PO Box 2087          Forest Park, GA 30298

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Phone: 800 735 0416          email: sales@demico.com

Design and Manufacture of Innovative Electronic Instruments and Controls for the Power and Gas Utilities Since 1978

Battery GroundTransducer

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APPLICATIONS

  • DETECT AND TROUBLESHOOT BATTERY POWER  TERMINAL SHORTS TO EARTH GROUND
  • REMOTELY MONITORS ELECTRICAL SUBSTATION LEAD ACID BATTERIES AND CHARGERS.
  • DETECT DEFECTIVE BATTERIES, CHARGERS, AND WIRING WITH CONTINUOUS MONITORING.

The Demico Battery Ground Transducer is a unique dual function transducer which incorporates the functionality of both versions of our BA series Battery Transducer as well as a completely new function monitoring the battery to earth ground isolation.

Standard practice in SCADA systems is to keep the Battery power system isolated from the earth grounded AC power system. Failure to maintain isolation can result in incorrect or unstable readings from sensors, malfunctioning controls, or even damage to equipment. Causes can be errors in wiring, insulation breakdown, or even equipment design. Now the Battery Ground Transducer can alert the SCADA system when the problem first occurs, and when it is corrected.

This transducer is powered from the battery it is monitoring, eliminating the need for an additional power source.  A simple resistor from 0 to 10,000 ohms is all that is required to scale and interface to a standard RTU analog input. The transducer outputs’ galvanic isolation from the battery eliminates ground loops and ground referenced noise.

Two switch selectable output options are included for the Battery Voltage output. A slide switch next to the terminal block selects either the linear output like our BA_11 series, or offset linear output like our BA_12 series. See the output charts and graphs at the links for the individual models in the chart below.

The Battery Ground output is a bipolar current source. If the positive terminal of the battery is the source of the Battery power to earth ground leakage, then the current output will be positive 0 - 1mA. If the negative terminal of the battery is the source of the Battery power to earth ground leakage, the current output will be negative 0 - 1mA

The microcomputer based circuitry is stable across the specified operating range.

Model

Input

Output Graph

Price

BG11

7.5 - 15Vdc

BG11

$  600.00

BG21

15 - 30Vdc

BG21

$  600.00

BG31

30 - 60Vdc

BG31

$  600.00

BG41

75 - 150Vdc

BG41

$  600.00