Eaton / Cutler-Hammer FG3070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer FG3070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Belonging to the legacy Westinghouse F-Frame family, the Eaton FG3070 is a 70A MCCB designed for diesel engine generators. This unit mount breaker installs into Eaton Series C panelboards, switchboards, and motor control centers, utilizing lug terminals for 14 to 1/0 AWG wire. Featuring a fixed thermal-magnetic trip, it offers reverse feed capability and a low magnetic pickup to provide closer short-circuit protection on generator circuits with limited capacity.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | FG |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 600VAC |
| Frame Type | FG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers, Diesel Engine Generators |
| Wire Gauge | 14 AWG - 1/0 AWG |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Terminals |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Engine Generator Rated, Reverse Feed, Low Magnetic Pickup, HACR Rated |
Product FAQs
6 answersWhat is the primary application for the FG3070 circuit breaker?
The FG3070 is specifically designed as an engine generator molded case circuit breaker. It features a custom trip unit with a low magnetic pick-up range, which provides closer low-level short-circuit protection for generator circuits that have very low short-circuit capacity.
Can the FG3070 be reverse fed?
Yes, the FG3070 supports reverse feed applications. This allows for flexible installation in top or bottom entry panels and cabinets without requiring separate line and load configurations.
What does the LI trip function indicate on this breaker?
The LI designation means the breaker includes Long-Time and Instantaneous trip functions. It utilizes a fixed thermal element for standard overload protection and a fixed magnetic element for short-circuit protection.
Will the FG3070 replace older Westinghouse F-frame breakers?
Yes, Eaton Series C F-frame breakers share the same physical footprint as obsolete Westinghouse, Challenger, and Bryant F-frame breakers. However, installing them in vintage motor control center buckets or panelboards may require updated handle mechanisms or mounting hardware.
What equipment is compatible with the FG3070?
This breaker is designed for use in Eaton Pow-R-Line C panelboards, switchboards, and motor control centers. It is also widely used in diesel engine generator enclosures for heavy commercial applications.
How can I test the mechanical trip mechanism on the FG3070?
The breaker features a Push-to-Trip button on the front face. Pressing this button mechanically trips the breaker, allowing you to verify that the internal mechanism is functioning correctly during routine maintenance.
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