Table A:
Cell type C
5
Ah
0.2 C
5
A
Electrolyte
Topper nozzle
(Ah)
(A)
reserve (cm
3
) (mm)
SRA 75
75
15
185
59
SRA 90
90
18
285
59
SRA 110
110
22
280
59
SRA 125
125
25
335
59
SRA 140
140
28
335
59
SRA 160
160
32
575
54
SRA 190
190
38
570
54
SRA 220
220
44
645
54
SRA 260
260
52
765
54
SRA 280
280
56
900
54
SRA 310
310
62
900
54
SRA 340
340
68
1085
54
SRA 375
375
75
1085
54
SRA LT 75
75
15
185
59
SRA LT 90
90
18
285
59
SRA LT 110
110
22
280
59
SRA LT 125
125
25
335
59
SRA LT 140
140
28
335
59
SRA LT 160
160
32
415
39
SRA LT 190
190
38
410
39
SRA LT 220
220
44
465
39
SRA LT 260
260
52
555
39
SRA LT 280
280
56
650
39
SRA LT 310
310
62
645
39
SRA LT 340
340
68
785
39
SRA LT 375
375
75
780
39
SRA HT 70
70
14
185
59
SRA HT 85
85
17
285
59
SRA HT 105
105
21
280
59
SRA HT 115
115
23
335
59
SRA HT 130
130
26
335
59
SRA HT 150
150
30
575
54
SRA HT 175
175
35
570
54
SRA HT 200
200
40
645
54
SRA HT 245
245
49
765
54
SRA HT 265
265
53
900
54
SRA HT 290
290
58
900
54
SRA HT 315
315
63
1085
54
SRA HT 350
350
70
1085
54
minimum of 2 hours.
If charge at constant voltage on the train, the
topping-up can be carried out at any time.
Batteries not equipped with a water filling
system (typical frequency of topping-up is
every 6 months):
• No electrolyte level measurement is necessary
if you use a Saft cell-topper, which allows the
correct level to be obtained by a simple nozzle
setting (see nozzle lengths in Table A). If a cell-
topper is not available, the electrolyte level
must be measured.
• Insert a transparent glass or plastic tube (alkali
resistant, 5 to 6 mm in diameter) vertically into
the cell vent until it touches the top of the
plates. Close the top end of the tube by putting
a finger on it and remove it from the cell. The
height of the liquid in the tube indicates the
electrolyte level.
Cell type
Level (mm)
high low
SRA 75 to 140
66
15
SRA 160 to 375
75
15
SRA LT 75 to 140
66
15
SRA LT 160 to 375
59
15
SRA HT 70 to 130
66
15
SRA HT 150 to 350
75
15
Batteries equipped with water filling system
(typical frequency of topping-up is every 12
months):
• Remove transport seals and connect hydraulic
tubing between cells up to a maximum of 50
cells.
• Make sure that the tubes are completely
inserted for a good seal.
• The hydraulic connection of cells must be in
parallel to the electrical connection, in order to
avoid voltage differences of more than 1.2V
between two hydraulically connected cells.
• The hydraulic connection must be horizontal in
order to avoid siphoning.
• The water filling circuit output must not be too
close to electrical equipment, electrical circuit
and metallic structure.
• Water filling circuit input must be connected to
the self-closing inlet.
• Topping-up can be performed (for SRA range,
every 6 years if the annual average cell
temperature is below 30°C and the battery is
used as a back-up battery) by gravity or using
adapted pump with a flow rate of 0.7 l/min at a
relative pressure of 0.3 bar maximum.
7. Preventive maintenance
Maintenance operations (not including the
topping-up operation): periodic maintenance
should be carried out at least every 5 years. And
for SRA range, it shall be carried out up to every
10 years if the annual average cell temperature
is below 30°C and the battery is used as a back-
up battery.
For detailed maintenance, please refer to the
maintenance manual of the battery.
• Keep the battery clean using only water. Do not
use a wire brush or solvents of any kind. Vent
plugs can be rinsed in clean water.
• Check the torque of all terminal screws. Coat
with DW33 anti-corrosion greasy film all the
terminal nuts and cell connectors.
• Check charger settings. It is very important that
the recommended charging voltage remains
unchanged. High water consumption of the
battery is usually caused by improper voltage
setting of the charger.
8. Electrolyte
Do not change the electrolyte during the life time
of the cells.
9. Environment
To protect the environment all used batteries
must be recycled. Contact your local Saft
Saft
ESS & Mobility
26 quai Charles Pasqua
92300 Levallois-Perret
Tel: +33 1 58 63 16 00
Fax: +33 1 58 63 16 18
www.saftbatteries.com
Doc N° 21881-2-0620
Edition: June 2020
Data in this document is subject to change without notice and
becomes contractual only after written confirmation.
Société anonyme au capital de 31 944 000 €
RCS Nanterre 383 703 873
Published by the ESS & Mobility Communications Department
SRA/SRA LT/SRA HT Ni-Cd Batteries
