Eaton / Cutler-Hammer LDC3400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer LDC3400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Utilizing advanced current-limiting technology, this 400A L-Frame breaker significantly reduces let-through energy during severe fault conditions. It boasts a massive 200kAIC rating at 240V and 100kAIC at 480V, making it ideal for high-capacity industrial networks. The unit integrates into Eaton Pow-R-Line 4 panelboards and motor control centers. Equipped with adjustable magnetic trip settings and a trip-free mechanism, it ensures precise coordination and reliable circuit isolation.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LDC3400 |
| Series | LDC |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line 4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 4/0 AWG - 600 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 4/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs (3TA401LDK) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, High Interrupting Capacity, Trip-Free Mechanism, Visual Trip Indicator |
Product FAQs
8 answersWhat is the difference between the Eaton LD3400, HLD3400, and LDC3400?
These breakers share the same physical L-frame footprint but have different interrupting capacities. The LD3400 is the standard tier, the HLD3400 is high-interrupting, and the LDC3400 is the ultra-high current limiting version rated for 200kA at 240V and 100kA at 480V.
What equipment is the LDC3400 designed to be installed in?
This Series C L-frame breaker is compatible with Eaton Pow-R-Line 4 panelboards, switchboards, and motor control centers.
Can the LDC3400 replace an older Westinghouse L-frame breaker?
Yes, Eaton Cutler-Hammer Series C breakers are backwards compatible. The LDC3400 will physically fit in the same mounting space as older Westinghouse or Cutler-Hammer LD, HLD, and LDC breakers with the same pole and amperage configuration.
What does the 'C' in the LDC3400 catalog number indicate?
The 'C' designates this as a current limiting circuit breaker. It is designed to significantly reduce let-through energy during severe fault conditions compared to standard LD or HLD frames.
What lugs are used with the LDC3400, and what wire sizes do they accept?
This breaker typically uses 3TA401LDK line and load lugs, which accept either aluminum or copper wire ranging from 4/0 AWG to 600 kcmil.
How is the LDC3400 mounted in an enclosure?
It features a unit mount configuration, meaning it bolts securely to the backpan of the panelboard or switchboard rather than plugging directly onto the bus bars.
Are the trip settings on the LDC3400 adjustable?
The thermal protection (Long-Time) is fixed at 400 amps, but the magnetic protection (Instantaneous) is adjustable, allowing electricians to coordinate the trip response with other devices in the system.
Can the LDC3400 be used in DC applications?
Yes, in addition to its 600VAC rating, this breaker is rated for 250VDC with an interrupting capacity of 22kA.
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