CQM6E Electronic Adjustable MCCB OEM Manufacturer
The CQM6E MCCB provides adjustable overload, short circuit and ground-fault protection within its published 32–1250A range. Specification should follow the system voltage, load, conductor coordination, prospective fault current and applicable rules—not the ampere value alone.
Product Overview
CQM6E is a mccb circuit breaker for AC 400/415V distribution and protection applications. Its published range covers 32–1250A with 3P / 4P options. Selection depends on the complete power-system design, including fault level, coordination, conductor ampacity, enclosure conditions and local rules.
The supplied product specification references IEC/EN 60947-1, IEC/EN 60947-2, IEC/EN 60947-3 and IEC/EN 60947-4, together with GB/T 14048.1, .2, .3 and .4. These standard references do not, by themselves, establish certification for a particular order.
Key Features
Typical Applications
Typical applications include industrial automation, critical feeders and systems that require adjustable selectivity or monitoring. These are evaluation contexts rather than universal approvals. Confirm the exact frame, voltage, breaking duty, trip unit, accessories and installation method before specification.
Applications and Selection Guide
Use the verified CQM6E values below to create a shortlist, then validate the complete circuit. An MCCB rating does not replace conductor calculations, fault-current analysis, coordination review or local installation requirements.
| Selection point | CQM6E reference | What the project must confirm |
|---|---|---|
| Rated current | 32–1250A | Design current, conductor ampacity, installation method, temperature and grouping |
| Voltage | AC 400/415V | Supply system and equipment rating |
| Poles | 3P / 4P | Live conductors and neutral treatment |
| Trip / protection | adjustable electronic L-S-I-G protection | Load profile, fault response and coordination |
| Breaking capacity | S/M/H classes up to 75kA, according to frame and ordered configuration | Prospective short-circuit current at the installation point |
Electronic vs Thermal-Magnetic Trip
Electronic trip units can provide adjustable thresholds and additional monitoring functions. Confirm the actual setting range, auxiliary supply and coordination study for the ordered model.
Protection Settings
Review Electronic MCCBs →
MCCB vs MCB
An MCCB is normally evaluated for higher current, fault duty or accessory flexibility; an MCB may be more suitable for compact final circuits.
Current & Fault Duty
Compare MCCB and MCB →
Icu vs Ics
The saved data for CQM6E lists S/M/H classes up to 75kA, according to frame and ordered configuration. Match the declared duty to the prospective short-circuit current and continuity objective.
Short-Circuit Study
Review Technical Support →
Pole and Neutral Arrangement
Published pole options are 3P / 4P. Confirm which conductors must be switched, protected and isolated together.
System Arrangement
View MCCB Range →
Ordering Guide
- State the exact model: CQM6E.
- Provide frame and rated current within the published range: 32–1250A.
- Confirm poles: 3P / 4P.
- Specify the trip unit or protection function: adjustable electronic L-S-I-G protection.
- Provide system voltage, frequency, application, expected fault level, destination market and quantity.
- List required accessories, terminals, documents and any approved OEM/ODM marking or packaging requirements.
Installation and Coordination Checks
- Use the exact model drawing and instructions; do not infer terminal positions, supply direction or accessory compatibility from another MCCB.
- Verify conductor material and cross-section against the circuit calculation, terminal data, temperature and grouping.
- Confirm Icu/Ics or DC fault duty, upstream/downstream coordination, enclosure conditions, altitude and clearances.
- Installation, isolation, testing and maintenance must be performed by qualified personnel under applicable rules.
