Eaton / Cutler-HammerRD325T35W
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Eaton / Cutler-Hammer RD325T33W Molded Case Circuit Breaker
- 2500A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
RD325T33W
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
RD325T33W
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Eaton / Cutler-Hammer RD325T33W - 2500A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty applications, the Eaton RD325T33W is a 3-pole, 2500A molded case circuit breaker from the Series C R-Frame family. This bolt-on MCCB installs into compatible Eaton switchboards, motor control centers, and panelboards. It allows for flexible lug configurations. Rated at 65 kAIC at 480V, it features a Digitrip 310 RMS electronic trip unit. This advanced microprocessor provides adjustable long-time and short-time (LS) protection for precise coordination.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | RD325T33W |
| Series | RD |
| Amperage | 2500A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 65kA @ 480VAC, 50kA @ 600VAC |
| Amperage Range | 1250-2500A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Switchboards, Motor Control Centers, Panelboards |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LS |
| Trip Function | Long-Time, Short-Time |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Rating Plugs, Padlock Attachment, Bell Alarm |
|---|---|
| Accessories | Digitrip RMS 310 Electronic Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit, True RMS Sensing |
Product FAQs
7 answersWhat specific protection functions does the LS designation on the RD325T33W indicate?
The LS code indicates the Digitrip RMS 310 electronic trip unit includes adjustable Long-Time (L) and Short-Time (S) delay functions. This allows panel builders to fine-tune the time-current curve for optimal selective coordination with downstream breakers, without an instantaneous override.
Does the RD325T33W include ground fault protection?
No, the LS trip function code indicates Long-Time and Short-Time protection only. It does not include integral ground fault (G) protection. If equipment ground fault sensing is required by code, a different trip unit configuration, such as LSG or LSIG, would be necessary.
Is a rating plug required to operate the RD325T33W breaker?
Yes, the Digitrip 310 electronic trip unit relies on an interchangeable rating plug to set the continuous current rating. The breaker must have the appropriate 2500A rating plug installed prior to energizing the circuit.
Can the RD325T33W be applied in DC power systems?
No. Because it utilizes a Digitrip RMS 310 solid-state electronic trip unit, this breaker is strictly rated for 50/60 Hz AC applications. Electronic trip units rely on current transformers that do not function in DC circuits.
Does the RD325T33W have built-in thermal protection for the trip unit?
Yes, the Digitrip 310 trip unit contains internal thermal protective circuitry. If the internal ambient temperature at the printed circuit board reaches approximately 100 degrees Celsius, it will initiate a self-protection trip to prevent damage to the electronics.
Can the Eaton RD325T33W replace older Cutler-Hammer or Westinghouse R-Frame breakers?
Yes, Eaton Series C R-Frame breakers are backward compatible with legacy Cutler-Hammer and Westinghouse R-Frame installations. They share the same physical footprint and bolt-on mounting patterns for seamless retrofitting in existing switchboards and motor control centers.
Can the trip unit on the RD325T33W be field-tested?
Yes, the Digitrip RMS 310 trip unit features built-in test points. It can be functionally tested in the field using a compatible Eaton test kit to verify the Long-Time and Short-Time trip operations without requiring primary current injection.
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