Aluminium Busbar rated values 800–4000A

800A 1000A 1250A 1600A 2000A 2500A 3200A 4000AStandardsRated current 800A 1000A 1250A 1600A 2000A 2500A 3200A 4000A

Rated insulation voltage (Ui) 1000 Vac 1000 Vac 1000 Vac 1000 Vac 1000 Vac 1000 Vac 1000 Vac 1000 Vac

Rated frequency 50Hz 50Hz 50Hz 50Hz 50Hz 50Hz 50Hz 50HzPhase resistance R20 [Ω/m] 0.0000744 0.0000509 0.0000387 0.0000302 0.0000242 0.0000193 0.0000151 0.0000121

Phase resistance Rt [Ω/m] 0.000109 0.0000787 0.0000578 0.0000478 0.0000363 0.0000302 0.0000242 0.0000195

Phase reactance 50Hz [Ω/m] 0.0000213 0.0000145 0.0000114 0.0000101 0.00000813 0.00000996 0.0000083 0.00000752

PE resistance 1 (at 20°C)Internal Aluminium bar [Ω/m] 0.0000744 0.0000509 0.0000387 0.0000302 0.0000242 0.0000193 0.0000151 0.0000121

PE resistance 2 (at 20°C)Aluminium case [Ω/m] 0.0000173 0.0000158 0.0000146 0.0000133 0.0000121 0.0000119 0.0000096 0.0000084

Fault-loop resistance of Phase to N [Ω/m] 0.0003990 0.0002620 0.0001920 0.0001660 0.0001230 0.0000990 0.0000830 0.0000601Fault-loop reactance of Phase to N [Ω/m] 0.0001310 0.0000952 0.0001090 0.0000546 0.0000487 0.0000480 0.0000328 0.0000224Fault-loop resistance of Phase to case PE [Ω/m] 0.0002990 0.0002850 0.0002040 0.0001950 0.0001860 0.0001770 0.0001610 0.0001290Fault-loop reactance of Phase to case PE [Ω/m] 0.0002240 0.0001990 0.0001970 0.0001410 0.0001250 0.0001230 0.0001170 0.0001110

- Unity pf 0.000188794 0.000136312 0.000100113 0.000082792 0.000062873 0.000052308 0.000041916 0.000033775- 0.9 pf 0.000185995 0.000133628 0.000098708 0.000082138 0.000062724 0.000054597 0.000043990 0.000036075- 0.8 pf 0.000173170 0.000124119 0.000091937 0.000076730 0.000058748 0.000052197 0.000042158 0.000034835- 0.7 pf 0.000158502 0.000113354 0.000084180 0.000070447 0.000054068 0.000048935 0.000039607 0.000032944

- Rated 1-second short-time withstand current Icw [kA] 40 60 70 90 100 100 100 100- Peak current withstand [kA] 84 132 154 198 220 220 220 220

Weight of trunking [Kg/m]4-bar distribution (TP&N + case earth) 15 18 21 25 29 37 45 53

Degree of protection to BSEN60529175 x 140 175 x 170 175 x 200 175 x 235 175 x 275 175 x 340 175 x 410 175 x 490233 x 162 233 x 192 233 x 222 233 x 257 233 x 297 233 x 362 233 x 432 233 x 512

Trunking Size W x D [mm]: a) trunking* b) overall including joint covers*

- This figure allows an estimate to be made of the voltage drop along a run. This is the phase-to-phase voltage drop per ampere of load, along a 1m run without tap-offs. When loaded with tap-off units evenly distributed along the run the figures are multiplied by 0.55. See example of application below. Note that it is advisable to check the actual voltage drop on the completed installation.

4000A

IP4X or IP54

Fault current protection (S/C)

800A 1000A 1250A 1600A 2000A 2500A 3200A

- The short-time current and time together with the peak withstand current allow determination of circuit-breaker characteristics required for S/C protection.

BSEN60439-2, EN60439-2, IEC60439-2

- This is the resistance R20 (at 20°C) of the conductor of each phase pole and the neutral and is used in the calculation of fault current, earth-loop impedance and voltage drop.

- This is the resistance Rt at full-load operating temperature of the conductor of each phase pole and the neutral and is used in the calculation of earth-loop impedance where required by wiring regulations.

Overload current protection Rated current of fuses or circuit breaker

- These fault-loop values permit calculations of short circuit and fault currents in every point of an electrical installation including the busbar trunking system.

- This is the maximum current per pole. Single-phase tap-off units must be evenly distributed across the poles so as not to exceed the current rating in one pole or the neutral.

- This is a.c. voltage that the trunking system is designed for and is the maximum 3-phase voltage that trunking system is designed to operate at in service.

- This is the inductive reactance X of each phase pole and the neutral and is used in the calculation of fault current, volt-drop and circuit impedance

- The PE resistance and reactance are used in the calculation of the fault level to earth.

Volt-drop [V/A/m]