0 8 9 7 9 7 x 9 7 x 9 x 9 x 9 x 9 x 9 - - - - - - 0 0 0 0 0 0 : Values for 0 s Temperature rating schedule Mean room temperature ( C) 0 0 0 0 0 K factor 08 0 0 0 97 0 9 0 9 0 89 Multiplier coefficient of nominal rating for room temperature values different from 0 C
MR medium rating busbar five conductor (aluminium) technical data Complies to : IEC EN 9- DIN VDE 00 part 00 and 0 Suitable for the following climates : Constant humid climate (DIN IEC 8 and ) Cyclical humid climate (DIN IEC 8 and 0) L+N 00% +PE 00% (Aluminium) Rated current Operational voltage Insulation voltage Frequency Rated shortcircuit current withstand for -phase fault ( s) Specific Energy withstand for -phase fault Peak current Rated short-time current for single-phase fault Ph-N( s) Peak current for single-phase fault Ph-N Rated short-time current single-phase fault Ph-PE ( s) Peak current single-phase fault Ph-PE Phase resistance at 0 C Phase resistance at thermal conditions (I n ; 0 C) Phase reactance (0 Hz) Neutral resistance at 0 C Neutral reactance (0 Hz) Resistance of the protective bar Reactance of the protective bar (0 Hz) Resistance of the phase-pe fault loop Reactance of the phase-pe fault loop (0 Hz) Resistance of the phase-neutral fault loop Reactance of the phase-neutral fault loop (0 Hz) Voltage k drop coeff. with Voltage k drop coeff. with distribuited load (k) distributed load (k) Losses for the Joule effect at nominal current Fire load Overall dimensions of the busbar Degree of protection (CEI EN09) IK code CEI EN008-- In (A) Ue (V) Ui (V) ƒ (Hz) Icw (ka)rms I t (M A s) Ipk (ka) Icw (ka)rms Ipk (ka) Icw (ka)rms Ipk (ka) R0 (mω/m) Rt (mω/m) X (mω/m) Rn0 (mω/m) Xn (mω/m) RPE (mω/m) XPE (mω/m) RPh-Pe fault loop (mω/m) XRPh-Pe fault loop (mω/m) RPh-N fault loop (mω/m) XRPh-N fault loop (mω/m) v (V/m/A)0 - cosϕ = 0 70 v (V/m/A)0 - cosϕ = 0 7 v (V/m/A)0 - cosϕ = 0 80 v (V/m/A)0 - cosϕ = 0 8 v (V/m/A)0 - cosϕ = 0 90 v (V/m/A)0 - cosϕ = 0 9 v (V/m/A)0 - cosϕ = 00 P (W/m) (kwh/m) (kg/m) L x H (mm) IP IK 0 0 00 00 0 800 000 000 000 000 000 000 000 000 90 000 000 000 000 000 000 000 90 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0 0 900 9 9 900 0 7 7 9 8 8 0 0 0 9 8 0 0 0 0 9 0 8 0 97 0 0 0 077 0 00 0 0 0 09 0 0 0 0 0 0 0 08 0 070 0 0 0 0 0 0 0 8 0 0 0 0 0 097 0 09 0 09 0 9 0 8 0 97 0 0 0 077 0 00 0 0 0 09 0 0 0 0 0 8 0 0 0 0 0 097 0 09 0 09 0 0 0 7 0 0 08 0 00 0 00 0 0 0 0 0 9 0 0 0 0 0 07 0 08 0 0 0 0 0 0 0 8 0 0 9 0 7 0 0 0 0 087 0 79 0 07 0 87 0 0 0 78 0 0 0 9 0 7 0 77 0 0 8 0 8 0 0 0 09 0 0 0 0 0 7 0 0 0 0 0 9 0 9 0 8 9 7 79 09 0 90 8 0 79 80 0 08 00 88 9 8 80 9 07 98 8 08 8 8 79 7 0 9 8 77 7 00 9 77 7 9 9 9 9 8 9 7 8 0 90 70 0 8 79 78 78 97 0 8 8 8 8 8 7 8 0 8 9 7 9 7 x 9 7 x 9 7 x 9 x 9 x 9 x 9 x 9 x 9 - - - - - - - - 0 0 0 0 0 0 0 0 : Values for 0 s Temperature rating schedule Mean room temperature ( C) 0 0 0 0 0 K factor 08 0 0 0 97 0 9 0 9 0 89 Multiplier coefficient of nominal rating for room temperature values different from 0 C
MR medium rating busbar five conductor (copper) technical data Complies to : IEC EN 9- DIN VDE 00 part 00 and 0 Suitable for the following climates : Constant humid climate (DIN IEC 8 and ) Cyclical humid climate (DIN IEC 8 and 0) L+N 00% +PE 00% (Copper) Rated current Operational voltage Insulation voltage Frequency Rated shortcircuit current withstand for -phase fault ( s) Specific Energy withstand for -phase fault Peak current Rated short-time current for single-phase fault Ph-N( s) Peak current for single-phase fault Ph-N Rated short-time current single-phase fault Ph-PE ( s) Peak current single-phase fault Ph-PE Phase resistance at 0 C Phase resistance at thermal conditions (I n ; 0 C) Phase reactance (0 Hz) Neutral resistance at 0 C Neutral reactance (0 Hz) Resistance of the protective bar Reactance of the protective bar (0 Hz) Resistance of the phase-pe fault loop Reactance of the phase-pe fault loop (0 Hz) Resistance of the phase-neutral fault loop Reactance of the phase-neutral fault loop (0 Hz) Voltage k drop coeff. with distribuited Voltage k drop load (k) coeff. with distributed load (k) Losses for the Joule effect at nominal current Fire load Overall dimensions of the busbar Degree of protection (CEI EN09) IK code CEI EN008-- In (A) Ue (V) Ui (V) ƒ (Hz) Icw (ka)rms I t (M A s) Ipk (ka) Icw (ka)rms Ipk (ka) Icw (ka)rms Ipk (ka) R0 (mω/m) Rt (mω/m) X (mω/m) Rn0 (mω/m) Xn (mω/m) RPE (mω/m) XPE (mω/m) RPh-Pe fault loop (mω/m) XRPh-Pe fault loop (mω/m) RPh-N fault loop (mω/m) XRPh-N fault loop (mω/m) v (V/m/A)0 - cosϕ = 0 70 v (V/m/A)0 - cosϕ = 0 7 v (V/m/A)0 - cosϕ = 0 80 v (V/m/A)0 - cosϕ = 0 8 v (V/m/A)0 - cosϕ = 0 90 v (V/m/A)0 - cosϕ = 0 9 v (V/m/A)0 - cosϕ = 00 P (W/m) (kwh/m) (kg/m) L