Runs Cooler than Standard Switchboards
- Much of a Switchboards Heat Rise is Due to the Busbars
- MerTower has up to 75% Less Copper Busbars
- MerTower Distributed Busbars Carry Half the Current of Standard Switchboards
- Switching Devices Fitted in Much Larger Compartments than Schneider Tested Design
- Unique Ventilated Plinth and Cooling Tower
Because the MerTower only includes one set of vertical busbars, the load is equally split between the top and bottom halves of the bars. By carefully feeding all the outgoing circuits equally from top and bottom the current in the busbars is only half of the total load.
This not only ensures that there is plenty of manoeuvre as loads increase in the future but also allows the bars to run at a lot lower temperature.
Compared to a similar ‘back to the wall’ switchboard, the MerTower uses up to 75% less copper busbars for the same amount of distribution ways. This not only dramatically reduces the overall temperature of the board but also reduces the cost and carbon footprint.
All MerTowers are put through our Temperature Calculation software to ensure that each board complies fully with IEC 61439-2 and as detaild in IEC 60890.
Our Temperature Calculation Software includes all the device manufacturers temperature rise and heat loss details specific to each device. We take these details and the metalwork heat loss figures and calculate the temperature build up within the MerTower as explained in the European Standard IEC 60890. This way we can ensure that the temperature within the switchboard never gets higher than the requirements of IEC 60890 which allows us to offer a verified board utilising the calculation and design rules as required in the latest IEC 61439-2 standard.
Most medium and small LV switchboards (up to 1600 Amps) are mounted in the switch-room of a building up against a wall. According to IEC 60890 this does not allow the calculations to assume any heat loss through the back of the board. But the MerTower has a patented cooling tower which allows an area at the back of each sections device chamber to remove heat from the rear.
The MerTower cooling tower sucks air through the specially designed louvred plinth and up through the centre of the board where all the devices busbar connections are. This innovation not only removes more heat from the devices but directly from the connections. The air is then dispelled through the raised or ventilated roof panel. For very hot environments a forced ventilation fan can also be fitted in the roof.
It can be seen that by utilising all of the following features and innovations why we claim that the MerTower runs cooler than other switchboards with the same number and sizes of incomer and outgoing devices.
TOP SECTION VIEW SHOWING COOLING TOWER AND PHOTOs WITH ONE SIDE REMOVED