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Mechanical Installation
QFE
page 1-4
FD841205_F
1
Mechanical Installation
1.1
Mounting
Fix the unit to a flat, vertical surface using the mounting holes
(or slots)
on its base-plate.
The mechanical outline diagrams, shown in section 1.5, give the dimensions and mounting
hole positions for each model. Ensure that:
· The orientation of the unit has the ‘TOP’ uppermost .
· The location allows adequate front access.
· You can view the alphanumeric display.
1.2
Requirements for an Enclosure
For a typical industrial environment, an enclosure would provide the following:
· A single location for the unit and its protection/isolation switch-gear.
· The safe termination of cabling and/or bus-bars.
· Means to effect proper air flow through the enclosure.
1.3
Ventilation
The installer must ensure that the enclosure can maintain the operating temperature below
40 ºC or with de-rating 60 ºC . To ensure that the unit operates within a suitable temperature
range, periodically measure the internal temperature of the enclosure. If you situate the unit
above equipment that generates a significant amount of heat, reduce the unit full load rating.
1.4
Storage and De-rating
Above 40 ºC, de-rate linearly by 2% of Unit FLC/ ºC to maximum of 40% at 60 ºC.
Temperature (ºC) min.
Temperature (ºC) max.
Storage, continuous
- 25
+55
Storage, not exceeding 24 hours
- 25
+70
Operating (without de-rating)
0
+40
Operating (with maximum de-rating)
0
+60
1.5
Altitude
Condition
Maximum height above sea level (m)
Operating(without derating)
1000
Operating(with maximum derating)
2000
De-rating
Above 1000m, derate linearly by 1% Unit FLC per 100m to a maximum of 2000m.
For altitudes greater than 2000m, consult your supplier.
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