CIRCUIT BREAKERS
🔶 AIR CIRCUIT BREAKERS (ACB)
NOMINAL CURRENT MAX 6300 A, 3 SWITCHING CAPACITY CLASSES, 5 ELECTRONIC RELEASES, 3- AND 4-POLE VERSIONS
MO air circuit breakers offer full coverage of the 630 – 6300A range with just three contact frame sizes. The nominal current of all contacts can be optimally adjusted to the expansion stage using rating plugs. The smallest rating plug has 250A and at that even with a setting range of 0,4 to 1xIn.
STANDARD DIMENSIONS, EASY TO PLAN
The MO has a uniform frame height and -depth for all current ranges. Only the width of the circuit breaker varies, depending on the number of poles and the frame size. MOs for permanent installation and withdrawable models have identical widths.
CONNECTION SYSTEM
MO circuit breakers up to 5000A come with horizontal connections as standard. The MO 6300A is fitted with vertical connections. The following connections are available as optional extras: Vertical connections, front-side connections and flange connections.
RATED CURRENT MODULE
This replaceable module allows the user to reduce the nominal current of the device for optimal system adjustment, e.g. when commissioning a sub-system. The correct rating plug to choose is one which most closely matches the system’s nominal current.
FRAME SIZE AND SHORT-CIRCUIT BREAKING CAPACITY
📊 Table: Frame Size and Short-Circuit Breaking Capacity
| FRAME SIZE 1 | FRAME SIZE 2 | FRAME SIZE 3 |
|---|---|---|
| 250A | 250A | |
| 315A | 315A | |
| 400A | 400A | |
| 500A | 500A | |
| 630A | 630A | |
| 700A | 700A | |
| 800A | 800A | |
| 1000A | 1000A | |
| 1250A | 1250A | 1250A |
| 1600A | 1600A | 1600A |
| 2000A | 2000A | 2000A |
| 2500A | 2500A | |
| 3200A | 3200A | |
| 4000A | 4000A | |
| 5000A | 5000A | |
| 6300A |
📌 Rated Breaking Capacity
Icu at AC 500V (kA) / Icu at DC 300V (kA):
- Frame Size 1: B = 55 kA, N = 66 kA
- Frame Size 2: B = 66 kA, N = 80 kA
- Frame Size 3: H = 100 kA
LOW VOLTAGE EQUIPMENT
AIR CIRCUIT BREAKERS – SYSTEM OVERVIEW
This diagram shows the modular system and optional components for MO air circuit breakers ranging from 630A to 6300A.
🔢 System Components List
| No. | Component Description |
|---|---|
| 1 | MO circuit breaker, between 630A and 6,300A |
| 2 | External expansion modules |
| 3 | Communication module for PROFIBUS |
| 4 | Position indicator contact: Module for guide frame |
| 5 | Main connection elements: a. Front connection b. Front connection, double hole c. Flange connection d. Horizontal connection, rear-side e. Vertical connection, rear-side |
| 6 | Guide frame |
| 7 | Auxiliary plug connector |
| 8 | Auxiliary contact |
| 9 | Motor operator |
| 10 | Operating cycle counter |
| 11 | Electronic release |
| 12 | Parametric device |
| 13 | Earth-fault protection module |
| 14 | 4-line LCD display |
| 15 | Door sealing frame |
| 16 | Rating plug |
| 17 | EMERGENCY STOP mushroom push button |
| 18 | Closing magnet, voltage release |
🔶 AIR CIRCUIT BREAKER
📌 Description
