Articles by : Brian Haury, PE

• Protecting switch contacts when energizing DC contactors

  Protecting switch contacts when energizing DC contactors Companies often call on Matrix to help solve problems that arise during new installations, normal operations, and/or upgrades. This small case study examines how Matrix engineers helped an energy company investigate the cause of catastrophic damage to switch cont …Read More
  Brian Haury, PE / Control System Upgrade  / Interposing Relay Damage  / Multidiscipline Engineering  / Improvement  / Safety  / Electrical 

• How to Calculate the Short Circuit Current Rating of a Control Panel

  How to Calculate the Short Circuit Current Rating of a Control Panel Failing to calculate the short circuit current rating (SCCR) of a control panel could lead to catastrophe involving damage and injury if the control panel is connected to an electrical system with an available fault current higher than the SCCR of the …Read More
  Brian Haury, PE / Electrical Engineering  / Manufacturing Process Improvement  / National Electrical Code  / Process Design Services  / Safety  / Electrical 

• Circuit Protection: The Difference Between Circuit Breakers and Supplementary Protectors

  Circuit Protection: The Difference Between Circuit Breakers and Supplementary Protectors To ensure safety in manufacturing plants, it’s important to understand the difference between a circuit breaker and a supplementary protector—and the specific applications for each device. Electrical power and control systems r …Read More
  Brian Haury, PE / Electrical Engineering  / Power  / Safety System Design  / Improvement  / Planning  / Safety