Dimensioning Information For Liquid-Cooled Sinamics S120 Cabinet Modules; Degrees Of Protection Of Liquid-Cooled S120 Cabinet Modules; Required Dc Busbar Cross-Sections And Maximum Short-Circuit Currents - Siemens SINAMICS G130 Engineering Manual

7.3.2 Dimensioning information for liquid-cooled SINAMICS S120 Cabinet Modules

7.3.2.1

Degrees of protection of liquid-cooled S120 Cabinet Modules

Standard EN 60529 covers the protection of electrical equipment by means of housings, covers or equivalent, and
includes:
1. Protection of persons against accidental contact with live or moving parts within the housing and protection of the
equipment against the entry of solid foreign particles (touch protection and protection against entry of solid
foreign particles)
2. Protection of the equipment against the entry of water (water protection)
3. Abbreviations for the internationally agreed degrees of protection.
The degrees of protection are specified by abbreviations comprising the code letters IP and two digits.
The following table lists the degrees of protection in which liquid-cooled S120 Cabinet Modules are available. IP21 is
standard. Higher degrees of protection are optionally available.
Degree of First digit
protection (protection against accidental contact and solid matter)
IP21 Protected against solid matter,
diameter 12.5 mm and larger
IP23 Protected against solid matter,
diameter 12.5 mm and larger
IP43 Protected against solid matter,
diameter 1 mm and larger
IP55 Protected against dust
Entry of dust is not totally prevented, but dust must not
be allowed to enter in such quantities that the
operation or safety of the equipment is impaired.
Complete shock protection
Degrees of protection of liquid-cooled S120 Cabinet Modules: Basic version IP21, higher degrees of protection as option
M23 – M55
On the condition that the ambient conditions are within the specified limits, no further measures need to be taken for
the cabinet units irrespective of their degree of protection.
Cabinet height: IP21 – IP43
IP55
7.3.2.2

Required DC busbar cross-sections and maximum short-circuit currents

DC busbars are not integrated in S120 Cabinet Modules as standard. These must be selected as a "required option"
for Cabinet Modules. The DC busbars must be dimensioned according to the load requirements, operating conditions
and the individual configuration of the cabinet line-up. The optional "required assignment" helps to reduce
dimensioning errors and forces the planner to carefully consider the DC busbar selection with respect to the currents
which can potentially occur in normal operation and under short-circuit conditions.
The required option does not apply to the following Cabinet Modules:
§ Auxiliary Power Supply Modules (available soon)
§ Heat Exchanger Modules
These Cabinet Modules can or must be installed in the cabinet line-up in such a way that no DC busbars are required
(e.g. at the start or end of the cabinet line).
Second digit
(protection of the equipment against the penetration of water)
Protected against drip water.
Vertically falling drip water must not have a harmful effect.
Protected against spray water.
Water sprayed on both sides of the vertical at an angle of up to
60° must not have a harmful effect.
Protected against spray water.
Water sprayed on both sides of the vertical at an angle of up to
60° must not have a harmful effect.
Protected against splash water.
Water splashing against the enclosure from any direction must
not have a harmful effect.
2200 mm / roof closed, air enters cabinet through ventilation opening at bottom of
doors, air is expelled through ventilation opening at top of doors, cabinet is mainly
cooled by the coolant and only marginally by air.
2200 mm / cabinet closed, cabinet is cooled exclusively by the coolant.
SINAMICS Engineering Manual – November 2015
SINAMICS S120 Cabinet Modules
Engineering Information
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Ó Siemens AG