Room Dimensions And Floor Condition; Ventilation Requirements - Eaton CEAG DualGuard-S Mounting And Operating Instructions

• Below approx. -8 °C there is a risk of freezing, but this de-
pends on the state of charge. Nevertheless, it is possible
to operate the Batterys at low temperatures ander certain
conditions.
• Battery temperature affects available capacity.
• The temperature difference between blocks in a battery
string must not exceed 5 °C (5 Kelvin).

3.3 Room dimensions and floor condition

The floor of the battery rooms should be level and suitable
for carrying the weight of the battery.
From DIN EN 50272-2: The floor area where a person is within
arm's reach of the battery must be conductive enough to
prevent electrostatic charging. The leakage resistance to an
earthed point, measured according to IEC 61340-4-1, must
be less than 10 MOhm.
On the other hand, the floor must be sufficiently insulated
for the safety of persons. Therefore, the resistance of the
floor to leakage from an earthed point, measured according
to IEC 61340-4-1, must be:
• at nominal battery voltage 500 V: 50 kOhm R 10 MOhm and
• for battery voltage > 500 V: 100 kOhm R 10 MOhm.
Note 1: In order for the first part of the requirement to take
effect, maintenance personnel must wear electrostatically
conductive shoes near the battery. The footwear must comply
with EN 345.
Note 2: Arm range: 1,25 m distance (For definition of arm
range see HD 384.4.41.)... " .
Ventilation inlets and outlets: The arrangement for circulation
should be as shown below
Mounting- and Operating Instruction CEAG DualGuard-S 40071860347 January 2020 www.ceag.de
3.4 Ventilation
To avoid explosions, battery rooms must be ventilated in
accordance with DIN EN 50272-2 to dilute gas (hydrogen and
oxygen) which is released during charging and discharging.
The electrical installation does not have to be EX-protected
for this.
It must be designed for humid room conditions.
Never install the battery hermetically sealed.
Spark-forming parts must have a safety distance from the cell
or block openings (valves with sealed Batterys) in accordance
with DIN EN 50272-2.
Heating elements with open flames or glowing surfaces are
prohibited. The temperature of heating elements must not
exceed 300°C.

3.5 Ventilation requirements

Ventilation and exhaust of electrical operating rooms
Dimensioning of ventilation according to DIN EN 50272-2
(The well-known DIN VDE 0510 Part 2 has been invalid since
01.04.2003.)
The air volume flow required to ventilate a battery room
or battery container must be calculated according to the
following equation:
Q = 0.05 x n x Igas x CN x 10-3 [m3/h]
Q = the required air volume flow, in m3/h
0.05 = fixed factor
n = number of cells
Igas = the current which causes the gas development in mA
per Ah corresponds to 8 mA per Ah at high charge for sealed
lead acid Batterys.
CN = nominal capacity C10 at 20 °C for lead Batterys
Calculation example for the required air volume flow of a
DualGuard-S with 155.6 Ah lead battery sealed:
Q = 0.05 x n x Igas x CN x 10-3
Q = 0.05 x 108 x 8 x 155.6 x 10-3 m3/h
Q = 6.72 m3/h
To ensure this air volume flow of 6.72 m3/h, the supply
and return air openings in the battery rooms must have the
following minimum cross-sections in accordance with DIN
EN 50272-2.
Ventilation cross-sections of the supply and return air ope-
nings:
A - 28 x Q
A - 28 x 6.72 m3/h
A - 188,21 cm2
The required ventilation openings in the F90 walls are to
be secured in terms of building protection, e.g. by: F90 fire
dampers.
3 Set up and Installation
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