Selection Guide
| Product code ① | Shell frame grade ② | Shell frame grade ③ | Breaking capacity ④ | |||
|---|---|---|---|---|---|---|
| CQM6 | E | 160 | S | M | H | |
| Molded case circuit breaker | E Electronically Adjustable |
160 | 160 | / | 50/35 | 50/50 |
| 250 | 250 | / | 50/35 | 50/50 | ||
| 400 | 400 | 35/25 | 50/35 | 70/50 | ||
| 630 | 630 | 35/25 | 50/35 | 70/50 | ||
| 800 | 800 | 35/25 | 50/35 | 70/50 | ||
| 1250 | 1250 | / | 50/35 | 70/55 | ||
| Operating method ⑤ | Number of poles ⑤ | Trip Unit &Accessories ⑥ | Rated current A ⑦ |
|---|---|---|---|
| P | 3 | 400 | 160A |
| P:Motorized operation Z:Turn the handle W:Direct operation |
160A:3P,4P 250A:3P,4P 400A:3P,4P 630A:3P,4P 800A:3P,4P 1250A:3P,4P 1600A:3P,4P |
2:Intelligent disconnectors Note:The last two digits are the accessory code (see attachment) |
160,250,400,630,800,1000,1250 |
| Function ⑧ | 4P Option Code ⑨ | Special code ⑩ |
|---|---|---|
| 2 | A | I |
| 1:For power distribution 2:For motor protection |
A:N-pole without protection,can not be combined B:N-pole without protection,can be combined C:N-pole with protection,can be combined D:N-pole with protection,can not be combined Note:If the customer does not have a clear request,four-pole products will be defaulted to the B category |
I:Overload alarm non trip function |
Accessory List
Main Technical Parameters
| Model number | CQM6E-160 | CQM6E-250 | ||||
|---|---|---|---|---|---|---|
| Rated current of frame level Inm(A) | 160 | 250 | ||||
| Number of poles | 3,4 | 3,4 | ||||
| Rated current In(A),at 40°C,50°C,55°C | 32,63,125,160 | 160,250 | ||||
| Rated operating voltage Ue(V),AC 50/60Hz | 400/415 | 400/415 | ||||
| Rated insulation voltage Ui (V) | 800 | 800 | ||||
| Rated impulse withstand voltage Uimp(KV) | 8 | 8 | ||||
| Breaking capacity designation | M | H | M | H | ||
| Short-circuit breaking capacity Icu/Ics(kA) | AC400/415V | 50/35 | 50/50 | 50/35 | 50/50 | |
| Rated short-time withstand current Icw(kA),1s | AC400/415V | 2 | 2 | 5 | 5 | |
| Selectivity category | B | B | B | B | ||
| Number of operating cycles | ON | 6000 | 6000 | |||
| OFF | 10000 | 10000 | ||||
| Electronic decouping (adjustable) |
Power distribution protection | ● | ● | ● | ● | |
| Motor protection | ● | ● | ● | ● | ||
| Accessory | Auxiliary contacts | ● | ● | ● | ● | |
| Alarm contacts | ● | ● | ● | ● | ||
| Shunt disconnect | ● | ● | ● | ● | ||
| Undervoltage detent | ● | ● | ● | ● | ||
| Manual operating mechanism | ● | ● | ● | ● | ||
| Motorized operating mechanism | ● | ● | ● | ● | ||
| Backplane wiring | ● | ● | ● | ● | ||
| Inserted | ● | ● | ● | ● | ||
| Coupling plate | ● | ● | ● | ● | ||
| Partition between phases | ● | ● | ● | ● | ||
| Overall dimensions (mm) (a-b-c-ca) |
 |
3 P | 90×155×85×109 | 105×165×93×119 | ||
| 4 P | 120×155×85×10 | 140×165×93×119 | ||||
Note: ● indicates an available optional accessory; – indicates that the accessory is not available.
