1. Application
support in this process. Please fi ll in and return the questionnaire
- Defi ned point of intersection between battery and UPS.
(see next page).
- Isolation of the battery during service and maintenance work.
- Protection of the battery against over-heating and mechanical
3. Features and benefi ts of EFEN battery switches and battery
damage in the case of short-circuits.
fuse-links for UPS.
- EFEN battery fuse-links provide superior short-circuit protection.
2. Selection criteria for EFEN battery switches and battery
- Silver fuse elements resistant to ageing prevent premature inad
fuses
vertent
tripping.
- Single-pole NH load-break switches in sizes from 00 to 4a are
- Low power dissipation prevents overheating of plastic compo
specifi cally suited to isolate and safeguard backup batteries in
nents.
UPS applications. General-purpose line protection fuses are usu
- Parallel contact isolation with two arcing chambers provides
ally
not suitable for use in these applications. Fast-acting fuses
excellent DC breaking capacity.
must be used. The extra heat coming from these fuse-links has
- High thermal stability of plastics prevents overheating even under
to be taken into account when selecting suitable fuse switches.
overload conditions.
EFEN uses highly temperature-resistant materials that allow for
- A complete range of fuse switches and fuse-links for optimal pro
optimum space utilization and reliable operation.
tection
of all industry-standard UPS systems up to 550 V battery
- Specifi c care must be taken to select the correct fuse-links for
voltag
battery protection. Fuse elements for UPS systems must be
resistant to ageing in order to prevent premature tripping under
permissible load.
- The fuse-link characteristics must be carefully selected accord
ing
to the UPS system and the battery rating in order to provide
reliable full-range protection of the battery. EFEN offers expert
