Important recommendations
Never allow an exposed flame or spark near the
batteries, particularly while charging.
Never smoke while performing any operation
on the battery.
For protection, wear rubber gloves, long
sleeves and appropriate splash goggles or face
shield.
The electrolyte is harmful to skin and eyes. In
the event of contact with skin or eyes, wash
immediately with plenty of water. If eyes are
affected, flush with water and obtain
immediate medical attention.
Remove all rings, watches and other items with
metal parts before working on the battery.
Use insulated tools.
Avoid static electricity and take measures for
protection against electric shocks.
Discharge any possible static electricity from
clothing and/or tools by touching an earth-
connected part "ground" before working on
the battery.
1. Receiving the shipment
Unpack the battery immediately upon arrival. Do
not overturn the package. Transport seals are
located under the cover of the vent plug. The
battery is normally shipped filled and ready for
installation.
Make sure all items have been received by
comparing with the packing list.
Check for damage or electrolyte spillage.
Report any irregularities to the carrier and to
Saft.
Remove the plastic transport seals. The battery
must never be used electrically with the plastic
transport seal in place as this can cause
permanent damage.
The battery is ready for installation.
2. Storage
Store the battery indoors in a dry, clean, cool
location (0°C to +30°C / +32°F to +86°F).
Make sure that the transport seals remain in
place during storage.
Do not store in direct sunlight or exposed to
excessive heat.
A battery delivered charged (80 %) must not be
stored more than 3 months up to 30°C, or
more than 6 months up to 20°C (including
transport). If a charged battery has to be
stored for more than the durations and
associated temperatures mentioned above,
discharge the cells at 0.2 C
5
A down to 1V per cell or less.
SRA/SRA LT/SRA HT Ni-Cd Batteries
Installation and operating instructions
A battery delivered discharged and filled may
be stored for many years before it is installed.
If storage is required prior to commercial
service, clean and coat the metallic parts with a
thin layer of neutral vaseline or neutral
petroleum jelly grease approved by Saft. Leave
the battery in its transport case to protect from
dust, moisture and short circuits.
3. Installation
Remove the transport seals and close the vent
plugs.
3.1.
Verify that cells are correctly interconnected
and that battery connection to the load is also
correct.
3.2.
Check tightness of terminal connecting nuts.
Torque applied must be:
• 10 ± 2 N.m for cells
SRA 75 to140
SRA LT 75 to140
SRA HT 70 to130
• 30 ± 3 N.m for cells
SRA 160 to 375
SRA LT 160 to 375
SRA HT 150 to 350
The connectors and terminal nuts should be
corrosion-protected by coating with a thin layer
of DW33 anti-corrosion greasy film.
3.3.
Electrolyte
The electrolyte used is specific for each product
line:
• SRA: E 41
• SRA LT: E 34
• SRA HT: Na 15 L
4. Commissioning
Caution: during constant charging operations,
the battery box must be open.
4.1.
The cells are delivered 80 % charged.
Charging and discharging should be done at
constant current.
For a battery stored less than 3 months at T<
+30°C, or less than 6 months at T< +20°C,
no charge/discharge operation is required
before use.
For a battery stored for more than 3 months or
at T>+30°C, or more than 6 months at
T>+20°C :
• Discharge the battery at 0.2 C
5
A down to an
average 1V per cell.
• Maintain the battery in open circuit during 8
hours or until the battery temperature is
between 10°C and 30°C.
• Charge the battery at 0.2 C
5
A for 8 hours.
4.2.
The cells are delivered discharged
Caution: even if the battery is discharged, there
remains a residual charge that may cause an
electric shock.
Charging and discharging should be done at
constant current.
For a battery placed into service immediately
after delivery or after less than one year of
storage:
• Preferred solution: constant current charge;
charge the battery at 0.2 C
5
A for 8 hours.
Caution: during constant current charging the
battery box must be open.
• Constant voltage charge: 1.55V/cell for
20 hours with the current limited at 0.2 C
5
A.
For a battery stored for more than 1 year:
• Charge the battery at 0.2 C
5
A for 8 hours.
• Discharge the battery at 0.2 C
5
A down to an
average 1V per cell.
• Maintain the battery in open circuit during 8
hours or until the battery temperature is
between 10°C and 30°C.
• Charge the battery at 0.2 C
5
A for 8 hours.
The battery is ready for use.
5. Charging in service
1.47 V/cell at +20°C (+68°F) with voltage
compensation:
- 3 mV/°C/cell (-1.7 mV/°F/cell).
For higher charging voltages, consult your local
Saft representative.
Boost charge according to IEC62973-2.
6. Topping-up
Frequency of topping-up must be determined for
each battery. Topping-up shall be performed
after the first year in order to determine the ideal
topping-up interval which depends on the
charging voltage and actual use of the battery.
Never let the electrolyte level fall below the
minimum level mark. Use only distilled or
deionized water to top-up.
If charge at constant current : operation must be
carried on charged cells with a rest time of
June 2020
-
RE
DU
CED TCO -
UPGR
ADED
VERSION
- IN 202
0
-
