Eaton / Cutler-Hammer HKDDC3225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer HKDDC3225 - 225A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the Series C family, the Eaton HKDDC3225 is a 225A, 3-pole MCCB engineered for demanding DC environments. It is designed for industrial facilities, data centers, and solar PV systems requiring robust protection. This unit-mount breaker installs into Eaton Series C panelboards, switchboards, and motor control centers. It includes standard lug terminals for secure connections. Rated for 42kAIC at 600VDC, this K-Frame breaker features thermal-magnetic trip technology and PV Guard.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | HKDDC |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 125VDC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 125VDC, 50kA @ 250VDC, 42kA @ 600VDC |
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 3 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, Motor Operator, Terminal Shields |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | DC Rated, High Interrupting Capacity, PV Guard |
Product FAQs
6 answersCan I install the HKDDC3225 in a standard Eaton load center?
No. This is a K-Frame molded case circuit breaker designed for commercial and industrial Eaton Series C panelboards, switchboards, and motor control centers. It will not fit in standard residential load centers.
Is the HKDDC3225 rated for AC applications?
The HKDDC series is specifically engineered and tested for heavy-duty DC environments, such as solar photovoltaic systems and data centers, with a maximum rating of 600VDC. It is not intended for standard AC circuits.
How is the trip unit configured on the HKDDC3225?
It features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. This allows electricians to fine-tune the instantaneous trip threshold based on the specific DC load.
How should the poles be wired for 600VDC applications?
For maximum voltage and interruption ratings in DC systems, multiple poles must be connected in series. Always refer to Eaton installation guidelines for proper series wiring configurations based on whether your system is grounded or ungrounded.
What is the difference between the standard HKD3225 and the HKDDC3225?
The standard HKD3225 is primarily designed for AC systems. The HKDDC3225 is specifically rated for high-voltage DC applications up to 600VDC, making it the correct choice for photovoltaic arrays, battery energy storage, and industrial DC circuits.
What safety precautions are required for reverse feed applications?
When using this breaker in reverse feed applications, special attention must be paid during maintenance. Electricians must verify that no voltage is present on either the line or load terminals before inspecting or servicing the equipment.
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