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VR63-4 and VR63-4UL Instruction Manual, Rev J, English
This instruction manual provides operation, installation, maintenance, and troubleshooting information for the VR63-4/UL Voltage Regulator, including voltage regulation, frequency compensation, overexcitation shutdown protection, field flashing, system startup, and adjustment procedures for brushless generators.
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Technical Paper: Zero-Sequence Circuit of Three-Legged Core Type Transformers
Modified zero-sequence equivalent circuit for a three-legged core-type transformer.
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Technical Paper: Zero-Sequence Impedance of Overhead Transmission Lines
Transmission-line impedances, centering on zero-sequence impedances.
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Technical Paper: A Derivation of Symmetrical Component Theory and Symmetrical Component Networks
Review symmetrical component analysis.
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BE350 Bulletin, Rev 8, English
This product bulletin provides an overview of the features, benefits, specifications, and configuration options of the BE350 Voltage Regulator.
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Technical Paper: Solutions for Unconventional Connection of Transformer Differential Current Transformers
Analyzing unconventional current-transformer polarity connections and how to obtain the right connection to achieve the desired direction of operation or polarity.
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BE350 Instruction Manual, Rev D, English
This instruction manual provides installation, operation, and adjustment information for the BE350 Analog Voltage Controller. It covers voltage regulation functions, operating controls, frequency compensation, installation requirements, startup procedures, and technical specifications.
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Technical Paper: A Review of System-Grounding Methods and Zero-Sequence Current Sources
Grounding methods, sources of ground current, ground-current flow in the power system, and how each impacts protective relaying.