Turbo Supervisory InstrumentsVOLUME-1

Installation adjustments for STG IIIA

SATYA1/3/2012

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INSTRUMENTS:

Each and Every bearing has: a) Two bearing metal temperatures.b) One seismic sensor

c) Two non contact vibration probes.

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Speed probes which are installed in front pedestal:

ADJUSTED GAP:

1st speed probe adjustment: 0.8mm

2nd speed probe adjustment: 0.8mm

3rd speed probe adjustment: 0.8mm

4th speed probe adjustment: 0.8mm

5th zero speed probe adjustment: 1mm, Resistance: 27 Ω

6th zero speed probe adjustment: 1mm, Resistance: 26.4 Ω

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Connections:

1st, 2nd, 3rd probes for DEH over speed probes these are directly connected to DEH panel.4th probe for local Digital display.5th, 6th zero speed probes.

Keyphsor and Eccentricity:

Keyphsor Eccentricity

ADJUSTMENTS:

a) Keyphsor sensor: 1mm b) Eccentricity: -10.5Vdc

Range 0 to 500μm

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LP differential Expansion probes:

Note: probe resistance: 7Ω

a) Left hand side probe adjusted 12mm away from shaft ring.b) Right hand side probe adjusted 42mm away from shaft ring.c) Shaft ring thickness 57mm. d) Total gap between probes is 111mm.e) Voltage noted for the adjustment: LPDE1 : -6.58mV,

LPDE2: -18.28mVf) Location near bearing No. 4.

LPDE sensor connected to

3300XL 50mm Proximitor sensor

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9 Meters, Part No. 330878 -90-000.39(V/mm) or (10mV/mil)

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AXIAL POSITION PROBE:

Axial position (L) Radial vibrations (L)

Radial vibrations (R) axial position(R)

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Adjustment:

Thrust or axial position: -10Vdc

ALL vibrations probes: -10.5Vdc

Axial position sensor connected to

3300XL 11mm Proximitor sensor 9 Meters, Part No. 330780 -90-003.94(V/mm) or (100mV/mil)

HP differential Expansion probes:

It is installed on bearing No.2.

Gap Adjustment from Shaft: 12mm

It connected to

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BENTLY NEVADA PANEL COMPONENTS USED:

1) 3500/15 AC power supply- 22) 3500/22M Transient date interface -13) 3500/25 Keyphasor-14) 3500/53 Over Speed Detection module-35) 3500/50 Tachometer Module6) 3500/42M Proximitor/ SEISIMIC Monitor -67) 3500/45 Position Monitor-18) 3500/33 16-channel relay module -2

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One Keyphsor One Eccentricity LPDE near 4Th bearing HPDE near 2nd bearing CASE EXPANSION near 2ND bearing Three OVER SPEED for DEH near 1st bearing Three Speed Probes for TSI Two ZERO speed probes Two Axial probes