Field Wiring - GE Bently Nevada 86517 Operation Manual

Accelerometer Interface Module Operation Manual
Accelerometer
If you are installing the Bently Nevada accelerometer (P/N 45357-01) then follow
these directions:
Contact the turbine manufacturer or your original equipment manufacturer (OEM)
for instructions on mounting the accelerometer. The correct mounting location
and mounting structures, such as brackets and fasteners, are critical to the
performance of the transducer system.
The accelerometer can be mounted in any orientation as long as its sensitive axis
(indicated by arrow on side of accelerometer) is 90 degrees to the axis of the
rotor. Four mounting holes should be drilled for 1/4 inch (6 mm) bolts at the
corners of a 1.188 inch (30.18 mm) square. The mounting holes should be
perpendicular to the mounting surface and the mounting surface must be flat
and smooth. The mounting structure must also be rigid and have no mechanical
resonances within the frequency range of interest.
Connect and safety wire the extension cable to the accelerometer.
Hazardous Area Considerations
The accelerometer interface module agency approvals are "entity" approvals. This
means that each component, or entity, of the transducer system must be certified
for the overall system to meet certification requirements. When specifying an
agency certified system you should verify that both the interface module and
accelerometer have the appropriate hazardous area certification. The Bently
Nevada accelerometer, part number 45357-01, is certified for use in Class I,
Divisions 1 and 2 by the Canadian Standards Association.
When installing a CENELEC approved system you must attach a system cable tag
to the interface module field wire, refer to Drawing 141110 in the appendix. The
tag is shipped in a plastic bag attached to the interface module. Attach the tag to
the power field wire near the safety barrier using the adhesive backing. Protect
the label using the piece of transparent heat shrink tubing supplied with the tag.

3.3 Field Wiring

You must supply the field wiring from the interface module to the monitor unless
you specifically request that Bently Nevada Corporation provide it. The 86517
interface module is intended to be used with the 3300/95 Filter Module/Vibration
Monitor but may also be connected to certain specially modified 3300 series
monitors such as the 3300/15 and 3300/25. Figure 2.2 shows the wiring
connections to a 3300/95 monitor without barriers and Figure 2.3 shows the
wiring connections to a 3300/15 (or equivalent) without barriers. Figures 2.4 and
2.5 show connections for Division 1/Zone 1 installations when external safety
barriers are used.
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