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Eaton / Cutler-Hammer HMDL3700 Molded Case Circuit Breaker
- 700A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
HMDL3700
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HMDL3700
Quantity
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Eaton / Cutler-Hammer HMDL3700 - 700A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for heavy-duty applications, the Eaton HMDL3700 is a 3-pole, 700A molded case circuit breaker from the Series C M-Frame family. It provides reliable long-time and instantaneous (LI) protection for commercial, industrial, and marine electrical systems. This panel-mount MCCB installs into Eaton Series C panelboards, switchboards, and motor control centers. Rated at 65kAIC at 480VAC, it features a fixed thermal-magnetic trip unit and is a legacy predecessor to the Power Defense PDG4.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HMDL3700 |
| Series | HMDL |
| Amperage | 700A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 25kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (3) 3/0 AWG-400 kcmil (Al/Cu) |
| Max Wire | 400 kcmil |
| Min Wire | 3/0 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, Motor Operator |
|---|---|
| Accessories | Standard Lugs (TA800MA2) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Reverse Feed, Interchangeable Trip Unit, HACR Rated |
Product FAQs
10 answersWhat frame size and series does the HMDL3700 belong to?
It is an M-Frame breaker in the Eaton / Cutler-Hammer Series C family.
What is the difference between the HMDL3700 and the standard MDL3700?
The HMDL3700 features a high interrupting capacity. It provides a 65kA rating at 480VAC, compared to the 50kA rating of the standard MDL3700.
Is the trip unit on the HMDL3700 interchangeable?
Yes, it comes complete with an interchangeable thermal-magnetic trip unit featuring fixed thermal and adjustable magnetic trip functions.
What wire sizes are supported by the standard lugs on this breaker?
The included line and load lugs accept three 3/0 AWG to 400 kcmil aluminum or copper (Al/Cu) conductors per phase.
What equipment is the HMDL3700 designed to be installed in?
This panel mount breaker is compatible with Eaton Series C panelboards, switchboards, and motor control centers.
Can the HMDL3700 be used in direct current systems?
Yes, it is rated for DC applications up to 250VDC, providing a 25kA interrupting capacity at that voltage.
Are the trip settings on the HMDL3700 adjustable?
The thermal, or Long-Time, protection is fixed. However, the magnetic, or Instantaneous, trip setting is adjustable to help coordinate with downstream devices.
What does the LI designation mean on this breaker's trip unit?
LI stands for Long-Time and Instantaneous trip functions. The Long-Time function provides overload protection, while the Instantaneous function protects against short circuits.
How is the HMDL3700 mounted?
It is a panel mount breaker designed to be bolted onto the chassis of compatible Series C equipment.
Can I use this to replace an older Cutler-Hammer HMDL3700?
Yes. Eaton acquired Cutler-Hammer, and they share the same catalog numbers. This breaker is a direct replacement for legacy Cutler-Hammer HMDL3700 units.
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