ABB | MOLDED CASE CIRCUIT BREAKERS
Product overview
SACE Tmax T molded case circuit breakers provide IEC low-voltage distribution protection in T4, T5, T6, T7 and T8 frame sizes. Thermal-magnetic and electronic trip units serve distribution circuits, while the T8 frame extends the family to 3200A.
Key features
- T4-T6 thermal-magnetic or electronic protection and T7-T8 electronic protection.
- 3-pole and 4-pole circuit breakers with frame-specific installation systems.
- Manual, rotary-handle and motor-operated solutions with compatible signalling and release accessories.
Technical selection summary
| Product range | IEC molded case circuit breakers; T4, T5, T6, T7/T7 M and T8 |
|---|---|
| Trip-unit rated current, In | 20-3200A; frame and trip-unit dependent |
| Frame rated current, Iu | T4: 250/320A; T5: 400/630A; T6: 630/800/1000A; T7: 800/1000/1250/1600A; T8: 2000/2500/3200A |
| Poles | 3P / 4P |
| Rated operational voltage, Ue | Up to 690V AC, 50/60Hz |
| Icu at 415V AC | T4/T5: 36-200kA; T6: 36-150kA; T7: 50-170kA; T8: L 85kA / V 130kA |
| Trip units | TMD/TMA; PR221DS, PR222DS/P, PR222DS/PD; PR231/P, PR232/P, PR331/P and PR332/P, by frame |
| Mounting | T4/T5: fixed, plug-in, withdrawable; T6/T7: fixed, withdrawable; T8: fixed |
| T8 dimensions, W x H x D | 3P: 427 x 382 x 282mm; 4P: 553 x 382 x 282mm |
| T8 terminals | 2000/2500A: front, rear or extended spread terminals; 3200A: rear vertical terminals |
| Selection scope | IEC AC power distribution; dedicated DC and high-voltage versions have separate ratings and wiring arrangements |
Frame and trip-unit selection
| T4 / TMD | 20A, 32A, 50A |
|---|---|
| T4 / TMA | 80A, 100A, 125A, 160A, 200A, 250A |
| T4 / PR221DS LS/I, PR222DS/P LSI, PR222DS/P LSIG, PR222DS/PD LSI, PR222DS/PD LSIG | 100A, 160A, 250A, 320A |
| T4 / PR223DS | 160A, 250A, 320A |
| T5 / TMA | 320A, 400A, 500A |
| T5 / PR221DS LS/I, PR222DS/P LSI, PR222DS/P LSIG, PR222DS/PD LSI, PR222DS/PD LSIG, Ekip E-LSIG, Ekip E-LSIG/COM | 320A, 400A, 630A |
| T6 / TMA | 630A, 800A |
| T6 / PR221DS LS/I, PR222DS/P LSI, PR222DS/P LSIG, PR222DS/PD LSI, PR222DS/PD LSIG, PR223DS | 630A, 800A, 1000A |
| T7 / PR231/P LS/I, PR232/P LSI, PR232/P LSIG, PR331/P LSI, PR331/P LSIG, PR332/P LSI, PR332/P LSIG | 400A, 630A, 800A, 1000A, 1250A, 1600A |
| T7 M / PR231/P LS/I, PR232/P LSI, PR232/P LSIG, PR331/P LSI, PR331/P LSIG, PR332/P LSI, PR332/P LSIG | 400A, 630A, 800A, 1000A, 1250A, 1600A |
| T8 / PR232/P-T8, PR331/P LSI, PR331/P LSIG, PR332/P LSI, PR332/P LSIG | 1000A, 1250A, 1600A, 2000A, 2500A, 3200A |
Accessories and installation
| Signalling | Auxiliary, trip and position contacts; stored-energy mechanism status contacts |
|---|---|
| Remote releases | Shunt opening, closing and undervoltage releases; undervoltage time-delay devices |
| Operation | Direct/extended rotary handles; T4-T6 motor operators; stored-energy motor mechanisms for T7 M and T8 |
| Electronic trip units | Rating plugs, external neutral sensors, communication, voltage measurement and test units |
| Installation | Terminals, terminal covers, phase separators, locks, interlocks and frame-specific conversion systems |
Typical applications
- Low-voltage distribution boards and switchgear
- Industrial feeder and equipment protection
- Commercial buildings and infrastructure power distribution
Technical documents
ABB SACE Tmax T4-T7 IEC catalogue (PDF)
ABB SACE Tmax T8 IEC catalogue (PDF)
Product reference images and drawings
Dimensions and mounting drawings
