Operating And Storage Conditions; Maintenance; Cooling Fan - Delta Elektronika SM 7-80 Instruction Manual

DELTA ELEKTRONIKA BV

OPERATING AND STORAGE CONDITIONS

TEM PER A TURE
1)
The op er at ing tem per a ture range at full load is –20 to +50 °C.
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But this tem per a ture range only holds when the AIR-IN TAKE and
at least one of the AIR-OUT LETS is un ob structed and the tem per -
a ture of the AIR-IN TAKE is not higher than +50 °C.
Please note: a lower tem per a ture ex tends the life of the
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power sup ply.
When the power sup ply is mounted in a cab i net please note that
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the tem per a ture of the AIR-INTAKE should be kept low and avoid
a short cir cuit in the air flow i.e. the hot air leav ing the AIR-OUTLET
en ter ing the AIR-INTAKE again.
The stor age tem per a ture range is –40 to +85 °C.
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HU MID ITY
2)
Dur ing nor mal op er a tion hu mid ity will not harm the power sup ply,
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pro vided the air is not ag gres sive. The heat nor mally pro duced in
the power sup ply will keep it dry.
Con den sa tion.
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Avoid con den sa tion in side the power sup ply, break-down could
be the re sult.
Con den sa tion can oc cur dur ing a pe riod the power sup ply is
switched off (or op er at ing at no load) and the am bi ent tem per a ture
is in creas ing .
Al ways al low the power sup ply to dry be fore switch ing it on again.
GAL VANIC IN DUS TRY
3)
For us ing the power sup plies in the gal vanic in dus try it is strongly
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rec om mended to take pre cau tions against an ag gres sive en vi ron -
ment.
An ag gres sive en vi ron ment with acid, salt, etc. can harm the elec -
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tronic com po nents. Some times even the cop per tracks on the
printed cir cuit boards dis solve.
To avoid prob lems, the power sup plies should be mounted in a
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rel a tively clean room, or mounted in a cab i net re ceiv ing clean air
with over pres sure, or in a cab i net with a heat exchanger.

MAINTENANCE

GEN ERAL
1)
The SM-series power sup plies nor mally need no main te nance or
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cal i bra tion. Only care must be taken that the cool ing of the unit is
not ob structed.

COOLING FAN

2)
The built up of dust on the im pel ler of the fan and the heat sink fins
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de pends on the en vi ron ment. Since the fan has over-ca pac ity,
dust will not pres ent a prob lem very quickly.
The in ter nal con struc tion of the power sup ply is such that no dust
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will reach the sen si tive con trol cir cuitry, only the heat sink in a tun -
nel will be cooled by forced air (see fig. 4 - 13).
The ther mal pro tec tion will shut down the out put in case of over -
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heat ing, so the power sup ply will not be dam aged.
It is ad vis able to in spect the fan and the heat sink reg u larly.
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Page 4 - 5 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING
fig. 4 - 13
The fan blows through an in ter nal tun nel,
where the heatsink is sit u ated.
Al ways take care to have at least one air out let
un ob structed.
SM800
October 2007