Eaton HMCP100R3C Cutler-Hammer HMCP Series Thermal Magnetic Circuit Breakers

Here's a detailed technical breakdown of the Eaton HMCP100R3C / Cutler-Hammer HMCP Series circuit breaker:

1. Product Identification

Manufacturer: Eaton Electrical / Cutler-Hammer

Series: HMCP (Heavy Molded Case Protector)

Model: HMCP100R3C

"100" = 100A current rating

"R3" = 3-pole version

"C" = Design series

2. Technical Specifications

Parameter Specification

Rated Current 100A

Number of Poles 3P (3-phase)

Voltage Rating 480V AC (600V AC optional)

Frequency 50/60Hz

Interrupting Capacity 65kA @ 480V AC

Trip Mechanism Thermal-Magnetic

Trip Curve Fixed (non-adjustable)

Enclosure NEMA 1 (indoor use)

Standards UL 489, CSA C22.2 No. 5, IEC 60947-2

3. Construction Features

Frame: Heavy-duty molded case

Contacts: Silver-alloy, arcing resistant

Trip Unit:

Bimetallic element for thermal protection

Solenoid-actuated magnetic trip

Terminals: Copper alloy, accepts 1/0 - 250kcmil conductors

4. Performance Characteristics

Thermal Trip:

125% of rated current: trips in <1 hour

600% of rated current: trips in 4-10 seconds

Magnetic Trip:

Instantaneous trip at 800-1200% of rated current

Mechanical Life: 10,000 operations minimum

Electrical Life: 5,000 operations at rated current

5. Typical Applications

Motor branch circuit protection

Industrial control panels

Power distribution in manufacturing facilities

HVAC systems

Pump and compressor controls

6. Installation Requirements

Torque Specifications:

Line/Load Terminals: 50 lb-in (5.6 Nm)

Ambient Temperature:

Rated for 40°C (104°F) ambient

Derate above 40°C per NEC guidelines

Clearances:

1" (25.4mm) side-to-side

3" (76.2mm) above/below

7. Accessories (Sold Separately)

MX Shunt Trip (MX100R3C)

OF Auxiliary Switch (OF100R3C)

UV Undervoltage Release (UV100R3C)

Mechanical Interlock Kit (IL100R3C)

8. Maintenance

Inspection Interval: Annual recommended

Testing:

Thermal trip: 300% rated current test

Magnetic trip: 800% test

Cleaning: Use only non-abrasive cleaners

9. Compliance Markings

UL Listed (E117005)

CSA Certified (LR92811)

CE Marked (where applicable)

10. Ordering Information

Base Unit: HMCP100R3C

Catalog Number Breakdown:

HMCP = Series

100 = Ampere rating

R = Thermal-magnetic

3 = 3-pole

C = Current production