Built to protect circuits against overloads and short circuits, the Siemens FD62F250 is a 2-pole Sentron molded case circuit breaker. It has a rated current of 250A, rated voltage of 600VAC and interrupting rating of 35kA at 480V. Thermal magnetic tripping provides long-time and instantaneous protection. It has line and load lugs and UL and IEC approvals.
When should I choose the Siemens FD62F250 for a single-phase circuit?
Its 2-pole, single-phase configuration suits circuits requiring protection of two conductors. Use the pole count and phase configuration to match the circuit's protection requirements.
How do I apply the 35 kA interrupting rating at 480 V?
At 480 V, the breaker has a 35 kA interrupting rating. For selection at that voltage, the available fault current at the installation point must not exceed 35 kA.
How does the thermal-magnetic LI trip protect the circuit?
The thermal-magnetic trip combines long-time overload protection with instantaneous response to short-circuit current. Long-time protection allows a delayed response to overloads, while instantaneous protection responds rapidly to high fault current.
How are incoming and outgoing conductors terminated?
The breaker has line and load lugs for conductor termination on both sides. Connect incoming power conductors to the line lugs and outgoing circuit conductors to the load lugs.
What conductor materials and sizes can I use at the terminals?
The conductor range is 6 AWG through 350 KCM for copper and 4 AWG through 350 KCM for aluminum. Check both conductor material and size when selecting conductors for the terminals.
What dimensions should I use when planning installation space?
The breaker measures 9.5 in high, 4.5 in wide and 4 in deep. Use these dimensions to plan the breaker footprint and conductor routing space.
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