The Siemens LD63B600 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 600 Amps and a voltage rating of 600V. It has an interrupting rating of 35kAIC at 480V. The LD63B600 has a bolt-on connection type and includes long time and instantaneous trip functions.
Interchangeable Trip Unit, HACR Rated, Reverse Feed
Product FAQs
8 answers
What panelboards are compatible with the Siemens LD63B600?
This 600A breaker is designed for use in Siemens Sentron panelboards, specifically Type S1, S2, and SE, as well as compatible Siemens switchboards and enclosures.
Does the LD63B600 come with lugs, and what wire sizes do they accept?
Yes, the standard LD63B600 includes line and load lugs, typically part number TA2J6500. These lugs accept two conductors per phase, ranging from 3/0 AWG to 500 kcmil copper or aluminum wire.
Can the Siemens LD63B600 be reverse fed?
Yes, as a standard thermal magnetic molded case circuit breaker, the LD63B600 is suitable for reverse feed applications.
How should the LD63B600 be wired for 500VDC applications?
When applying this three pole breaker on 500VDC systems, the power supply must be connected in a series or zig-zag configuration across the poles to ensure proper arc interruption. Always consult the manufacturer wiring diagrams for DC applications.
What does the adjustable magnetic trip function do on this breaker?
The adjustable magnetic trip allows you to set the instantaneous short-circuit pickup point, which ranges from 3000A to 6000A for this 600A frame. This helps coordinate with downstream breakers or handle high motor inrush currents without nuisance tripping.
Is the trip unit on the LD63B600 interchangeable?
Yes, the LD63B600 features an interchangeable thermal magnetic trip unit, catalog number LD63T600. This allows the trip unit to be replaced or upgraded without replacing the entire breaker frame.
What is the difference between the LD63B600 and the HLD63B600?
The LD63B600 is the standard interrupting capacity version, rated at 25kAIC at 600VAC and 35kAIC at 480VAC. The HLD63B600 is the high interrupting capacity version, offering higher fault current ratings for more demanding applications.
What does the B in the LD63B600 catalog number indicate?
The B indicates that this is a complete breaker assembly that includes the frame, trip unit, and lugs. For comparison, the LD63F600 is the frame only, and the LD63T600 is the trip unit only.
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