Find Protective Relays for 3 Phase 120/208 Volt Generator System

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SUMMARY

The discussion focuses on sourcing protective relays for a 3-phase 120/208 volt generator system, emphasizing the need for modern relays without electromechanical outputs due to longevity concerns. Key specifications include adjustable trip and automatic reset times, with functionalities for overvoltage, undervoltage, overfrequency, underfrequency, loss of phase, and overcurrent. Participants recommend contacting suppliers for tailored advice and relay recommendations, particularly those that integrate multiple protective functions.

PREREQUISITES
  • Understanding of 3-phase electrical systems
  • Familiarity with protective relay specifications
  • Knowledge of electrical fault conditions (overvoltage, undervoltage, etc.)
  • Experience with relay manufacturers and product literature
NEXT STEPS
  • Research modern protective relays that meet 3-phase 120/208 volt specifications
  • Learn about adjustable trip and reset time configurations in relays
  • Investigate relay manufacturers that offer integrated protective functions
  • Contact suppliers for recommendations on durable relay options
USEFUL FOR

Electrical engineers, generator system designers, and maintenance professionals seeking reliable protective solutions for 3-phase systems.

Josh111
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I am trying to get the necessary protective relays for my generator system and I do not want to use relays with a electromechanical output relay as this does not last as long. I am trying to locate these and am having some trouble with it. Is there anyone who knows about this?
The following relays will need the following specs:
3 phase 120/208 volt system prefer no coil voltage necessary but 12/24 volt if necessary.
Adlustable trip time and adjustable automatic reset time. Need two poles each that open on fault.
Overvoltage
Undervoltage
Overfrequency
Underfrequency
Loss of phase
Overcurrent
 
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Modern relays often combine several of those functions in one relay. For example: https://cdn.selinc.com/assets/Literature/Product%20Literature/Data%20Sheets/710_DS_20190508.pdf?v=20190614-202607

You should contact your suppliers, explain your concern about lifetimes, and listen to their recommendations.
 

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