Eaton Motor Protection Circuit Breakers
Motor Protection Circuit Breakers (MPCB)
Product Description
Motor protection circuit breakers (MPCBs) provide UL 489 branch circuit protection, UL 508 and CSA C22.2 No. 14 motor protection, and meet IEC 60947-2 and 50947-4 requirements. Typical branch motor loads are protected by three-component starters, consisting of breaker, contactor and overload relay, or fuse, contactor and overload relay. The MPCB application-specific protection eliminates the need for motor overload relay found in the traditional three-component starter assembly. The branch motor load protection is simplified to an MPCB and contactor, reducing both space requirements and heat generation in customer panels. Protection is provided by application-specificelectronic trip units.
The electronic trip unit provides typical motor overload relay functionality and short-circuit protection against potential phase-tophase or phase-to-ground faults.
- Disconnecting means
- Branch circuit short-circuit protection
- Overload protection
- Class 5, 10, 15 and 20
- Phase unbalance protection
- FDMP breaker trips when there is a 40% difference between any phase compared to the calculated three-phase average
- Phase loss protection
- Active when the maximum phase current is greater than 50% of FLA setting
- Breaker will trip when minimum phase current is 25% or less than the maximum phase current
- Time delay of 1 or 2 seconds before breaker trips
- Thermal memory to prevent immediate restart after overload trip to allow motor to cool down
The MPCB is based on the Series C F-Frame. Accessories for standard Series C breakers apply to the MPCB. Unlike Motor Circuit Protectors (MCPs), MPCBs are UL 489 listed with 35 kA and 65 kA interruption ratings.
Product Selection — FDMP and HFDMP
| Continuous Amperes |
35 kA Without Phase Unbalance, Class 10 Motor Protection Only |
35 kA With Phase Unbalance and Adjustable Motor Class Protection |
65 kA Without Phase Unbalance, Class 10 Motor Protection Only |
65 kA With Phase Unbalance and Adjustable Motor Class Protection |
| 80 | FDMP3080L | FDMP3080JL | HFDMP3080L | HFDMP3080JL |
| 100 | FDMP3100L | FDMP3100JL | HFDMP3100L | HFDMP3100JL |
| 160 | FDMP3160L | FDMP3160JL | HFDMP3160L | HFDMP3160JL |
| 205 | FDMP3205L | FDMP3205JL | HFDMP3205L | HFDMP3205JL |