Siemens SINAMICS S120 Посібник із застосування - Сторінка 26

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Siemens SINAMICS S120 Посібник із застосування
Marine-specific application conditions
● EMC emitted interference
A differentiation must be made regarding emitted interference:
– All 400V and 200V devices with a Class A filter, which are allowed for Category C2
– All other devices – especially all 690 V devices (irrespective of whether equipped with
● Power supply conditions
It should be carefully taken into consideration that on board marine vessels, the power
supplies are "weaker" than industrial power supplies (line voltage, grade) in land-based
plants and systems. The line short-circuit ratio must be carefully taken into consideration
on a project-for-project basis. It is especially important to ensure an appropriately fast
shutdown (trip) when short-circuits/ground faults occur. It must also be expected that
power supplies on board marine vessels are possibly not as "stable" as industrial power
supplies; further, steady-state as well as transient deviations of the supply voltage/line
frequency are significantly more pronounced.
The converters being considered here comply with the steady-state and transient
voltage/frequency deviations described in IACS "Requirements concerning ELECTRICAL
INSTALLATIONS" (2018).
● Housing (all components are built-in types)
The required control cabinet degree of protection depends on the actual location in the
vessel.
The control cabinet must provide integrated components with adequate protection against
pollution, water and condensation. Further, it must prevent access to dangerous active
parts and components. The integrated components are designed for degree of pollution 2
according to DIN EN 61800-5-1 (11.2017).
Where necessary, depending on the usage location, minimum requirements specified by
the client or the marine classification society involved must be taken into careful
consideration. The actual contract defines the IP degree of protection according to
IEC 60529.
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according to IEC 61800-3, are also suitable for the "General power distribution zone"
according to IEC 60533
The preconditions described in the "Standard documentation" (cabinet installation,
EMC measures, limited motor cable length, ...) must be observed.
It is only permissible to use devices equipped with line filter in combination with a
power supply system with grounded neutral point.
or without line filter) – are only intended for use in the "Special power distribution
zone" according to IEC 60533, assuming that no other EMC measures are applied.
Using SINAMICS G120 / G120C / S120 Blocksize converters in marine applications
Application Manual, 11/2019, A5E48346362A