The Siemens HHFD63F250 is a circuit breaker frame with a 250A frame amperage and a 600VAC voltage rating. This 3-pole frame has an interrupting rating of 100kAIC at 480V. It belongs to the Sentron series and uses the HHFD physical frame. Mounting is bolt-on. The operating temperature range is 40 °C, and the weight is 7.65 lb. This listing is the frame only. A compatible trip unit is required and is not included.
What does the 250A frame rating mean for the Siemens HHFD63F250?
The 250A rating describes the frame amperage class. Use this rating when selecting the frame size for a circuit breaker assembly.
How should I use the 600VAC voltage rating when selecting this frame?
The 600VAC rating sets the voltage limit for selection on an AC system. Select it for a system voltage at or below that rating, and evaluate the interrupting rating separately at the operating voltage.
How do I evaluate the 100kAIC interrupting rating at 480V?
At 480V, the interrupting rating is 100kAIC. Compare that rating with the available fault current at the installation point; the interrupting rating must be at least as high as the available fault current.
What does bolt-on mounting mean for installation?
Bolt-on mounting uses bolted fastening for installation. Plan for a bolted installation rather than a plug-in mounting method.
When should I choose a 3-pole circuit breaker frame?
Choose a 3-pole frame when the circuit breaker assembly needs to interrupt three circuit conductors together. Pole count should match the circuit's switching and protection requirements.
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