- ✔️ For system and line protection
- ✔️ Adjustable Electronic Trip Units including: Overload protection, , Short-time delayed short-circuit protection, Instantaneous short-circuit protection, Neutral conductor protection, Earth-fault protection
- ✔️ Internal and external accessories can be easily retrofitted at any time
- ✔️ Various interlocking options secure energy distribution within critical production processes
🧾 FIXED TYPE (Frame Size 1 / Up to 2000A)
| Rating | Three Pole 55kA | Three Pole 60kA | Four Pole 55kA | Four Pole 60kA |
|---|---|---|---|---|
| 800 A | MO108232 | MO108332 | MO108242 | MO108342 |
| 1000 A | MO110232 | MO110332 | MO110242 | MO110342 |
| 1250 A | MO112232 | MO112332 | MO112242 | MO112342 |
| 1600 A | MO116232 | MO116332 | MO116242 | MO116342 |
| 2000 A | MO120232 | MO120332 | MO120242 | MO120342 |
🧾 FIXED TYPE (Frame Size 2 / Up to 3200A)
| Rating | Three Pole 66kA | Three Pole 80kA | Four Pole 66kA | Four Pole 80kA |
|---|---|---|---|---|
| 800 A | – | MO208332 | – | MO208342 |
| 1000 A | – | MO210332 | – | MO210342 |
| 1250 A | – | MO212332 | – | MO212342 |
| 1600 A | – | MO116332 | – | MO116342 |
| 2000 A | MO220232 | MO220332 | MO220242 | MO220342 |
| 2500 A | MO225232 | MO225332 | MO225242 | MO225342 |
| 3200 A | – | MO232332 | – | MO232342 |
🧾 FIXED TYPE (Frame Size 3 / Up to 6300A)
| Rating | Three Pole 100kA | Four Pole 100kA |
|---|---|---|
| 4000 A | MO304432 | MO304442 |
| 5000 A | MO350432 | MO350442 |
| 6300 A | MO364332 | MO364342 |
🔷 LOW VOLTAGE EQUIPMENT
🔻 WITHDRAWABLE TYPE (Frame Size 1 / Up to 2000A)
| Rating | Three Pole 55kA | Three Pole 66kA | Four Pole 55kA | Four Pole 66kA |
|---|---|---|---|---|
| 1000 A | MO110236 | MO110336 | MO110246 | MO110342 |
| 1250 A | MO112236 | MO112336 | MO112246 | MO112346 |
| 1600 A | MO116236 | MO116336 | MO116246 | MO116346 |
| 2000 A | MO120236 | MO120336 | MO120246 | MO120346 |
🔻 WITHDRAWABLE TYPE (Frame Size 2 / Up to 3200A)
| Rating | Three Pole 66kA | Three Pole 80kA | Four Pole 66kA | Four Pole 80kA |
|---|---|---|---|---|
| 1600 A | – | MO116336 | – | MO116346 |
| 2000 A | MO220236 | MO220336 | MO220246 | MO220346 |
| 2500 A | MO225236 | MO225336 | MO225246 | MO225346 |
| 3200 A | – | MO232336 | – | MO232346 |
🔻 FIXED TYPE (Frame Size 3 / Up to 6300A)
| Rating | Three Pole 100kA | Four Pole 100kA |
|---|---|---|
| 4000 A | MO304436 | MO304446 |
| 5000 A | MO350436 | MO350446 |
| 6300 A | MO364336 | MO364446 |
🔶 FUNCTIONS OF THE ETU (Electronic Trip Units) OVERCURRENT RELEASE
🧾 Table: Functions of the Overcurrent Release
| Function | ETU15B | ETU25B | ETU27B | ETU45E | ETU76B |
|---|---|---|---|---|---|
| Overload protection (L) | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
| Short-time delayed short-circuit protection (S) | – | ✔️ | ✔️ | ✔️ | ✔️ |
| Instantaneous short-circuit protection (I) | – | ✔️ | ✔️ | ✔️ | ✔️ |
| Neutral conductor protection (N) | – | – | – | ✔️ | ✔️ |
| Earth-fault protection (G) | – | – | – | ◼️ | ✔️ |
