Siemens FXD63B175 175 Amp Type FXD6-A Circuit Breaker Instruction Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of the Siemens FXD63B175 175 Amp Type FXD6-A Circuit Breaker. This device is designed to protect electrical circuits from overcurrents, which can result from overloads or short circuits. It is crucial to read and understand all instructions before proceeding with any installation or operation.

The Siemens FXD6-A series breakers are available in 70-250 amps and are designed for double and three-pole configurations. The FXD63B175 model is a 175 Amp, 3-pole circuit breaker. These breakers are specifically intended for use only in electrical panels marked to accept FXD6-A breakers. Always consult the panel's wiring diagram to confirm compatibility before installation.

2. Safety Information

WARNING: Electrical shock hazard. Improper installation or maintenance can cause serious injury or death. Installation and servicing must be performed by qualified personnel only. Always disconnect power before working on electrical equipment.

Hazardous Voltage: This equipment operates with hazardous voltage. Disconnect and lock out all power sources before installing or servicing. Failure to do so will result in death or serious injury.
Qualified Personnel: Installation, adjustment, repair, and maintenance of this equipment must be performed by qualified personnel who have appropriate training and experience with electrical equipment.
Panel Compatibility: This circuit breaker is intended for use only in panels marked to accept FXD6-A breakers. Refer to the panel's wiring diagram to confirm compatibility.
Proper Wiring: Ensure all wiring connections are secure and meet local electrical codes.
Personal Protective Equipment (PPE): Always wear appropriate PPE, including insulated gloves and eye protection, when working with electrical systems.

Front view of Siemens FXD63B175 circuit breaker with safety labels and specifications.

Image Description: This image displays the front of the Siemens FXD63B175 circuit breaker. Prominently visible are safety labels in multiple languages (English and Spanish) warning of hazardous voltage and the requirement for qualified personnel. Key specifications like the 175 Amp rating, model number FXD63B175, and voltage ratings are also printed on the breaker's face. The "PUSH TO TRIP" button and adjustment dials for the trip unit are clearly shown at the bottom.

3. Product Overview

The Siemens FXD63B175 is a 3-pole, 175 Amp circuit breaker from the Sentron Series. It is designed for robust performance in various electrical distribution applications. Key features include:

Current Rating: 175 Amps.
Number of Poles: 3.
Type: FXD6-A, AFCI (Arc Fault Circuit Interrupter) type.
Mounting Type: Plug-In Mount.
Non-Interchangeable Trip: The trip unit is fixed and cannot be interchanged.
Lug Options: Compatible with TA1FD350A, TC1FD350, or CCF250 lugs (lugs are not included with the breaker).

Image Description: This image shows a side profile of the Siemens FXD63B175 circuit breaker. It highlights the compact design and the robust casing. A label indicating "Made in Mexico" is visible on the side.

Bottom view of Siemens FXD63B175 circuit breaker, showing the three lug connection points.

Image Description: This image provides a view of the bottom of the Siemens FXD63B175 circuit breaker, clearly showing the three connection points where the lugs (not included) would be attached for wiring. The robust construction of the terminals is visible.

4. Setup and Installation

Installation of the Siemens FXD63B175 circuit breaker must be performed by a qualified electrician in accordance with all national and local electrical codes. Incorrect installation can lead to electrical hazards, equipment damage, and void the product warranty.

Power Disconnection: Before beginning any work, ensure that all power to the electrical panel is completely disconnected and locked out. Verify with a voltage tester.
Panel Compatibility Check: Confirm that the electrical panel is specifically designed to accept Siemens FXD6-A type circuit breakers. Refer to the panel's wiring diagram or manufacturer's specifications.
Lug Installation: If not already present, install the appropriate lugs (TA1FD350A, TC1FD350, or CCF250) onto the breaker terminals. Ensure lugs are securely fastened according to manufacturer specifications.
Mounting the Breaker: Carefully align the circuit breaker with the designated slot in the electrical panel. The FXD63B175 is a plug-in mount type, so ensure it seats firmly and correctly onto the bus bars.
Wiring Connections: Connect the circuit wires to the installed lugs. Ensure proper torque is applied to the lug screws as specified by the lug manufacturer to prevent loose connections and overheating.
Verification: Double-check all connections for tightness and correct wiring. Ensure no bare wires are exposed.
Panel Closure: Once installation is complete and verified, replace the panel cover.
Power Restoration: Restore power to the electrical panel.

