ABB | MOLDED CASE CIRCUIT BREAKERS
Product overview
SACE Tmax XT molded case circuit breakers protect low-voltage power distribution systems with thermal-magnetic and electronic trip units. The IEC family comprises XT1, XT2, XT3, XT4, XT5, XT6 and XT7 frames, including the XT7 M stored-energy operating mechanism.
Key features
- Thermal-magnetic, Ekip Dip, Ekip Touch and Ekip Hi-Touch protection.
- 3-pole and 4-pole configurations with frame-specific fixed, plug-in and withdrawable versions.
- Metering, communication and remote operation through compatible Ekip modules.
Technical selection summary
| Product range | IEC 60947-2 molded case circuit breakers; XT1-XT7 and XT7 M |
|---|---|
| Trip-unit rated current, In | 1.6-1600A; frame and trip-unit dependent |
| Frame rated current, Iu | XT1: 160A; XT2: 160A; XT3: 250A; XT4: 160/250A; XT5: 400/630A; XT6: 800/1000A; XT7/XT7 M: 800/1000/1250/1600A |
| Poles | 3P / 4P |
| Rated operational voltage, Ue | Up to 690V AC, 50/60Hz |
| Icu at 415V AC | XT1: 18-70kA; XT2: 36-150kA; XT3: 36-50kA; XT4: 36-200kA; XT5: 36-200kA; XT6: 36-70kA; XT7/XT7 M: 50-120kA |
| Rated insulation voltage, Ui | XT1/XT3: 800V; XT2/XT4/XT5/XT6/XT7: 1000V |
| Rated impulse withstand voltage, Uimp | 8kV |
| Operating temperature | -25 to +70C with applicable current derating |
| Selection scope | IEC AC power distribution; current, frame, breaking class, trip unit and mounting are linked |
Frame and trip-unit selection
| XT1 / TMD | 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A, 160A |
|---|---|
| XT2 / TMD | 1.6A, 2A, 2.5A, 3.2A, 4A, 5A, 6.3A, 8A, 10A, 12.5A, 16A, 20A, 25A, 32A |
| XT2 / TMA | 40A, 50A, 63A, 80A, 100A, 125A, 160A |
| XT2 / Ekip Dip LS/I, Ekip Dip LSI, Ekip Dip LSIG, Ekip Dip LIG, Ekip C Dip LSI, Ekip C Dip LSIG | 10A, 25A, 63A, 100A, 160A |
| XT2 / Ekip Touch LSI, Ekip Touch LSIG, Ekip Touch Measuring LSI, Ekip Touch Measuring LSIG, Ekip Hi-Touch LSI, Ekip Hi-Touch LSIG | 40A, 63A, 100A, 160A |
| XT3 / TMD | 63A, 80A, 100A, 125A, 160A, 200A, 250A |
| XT4 / TMD | 16A, 20A, 25A, 32A |
| XT4 / TMA | 40A, 50A, 63A, 80A, 100A, 125A, 160A, 200A, 225A, 250A |
| XT4 / Ekip Dip LS/I, Ekip Dip LSI, Ekip Dip LSIG, Ekip Dip LIG, Ekip C Dip LSI, Ekip C Dip LSIG, Ekip Dip Measuring LSI, Ekip Dip Measuring LSIG | 40A, 63A, 100A, 160A, 250A |
| XT4 / Ekip Touch LSI, Ekip Touch LSIG, Ekip Touch Measuring LSI, Ekip Touch Measuring LSIG, Ekip Hi-Touch LSI, Ekip Hi-Touch LSIG | 100A, 160A, 250A |
| XT5 / TMA | 320A, 400A, 500A, 630A |
| XT5 / Ekip Dip LS/I, Ekip Dip LSI, Ekip Dip LSIG, Ekip Dip LIG | 250A, 320A, 400A, 630A |
| XT5 / Ekip Touch LSI, Ekip Touch LSIG, Ekip Touch Measuring LSI, Ekip Touch Measuring LSIG, Ekip Hi-Touch LSI, Ekip Hi-Touch LSIG | 250A, 320A, 400A, 500A, 630A |
| XT6 / TMA | 630A, 800A |
| XT6 / Ekip Dip LS/I, Ekip Dip LSI, Ekip Dip LSIG, Ekip Dip LIG | 630A, 800A, 1000A |
| XT7 / Ekip Dip LS/I, Ekip Dip LSI, Ekip Dip LSIG, Ekip Dip LIG, Ekip Touch LSI, Ekip Touch LSIG, Ekip Touch Measuring LSI, Ekip Touch Measuring LSIG, Ekip Hi-Touch LSI, Ekip Hi-Touch LSIG | 630A, 800A, 1000A, 1250A, 1600A |
| XT7 M / Ekip Dip LS/I, Ekip Dip LSI, Ekip Dip LSIG, Ekip Dip LIG, Ekip Touch LSI, Ekip Touch LSIG, Ekip Touch Measuring LSI, Ekip Touch Measuring LSIG, Ekip Hi-Touch LSI, Ekip Hi-Touch LSIG | 630A, 800A, 1000A, 1250A, 1600A |
Accessories and installation
| Signalling | AUX, AUP, AUE; RTC and spring-charge signalling for applicable stored-energy mechanisms |
|---|---|
| Remote control | Shunt opening and undervoltage releases; motor operators MOD, MOE/MOE-E and XT7 M motor |
| Manual operation | Direct and extended rotary handles; toggle extensions and locking devices |
| Electronic trip units | Ekip communication, power supply, signalling, test and display modules; compatible rating plugs |
| Installation | Fixed/plug-in/withdrawable conversion kits, terminals, terminal covers, phase separators and interlocks |
Typical applications
- Low-voltage distribution boards and switchgear
- Industrial feeder and equipment protection
- Commercial buildings and infrastructure power distribution
Technical documents
ABB SACE Tmax XT IEC catalogue (PDF)
ABB SACE Tmax XT technical characteristics, dimensions and wiring (PDF)
Product reference images and drawings
Dimensions and mounting drawings
