Magnetic Field Shielded Trunking
High voltage power cables, transformers and bus-bars all generate electromagnetic fields (EMF). The greater the current in these devices the more EMF they will emit. With a higher demand for power within modern buildings, the resulting emissions are becoming larger and larger. European emission standards limit the exposure of these magnetic fields to the following levels:
100µT – for public exposure (example- heart pacemaker protection)
3.75µT – for EMC equipment limits
0.4µT – for permanent occupancy or long-term exposure
VLF/ELF Magnetic field shielded containment / trunking / ductwork for EMF suppression of high current cables, risers and bus-bars.
50 Hertz
Shielding of high current cables, typically LV and HV mains feeder cables that are emitting high levels of EMF.
Magnetic Field
Optimised shielding for power frequencies (50/60 Hz) to prevent human exposure to potentially harmful levels of magnetic fields.
Building Shielding
Suitable for industrial, commercial and large residential installations. Providing conformity to long-term public exposure limits of EMF.
Magnetic Field Shielded Trunking
High current cables and bus bar systems cause significant amounts of magnetic fields.
The level of field is dependent on the amount of current carried at any particular time.
When the current load changes through equipment cycling and equipment being turned on/off then the fields will change.
These magnetic field emissions can cause problems in two ways:
• The field limits – for EMC the limit is 3.75uT
There is also a recommendation based on a child leukaemia report: 100uT max for public spaces and 0.4uT max for long exposure and residency.
• Changing fields – some sensitive equipment such as TEM machines/EEG equipment/e-beam machines cannot toleratechanging magnetic fields and continue to operate at optimum accuracy.
High Magnetic Permeability
The Global EMC ARMADILLO shielded containment system attenuates the field by a ratio of circa 10:1 so as to help attenuate the magnetic flux emanations via use of 3mm thick high magnetic permeability materials and a high conductivity design.
| Size (mm) | Size No. |
|---|---|
| 50mm x 50mm | Size 1 |
| 100mm x 100mm | Size 2 |
| 150mm x 100mm | Size 3 |
| 300mm x 125mm | Size 4 (Riser) |
Notes:
• The lids are easily removed and re-installed as ‘push on’.
• There is a retaining lanyard for each lid.
• The lids can have heat dissipation slots or can be solid.
• Sizes 1, 2 & 3 have a full range of transitions/reducers.
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 2m Containment Lengths | 50mm x 50mm | AR-CL-1 |
| 2m Containment Lengths | 100mm x 100mm | AR-CL-2 |
| 2m Containment Lengths | 100mm x 150mm | AR-CL-3 |
| 2m Containment Lengths | 300mm x 125mm | AR-CL-4 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| Flat Tee | 50mm x 50mm | AR-T-1 |
| Flat Tee | 100mm x 100mm | AR-T-2 |
| Flat Tee | 100mm x 150mm | AR-T-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 90º Bend Face Lid | 50mm x 50mm | AR-BF-1 |
| 90º Bend Face Lid | 100mm x 100mm | AR-BF-2 |
| 90º Bend Face Lid | 100mm x 150mm | AR-BF-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 90º Bend Outside Lid | 50mm x 50mm | AR-BO-1 |
| 90º Bend Outside Lid | 100mm x 100mm | AR-BO-2 |
| 90º Bend Outside Lid | 100mm x 150mm | AR-BO-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 90º Bend Inside Lid | 50mm x 50mm | AR-BI-1 |
| 90º Bend Inside Lid | 100mm x 100mm | AR-BI-2 |
| 90º Bend Inside Lid | 100mm x 150mm | AR-BI-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 45º Bend Face Lid | 50mm x 50mm | AR-45-F-1 |
| 45º Bend Face Lid | 100mm x 100mm | AR-45-F-2 |
| 45º Bend Face Lid | 100mm x 150mm | AR-45-F-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 45º Bend Outside Lid | 50mm x 50mm | AR-45O-1 |
| 45º Bend Outside Lid | 100mm x 100mm | AR-45O-2 |
| 45º Bend Outside Lid | 100mm x 150mm | AR-45O-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| 4 Way Transitions With Face Cover Only | 50mm x 50mm | AR-4W-1 |
| 4 Way Transitions With Face Cover Only | 100mm x 100mm | AR-4W-2 |
| 4 Way Transitions With Face Cover Only | 100mm x 150mm | AR-4W-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| End Covers | 50mm x 50mm | AR-EC-1 |
| End Covers | 100mm x 100mm | AR-EC-2 |
| End Covers | 100mm x 150mm | AR-EC-3 |
| Transitions | To Suit Section | Part No. |
|---|---|---|
| Spare Connection Saddles | 50mm x 50mm | AR-S-1 |
| Spare Connection Saddles | 100mm x 100mm | AR-S-2 |
| Spare Connection Saddles | 100mm x 150mm | AR-S-3 |
| Transitions | Part No. |
|---|---|
| Reducer | AR-R-1/2 |
| Reducer | AR-R-2/3 |
Disclaimer
All images are for illustration purposes only and Global EMC reserves the right to change product aesthetics.
The information presented is subject to change and is true and complete to the best of Global EMC’s knowledge.
Global EMC disclaims any liability in connection with the use of this information.