Vibration Transducer Interface

Transcription

1 Vibration Transducer Interface Description The Vibration Transducer Interface (VTI) is a galvanic isolation solution provided by GE s Bently Nevada product line. With the use of galvanic isolation, an earth ground is not required in the hazardous area. Isolating transformers used in the galvanic isolation technique provide a physical barrier to prevent high voltages from being transferred from the safe area to the hazardous area. The safe area and hazardous area are isolated from each other, and can have two separate grounding points without the possibility of ground loops occurring. The Vibration Transducer Interface has been designed, engineered, and manufactured by Measurement Technology Limited to our design specifications. The Vibration Transducer Interface incorporates three-port isolation. The transducer, monitor, and power supply circuits each have separate grounding points, since the three circuits are isolated from each other. Therefore, +24 Vdc plant power, with its own ground, can be used to provide power to the Vibration Transducer Interface without creating ground loops. With the use of our1800/10 power supplies, 110 Vac or 220 Vac can also be used to power the Vibration Transducer Interface. Two power supplies can be installed in one housing. The following Bently Nevada transducer systems can be used with the Vibration Transducer Interface: 3300 XL Proximity Transducer System mm/8 mm Proximity Transducer System mm/8 mm Proximity Transducer PROXPAC Accelerometer Accelerometer Interface Module (part number ) Aeroderivative Interface Module (part number 86517) 3300 REBAM MicroPROX Proximity Transducer System 7200 REBAM MicroPROX Proximity Transducer System Page 1 of 8

2 The following Bently Nevada monitors can be used with the Vibration Transducer Interface: 3500/25 Keyphasor Monitor 3500/40 Proximitor Monitor 3500/42 Proximitor /Seismic Monitor 3500/44 Aeroderivative Monitor 3500/45 Differential Expansion/ Thrust Position Monitor 3500/50 Tachometer Monitor 3500/53 Overspeed Protection System 3300/16 Dual Vibration Monitor 3300/20 Dual Thrust Monitor 3300/25 Dual Accelerometer Monitor 3300/26 Dual Accelerometer RMS Monitor 3300/50 Tachometer 3300/52 Reverse Rotation Monitor 3300/53 Overspeed Protection System 3300/54 Dual REBAM Monitor 3300/61 Dual Vector Monitor 3300/81 Six-channel Rod Drop Monitor 3300/95 Aeroderivative Filter Module/Vibration Monitor 2201/02 System Monitor 2201/03 Four-channel PLC Monitor 2201/06 Low Speed Machine Monitor Page 2 of 8

3 Specifications Electrical Supply Voltage (Vs): Power Requirements, Vs: Isolation: Power Dissipation Within Unit: Minimum Transducer Supply Voltage (Terminals 2 and 6) Versus Load Current: Max Cross-Talk Noise Between Adjacent Isolators: The following specifications apply at 20 C (68 F) for one channel, unless otherwise noted, the temperature coefficient is 50 ppm/ C (+10 C to +65 C) and 100 ppm/ C (-20 C to +10 C). +20 Vdc to +35 Vdc. 88 ma at +20 Vdc, 80 ma at +24 Vdc, 63 ma at +35 Vdc. 250 Vac between input, power, and output circuits. 1.7 W Vdc at 12 ma, Vdc at 15 ma, Vdc at 22 ma. 11.3mV peak-to-peak (4mv RMS). Signal Range (Terminals 5 and 6, 7 and 8): Signal Input Impedance (Terminals 5 and 6): Signal Output Impedance (Terminals 7 and 8): DC Transfer Error: AC Transfer Error: Voltage Bandwidth: Phase Delay: Line Fault Detection: -20 Vdc to -0.5 Vdc. 10K Ω -1%, +2%. 20 Ω. ± 100 mv. ± 1% from 0 to 1 khz; -5% to +1% from 1 to 10 khz; -10% to +1% from 10 to 20 khz. -3 db at 43 khz (typical). Less than 14 µ sec, equivalent to: -1 degree at 200 Hz; -3 degrees at 600 Hz; -5 degrees at 1 khz; -50 degrees at 10 khz; -100 degrees at 20 khz. If signal input line breaks (opens), signal output drops to approximately 0V. Page 3 of 8

4 Monitor Leadwire Length: Transducer Leadwire Length: LED Indicators: Safety Description Terminals 2 to 4: Terminals 5 to 6: Hazardous Area Classifications: 30 metres (100 feet) maximum between monitor and Vibration Transducer Interface. For all applicable transducer systems: 305 metres (1000 feet) maximum between transducer module and Vibration Transducer Interface. The capacitance, inductance, and L/R parameters of the cable must be appropriate for the hazardous area classification. One green LED on top of module indicating power to module and two green LEDs on backplane indicating power sources are available V, 94 ma, 0.66 W. Non-energy-storing apparatus; 1.2 V, 0.1 A, 20 µj, and 25 mw. Approvals for hazardous areas for all compatible transducer systems are certified by BASEEFA / CENELEC for Zone 0, IIC, T4-6 except the Aeroderivative Interface Module, which is approved by SIRA /CENELEC for Zone 1, IIC, T4. Environmental Limits Operating Temperature: Storage Temperature: Relative Humidity: Enclosure Base: Lid: Finish Base: Lid: Lid fasteners: Protection: Permitted location: Ambient temperature limits: -20 C to + 65 C (-4 F to F). -40 C to +80 C (-40 F to +176 F). To 95%, noncondensing. GRP (glass-fiber-reinforced polycarbonate). Transparent high-strength polyester. Light gray. Transparent. Captive screws Dust-tight and water-jet proof to IEC529: IP65 Safe area. -20 C to +50 C (-4 F to +122 F), typical. Page 4 of 8

5 Ordering Information Note: When 3300 or 2201 monitors are ordered for use with the Vibration Transducer Interface, the monitors must be configured for no barriers. The 3500 monitors are configured for use with the Vibration Transducer Interface using the 3500/01 Rack Configuration Software. Vibration Transducer Interface AXX-BXX-CXX-DXX-EXX-FXX-GXX-HXX-IXX A: Housing Option 0 0 No housing required 0 1 With housing B: Position 1 Module C: Position 2 Module D: Position 3 Module E: Position 4 Module F: Position 5 Module G: Position 6 Module H: Position 7 Module I: Position 8 Module Power Supply (1800/10) AXX-BXX-CXX-DXX A Housing Option 0 0 No housing required 0 1 With housing B: Input Voltage to 135 Vac to 255 Vac C: Agency Approval 0 0 No Approvals D: Number of Power Supplies 0 1 One 0 2 Two Accessories Spares Power supply fuse. One fuse is installed in the backplane when it is shipped. MTL 4031 Isolator Page 5 of 8

6 Field wiring diagram Vibration Transducer Interface Figure 1: Vibration Transducer Interface Terminals Figure 2: Vibration Transducer Interface Dimensions are in millimetres (inches) Page 6 of 8

7 Figure 3: Vibration Transducer Interface Housing (also for use with power supplies) Dimensions are in millimetres (inches) Page 7 of 8

8 Figure 4: Vibration Transducer Interface Power Supply Dimensions are in millimetres (inches) Bently Nevada, PROXPAC, MicroPROX, Keyphasor, Proximitor and REBAM are trademarks of General Electric Company. Copyright Bently Nevada LLC Bently Parkway South, Minden, Nevada USA Phone: Fax: All rights reserved. Page 8 of 8