🧰 ACB ACCESSORIES
| Item | Description | Order No. (As Spare Part) | Order Number (Factory Installed) |
|---|---|---|---|
| Auxiliary | Module for fixed-mounted circuit breakers | MO90BB21 | MO80O555 |
| Auxiliary | Module for draw-out circuit breaker with frame | MO90BB24 | MO80OR55 |
| Shut Release | DC 220 V/AC 230 V | MO90AD06 | MO89OG00 |
| Shut Release | DC 110 V/AC 110 V | MO90AD05 | MO89OF00 |
| Shut Release | DC 24 V – 100% ED | MO90AD01 | MO89OB00 |
| Under Voltage Release | DC 220–250 V/AC 208–240 V | MO90AE05 | MO89ON00 |
| – | DC 220–250 V/AC 208–240 V | MO90AE13 | MO89OS00 |
| Motor Operator | DC 220–250 V/AC 208–240 V | MO90AF04 | MO89O400 |
| – | Door sealing frame | MO90AP01 | MO80T400 |
🔷 LOW VOLTAGE EQUIPMENT
📐 DRAWING (ACB)
🔻 MO1 – 3/4 Pole Fixed-Mounting Units and Optional Connection Features
🔻 MO2 – 3/4 Pole Fixed-Mounting Units and Optional Connection Features
🔻 MO3 – 3/4 Pole Fixed-Mounting Units and Optional Connection Features
🔶 CIRCUIT BREAKER – MOULDED CASE CIRCUIT BREAKER (MCCB)
| No. | Component Description |
|---|---|
| 1 | Circuit breakers MC, load-break switches MC-PN, MC-N |
| 2 | IP2X finger protection for box terminal |
| 3 | Cover |
| 4 | IP2X finger protection for cover |
| 5 | Tunnel terminal for Al and Cu cables |
| 6 | Box terminal |
| 7 | Control circuit terminal |
| 8 | Plug-in and extension unit |
| 9 | Clip plate |
| 10 | Busbar adapter |
| 11 | Rear connection |
| 12 | Spacers |
| 13 | Standard auxiliary contact, trip-indicating auxiliary contact |
| 14 | Measurement and communication module |
| 15 | Residual-current release |
| 16 | Rotary drive with shaft support |
| 17 | Extension shaft |
| 18 | Door coupling rotary handle |
| 19 | Rotary handle with rotary drive |
| 20 | Door sealing frame |
| 21 | External warning/additional plate |
| 22 | Remote operator |
| 23 | Toggle lever locking device |
| 24 | Mechanical interlock |
| 25 | Display |
| 26 | DMI module |
| 27 | Profibus interface |
| 28 | Undervoltage release |
| 29 | Time-delay device |
🔷 LOW VOLTAGE EQUIPMENT
🔑 TYPE KEY FOR COMPACT CIRCUIT BREAKERS
🧾 TYPE KEY FOR COMPACT CIRCUIT BREAKERS (690 V AC)
🧾 TYPE KEY FOR COMPACT CIRCUIT BREAKERS (1000 V DC)
🔶 CIRCUIT BREAKERS AND LOAD SWITCHES MZ (MCCB)
📌 Description
Load-Break Switches: MZ112035B → 125A, MZ225035 → 250A, MZ340035 → 400A (no release unit)
MCCBs with Thermomagnetic Release: Up to 125A → MZ1.431B (36kA) – Ir adjustable, Iₙ fixed at 10×Ir , Up to 250A → MZ2.431 (36kA) and MZ2.231 (50kA) – Ir and Ii adjustable, Up to 400A → MZ3.231 (50kA) – Ir and Ii adjustable
MCCBs with Delayed Electronic Release: Up to 630A → MZ3.333 (70kA) – Ir, Isd, Ii, tr, tsd adjustable
🔶 MCCB MZ SIZE 1 TO 3, THREE POLE, 36kA
MZ SIZE 1: Up to 125A with thermomagnetic release and box-terminals
