The Westinghouse HLB3400F is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of up to 400 Amps and a voltage rating of 600V. It has an interrupting rating of 35kAIC@480V. The HLB3400F has a bolt-on connection type and includes long time and instantaneous trip functions.
Trip unit sold separately. Please contact a representative for assistance on a complete assembly.
What trip units are compatible with the Westinghouse HLB3400F frame?
The HLB3400F requires a separate interchangeable thermal-magnetic trip unit. It accepts Westinghouse, Cutler-Hammer, or Eaton HLB-series trip units, such as the HLB3400T, HLB3300T, or HLB3200T, ranging from 100A up to the frame's 400A maximum capacity.
Are terminal lugs included with the HLB3400F circuit breaker frame?
No, the HLB3400F is a frame-only unit. Terminal lugs, such as the T400DA2 for LB frames, and the trip unit must be sourced separately to complete the assembly.
Can I use an Eaton or Cutler-Hammer trip unit in this Westinghouse frame?
Yes. Eaton acquired the Westinghouse distribution equipment line and continued manufacturing these components under the Cutler-Hammer and Eaton brands. An Eaton or Cutler-Hammer LB-frame trip unit of the correct amperage is fully compatible with this Westinghouse frame.
What does the F signify in the HLB3400F catalog number?
The F indicates that this catalog number is for the breaker frame only. It does not include the thermal-magnetic trip unit or terminal lugs, which are required for a complete and functional circuit breaker.
Does the HLB3400F frame mount directly into standard panelboards?
The HLB3400F features a bolt-on connection designed for legacy Westinghouse, Cutler-Hammer, and Eaton switchboards and panelboards that accept LB-frame breakers. Verify your specific panel busbar configuration and mounting hardware requirements before installation.
Is the Westinghouse HLB3400F still manufactured?
Westinghouse-branded circuit breakers are obsolete, as the line was acquired by Eaton. However, Eaton continues to support this footprint with Cutler-Hammer branded replacements and interchangeable components for legacy panelboards and switchboards.
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