Related Manuals for GE DB Series
Summarization of Contents
Introduction to Ammeters and Voltmeters
Scope of AB and DB Ammeters and Voltmeters
Covers installation of General Electric Types AB and DB a-c and d-c ammeters and voltmeters.
Instrument Nameplate Details
Details information found on the instrument nameplate, including serial number and ratings.
Transformer-Supplied Instrument Calibration
Explains scale calibration for ammeters and voltmeters supplied with transformers.
A-C Ammeter Usage
Guidelines for using a-c ammeters, including requirements for current transformers.
A-C Voltmeter Usage
Guidelines for using a-c voltmeters, including potential transformer requirements.
D-C Ammeter Specifications and Safety
D-C Ammeter Safety Precautions
Safety advice for d-c ammeters, especially regarding grounding and line potential.
D-C Ammeter Lead Resistance Adjustment
Procedure for adjusting d-c ammeters for non-standard shunt lead resistances using a rheostat.
D-C Voltmeter Information
D-C Voltmeter Application
Information on d-c voltmeters used on circuits above 750 volts and ground detectors.
Instrument Installation Procedures
Switchboard Drilling and Mounting
Instructions for drilling switchboards and mounting instruments using provided studs.
Instrument Placement and Stray Fields
Advises on positioning instruments away from transformers and heavy current wires.
Zero Adjustment Procedure
How to adjust the instrument pointer to zero when the instrument is leveled and not in use.
Terminal Connections Overview
Detailed instructions for making terminal connections, ensuring clean contacts and proper tightening.
Operational Principles and Grounding
Polarity Markings of Transformers
Explains polarity markings on transformers for correct connections.
Grounding Cases of A-C Instruments
Guidance on grounding cases of a-c instruments used with transformers.
Principles of Operation for DC Instruments
Describes the d-c instruments' permanent-magnet, moving-coil mechanism.
Principles of Operation for AC Instruments
Explains the moving iron mechanism and electrodynamometer for a-c instruments.
Dimension Data for Instrument Types
Dimensions of Types AB-14, -15, -19 and DB-14, -15, -19
Provides dimensional data for specific Types AB and DB ammeters and voltmeters.
Dimension Data for AB-16 and DB-16
Dimensions of Types AB-16 and DB-16
Provides dimensional data for Types AB-16 and DB-16 ammeters, voltmeters, and ground detectors.
Dimension Data for AB-18 and DB-18
Dimensions of Types AB-18 and DB-18
Provides dimensional data for Types AB-18 and DB-18 ammeters, voltmeters, and ground detectors.
DC Connection Diagrams
Self-Contained DC Ammeter Connection
Diagram for connecting a self-contained d-c ammeter.
DC Ammeter with External Shunt Connection
Diagram for connecting a d-c ammeter with an external shunt.
Double-Rated DC Ammeter Connections
Diagrams for low and high range connections of double-rated d-c ammeters.
DC Voltmeter Connections
Diagrams for self-contained d-c voltmeters and those with external resistors.
DC Ground Detector Connection
Diagram for connecting a d-c ground detector with an external resistor.
AC Connection Diagrams
Self-Contained AC Ammeter Connection
Diagram for connecting a self-contained a-c ammeter.
AC Ammeter with Current Transformer
Diagrams for connecting a-c ammeters with current transformers.
Double-Rated AC Ammeter Connections
Diagrams for low and high range connections of double-rated a-c ammeters.
Self-Contained AC Voltmeter Connection
Diagram for connecting a self-contained a-c voltmeter.
AC Voltmeter with External Resistor/Transformer
Diagrams for a-c voltmeters with external resistors or potential transformers.
Form-15 Shunt Dimensions
Dimensions of Form-15 Shunts
Provides dimensional data for Form-15 shunts, 75 to 10,000 amperes.
Apparatus Service and Sales Offices
Apparatus Service Shops
List of General Electric service shops across various locations.
Apparatus Sales Offices
List of General Electric sales offices across various locations.
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