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 20A with box terminals | MZ1C-A20-B | MZ120431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 25A with box terminals | MZ1C-A25-B | MZ125431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 32A with box terminals | MZ1C-A32-B | MZ132431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 40A with box terminals | MZ1C-A40-B | MZ140431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 50A with box terminals | MZ1C-A50-B | MZ150431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 63A with box terminals | MZ1C-A63-B | MZ163431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 80A with box terminals | MZ1C-A80-B | MZ180431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 100A with box terminals | MZ1C-A100-B | MZ110431B |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 125A with box terminals | MZ1C-A125-B | MZ112431B |
MZ SIZE 1: LOAD BREAK SWITCH 125A
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Load Break Switch, 3-pole, 125A with box terminals | MZ1-N-125-B | MZ112035B |
MZ SIZE 1: LOAD BREAK SWITCH 125A
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 160A | MZ2C-A160 | MZ216431 |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 200A | MZ2C-A200 | MZ220431 |
| Moulded Case Circuit Breaker type A, 3-pole, 36kA, 250A | MZ2C-A250 | MZ225431 |
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 160A | MZ2N-A160 | MZ216231 |
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 200A | MZ2N-A200 | MZ220231 |
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 250A | MZ2N-A250 | MZ225231 |
MZ SIZE 2: LOAD BREAK SWITCH 250A
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Load break switch, 3-pole, 250A | MZ2-N-250 | MZ225035 |
MZ SIZE 3: 315 up to 400A with thermomagnetic release
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 315A | MZ3N-A315 | MZ332231 |
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 400A | MZ3N-A400 | MZ340231 |
MZ SIZE 3: 315 up to 400A with thermomagnetic release
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 315A | MZ3N-A315 | MZ332231 |
| Moulded Case Circuit Breaker type A, 3-pole, 50kA, 400A | MZ3N-A400 | MZ340231 |
MZ SIZE 3: 250 up to 630A with delayed electronic release
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Moulded Case Circuit Breaker type VE, 3-pole, 70kA, 250A | MZ3H-VE250 | MZ325333 |
| Moulded Case Circuit Breaker type VE, 3-pole, 70kA, 400A | MZ3H-VE400 | MZ340333 |
| Moulded Case Circuit Breaker type VE, 3-pole, 70kA, 630A | MZ3H-VE630 | MZ363333 |
MZ SIZE 3: LOAD BREAK SWITCH 400A
| DESCRIPTION | TYPE NO | ORDER NO |
|---|---|---|
| Load break switch, 3-pole, 400A | MZ3-N-400 | MZ340035 |
LOW VOLTAGE EQUIPMENT
🔶 MCCB MZ SERIES ACCESSORIES
| DESCRIPTION | TYPE NO | ORDER NO. |
|---|---|---|
| MZ Size 1 – Accessories | ||
| Auxiliary contact normal 1 C/O for MZ | MZ-AN11 | MZAZAN11 |
| Auxiliary contact trip 1 C/O for MZ | MZ-AT11 | MZAZAT11 |
| Set of terminal covers long for MZ1 3-pole | MZ1-CL03 | MZ1ZCL03 |
| 6 Box terminals 4-95mm² for MZ1 3-pole | MZ1-BT03 | MZ1ZBT03 |
| Mechanical interlock for MZ1 3-pole | MZ1-JM03 | MZ1ZJM03 |
