EATON FD3125 Molded Case Circuit Breaker, F-Frame, Type Fd, 3-Pole, 125A, 600 Vac, 250 Vdc

Eaton C Series FD3125 bolt-on circuit breaker is designed for switchboard, panelboard, busway and motor control centre (MCC) applications. It is used to protect branch circuit devices from electrical damage.

Working Mechanism:

• This C Series FD3125 bolt-on circuit breaker is controlled by the circuit breaker handle and the Push-to-Trip button.
• The unit passes current through its current-carrying contacts.
• When a fault is detected, the contacts back off from each other, tripping the unit thermally or magnetically.
• Reset the breaker by moving the breaker handle to the OFF position.
• Finally, switch the circuit back to the ON position.

Features:

• Eaton C Series FD3125 bolt-on circuit breaker comes in a moulded case to protect the electric circuit from faults.
• It comprises a load-side lug for secure connections and allows a toggle-handle actuation method to control the flow of electric current.
• The breaker comes with an ABC phase connection to protect devices from overloads or short circuits.
• This 3-pole unit allows panel mounting for secure installation.
• It comes with fixed instantaneous thermal-magnetic trip to actuate the breaker opening in the event of a ground fault.

Standards and Approvals:

• UL
• CSA
• IEC
• NEMA AB1-993

Frequently Asked Questions:

Q. What are the performance ratings of C Series FD3125 bolt-on circuit breaker?

A.

• Amperage Rating - 125A
• AC Voltage Rating - 600VAC
• AIR Rating - 65kA at 240 / 277VAC
• DC Voltage Rating - 250VDC

Q. Why do circuit breakers trip?

A.

• Circuit overloads
• Short circuits
• Ground fault surges
• Defective circuit breaking
• Arc faults

Q. What is the operating temperature rating of this breaker?

A. It can operate at temperatures ranging from -4 degrees to 158 degrees Fahrenheit.

Q. How to tell if my circuit breaker is malfunctioning?

A.

• Breaker trips frequently.
• Burning smell from the circuit box.
• Scorch marks or other signs of damage on the box.
• Breaker does not stay at the reset mode.

Q. What are the things to inspect while using a circuit breaker?

A.

• Remove dust or moisture from the surface of the circuit breaker with a vacuum or cloth. Do not blow debris into the circuit breaker.
• Switch to ON and OFF multiple times to ensure that the mechanical linkages are free.
• Check base, operating handle and cover for any cracks, discolouration & chipping.
• Check connectors and terminals for signs of overheating and looseness.
• Check the mounting hardware and the area where it is installed.

Q. How to install this circuit breaker?

A.

• Check for damage before mounting.
• Check that the mounting panel is predrilled using bolt drilling plan.
• Place the circuit breaker on the mounting surface.
• Position optional terminal end cover (if any).
• After mounting, connect the accessory leads and load terminals.
• Check terminal connecting hardware for correct torque loading.