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CLMD33 / 33S: IP40
See capacitor nameplate for IP degree.
1.2.3
Installation and use
Indoor installation on firm foundation or fixed on a rigid plate/frame in well-ventilated situations where the air tempera-
ture around the capacitor does not exceed 35°C/95°F over one year, 45°C/113°F over 24 hours and 55°C/131°F (ac-
cording to IEC 60831 Parts 1 and 2 for a -25/D temperature category product).
CLMD13, 43, 53, 63 and 83 also exist in outdoor execution. The temperature class is then -40/D according to
IEC60831. See nameplate for specification. Exposure to sun may overheat capacitors. Special care must be taken.
WARNING! The ambient temperature for capacitors inside a cubicle is the temperature around the capacitors
and not around the cubicle.
WARNING! Like other standard capacitor units, CLMD discharge devices are not suitable for use with rapid
switching rates (minimum off time: 40"). Additional external resistors are not a solution for such cases. Only
specially designed capacitors must be used in such applications.
1.2.4
Vertical and horizontal mounting
The CLMD capacitors must be fixed in such a way as to ensure a natural airflow from bottom to top.
Minimum free space between units:
– CLMD13: 20mm
– CLMD33 / 33S: 20 mm (25mm for units ≥ 30 kvar)
– CLMD43-45, 53, 63-65 and 83-85: 50mm
In case of vertical mounting, use a punched mounting plate or support bars to allow free airflow between the capaci-
tors (Fig. #2). Do not mount upside down. (Fig. #3)
In case of horizontal mounting, install so that the natural airflow goes between the units (Fig. #4). Do not mount so
that the natural airflow is blocked (Fig. #5).
1.2.5
Installation in a cubicle
WARNING! Guidelines only apply if the following limits are respected:
– Maximum room temperature: 40°C (1 hour).
– Average maximum room temperature over 24 hours: 35°C.
– Average maximum room temperature over 1 year: 25°C.
When the capacitors are installed in a cubicle the components should be placed in such a way as to optimize the
cooling. Do preferably place devices with high heat dissipation above the capacitors to avoid overheating them. When
reactors are used, they should be placed in such a way that they do not radiate heat directly on the capacitors. A ther-
mal barrier is recommended. Reactors do in general dissipate much more heat, so their thermal impact through con-
vection must also be taken into account.
1. Natural air circulation
The difference in height between air inlet and air outlet should be large enough to improve the air circulation. The air-
flow should be channeled in such a way as to well cool the hottest spots in the cubicle. Air should flow from the bot-
tom to the top of the cubicle. The cross-section of the top air outlet should be at least equal to 1.2 times the cross-
section of the bottom air inlet.
STATUS
Released
SECURITY LEVEL
External
L O W V O LTA GE CAPA CITO RS CLM D
DOCUMENT ID
9AKK107046A5100
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