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  • Users: climb1
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  1. climb1

    UHV and EHV circuit breaker

    Having a debate; Is there a difference between pre-insertion resistors and closing resistors in circuit breakers? It seems as though most manufacturers are relying more on switch sync devices instead of any mechanical resistors (pre-insertion or closing) for 345 and 500 breakers. Without...
  2. climb1

    tin plating corrosion

    i have an aluminum block that is tin plated. starting to show signs of white corrosion. i have been told that it is normal for tin plating to show corrosion based on environmental conditions. two questions: 1. can anyone confirm or deny that tin plating can corrode? 2. is there an easy test, i...
  3. climb1

    Gas CB Testing

    We are Doble testing a gas CB for power factor. We are getting a 'bad' result on one of the bushings at full pressure. All of the others are getting 'good' ratings. When we take the pressure down to 5psi, it passes. We are getting a new tank of gas from the manufacturer. Has anyone run into...

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