| Padlock for MZ1 | MZ1-LL00 | MZ1ZLL00 |
| Remote operator 230VACDC for MZ1 | MZ1-M230 | MZ1ZM230 |
| Direct rotary handle (lockable) for MZ1 | MZ1-RD | MZ1ZRD00 |
| Extended rotary handle (lockable) for MZ1 3-pole | MZ1-REE3 | MZ1ZREE3 |
| Shunt release 230VAC for MZ1 | MZ1-S230 | MZ1ZS230 |
| Undervoltage release 230VAC for MZ1 | MZ1-U230 | MZ1ZU230 |
MZ Size 2 – Accessories
| Description | Type No | Order No |
|---|---|---|
| Auxiliary contact normal 1 C/O for MZ | MZ-AN11 | MZAZAN11 |
| Auxiliary contact trip 1 C/O for MZ | MZ-AT11 | MZAZAT11 |
| Set of terminal covers long for MZ2 3-pole | MZ2-CL03 | MZ2ZCL03 |
| 6 Front connection plates for MZ2 | MZ2-FC03 | MZ2ZFC03 |
| Mechanical interlock for MZ2 3-pole | MZ2-JM03 | MZ2ZJM03 |
| Padlock for MZ2 | MZ2-LL00 | MZ2ZLL00 |
| Remote operator 230VACDC for MZ2 | MZ2-M230 | MZ2ZM230 |
| Direct rotary handle (lockable) for MZ2 | MZ2-RD | MZ2ZRD00 |
| Extended rotary handle (lockable) for MZ2 3-pole | MZ2-REE3 | MZ2ZREE3 |
| Shunt release 230VAC for MZ2/3 | MZ2/3-S230 | MZ2ZS230 |
| 6 Tunnel terminals 2 x (35–120mm²) for MZ2 | MZ2-TT03 | MZ2ZTT03 |
| Undervoltage release 230VAC for MZ2/3 | MZ2/3-U230 | MZ2ZU230 |
MZ Size 3 – Accessories
| Description | Type No | Order No |
|---|---|---|
| Auxiliary contact normal 1 C/O for MZ | MZ-AN11 | MZAZAN11 |
| Auxiliary contact trip 1 C/O for MZ | MZ-AT11 | MZAZAT11 |
| Set of terminal covers long for MZ3 3-pole | MZ3-CL03 | MZ3ZCL03 |
| 6 Front connection plates for MZ3 3-pole | MZ3-FC03 | MZ3ZFC03 |
🔶 CIRCUIT BREAKER – MINIATURE CIRCUIT BREAKER (MCB)
📌 Description
- Insulated terminal guide for secure connection
- Lift and clamp terminals on both sides
- High selectivity by low let-through energies
- Window with positively-driven contact position indicator for each pole
- Terminal cross-section: 1 mm² – 25 mm²
- Meets the requirements for insulation coordination, contact gap 4 mm
- Mains power connection selectable (top/bottom)
- Installation not dependent on position
- Special latching snap-on mounting for DIN rail EN 50 022
TECHNICAL DATA
| Technical Specification | Details |
|---|---|
| Rated voltage/frequency | 230 V/400 V AC, 50/60 Hz |
| Rated breaking capacity DC (per pole with release) | max. 48 V DC |
| Tripping temperature | -5°C to +40°C |
| Operating temperature | -40°C to +75°C |
| Permissible back-up fuse | 125 A gG max, >10 kA |
| Selectivity class | 3 |
| Rated breaking capacity | 4.5 kA acc. to IEC/EN 60898 |
| Degree of protection | IP 20 |
| Tripping characteristics | B, C |
| Endurance | > 8,000 operating cycles (mechanical > 20,000) |
| Finger and hand touch safe | acc. to ÖVE EN 6, BGV A3 |
| Terminals | Double clamp / lift terminal |
| Terminal cross-section | 1 – 25 mm² (except 1P+N on 1MW) |
| Terminal width 1 MW | 17.8 mm |
| Terminal tightening torque | 2–2.4 Nm |
| Mounting | on DIN rail by latching snap-on mounting |
🔶 MINIATURE CIRCUIT BREAKER (MCB) – AMPARO SERIES – 6kA
