ANSI solid state, undervoltage relay Type 27H

Solid state relay, high speed, designed for distribution systems

Circuit-Shield Voltage Relays provide a wide range of protective functions, including undervoltage protection of motors, overvoltage protection, and automatic bus transfer. Inherently high seismic and transient immunity allow the use of these relays in generating stations or substations where the performance of electro-mechanical or other types of static relays is marginal.

Typical applications of 27H relay include instantaneous undervoltage detection for bus transfer schemes, and for generator intertie schemes. The low range relay is used as a residual voltage detector in motor bus transfer schemes. 

Why ABB?

  • Reducing operating costs
  • On-site/Retrofits - Existing panels can be modified and retrofitted at the customer’s site.
  • System installation at the customers site
  • Relays are tested at the customer site.
  • Assisting our clients in modeling their power system

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