| Model number | CQM6E-400 | CQM6E-630 | ||||||
|---|---|---|---|---|---|---|---|---|
| Rated current of frame level Inm(A) | 630 | 630 | ||||||
| Number of poles | 3,4 | 3,4 | ||||||
| Rated current In(A),at 40°C,50°C,55°C | 400 | 400,630 | ||||||
| Rated operating voltage Ue(V),AC 50/60Hz | 400/415 | 400/415 | ||||||
| Rated insulation voltage Ui (V) | 800 | 800 | ||||||
| Rated impulse withstand voltage Uimp(KV) | 8 | 8 | ||||||
| Breaking capacity designation | S | M | H | S | M | H | ||
| Short-circuit breaking capacity Icu/Ics(kA) | AC400/415V | 35/25 | 50/35 | 70/50 | 35/25 | 50/35 | 70/50 | |
| Rated short-time withstand current Icw(kA),1s | AC400/415V | 8 | 8 | 8 | 8 | 8 | 8 | |
| Selectivity category | B | B | B | B | B | B | ||
| Number of operating cycles(circle) | ON | 3000 | 3000 | |||||
| OFF | 8000 | 8000 | ||||||
| Electronic decouping (adjustable) |
Power distribution protection | ● | ● | ● | ● | ● | ● | |
| Motor protection | ● | ● | ● | ● | ● | ● | ||
| Accessory | Auxiliary contacts | ● | ● | ● | ● | ● | ● | |
| Alarm contacts | ● | ● | ● | ● | ● | ● | ||
| Shunt disconnect | ● | ● | ● | ● | ● | ● | ||
| Undervoltage detent | ● | ● | ● | ● | ● | ● | ||
| Manual operating mechanism | ● | ● | ● | ● | ● | ● | ||
| Motorized operating mechanism | ● | ● | ● | ● | ● | ● | ||
| Backplane wiring | ● | ● | ● | ● | ● | ● | ||
| Inserted | ● | ● | ● | ● | ● | ● | ||
| Coupling plate | ● | ● | ● | ● | ● | ● | ||
| Partition between phases | ● | ● | ● | ● | ● | ● | ||
| Overall dimensions (mm) (a-b-c-ca) |
|
3 P | 140×257×108×156 | 140×257×108×156 | ||||
| 4 P | 185×257×108×156 | 185×257×108×156 | ||||||
Note: ● indicates an available optional accessory; – indicates that the accessory is not available.
| Model number | CQM6E-800 | CQM6E-1250 | |||||
|---|---|---|---|---|---|---|---|
| Rated current of frame level Inm(A) | 800 | 1250 | |||||
| Number of poles | 3,4 | 3,4 | |||||
| Rated current In(A),at 40°C,50°C,55°C | 630,800 | 800,1000,1250 | |||||
| Rated operating voltage Ue(V),AC 50/60Hz | 400/415 | 400/415 | |||||
| Rated insulation voltage Ui (V) | 800 | 1000 | |||||
| Rated impulse withstand voltage Uimp(KV) | 8 | 12 | |||||
| Breaking capacity designation | S | M | H | M | H | ||
| Short-circuit breaking capacity Icu/Ics(kA) | AC400/415V | 35/25 | 50/35 | 70/50 | 50/35 | 75/55 | |
| Rated short-time withstand current Icw(kA),1s | AC400/415V | 10 | 10 | 10 | 12.5 | 12.5 | |
| Selectivity category | B | B | B | B | B | ||
| Number of operating cycles (cycle) | ON | 1000 | 1000 | ||||
| OFF | 3000 | 3000 | |||||
| Electronic decouping (adjustable) | Power distribution protection | ● | ● | ● | ● | ● | |
| Motor protection | ● | ● | ● | ● | ● | ||
| Accessory | Auxiliary contacts | ● | ● | ● | ● | ● | |
| Alarm contacts | ● | ● | ● | ● | ● | ||
| Shunt disconnect | ● | ● | ● | ● | ● | ||
| Undervoltage detent | ● | ● | ● | ● | ● | ||
| Manual operating mechanism | ● | ● | ● | ● | ● | ||
| Motorized operating mechanism | ● | ● | ● | ● | ● | ||
| Backplane wiring | ● | ● | ● | ● | ● | ||
| Inserted | ● | ● | ● | ● | ● | ||
| Coupling plate | ● | ● | ● | ● | ● | ||
| Partition between phases | ● | ● | ● | ● | ● | ||
| Overall dimensions (mm) (a-b-c-ca) |
|
3 P | 210×275×114×163 | 210×275×114×163 | |||
| 4 P | 280×275×114×163 | 280×275×114×163 | |||||
Note: ● indicates an available optional accessory; – indicates that the accessory is not available.
Characteristic curve
Intelligent Release Adjustment Panel
1.Ir: Rated Current (Ir) Setting Dial
The setting dial for the rated current, applicable to 160-1250 frame sizes. The selectable settings on the front panel are: 0.4, 0.45, 0.5, 0.55, 0.6, 0.7, 0.8, 0.9, 1.0, OFF.
2.Tr: Long-Time Delay (Tr) Setting Dial
The setting dial for the overload long-time delay. When the current passing through the circuit breaker reaches 1.5 times Ir (×In), the breaker trips within the set time. The selectable settings are: 8s, 12s, 16s, 24s, 32s, 48s, 64s, 96s, 128s, 256s.
