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Gas Turbine Combustion Instability Transducers

Gas Turbine Combustion Transducers

The Bently Nevada 3500/64M Dynamic Pressure Monitor is specifically designed to monitor combustor pressure pulsations indicative of combustion instabilities ("humming") in gas turbines. Through the use of our 350500 interface module, a variety of pressure transducers* designed for these applications can be used with the 3500/64M.

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Specifications

All Specifications are at 23 °C ± 2 °C, (73.4 °F ± 3.6 °F)

Installation

Install per Installation Drawing 145131 in a safe area or CSA\NRTL\C Class I Division 2, Group A, B, C, or D hazardous area or Class 1 Zone 2 IIC.

Install per Drawing 146821 for Intrinsically Safe Division 1 or Class 1 Zone 0 IIC applications.

350500 Electrical Specifications

Power :

Supply Voltage (at the module) - 19.60 Vdc to – 26 Vdc when no safety barriers are used
-17.75 Vdc to – 26 Vdc when safety barriers are used.
Supply Current 14.68 mA maximum with no load11.69 mA typical with no load

Signal:

Input Sensitivity Ordered option:
13.8 pC/psi (200 pC/bar)
16 pC/psi (232 pC/bar)
1200 pC/psi (17,404 pC/bar)
12 pC/psi (174 pC/bar)
60 pC/psi (870 pC/bar)
Expected Sensor Pole-to-Pole Capacitance for different Input Sensitivities Input Sensitivity Option in pC/psi:
13.8
16
1200
12
60

Nominal Pole-Pole Capacitance in picofarads:
320
60 to 90
6,300
100
300
Output Sensitivity Ordered option:
100 millivolt/psi ( 1.45 Volt/bar)± 2% @ 150 Hz
Dynamic Range ±50 psi pk
Common Mode Rejection -40 dB or better in the passband.
Output Resistance Frequency Response 50 ohm typical
Ordered option: High Low
(See Figure 1)

Physical

Dimensions See figures 3 and 4
Weight 246 grams (8.7 oz)
Mounting Panel mount and 35 mm DIN rail mount options. (See Figures 3 and 4)
Power/Signal Connector and Wiring Three-conductor SpringLoc terminal strip for power, instrument common, and signal output. Accepts wire sizes of: 0.2 mm2 to 1.5 mm2 (16 to 24 AWG) without ferrules, and 0.25 mm2 to 0.75 mm2 (18 to 23 AWG) with ferrules. Recommended field wiring is a three-conductor shielded triad. Maximum length of 305 metre (1000 feet) between the charge amplifier and the monitor.
Sensor Connector Two-pin LEMO EXG.0B.302.HLN
(mates to LEMO FGG.0B.302 or equivalent)

Environmental Limits

Operating Temperature -20 °C to +70 °C (-4 °F to +158 °F)
Storage Temperature -40 °C to + 85 °C (-40 °F to +185 °F)
Operating and Storage Humidity 0% to 95% relative noncondensing

Hazardous Area Approvals

CSA/NRTL/C Class I Division 2, Groups A, B, C, D
Class I Division 1, Groups A, B, C, D
CSA Class I Zone 0 Ex ia IIC T5
Class I Zone 2 Ex nA IIC T5
Europe Zone 0 EEx ia IIC T5
BAS 00ATEX1237X
Zone 2 EEx nA II
BAS 00ATEX3238U
International Ex ia IIC T5
IEC Ex BAS 05.0002
Ex nA II
IEC Ex BAS 05.0003U

145536 Interconnect Cable Specifications

Unless noted otherwise all Specifications are at 23° ±2°C, (73.4°F ±3.6° F)

The 145536 Interconnect Cable is a double shielded, double jacketed, low noise treated, twisted pair cable designed specifically for use with the 350500 DPCA.

Sensor Connector MS3106F-10SL-4S (Mil spec two pin connector)
Charge Amp Connector LEMO FGG.0B.302.CLAD.56 or equivalent
Cable Operating Temperature 150° Celsius maximum (302° F)
Conductor to conductor capacitance 30 pF/ft nominal

145693 Interconnect Cable Specifications

Unless noted otherwise all Specifications are at 23° ±2 °C, (73.4 °F ±3.6 °F)

The 145693 Interconnect Cable is a double shielded, double jacketed, low noise treated, twisted pair cable designed specifically for use with the 350500 DPCA. It can be ordered in lengths from 1 to 15 metres in 1- metre increments.

Sensor Connector M83723/95G10207 (Mil spec two pin connector)
Charge Amp Connector LEMO FGG.0B.302.CLAD.56 or equivalent
Cable Operating Temperature 200 °C maximum (392° F)
Conductor to conductor capacitance 70 pF/ft nominal
Housing Specifications 330181 Housing.
See Data Sheet 141195-01 for Specifications and Ordering Information. This housing is used with 3300 XL Proximitor and can also be used for the 350500.
Up to six (6) DPCA’s can be mounted in panel mount configuration and up to eight (8) in DIN mount configuration.

gas-turb-1

gas-turb-2

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Descriptions English
Gas Turbine Combustion Instability Transducers Datasheet acrobat-reader
ORBIT Gas Turbine Combustion Instability Transducers acrobat-reader


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