Eaton SVS/12, User Manual

Page: 33 / 138

SVS/12
994.530 G01 02 33
3. SETTING UP THE SYSTEM
3.1 Guidelines for the switchroom
3.1.1 General
Space considerations
The dimensions of the installation are indicated on the floor
plan. This forms part of the overall documentation pack
(see chapter 9). The dimensions of the electrical
switchroom can be determined on the basis of the floor
plan. The requirements are set out below.
Clear space
In front of switchgear or between two facing switchgear
installations there must be a clear space along the whole
length. This clear space must be at least 3 m wide and 2 m
high.
There must be no projecting parts within the clear space.
The width of clear spaces is measured from the front of
projecting parts and not from the front of the switchgear.
The height must be measured from the floor or from the
platform in front of the switchgear.
The space needed for extension (to the left or right side)
must be as follows:
N
1
x 420 mm + N
2
x 630 mm + 330 mm
where:
N
1
= number of panels 420 mm wide (630 A)
N
2
= number of panels 630 mm wide (630 A or 1250 A)
Escape routes
In front of switchgear or between two facing switchgear
installations there must be an escape route over the whole
length at least 0.5 m wide and 2 m high.
Escape routes must be in a straight line as far as possible.
There must be no projecting parts within these escape
routes.
The width of escape routes must be measured from the
furthest projecting parts. It is important to take into account
the turning direction of doors; doors that are designed to be
closed must not be capable of blocking each other.
The height must be measured from the floor or from the
platform in front of the switchgear.
Entrances
Entrances must be provided at suitable places to rooms in
which switchgear is set up. These entrances must be at
least 0.75 m wide and 2 m high.
Finally, these entrances must be accessible from the
escape routes via connecting routes at least 0.5 m wide
and 2 m high.
Doors must:

open outwards

be able to be opened from the inside without tools
With regard to the dimensions of the door, it is necessary to
take into account the dimensions of the installation.
The climate

The climate in the switchroom must comply with the
requirements of IEC 62271-1. Under this regulation, the
nominal conditions for indoor installation are as follows:

Ambient temperature must be not more than
40 ºC and not less than -5 ºC for "class minus
5 indoor".

Altitude must be < 1000 m.

The environment must not be polluted by
dust, smoke, corrosive or inflammable
vapours or salts; only occasional
condensation is permitted.

Relative humidity must be not greater than
95% (measured over a 24-hour period).
Special operating conditions
In this case, the requirements of IEC 62271-1 are
applicable. This means that special agreements must be
concluded with the user of the installation.
In the case of stations installed in areas with high relative
humidity or a high groundwater level, particular attention
must be paid to the prevention of condensation. The same
applies to installations in areas abounding in water.