3UA/UC Thermal Overload Relay

3UA/UC Thermal Overload Relay

The 3UA / 3UC thermal overload relays are suitable for customers from all industries, who want guaranteed optimum inverse time delayed protection of their electrical loads. The relays meet the requirements of IS/IEC 60947-4-1. They also offer protection against single phasing and unbalanced currents.

 

These relays are widely used in electrical industry for reliable overload protection.

Applications

  • 3UA5/6 are 3 pole adjustable bi-metal overload relays mainly suitable for normal starting applications. They provide accurate and reliable protection to motors against overload as per CLASS 10A.
  • 3UC overload relay: 3UC5/6 are 3 pole adjustable, saturable CT operated bi-metal overload relays mainly suitable for heavy starting applications (They provide accurate and reliable protection to motors against overload as per CLASS 30.

Range

  • 3UA5: 0.1 to 120A, (Class 10A, without CT)
  • 3UA6: 85 to 630A, (Class 10A, CT operated)
  • 3UC5/6: 2.4 to 400A (Class 30, CT operated)