x H (mm) IP IK 0 00 0 800 000 000 000 000 000 000 000 000 000 000 000 000 000 0/0 0/0 0/0 0/0 0/0 0/0 0 90 9 9 9 7 7 7 8 0 0 8 0 0 0 7 0 80 0 09 0 0 0 00 0 0 0 0 0 0 9 0 08 0 0 0 0 0 0 0 88 0 9 0 0 0 0 0 7 0 80 0 09 0 0 0 00 0 0 0 0 0 88 0 9 0 0 0 0 0 9 0 7 0 07 0 00 0 0 0 08 0 0 0 0 0 08 0 07 0 07 0 07 0 0 0 0 0 0 0 0 088 0 07 0 0 89 0 0 0 9 0 9 0 9 0 8 0 0 0 0 09 0 07 0 0 89 0 0 0 9 0 9 0 9 8 08 00 8 0 9 9 7 0 00 9 9 9 8 7 0 9 0 88 79 9 0 77 8 77 0 7 7 0 7 98 0 8 8 8 8 0 0 9 0 8 7 9 9 7 x 9 7 x 9 x 9 x 9 x 9 x 9 - - - - - - 0 0 0 0 0 0 : Values for 0 s Temperature rating schedule Mean room temperature ( C) 0 0 0 0 0 K factor 08 0 0 0 97 0 9 0 9 0 89 Multiplier coefficient of nominal rating for room temperature values different from 0 C
MR medium rating busbar determining the operating current of a busbar In order to determine the correct busbar rating, the current must be established using the following criteria : type of load inputs three phase or single-phase type of circuit input from one end, from both ends, central input, etc. nominal input voltage number, power and cosj of loads which are to be fed by the busbar load diversity factor load use nominal factor assumed short circuit current at the input point room temperature type of busbar installation (edgeways, flat or vertical) When using a three phase power supply, the operating current is determined by the following formula : I b = PTOT a b d (A) Ue cosϕ medium Where : I b operating current (A) a load diversity factor (.) b load use factor (.) d feed factor (.) P TOT sum of the total active power of installed loads (W) Ue operating voltage (V) cosϕ medium average load power factor (.) The d input factor has a value of when the busbar is fed from one end only. The value is / if fed from the centre or if it is fed from each end Once the operating current has been determined, choose the busbar with a rated current immediately higher than the one calculated All Zucchini products have been designed and tested for an average room temperature of 0 C; should they be installed in rooms with average daily temperatures different from 0 C, the rated current of the busbar should be multiplied by a k factor that is greater than the unit for temperatures lower than 0 C, and lower than the unit if the room temperature is higher than 0 C Room temperature ( C) Finally, the following should be considered for the most appropriate busbar choice : I nt I b I nt = k I n 0 0 0 0 0 k, thermal correction 08 0 0 0 97 0 9 0 9 0 89 factor (.) where I nt represents the maximum current loaded by a busbar for an indefinite time at the specified room temperature Voltage drop If the length of the line is particularly long (>00m) it is necessary to check the voltage drop (hereinafter specified as v.d.). If the installation is a three phase system and the power factor is not lower than cosφ = 0.7 the v.d. may be calculated with the coefficients of the voltage drop specified in the technical data table. k Ib L v% = b 00 Vn Defined : I b Vn L v% b k b = b = b = b = b = 8 = the current that supplies the busbar (A) = the voltage power supply of the busbar (V) = the length of the busbar (m) = the voltage drop percentage = the distribution factor of the current = corresponding voltage drop factor a cosϕ (V/m/A) (see technical data table, p. -) The current distribution factor b depends on how the circuit is fed and on the distribution of the electric loads along the busbar : Supplies at one end and load at the end of the line Supplies at one end and with load evenly distributed Supplies at both ends and with load evenly distributed Central supply with loads at both ends Central supply with load distributed evenly Example : MR 00 A Al for riser mains feed I b = A operating current b = = supply from one end k = 79 = see technical data table, p. - Cosϕ = 0 8 L = 0 m line length Vn = 00 V operating voltage 79 0-0 v% = x x00 = 0 % 00 I b I b I b I b L L L L I b I b I b I b Short circuit current The short circuit current value ICW that can be supported by Zucchini busbar trunking systems allows for both electrodynamic stress and thermal energy dissipated during the fault The busbars must be able to sustain the short circuit current for the entire duration of the fault i.e. for the time required for the protective device (circuit breaker) to start operating, cutting off the metal continuity and extinguishing the electric arc Joule effect losses Losses due to the Joule effect are essentially caused by the electrical resistance of the busbar. Lost energy is transformed into heat and contributes to the heating of the conduit Three phase rating P = R t I b 0 - (W/m) Single phase rating P = R t I b 0 - (W/m)