| Rating | Single Pole | Single Pole + N | Double Pole | Three Pole | Three Pole + N |
|---|---|---|---|---|---|
| 2A | AM617102 | ||||
| 4A | AM617104 | ||||
| 6A | AM617106 | AM617606 | AM617206 | AM617306 | AM617806 |
| 10A | AM617110 | AM617610 | AM617210 | AM617310 | AM617810 |
| 13A | AM617113 | AM617613 | AM617213 | AM617313 | AM617813 |
| 16A | AM617116 | AM617616 | AM617216 | AM617316 | AM617816 |
| 20A | AM617120 | AM617620 | AM617220 | AM617320 | AM617820 |
| 25A | AM617125 | AM617625 | AM617225 | AM617325 | AM617825 |
| 32A | AM617132 | AM617632 | AM617232 | AM617332 | AM617832 |
| 40A | AM617140 | AM617640 | AM617240 | AM617340 | AM617840 |
| 50A | AM617150 | AM617650 | AM617250 | AM617350 | AM617850 |
| 63A | AM617163 | AM617663 | AM617263 | AM617363 | V |
🔶 MCB TRIPPING CURVE
🔶 MCB LET-THROUGH ENERGY
🔶 CIRCUIT BREAKER – RESIDUAL CURRENT CIRCUIT BREAKER (RCCB)
📌 Description
- Tripping indicator (electr. tripping with red indication)
- Lift and clamp terminals on both sides
- Terminal guide for secure connection
- Terminal cross-section: 1–25 mm²
- Snap-on mounting for DIN rail EN 50 022
- VDE certificate
🔶 TECHNICAL DATA
| Specification | Details |
|---|---|
| Standards | 2IEC/EN 61008-1 |
| Poles | 2, 4 |
| Type | AC, A |
| Delay-type | G, S |
| Rated voltage (AC) | 230/400 V AC |
| Rated frequency (AC) | 50/60 Hz |
| Rated current In | 25A, 40A, 63A |
| Rated sensitivity IΔn | 0.03A, 0.1A, 0.3A |
| Rated impulse withstand voltage (1.2/50) Uimp | 6kV |
| Dielectric test voltage at ind. freq. for 1 min. | 2.5 kV |
| Insulation voltage Ui | 500 V |
| Short-circuit current Inc = IΔn | 6000/10000 A |
| Certificate | VDE for Typ A in 2 pole version |
| Pollution degree | 2 |
| Electrical endurance | > 2,000 operating cycles |
| Mechanical endurance | > 2,000 operating cycles |
| Contact position indicator | Yes |
| Protection degree | IP 20 |
| Ambient temperature daily average ≤ 35°C | -5°C to +40°C |
| Operating temperature | -25°C to +70°C |
| Terminal connection type | cable / U-type busbar / pin-type busbar |
| Connection | from top and bottom |
| Terminal cross-section | 35 mm² |
| Terminal tightening torque | 2.5 Nm |
| Mounting | on DIN rail EN 60715 (35 mm) by fast clip device |
🔶 RESIDUAL CURRENT CIRCUIT BREAKER (RCCB), AMPARO SERIES
| Rating | Pole | Sensitivity | Breaking Capacity | Order Number |
|---|---|---|---|---|
| 25A/2/0.03A | 2 | 30 mA | 10 kA | AR052203 |
| 40A/2/0.03A | 2 | 30 mA | 10 kA | AR054203 |
| 63A/2/0.03A | 2 | 30 mA | 10 kA | AR056203 |
| 25A/4/0.03A | 4 | 30 mA | 10 kA | AR052103 |
| 40A/4/0.03A | 4 | 30 mA | 10 kA | AR054103 |
| 63A/4/0.03A | 4 | 30 mA | 10 kA | AR056103 |
| 25A/2/0.3A | 2 | 300 mA | 10 kA | AR002230 |
| 40A/2/0.3A | 2 | 300 mA | 10 kA | AR004230 |
| 63A/2/0.3A | 2 | 300 mA | 10 kA | AR006230 |
| 25A/4/0.3A | 4 | 300 mA | 10 kA | AR002130 |
| 40A/4/0.3A | 4 | 300 mA | 10 kA | AR004130 |
| 63A/4/0.3A | 4 | 300 mA | 10 kA | AR006130 |
🔶 RCCB TRIPPING CURVES
