Engineered for heavy-duty industrial applications, the LXD63B600H delivers 600A of three-phase protection within the Siemens Sentron family. It mounts into compatible Siemens panelboards, switchboards, and motor control centers to provide reliable power distribution. This LD-frame MCCB features a 100% continuous current rating, requiring 90°C rated wire and lugs for full capacity. It provides 35kAIC at 480VAC with fixed thermal and adjustable magnetic trip settings.
What enclosures or panels accept the LXD63B600H breaker?
This unit-mount, bolt-on breaker is designed for installation in Siemens Sentron panelboards, switchboards, and motor control centers (MCCs) that are configured for LD-frame molded case circuit breakers.
Are line and load lugs included with this Sentron breaker?
No, the B in the LXD63B600H catalog number specifies that it is supplied without lugs. You will need to order properly sized LD-frame terminal lugs separately based on your specific wire material and gauge.
What does the H at the end of the LXD63B600H catalog number represent?
The H indicates that this breaker has a 100 percent continuous current rating. Unlike standard breakers that must be derated to 80 percent, this unit can carry its full 600A load continuously when installed according to code.
What wire temperature rating is required to maintain the 100 percent continuous rating?
To safely utilize the 100 percent continuous current rating, the LXD63B600H must be installed using conductors and terminal lugs rated for 90 degrees Celsius, sized according to 75 degrees Celsius ampacity tables.
Can the trip values be adjusted on the LXD63B600H?
The thermal overload protection is fixed at 600 amps, but the magnetic instantaneous trip is adjustable. The magnetic pickup range can be dialed between 3000A and 6000A to coordinate properly with your electrical system's fault current.
Can the LXD63B600H be reverse fed?
Yes, this thermal-magnetic breaker is UL listed for reverse feed applications. You can terminate the line and load conductors at either end of the breaker based on your specific enclosure layout.
Can I swap out the trip unit on this breaker if my load requirements change?
No, the X in the LXD6 series catalog number indicates that this breaker comes fully assembled with a non-interchangeable trip unit. If your system requires a different amperage rating, you must replace the entire breaker.
What is the standard ambient temperature calibration for this unit?
The internal thermal-magnetic trip unit is calibrated for standard 40 degrees Celsius (104 degrees Fahrenheit) operation. Operating the breaker in higher ambient temperatures without proper derating calculations may lead to nuisance tripping.
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