WÄRTSILÄ VASA 6L32, Instruction Manual

Page: 386 / 394

23.8 Maintenance of electrical contacts
To prolong the lifetime of electrical contact surfaces and to provide
proper electrical connection under all conditions and to maintain
a high availability of the WECS system.
The maintenance is carried out by applying contact lubricants
to electrical contact surfaces. For best result the contact surface
should be cleaned with aerosol electrical contact cleaner before
applying the lubricant.
Contact lubricants are specially formulated greases and oils
that reduce friction and enhance the electrical performance of
current carrying metal interfaces in switches and connectors.
They also exhibit a neutral pH thereby avoiding surface corrosion.
Note! Prior to use read the product information.
Warning! To avoid shock or possible fire, disconnect power to any
system before applying conductive lubricant. Insure positive
and negative contacts remain isolated. Improper use can
result in shorting, arcing, or shock.
Wärtsilä recommends to regulary every 2000 - 4000 running
hours or every 6 month maintain the electrical connector contact
surfaces with contact lubricant. The contact treatment greases
listed below can be ordered from Wärtsilä.
The recommended chemicals are:
·
Electrolube SGB20S 20 ml Syringe, part No. 387 022.
This paste is recommend to be used on the contact surfaces
of main electronics connectors and sensor connectors.
Same active substance as SGB200D but in different consis-
tence, i.e. paste instead of aerosol.
·
Electrolube SGB200D 200 ml Aerosol (Flammable),
part No. 387 021.
This spray is recommended to be used on contact surfaces
of main electronic (SMU, DCU, RM, MCU and oil mist
detector) connectors. Since it is an aerosol there are special
requirements of transport handling.
·
Chemtronics CW7100 6.5 g Syringe, part No. 387 023.
This is a heavy duty paste. The electrical conductivity is very
high due to the 100 % silver filled grease, see caution below.
Should be used on problem sensor and power contact surfaces
where SGB grease is not sufficient.
Caution! Care should be taken since this chemical is very conductive and
will cause short-circuit/earth fault if wrongly applied. Must be
placed directly on the contact surface and in very small amounts.
23 Instrumentation and Automation 32-200115/II
23-52 WÄRTSILÄ 32