1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the Eaton Cutler-Hammer CHHMCP100R3C Series C Motor Circuit Protector. This device is designed to provide reliable overcurrent protection for motor circuits, safeguarding equipment from damage due to overloads and short circuits. It is a 3-pole, 100 Amp circuit breaker rated for 600VAC and 250VDC applications.
Proper understanding and adherence to these instructions are crucial for optimal performance and safety. All electrical work should be performed by qualified personnel in accordance with national and local electrical codes.
2. Safety Information
WARNING: Risk of Electric Shock or Fire.
- Always disconnect power at the main source before installing, servicing, or removing the circuit breaker. Failure to do so can result in severe injury or death.
- Installation and maintenance must be performed by qualified electrical personnel only.
- Ensure all wiring connections are secure and torqued to the specified values to prevent overheating and potential fire hazards.
- Do not operate the circuit breaker if it appears damaged or has been subjected to excessive force.
- Verify that the circuit breaker's ratings (voltage, current, number of poles) match the application requirements.
3. Product Overview and Components
The Eaton Cutler-Hammer CHHMCP100R3C is a robust motor circuit protector designed for industrial and commercial applications. Key components and labels are illustrated below.
Figure 3.1: Front View of CHHMCP100R3C Circuit Breaker. This image displays the front of the circuit breaker, showing the main toggle switch, the "Push To Trip" button, and various labels including the Cutler-Hammer brand, HMCP designation, 100 Amps rating, 3 Poles, voltage ratings (600VAC-250VDC), and instantaneous trip settings table.
Key Features:
- Toggle Handle: Indicates ON/OFF status and allows manual operation.
- Push To Trip Button: A red button for manually testing the trip mechanism.
- Instantaneous Trip Settings: A rotary dial (labeled A-H) to adjust the instantaneous trip current, ranging from 300A to 1000A.
- Terminal Information: Provides torque specifications for both socket head and slotted head terminals.
- LINE/LOAD Terminals: Clearly marked connection points for incoming power (LINE) and outgoing power to the load (LOAD).
Figure 3.2: Angled Front View with Load Terminals. This view highlights the three load terminals at the bottom of the circuit breaker, where the protected circuit wiring connects.
Figure 3.3: Rear View of CHHMCP100R3C Circuit Breaker. This image shows the rear of the circuit breaker, revealing the mounting points and the auxiliary wiring connections (if applicable) for control circuits.
4. Specifications
| Feature | Specification |
|---|---|
| Brand | CUTLER HAMMER |
| Model Number | CHHMCP100R3C (Part Number: HMCP100R3C) |
| Current Rating | 100 Amps |
| Number of Poles | 3 |
| Voltage Rating | 600 Volts AC, 250 Volts DC |
| Circuit Breaker Type | Standard, Magnetic Circuit Breaker (Motor Circuit Protector) |
| Mounting Type | Wall Mount |
| Product Dimensions (D x W x H) | 30"D x 8"W x 6"H (Note: These dimensions seem unusually large for a breaker of this type, typically referring to package or overall system. Actual breaker dimensions are smaller.) |
| Item Weight | 4.1 pounds |
| Color | Black (housing), White (face) |
| UPC | 786679150856 |
Note: Product dimensions provided may refer to packaging or a larger system component. Always verify physical dimensions for specific installation requirements.
5. Setup and Installation
Installation of the CHHMCP100R3C circuit breaker must be performed by a qualified electrician and comply with all applicable national and local electrical codes (e.g., NEC, local building codes).
- Power Disconnection: Before beginning any work, ensure that all power to the circuit where the breaker will be installed is completely disconnected and locked out at the main service panel. Verify zero voltage with a suitable testing device.
- Mounting: Securely mount the circuit breaker in its intended enclosure or panel using appropriate hardware. The breaker is designed for wall mount applications.
- Wiring Connections:
- Connect the incoming power conductors to the "LINE" terminals at the top of the breaker.
- Connect the load conductors (to the motor or protected equipment) to the "LOAD" terminals at the bottom of the breaker.
- Ensure proper phase sequence for 3-phase applications.
- Use appropriate wire gauges for 100 Amp service.