3.Isd: Short-Time Delay Current (Isd) Setting Dial
The setting dial for the short-time delay current multiplier. Selectable settings are: 2, 3, 4, 5, 6, 7, 8, 9, 10, OFF. When a short-circuit current equal to the set value (×Ir, ×In) passes through the breaker, it will trip after a time delay.
4.Tsd: Short-Time Delay Operating Time (Tsd) Setting Dial
The setting dial for the short-time delay operating time. It is divided into inverse-time protection (I²t ON) and definite-time protection (I²t OFF). Selectable settings are: 0.05s, 0.1s, 0.15s, 0.2s, 0.3s. When a short-circuit current equal to Isd passes through the breaker, it will trip within the set time.
5.Ii: Instantaneous Current (Ii) Setting Dial
The setting dial for the instantaneous current multiplier. Selectable settings are: 2, 3, 4, 5, 6, 8, 9, 10, 12. When a short-circuit current equal to the set value (×In) passes through the breaker, it will trip instantaneously.
6.Ip: Pre-alarm Current (Ip) Setting Dial
The setting dial for the pre-alarm current multiplier. Selectable settings are: 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, OFF. When the current passing through the breaker reaches the set value (×Ir, ×In), the pre-alarm indicator light will illuminate.
7.Ig: Ground Fault Current (Ig) Setting Dial
The setting dial for the ground fault current multiplier. Selectable settings are: 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, OFF. When the ground fault current passing through the breaker reaches the set value (×In), the breaker will trip due to the ground fault.
The intelligent release provides adjustable overload long-time inverse-time protection, short-circuit short-time inverse-time or definite-time protection, and instantaneous protection. The following table gives the long-time overcurrent characteristics.
| Current | time of action | ||
|---|---|---|---|
| power distribution |
1.05Ir | >2h inoperative(In>63A),1h inoperative (In≤63A) | |
| 1.3r | <1h action | ||
| 1.5Ir | Settling time tr(s) | Inm-125A、250A、400A、630A、800A、1250A | |
| 8、12、16、24、32、48、64、96、128、256 | |||
Remarks: Operating-current tolerance is ±10%; operating-time tolerance is ±15%.
Short-Time Overcurrent Protection Characteristics
With I²t ON, short-time protection uses an inverse-time characteristic.
| Current | time of action | |||||
|---|---|---|---|---|---|---|
| I≤Isd≤6Ir counter-time limit | I²T2=(6XIr)² Tsd | |||||
| I>Isd and I>6Ir Inverse time limit to fixed time limit |
Consolidation time | 0.05 | 0.1 | 0.15 | 0.2 | 0.3 |
| Inaccuracies | ±0.02 | ±0.03 | ±0.04 | ±0.06 | ±0.08 | |
| Returnable time | – | – | 0.14 | 0.21 | 0.3 | |
I is the actual current, T2 is the actual operating time, Isd is the short-time current setting and Tsd is the short-time delay setting.
With I²t OFF, short-time protection uses a definite-time characteristic.
| Current | time of action | |||||
|---|---|---|---|---|---|---|
| l≥Isd Current Error±10% | Consolidation time | 0.05 | 0.1 | 0.15 | 0.2 | 0.3 |
| Inaccuracies | ±0.02 | ±0.03 | ±0.04 | ±0.06 | ±0.08 | |
| Returnable time | – | – | 0.14 | 0.21 | 0.3 | |
I is the actual current, T2 is the actual operating time, Isd is the short-time current setting and Tsd is the short-time delay setting.
Instantaneous Short-Circuit Protection Characteristics
| Current | li=(2,3,4,5,6,8,9,10,12)×ln | |
|---|---|---|
| Motion Characteristics | Operating current | Minimum operating current 0.9li Maximum inoperative current 1.1li |
| time of action | <0.1s | |
Ground-Fault Protection Characteristics
| Current | Ig=(0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0)×ln | |
|---|---|---|
| Motion Characteristics | Ig≤0.9lg Circuit breaker inoperative | Ig>1.1lg |
| time of action | Tg=0.4(fixed time limit) | |
Electronic Release Panel Indicators
Overload Pre-Alarm Characteristics
| Load Current | I<1lp | I ≥ 1lp |
|---|---|---|
| Indicator status | Indicator ligh is not flashing,does not light up | Indicator light constant |
| Load Current | I<1.15lp | I ≥ 1.15lp |
|---|---|---|
| Indicator status | Indicator light is not on | Indicator ligh is on |
| Load Current | ≥0.4In(Single phase) | l≥0.2ln(Tri-phase) |
|---|---|---|
| Indicator status | Indicator light is on | Indicator light is on |
Note:
Note: The stated current tolerance is ±10%.
