A heavy-duty solution for commercial facilities, the Siemens HHFD63B225 is a 3-pole, 225A MCCB providing essential overcurrent mitigation. This FD frame breaker utilizes a unit-mount design for integration into Siemens Sentron enclosures. Modern upgrades utilize the 3VA5222-7EC31-0AA0 substitute, requiring a specific retrofit kit for panelboard mounting. Featuring extra-high interrupting capacity, it achieves 100 kAIC at 480VAC with fixed thermal and adjustable magnetic trip settings.
HACR Rated, Current Limiting, Extra High Interrupting Capacity, Interchangeable Trip Unit
Product FAQs
5 answers
What panelboards are compatible with the HHFD63B225?
This FD-frame breaker is designed for installation in Siemens Sentron P1, P2, and P3 panelboards, as well as compatible switchboards and motor control centers.
What lug kit is used with the HHFD63B225?
The standard line and load lug kit for this 225A breaker is the TA1FD350A. It accepts 6 AWG to 350 kcmil copper or aluminum wire.
What is the magnetic trip adjustment range for this 225A breaker?
The instantaneous magnetic trip on the HHFD63B225 can be adjusted from 1100A to 2500A, allowing you to fine-tune protection and improve system coordination.
Can the Siemens HHFD63B225 be reverse fed?
Yes, Siemens FD-frame thermal-magnetic molded case circuit breakers are suitable for reverse feed applications.
What is the difference between the HFD63B225 and the HHFD63B225?
The difference lies in their interrupting capacity. The HFD63B225 is rated for 65kAIC at 480VAC, while the HHFD63B225 features an extra-high interrupting capacity of 100kAIC at 480VAC.
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