ABB / General ElectricTHKMA836800
ABB / General Electric THKMA31000 Molded Case Circuit Breaker
- 1000A
- 3 Pole
- Bolt-On
ABB / General Electric
THKMA31000
Molded Case Circuit Breaker
Brand
ABB / General Electric
SKU
THKMA31000
Quantity
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ABB / General Electric THKMA31000 - 1000A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty industrial applications, the GE THKMA31000 is a 1000A, 3-pole molded case circuit breaker. It provides essential overcurrent protection for commercial systems. Designed for bolt-on installation, this K-Frame breaker fits into GE A-Series panelboards and motor control centers. It replaces the legacy TKMA31000 and can be substituted with Tmax XT breakers using a retrofit kit. The unit utilizes a thermal-magnetic trip mechanism and achieves a 35kAIC rating at 480VAC.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THKMA31000-R |
| Series | THKMA |
| Amperage | 1000A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 40kA @ 250VDC, 22kA @ 500VDC |
| Frame Type | THKMA |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE A-Series Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (4) 250-500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| 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, Lug Kits |
|---|---|
| Accessories | Load Lugs (TCAL121) |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip, High Interrupting Capacity |
Product FAQs
5 answersWhat types of equipment can the THKMA31000 be installed in?
This 1000A K-frame breaker is designed for use in GE A-Series panelboards, switchboards, and motor control centers.
What are the wire size requirements for the load side lugs?
The load side lugs accept up to four copper or aluminum conductors ranging from 250 kcmil to 500 kcmil per phase.
Is the trip unit on the THKMA31000 adjustable?
Yes, this breaker features an interchangeable thermal-magnetic trip unit with fixed thermal (Long-Time) and adjustable magnetic (Instantaneous) settings. This allows you to fine-tune the short-circuit protection for your specific load.
Is the THKMA31000 suitable for direct current (DC) systems?
Yes, this breaker is rated for DC applications. It provides up to 40kA interrupting capacity at 250V DC and 22kA at 500V DC.
Can the trip unit be swapped out if load requirements change?
Yes, the THKMA31000 features an interchangeable trip unit design. This allows panel builders to replace the trip unit without removing the entire breaker frame if the facility amperage requirements change.
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