Portable Phase Angle Meter from 1924 Silent Sentinels
Silent Sentinels 1924 Excerpt #16 This excerpt from the 1924 version of Silent Sentinels discusses how engineers used a phase angle meter in the early days of the electrical system. What differences can you spot when compared to the phase angle meters used today? This is the 16th in the series.
Instrument Transformers from 1924 Silent Sentinels
Silent Sentinels 1924 Excerpt #17 This excerpt from the 1924 version of Silent Sentinels discusses how engineers applied instrument transformers in the early days of the electrical system. What differences can you spot when compared to the instrument transformers used today? This is the final excerpt in the series. Follow these links to
Auxiliary Relays from 1924 Silent Sentinels
Silent Sentinels 1924 Excerpt #15 This excerpt from the 1924 version of Silent Sentinels discusses the most common auxiliary relays used in the early days of electrical systems. This is the 15th in the series. Follow these links to learn more about this series and the 1924 version of Silent Sentinels.
Temperature Relays from 1924 Silent Sentinels
Silent Sentinels 1924 Excerpt #14 This excerpt from the 1924 version of Silent Sentinels discusses the most common temperature relays used in the early days of electrical systems. This is the 14th in the series. Follow these links to learn more about this series and the 1924 version of Silent Sentinels.
Direct-Current Relays from 1924 Silent Sentinels
Silent Sentinels 1924 Excerpt #13 This excerpt from the 1924 version of Silent Sentinels discusses the direct-current relays used in the early days of electrical systems. This is the 13th in the series. Follow these links to learn more about this series and the 1924 version of Silent Sentinels. Westinghouse Protective and
Westinghouse Protective and Control Relays from 1924 Silent Sentinels
Silent Sentinels 1924 Excerpt #12 This excerpt from the 1924 version of Silent Sentinels lists the protective and control relays used in the early days of electrical systems. This is the 12th in the series. Follow these links to learn more about this series and the 1924 version of Silent Sentinels.