Select the pre-alarm threshold with the starting current and operating conditions in mind.
Outline and Installation Dimensions(mm)
| Molded case circuit breaker | Overall dimension | Installation dimensions | Boit | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | A1 | A2 | A3 | B | B1 | B2 | B3 | B5 | B6 | H | H1 | H2 | H3 | H4 | H5 | H6 | A4 | B4 | ||||||
| 3P | 4P | 3P | 4P | 3P | 4P | 3P | 4P | |||||||||||||||||
| CQM6E-160M | 90 | 120 | 60 | 90 | – | – | – | – | 155 | 134 | 103 | 50 | 48 | – | 109.2 | 90 | 2.2 | 84.9 | 23.6 | 23.6 | 24.9 | 30 | 132 | M8 |
| CQM6E-250M | 105 | 140 | 70 | 105 | – | – | – | – | 165 | 144 | 102 | 50 | 95 | – | 118.6 | 97.6 | 2.8 | 93.4 | 23.1 | 23.1 | 23.2 | 35 | 126 | M8 |
| CQM6E-400/630 SMH 400A | 140 | 185 | 88 | 132 | 140 | 196 | 112 | 168 | 257 | 230 | 179 | 90 | 103 | 42 | 156 | 112.1 | 3.5 | 107.5 | 30.9 | 30.9 | 32 | 44 | 194 | M10 |
| CQM6E-630SMH 630A | 140 | 185 | 88 | 132 | 140 | 196 | 112 | 168 | 257 | 230 | 179 | 90 | 103 | 42 | 156 | 112.1 | 3.5 | 107.5 | 33.4 | 33.4 | 34 | 44 | 194 | M10 |
| CQM6E-800SMH 630A | 210 | 280 | 140 | 210 | 180 | 250 | 140 | 210 | 275 | 243 | 192 | 90 | 103 | 87 | 162.5 | 118.4 | 2.7 | 114.3 | 28.5 | 28.5 | 30.7 | 70 | 242.5 | M12 |
| CQM6E-800SMH 800A | 210 | 280 | 140 | 210 | 180 | 250 | 140 | 210 | 275 | 243 | 192 | 90 | 103 | 87 | 162.5 | 118.4 | 2.7 | 114.3 | 29.5 | 29.5 | 32.7 | 70 | 242.5 | M12 |
| CQM6E-1250SMH | 210 | 280 | 140 | 210 | 180 | 250 | 140 | 210 | 275 | 243 | 192 | 90 | 103 | 87 | 162.5 | 118.4 | 2.7 | 114.3 | 31.50 | 31.5 | 34.7 | 70 | 242.5 | M10 |
Rear-Connected Installation Dimensions
Plug-In Installation Dimensions
| Molded case circuit breaker | B-board rear wiring dimensions | C Front-of-Board Wiring Dimensions | C Plug-in wiring size | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A1 | B | B1 | H | H1 | φd | φd1 | φd2 | φd3 | A4 | B4 | A | A1 | A2 | A3 | A4 | A5 | A6 | A7 | H | B | B1 | B2 | B3 | φd | H2 | H3 | |
| 125 | 25 | 114 | 111 | 62 | 87 | 6 | 14 | 5 | 5 | 25 | 111 | 130 | 58 | 115 | 132 | 17.5 | 20 | 58 | 97 | 28 | 75 | 50 | 50 | 77 | 5.5 | 15 | 10.5 |
| 160 | 30 | 134 | 132 | 72 | 112 | 8 | 18 | 5 | 5 | 30 | 132 | 155 | 60 | 134 | 173 | 38 | 40 | 60 | 98 | 50 | 92 | 60 | 60 | 94 | 6.5 | 31 | 19.5 |
| 250 | 35 | 144 | 126 | 87 | 126 | 12 | 24 | 5 | 5 | 35 | 126 | 165 | 54 | 144 | 184 | 45 | 47 | 54 | 95 | 50 | 107 | 70 | 70 | 109 | 6.5 | 35 | 21.5 |
| 400 | 44 | 230 | 194 | 83 | 136 | 18 | 35 | 7 | 7 | 44 | 194 | 257 | 125 | 225 | 280 | 55 | 57 | 125 | 169 | 60 | 140 | 87 | 60 | 142 | 9 | 32 | φ23 |
| 630 | 44 | 230 | 194 | 83 | 136 | 18 | 35 | 7 | 7 | 44 | 194 | 257 | 125 | 225 | 280 | 55 | 57 | 125 | 169 | 60 | 140 | 87 | 60 | 142 | 9 | 32 | φ23 |
