Alpha Technologies Industrial Ni-Cd Batteries Standard Range - Manual (Page 24)

24 EN-ALPHA-TMSR-001 (10/09)
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7.3. Installation, continued
7.3.3 Setting up
Always pay attention to the assembly drawings, circuit diagrams and other separate instructions. The
transport plugs have to be removed and replaced by the vent caps included in the accessories. If batteries
are supplied “fi lled and charged” fi rst the electrolyte level should be checked and if necessary topped up as
described in point 3.4. Cell connectors and/or fl exible cables should be checked to ensure they are tightly
seated. Terminal nuts, screws and connectors must be tightly seated. If necessary tighten with a torque
spanner.
Torque loading for:
M10: 8 Nm
M16: 20 Nm
M20: 25 Nm
Female thread:
M 8: 20 - 25 Nm
M10: 25 - 30 Nm
The connectors and terminals should be corrosion-protected by coating with thin layer of anti corrosion
grease.
7.3.4 Electrolyte
The electrolyte for Ni-Cd batteries consists of diluted caustic potash solution (specifi c gravity 1.20 kg/litre
± 0.01 kg/ litre) with a lithium hydroxide component, in accordance with IEC 60993. The caustic potash
solution is prepared in accordance with factory regulations. The specifi c gravity of the electrolyte does not
allow any conclusion to be drawn on the charging state of the battery. It changes only insignifi cantly during
charging and discharging and is only minimally related to the temperature.
Battery delivered unfi lled and discharged: if the electrolyte is supplied dry, it is to be mixed according
to the enclosed mixing instruction. Remove the transport plugs from the cell just before fi lling. Fill the cells
up to 20 mm above the lower level mark "MIN". Steel cased cells have to be fi lled up to the top edge of the
plates. When using battery racks fi ll cells before putting up. Only use genuine electrolyte.
Battery delivered fi lled and charged or discharged: check electrolyte level. It should not be less than 20
mm below the upper level mark "MAX" see 5.2.
"Only use genuine electrolyte supplied by Alpha".
7.0 Installation and Operation, continued
Fig.7-1 Terminal connection with Nuts Fig. 7-2 Terminal connection with Screws