- Torque Specifications: Tighten all terminal screws to the torque values specified on the breaker's label (refer to Figure 3.1 for "Terminal Information"). Incorrect torque can lead to loose connections, overheating, and potential failure.
- Instantaneous Trip Setting: Adjust the instantaneous trip setting dial (A-H) to the desired value based on the motor's inrush current characteristics and coordination requirements. Consult motor data sheets and electrical engineering guidelines for proper selection.
- Verification: After installation, double-check all connections, ensure no loose wires, and confirm the breaker is securely mounted.
- Power Restoration: Carefully restore power to the circuit and test the operation of the protected equipment.
6. Operating Instructions
The CHHMCP100R3C circuit breaker operates as a protective device for motor circuits. Its primary function is to interrupt the flow of current when an overload or short circuit condition occurs.
- Turning ON: Move the toggle handle firmly to the "ON" position.
- Turning OFF: Move the toggle handle firmly to the "OFF" position to de-energize the circuit.
- Trip Indication: When an overload or short circuit occurs, the breaker will automatically trip. The handle will typically move to a central, tripped position (between ON and OFF).
- Resetting After a Trip: To reset a tripped breaker, first move the handle completely to the "OFF" position. Then, move it firmly to the "ON" position. If the breaker immediately trips again, do not force it; investigate the cause of the trip.
- Testing the Trip Mechanism: Periodically, you can test the mechanical trip function by pressing the "Push To Trip" button. This will move the handle to the tripped position. Reset the breaker as described above after testing.
- Instantaneous Trip Adjustment: The instantaneous trip setting (A-H dial) determines the current level at which the breaker will trip almost instantly in response to a high fault current (e.g., a short circuit). This setting should be chosen to allow for motor starting inrush current without nuisance tripping, while still providing rapid protection against severe faults.
7. Maintenance
Regular maintenance helps ensure the longevity and reliable operation of your circuit breaker. Always disconnect power before performing any maintenance.
- Visual Inspection: Periodically inspect the breaker for any signs of physical damage, discoloration, burning, or loose connections.
- Cleaning: Keep the breaker and its surrounding area clean and free of dust, dirt, and moisture. Use a dry, non-abrasive cloth for cleaning. Do not use solvents or liquid cleaners.
- Terminal Check: With power disconnected, periodically check terminal screw tightness, especially after initial installation and during routine system checks. Re-torque to specifications if necessary.
- Functional Test: Perform a functional test using the "Push To Trip" button annually to ensure the mechanical trip mechanism is operational.
8. Troubleshooting
If you encounter issues with your CHHMCP100R3C circuit breaker, refer to the following common troubleshooting steps. Always ensure power is disconnected before investigating electrical issues.
- Breaker Trips Frequently:
- Overload: The connected motor or equipment may be drawing more current than the breaker's rating. Check the motor's nameplate current and compare it to the breaker's 100 Amp rating.
- Short Circuit: A direct short circuit in the wiring or equipment will cause an immediate trip. Inspect wiring for damage, insulation breakdown, or faulty equipment.
- Incorrect Instantaneous Trip Setting: If the instantaneous trip setting is too low, it may trip during motor start-up. Adjust the setting to a higher value if appropriate for the motor's inrush current.
- Loose Connections: Loose terminal connections can cause localized heating and nuisance tripping. Check and re-torque all connections.
- Breaker Does Not Reset:
- Ensure the handle is moved fully to the "OFF" position before attempting to move it to "ON".
- If it still does not reset, there may be a persistent fault in the circuit or an internal fault within the breaker. Do not force the handle.
- No Power to Load (Breaker ON):
- Check upstream protective devices (e.g., main breaker, fuses) to ensure they are not tripped or blown.
- Verify continuity of wiring to and from the breaker.
If troubleshooting steps do not resolve the issue, contact a qualified electrician or Eaton Cutler-Hammer technical support.
9. Warranty and Support
The Eaton Cutler-Hammer CHHMCP100R3C circuit breaker comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use and service.
For warranty claims, technical assistance, or further support, please contact Eaton Cutler-Hammer customer service or visit their official website. Ensure you have your product model number (CHHMCP100R3C) and purchase information available.
Eaton Official Website: www.eaton.com