Nidec Digitax HD M75 Series Installation And Technical Manual

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Nidec Digitax HD M75 Series Installation And Technical Manual Manual pdf 30 page image

Safety information Product information Mechanical installation Electrical installation Multi axis system design Technical data30 Digitax HD M75X Series Installation and Technical GuideIssue Number: 5For compact multi axis installations, the rear venting kit allows drives to be vertically mounted one above the other, where this is the case, a minimumclearance of 100 mm (3.94 in) should be maintained between drives.Figure 3-17 Minimum clearance when vertical mountingA current derate must be applied to the drive if the rear vent kit is installed. Derating information is provided in section 6.1 Drive technical data onpage 98.Failure to do so may result in nuisance tripping.3.10 Enclosure sizing1. Add the dissipation figures from section 6.1.4 Power dissipation on page 104 for each drive that is to be installed in the enclosure.2. If an external EMC filter is to be used with each drive, add the dissipation figures from section 6.1.28 EMC filter ratings on page 113 for eachexternal EMC filter that is to be installed in the enclosure.3. If the braking resistor is to be mounted inside the enclosure, add the average power figures from for each braking resistor that is to be installed inthe enclosure.4. Calculate the total heat dissipation (in Watts) of any other equipment to be installed in the enclosure.5. Add the heat dissipation figures obtained above. This gives a figure in Watts for the total heat that will be dissipated inside the enclosure.Calculating the size of a sealed enclosureThe enclosure transfers internally generated heat into the surrounding air by natural convection (or external forced air flow); the greater the surfacearea of the enclosure walls, the better is the dissipation capability. Only the surfaces of the enclosure that are unobstructed (not in contact with a wallor floor) can dissipate heat.Calculate the minimum required unobstructed surface area A e for the enclosure from:Where:A e Unobstructed surface area in m 2 (1 m 2 = 10.9 ft2 )Text Maximum expected temperature in °C outside the enclosureTint Maximum permissible temperature in °C inside the enclosure³100mm(4in)121. Enclosure back plate.2. Enclosure rear panel.NOTEAePk Tint Text– ----------------------------------------=