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MetbarMet-barŽ Conductor System The Met-barŽ PVC Insulated Single Bar Conductor System is used for the safe transmission of electrical power to mobile machines. Overhead cranes and hoist monorails are typical applications. The system is designed to conform with international touchproof safety regulations which require that a prescribed testfinger cannot contact the conductor bar when applied with a 2kg pressure. The concave conductor shape provides a centralising feature for the collector brush contact. Phase conductors are coloured white and the earth conductor is coloured green for seperate identity. The recommended spacing between longitudinal hanger supports is 1.5 metres for the 100/250amp systems and 1.66 metres for the 130/400amp systems. The centre distance between adjacent bars is as per table below. We recommend that a hanger support is positioned within 150mm of a joint position. It is important to ensure that the collectors are installed in the correct position relative to the conductor bar. For ref: Centre line of bar collector mounting to contact surface of the conductor bar above. - 100/250 Amp System 110 - 120mm
- 130/400 Amp System 100 - 110mm
- Curved systems are available on request.
Conductor Bar Shroud - Material - Rigid PVC UV Stabilised
- Temperature Range -20 degrees C to +70 degrees C
Conductor Bar - Material - galvanised Steel or HDHC Copper
Duty Cycle - According to the duty cycle of the machine/crane there will be a derating of the maximum allowable ambient temperature. The following is an approximate guide.
Duty Cycle --- Maximum Ambient Temperature
100% ------------- 25O C
80% -------------- 30O C
60% -------------- 35O C
40% -------------- 40O C
20% -------------- 55O C
AKAPP 4-DuctorŽ Conductor System
AkappThe AKAPP 4-DuctorŽ conductor system is a compact, reliable and safe power supply for cranes, hoisting equipment, monorail systems, conveyor belts etc.
The basic design of the 4-Ductor is a channel housing, in which four slots are prepared to accomodate copper conductors. The flat conductors are installed without the need for joints.
Thanks to the design of the 4-Ductor and its continuous conductors, the system offers unique features: - Excellent price/quality ratio - The concept of the continuous conductors and the use of only high quality components result in a trouble-free feeding system against an agreeable price.
- Continuous copper conductors - The flat copper conductors can be pulled from rolls into the previously installed PVC housing in long continuous lengths, without any connections in the conductor.
- High current capacity - Copper conductors of various capacities can be pulled into the channels in the housing. Standard conductor capacities are 35, 50, 80, 125 and 160A.
- Simple installation - Thanks to the lightweight PVC housing, copper conductors without connections and the design of accessory components, system installation is a quick and easy operation.
- Virtually maintenance free - The PVC housing needs no maintenance and as previously mentioned continuous copper conductors ensure minimal brush wear. Thus minimising the presence of carbon deposits. Inspection periods can be scheduled in line with the schedule of the apparatus to be fed (i.e. a crane).
- Volt drop absolute minimum and constant thanks to continuous copper conductors, thus avoiding problems associated with added resistance at joints and increased volt drop characteristics when joints loosen or corrode.
- Compact design - By virtue of design, the 4-Ductor system utilises an absolute minimum of space.
- High mechanical strength - The PVC housing has a combination of high flexural yield, impact and tensile strength and is complimented by the design of associated components.
- Maximum power transmission - The brushes are positively located in the PVC housing and contact with the copper conductors is maintained by spring pressure. This guarantees a positive contact and excellent power transmission.
- Exceptional long carbon brush life is achieved due to the absence of conductor joints and connections which ensures trouble free operation.
- Safety to personnel - The high level of volume resistivity of the PVC housing ensures absolute safety to personnel.
- No expansion problems - Due to the clearance that exists between the conductors and their location, and the clearance between the PVC housing and sliding hangers, expansion due to changes in ambient temperature is accomodated without affecting the operation of the system. This also applies to extra long installations where standard components eliminate expansion problems often experienced with alternative systems.
Note:
For some applicatons, it is necessary to use the AKAPP MulticonductorŽ system
Typical examples are as follows: - 5 to 7 conductors are to be installed in one housing;
- the system requires protection using flexible sealing strips;
- the installation requires the use of transfer guides or isolation sections;
- the travel speed is in excess of 60 m/min;
- a combination of the above.
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