ABB A150-M67 Operation Manual page 55

Operation Manual / 4 Product description / A150-M56/66/57/67 -
A155-M..
4 Monitoring operation / 4.1 Oil pressure, oil temperature
4 Monitoring operation
4.1 Oil pressure, oil temperature
Lubricating oil pressure, oil inlet
To limit the oil flow rate through the turbocharger to the admissible values with the engine
at full load, an oil orifice is mandatory or already fitted at the turbocharger oil inlet if the oil
inlet pressure is > 3 bar.
CAUTION
Assuring lubricating oil pressure
Serious damage to the engine or property can result from a missing or insuf-
ficient lubricating oil supply.
The lubricating oil pressure must be monitored during operation and the
u
necessary pressure assured at the oil inlet.
Status for operation
Normal operation
Engine start: Cold oil, admissible for a maximum of 15
minutes
Engine idling, admissible for a maximum of 1 hour
Pre-lubrication and post-lubrication (engine stopped)
Warning signal: (n ≥ 0.5 x n
Alarm signal: Not admissible. Stop the engine immedi-
ately.
Table 5: Lubricating oil pressure at oil inlet before turbocharger
*) Depending on use of an oil orifice in accordance with the enginebuilder's specifications.
For monitoring the lubricating oil pressure, ABB Turbocharging recommends installing a "P"
manometer immediately upstream of the turbocharger oil inlet before the orifice. If the
pressure is controlled electronically, the relevant signals should be triggered at the warning
and alarm values.
© Copyright 2020 ABB. All rights reserved.
)
Bmax
01 Turbocharger contact surface
02 Oil inlet
03 Oil outlet
P Oil pressure measuring point
T Oil temperature measuring point
HZTL4032_EN
Pressure at oil inlet upstream of
the turbocharger
[bar] Overpressure
2.0 < p ≤ 4.5 *)
oil
< 8.0
0.5 < p ≤ 2.5
oil
≤ 1.0
0.5 < p
oil
< 1.25
< 0.6
Rev.P March 2020