5. Operation

The Siemens FXD63B175 circuit breaker operates automatically to protect circuits from overcurrents. It also features a manual trip mechanism.

Normal Operation: In normal operating conditions, the breaker handle will be in the "ON" position.
Automatic Trip: If an overcurrent (overload or short circuit) occurs, the breaker will automatically trip to the "TRIPPED" position (typically midway between ON and OFF). This indicates a fault in the circuit it protects.
Manual Trip: To manually trip the breaker for testing or maintenance, press the "PUSH TO TRIP" button located on the front of the breaker. This will move the handle to the "TRIPPED" position.
Resetting a Tripped Breaker:
1. First, identify and resolve the cause of the trip (e.g., unplug overloaded devices, fix short circuits).
2. Move the breaker handle firmly to the "OFF" position.
3. Then, move the handle firmly to the "ON" position to restore power.
4. If the breaker immediately trips again, do not attempt to reset it repeatedly. There is a persistent fault that requires professional attention.

6. Maintenance

Regular maintenance helps ensure the longevity and reliable operation of your circuit breaker. All maintenance should be performed by qualified personnel with power disconnected.

Visual Inspection: Periodically inspect the breaker for any signs of physical damage, discoloration, or loose connections.
Cleaning: Keep the breaker and surrounding area clean and free of dust and debris. Use a dry, non-abrasive cloth. Do not use liquids or solvents.
Connection Checks: Annually, or as recommended by local codes, have a qualified electrician check the tightness of all electrical connections to the breaker.
Testing: The "PUSH TO TRIP" button can be used for periodic functional testing. However, this only tests the mechanical trip mechanism, not the overcurrent sensing capabilities. Comprehensive testing should be performed by qualified professionals.

7. Troubleshooting

If your Siemens FXD63B175 circuit breaker trips, follow these troubleshooting steps. Always ensure power is disconnected before inspecting any wiring or components.

Breaker Trips Immediately After Reset: This indicates a persistent short circuit or severe overload. Do not attempt to reset the breaker repeatedly. Disconnect all loads from the circuit and try resetting. If it still trips, there is a fault in the wiring or the breaker itself may be faulty. Contact a qualified electrician.
Breaker Trips Intermittently: This could be due to an intermittent overload, a loose connection, or a failing appliance. Monitor the devices connected to the circuit. Check for any signs of overheating at outlets or switches.
No Power to Circuit, Breaker Not Tripped: Check if the main breaker is tripped. Inspect the wiring connections to the breaker for looseness or damage. If the breaker appears to be in the "ON" position but there is no power, the breaker may be faulty and require replacement by a qualified electrician.
Breaker is Hot to the Touch: This is a serious indication of an overload or a loose connection. Immediately disconnect power to the circuit and have it inspected by a qualified electrician.

For any issues that cannot be resolved with these steps, contact a qualified electrician or Siemens customer support.

8. Specifications

Detailed technical specifications for the Siemens FXD63B175 Circuit Breaker:

Specification	Value
Brand	SIEMENS
Model Number	FXD63B175
Current Rating	175 Amps
Circuit Breaker Type	AFCI (Arc Fault Circuit Interrupter)
Mounting Type	Plug-In Mount
Number Of Poles	3
Voltage	600 Volts
Item Weight	8.55 pounds
Product Dimensions	11.1 x 5.6 x 6.9 inches
UPC	783643211261

Image showing the Siemens FXD63B175 circuit breaker next to a hand for scale, with dimensions of 11 inches (27 cm) indicated.

Image Description: This image provides a visual representation of the Siemens FXD63B175 circuit breaker's size, shown next to a human hand for scale. Dimensions are indicated, with a height of 11 inches (27 cm) clearly marked, helping to visualize the product's physical footprint.

9. Warranty and Support

For warranty information, technical support, or service inquiries regarding your Siemens FXD63B175 Circuit Breaker, please contact Siemens customer service directly. Refer to the official Siemens website or product packaging for the most current contact details and warranty terms.

Siemens Official Website: www.siemens.com

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