| 800 | 70 | 243 | 243 | 174 | 243 | 26 | 48 | 7 | 7 | 70 | 243 | 275 | 147 | 242 | 42 | 55 | 58 | 147 | 190 | 91 | 218 | 140 | 107 | 222 | 10.5 | 31 | φ27 |
Plug-In Installation Dimensions
| Model Number | A | E | L2 | L3 | D | E | H | H1 | L | A1 | B1 | D1 | A2 | B2 | D2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 160 | 112 | 30 | 200 | 216 | 4.5 | 6.5 | 56 | 28 | 182 | 172 | 30 | 5.5 | 67 | 60 | 6.5 |
| 250 | 150 | 35 | 233 | 245 | 4.5 | 8.5 | 74 | 33 | 202 | 191 | 35 | 5.5 | 74 | 70 | 6.5 |
| 400 | 283 | 70 | 363 | 405 | 6.5 | 12.5 | 125 | 67 | 341 | 327 | 70 | 6.5 | 143 | 140 | 7 |
| 630 | 283 | 70 | 363 | 405 | 6.5 | 12.5 | 125 | 67 | 341 | 327 | 70 | 6.5 | 143 | 140 | 7 |
| 800 | 283 | 70 | 363 | 405 | 6.5 | 12.5 | 125 | 67 | 341 | 327 | 70 | 6.5 | 143 | 140 | 7 |
CQM6E internal accessories include undervoltage releases, shunt releases, auxiliary contacts and alarm contacts. Their technical parameters and wiring diagrams are shown below.
Undervoltage Release
| Internal accessories | |
|---|---|
| Rated voltage of the power supply | Main Performance |
| AC220,AC240 AC380,AC415 |
A. When the supply voltage drops to 70%and 35%of the rated voltage, the undervoltage detector shall operate. B. When the electro-hydraulic voltage is lower than 35%of the rated voltage,the undervoltage detractar should not be able to absorb,in order to prevent the circuit breaker from closing. C.When the power supply voltage is equal to or greater than 85% of the rated voltage,the undervoltage detractar will ensure the absorption, and ensure the reliable closing of the circuit breaker. |
| Shunt release device | |
|---|---|
| Rated supply voltage | Main Performance |
| DC24,DC110 AC220,AC3B0 |
The shunt release can operate reliably between 70%and 110%of the rated voltage value. |
| Auxiliary alarm contact | |
|---|---|
| Rated voltage of power supply | Main performance |
| Auxiliary switch AC 125V 5A,AC 250V 3A DC 125V 0.4A,DC 125V 0.2A |
Provides differentiated signals for circuit breakers in the"closed" and "open"positions. |
| Alarm switch AC 125V 5A,AC 250V 3A DC 125V0.4A,DC 125V 0.2A |
Provides signals to distinguish between "normal operation and "fault free release" positions of circuit breakers. |
| Auxiliary alarm switch AC 125V 5A.AC 250V 3A DC 125V 0.4A,DC125V 0.2A |
Provides signals to distinguish between "closed", "open" and "fault free release" positions of the circuit breaker. |
External Accessories
CD3 Motorised Operating Mechanism
The CD3 operating mechanism uses switching power-supply technology and a small permanent-magnet motor. The supplied accessory specification covers 63–800A moulded-case circuit breakers; confirm compatibility with the ordered frame.
