Operation Manual / Power2 340-H / High-pressure stage
6 Operation and service / 6.1 Noise emission
© Copyright 2022 ABB. All rights reserved. HZTL4054_EN Rev.F March 2022
6 Operation and service
6.1 Noise emission
WARNING
Noise hazards
Exposure to noise can harm the hearing system, impair health and the psy-
chological state and may lead to lack of attention and irritation.
u When the engine is running, always wear ear protection.
u Always wear ear protection if the sound pressure level exceeds 85 dB(A).
Wear ear protection.
The emission sound pressure level (A-weighted) is measured at a distance of 1 metre from
the low-pressure and high-pressure stage.
The highest value of the emission sound pressure level
1)
reaches a maximum of 105dB(A)
near the compressor end (compressor casing, filter silencer, air suction branch).
The following prerequisites must be fulfilled with regard to the low-pressure and high-pres-
sure stage to observe this limit value:
¡ Air inlet system and piping fitted
¡ All standard, noise-reducing measures
2)
have been fitted
¡ Bellows at the air outlet has been properly acoustically insulated by the enginebuilder
(see Fig.25: Noise insulation, bellows →51)
¡ Bellows between radial air inlet and compressor casing of the high-pressure stage has
been acoustically insulated
The enginebuilder is also responsible for insulating other components such as the charge
air/scavenging air lines and the cooler.
1) Directive 2006/42/EC, 1.7.4.2 / u / Paragraphs 5 + 7:
A-weighted emission sound pressure level
2) The enginebuilder must provide acoustically equivalent measures in case of deviating in-
sulation versions
Page 50 / 114
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