Protective Relay Systems

CPS defines a relay as:
A switch that is used to control a circuit or multiple circuits by utilizing low powered signal or signals. There is isolation between the control circuit and the controlled circuit, which allows low voltage wiring and devices to control higher voltage and current devices. There are a variety of purposes, specific functions, mounting styles, operating characteristics, and user customizations available.

  • Assistance in specifying and procuring general purpose and protective relays.
  • Installation in new or existing switchgear.
  • Upgrades to your system to improve safety, performance and accuracy
  • Free estimates on repairs sent to our facility
  • Onsite testing for maintenance
  • Onsite testing for startup & commissioning
  • Coordination studies
  • Reduce Arc-Flash Hazards
  • GE Multilin, Schweitzer, Siprotec, ABB, and all other major manufacturers
  1. General Relay
    1. Design, ratings, construction and operating characteristics make it adaptable to a broad spectrum of applications.
    2. Depending upon construction can be used in ordinary and hazardous locations.
    3. Available in a variety of styles including octal base, square base, flange mounted, miniature, and hermetically sealed.
  2. Protective Relay
    1. In case of a fault or abnormal condition it is designed to initiate a warning signal or initiate disconnecting a portion of an electrical system. This is done for the purpose of protecting certain portions of the electrical system from damage.
    2. As defined by The Institute of Electrical and Electronics Engineers (IEEE) it is “an electric device that is designed to respond to input conditions in a prescribed manner and, after specified conditions are met, to cause contact operation or similar abrupt change in associated electric control circuits.” A note adds further detail: “Inputs are usually electric, but may be mechanical, thermal, or other quantities or a combination of quantities” (IEEE C37.90).
    3. Protective relays can be fix mounted or installed in a draw-out case.
    4. Electro Mechanical, Solid State, and Microprocessor based construction.

Contact Coastal Power Systems for more information on how we can help with all of your General and Protective Relay needs.