| Model Number | CD3-125 | CD3-160 | CD3-250 | CD3-400/630 | DC3-800 | |
|---|---|---|---|---|---|---|
| Compatible Model |
CQM6-125 | CQM6-160 CQM6RT-160 CQM6R-160 |
CQM6E-250 CQM6-250 CQM6L-250 CQM6RT-250 |
CQM6-630 CQM6L-630 CQM6RT-630 CQM6E-630 |
CQM6-800 CQM6L-800 CQM6RT-800 CQM6E-800 CQM6L-1250 CQM6E-1250 |
|
| Overall Dimensions |
A | 25 | 30 | 35 | 44 | 70 |
| B | 117 | 132 | 126 | 194 | 243 | |
| C | 73 | 90 | 90 | 130 | 130 | |
| H | 98 | 98(89.5) | 102(92) | 152 | 153 | |
| Rated voltated V |
AC-110-240, DC100-220,DC24 |
AC 230,DC 220 AC 100,DC 110 |
||||
| Starting current A | ≤0.5 | ≤2 | ||||
| Mechanical life(times) | 14000 | 10000 | 5000 | |||
| Power(W) | 14 | 35 | ||||
Do not turn the manual operating mechanism anticlockwise.
For manual operation, insert the handle at the starting position and turn it 180° clockwise.
Manual Operating Mechanism
The following drawing shows the rotary handle and door-panel cut-out. The distance from the centre of the opening to the hinge must be at least 200mm.
Central Manual Operating Mechanism Dimensions
| Hand-operated mechanism model | A | B | C | D | H |
|---|---|---|---|---|---|
| 160 | 30 | 132 | 66 | 66 | 46 |
| 250 | 35 | 126 | 63 | 63 | 51 |
| 400 | 128 | 194 | 97 | 97 | 76 |
| 630 | 128 | 194 | 97 | 97 | 76 |
| 800 | 198 | 243 | 121.5 | 121.5 | 76 |
| 1250 | 198 | 243 | 121.5 | 121.5 | 76 |
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
For CQM6E projects, CHAC can review private-label marking, packaging, approved appearance options, published 32–1250A electrical configurations and technical-document requirements. Requests outside the published range are subject to engineering evaluation, testing, minimum order quantity and project feasibility.
Enclosure
Design
Customized enclosure sizes, structures and installation details.
Internal
Configuration
Flexible internal layout and component arrangement options.
Branding &
Logo
Private label logos, nameplates and brand identification.
Packaging
Design
Custom cartons, labels, manuals and packaging solutions.
Electrical
Configuration
Tailored electrical setup based on application requirements.
Certification
Support
Support for target-market standards and compliance requirements.
Download
CQM6 Series Moulded Case Circuit Breaker
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
CQM6E Product FAQ
What is the CQM6E MCCB used for?
The CQM6E is specified for adjustable overload, short circuit and ground-fault protection in AC 400/415V systems within the published 32–1250A range. Suitability depends on the fault study, conductor coordination, enclosure and local rules.
What does the electronic trip unit do in the CQM6E?
The electronic trip unit processes current signals and provides the adjustable protection functions stated for the model. Confirm the available long-time, short-time, instantaneous, ground-fault, auxiliary-power and communication options for the ordered configuration.
How do I choose the CQM6E rated current and poles?
Start with the design current and conductor calculation, then choose a published current within 32–1250A and poles from 3P / 4P. Neutral treatment, fault level, ambient conditions and coordination also need review.
What breaking capacity should I check on the CQM6E?
Use the declared S/M/H classes up to 75kA, according to frame and ordered configuration for the exact frame, voltage and configuration. The prospective short-circuit current at the installation point must be within the applicable duty; a larger ampere value alone is not a selection rule.
Can the CQM6E replace an MCB or an earth-leakage device?
An MCCB is not automatically a like-for-like replacement. The CQM6E provides adjustable overload, short circuit and ground-fault protection; residual-current protection, DC interruption, adjustable settings and other functions must be confirmed separately from the project requirement.
How should the CQM6E be installed and tested?
Use only the exact model drawing, terminal identification and accessory instructions. A qualified person should verify isolation, conductor size, torque, clearances, settings, fault duty and functional tests before energising the circuit.
Confirm the Right CQM6E Configuration
Send the frame, rated current, poles, protection function, system voltage, expected fault level, destination market and quantity. CHAC will review the request against the published model range.
