ABB / General Electric TKMA31000 Molded Case Circuit Breaker
- 1000A
- 3 Pole
- Bolt-On
Quantity
ABB / General Electric TKMA31000 - 1000A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty commercial and industrial applications, the GE TKMA31000 is a 3-pole, 1000A molded case circuit breaker. It provides robust power distribution and equipment protection across demanding electrical environments. This bolt-on MCCB installs into GE switchboards, motor control centers, and AV1 or CCB panelboards. While part of a legacy K-Frame lineup, it can be replaced by the Tmax XT7 using a retrofit kit. It features an interchangeable thermal-magnetic trip unit.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | TKMA31000 |
| Series | TKMA |
| Amperage | 1000A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | TKM |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE Switchboards, Motor Control Centers, GE CCB Panelboards, GE AV1 Panelboards |
| Wire Gauge | (4) 250-350 kcmil (Cu) or (4) 250-500 kcmil (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 Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, HACR Rated |
Product FAQs
5 answersWhich panelboards and switchboards are compatible with the TKMA31000 breaker?
This K-frame breaker is designed for use in legacy GE switchboards, motor control centers, and GE CCB or AV1 panelboards. Verify your specific enclosure accepts TKM frame bolt-on breakers before installation.
What wire sizes are accepted by the standard lugs on this 1000A breaker?
The standard lugs accommodate four 250 to 350 kcmil copper conductors or four 250 to 500 kcmil aluminum conductors per phase. Ensure proper torque specifications are followed during termination to prevent thermal issues.
How does the trip unit function on the TKMA31000?
It features a thermal-magnetic trip unit with fixed thermal protection for long-time overloads and an adjustable magnetic setting for instantaneous short-circuit protection. This allows you to fine-tune the instantaneous trip threshold based on your specific load requirements and coordination studies.
Why is this breaker listed under both ABB and General Electric?
ABB acquired GE Industrial Solutions. Legacy GE molded case circuit breakers, including the TKM frame series, are now managed and supported under the ABB brand portfolio.
What safety precautions are required when installing this 1000A MCCB?
Always de-energize the switchboard or panelboard before servicing. Installation must be performed by a qualified electrician wearing appropriate PPE, strictly following NFPA 70E guidelines for arc flash and shock hazards.
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