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| SWARTZ® WATT TRANSDUCER
 PDF Cutsheet
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(Click on image for enlarged view) |
The SWARTZ® Watt Transducer is a high
performance, solid-state unit specifically developed to meet requirements for supervisory
control and data acquistion (SCADA) systems. The transducer is ruggedly constructed for
the transit substation environment and operates from DC "housekeeping" battery
supplies without use of separate AC inverters. |
 | "Power on" LED |
| Four quadrant multiplier |
| Overrange capability |
| Smooth saturation characteristics at range limits |
| High bandwidth to 1 khz |
| Bi-Directional |
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| Internal Power Supply operates on and auto-compensates for a wide range of DC inputs |
| Magnetic link design; no aging deficiencies or temperature drift |
| Three-way isolation: power supply, input circuit, and output circuit |
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The Watt Transducer is constructed on a flanged base and may be mounted in
any orientation. Electrical connection is via screw terminal barrier strips.
"Gain" and "Zero" adjustment trimpots are located on the top cover for
calibration or for setting intentional offsets. Voltage and current are multiplied in the
high voltage section for highest accuracy and the watts output is fed to a full wave FET
chopper that provides high voltage isolation between feeder circuits and current loop
output. The output is a bi-polar current source and tracks the input signal with current
feedback located in the positive output for best performance.
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| Input Power: Operates on 24-125VDC |
| Supply Current:40 mA at 125 VDC, 200 mA at
24 VDC |
| Ambient Temperature:-20°C to +55°C |
| Design Test:SWC ANSI/IEEE C37.90 |
| Input Dielectric:3700 VDC, 60 Hz, 1min. |
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| Input Impedance: 2 M ohms |
| Output:-2 to +2 mA |
| Output load impedance:Up to 10K ohms |
| Accuracy at 25°C: + .5% fs |
| Temperature effect:+ .15% per °C |
| Scale Factors:0-1000 VDC = 0-1 mA, 0-50 mV
= 0-1 mA |
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| Interface Diagram
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Relay Case Dimensions
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