English
IEC60947-2
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Classification
- Classified by installation method: Fixed type;
- Classified by operation method: Electric opeation; manual operation(for inspection and maintenance)
- Classified by poles number: 3 poles; 4 poles;
- Classified by wiring method: Upper inlet and lower outlet; lower inlet and upper outlet;
horizaontal inlet and outlet; horizontal extended inlet and outlet;
- Classified by intelligent over-current controller: H(liquidcrystal communication), M(liquid cystsal), L(digitaltube)
Technical Data
Rated current specifications of circuit breakers
Frame rating current lnm(A) | Rated current ln(A) |
| 1600 | 200, 400, 500, 630, 800, 1000, 1250, 1600 |
Circuir breaker basic parameter
| Model | Frame rating current lnm(A) | Rated voltage Ue(V) | Rated limit short-circuit breaking capacity | Rated service short-circuit breaking capacity | Rated short-circuit withstand current | Ui(V) | |||
| Icu kA | cos | Ics kA | cos | Icw | |||||
| ASKW2-BQ-1600 | 1600 | 400/415 | 50Hz | 65 | 0.25 | 65 | 0.25 | 65kA/1s | 1000 |
| 660/690 | 55 | 55 | 55kA/1s | ||||||
Circuit breaker operating performance
| lnm(A) | Number of operation cycles per hour | Number of cycles of operation powered on | Number of cucycles of operation not powered on | Total |
| 1600 | 20 | 500 | 2500 | 3000 |
Operational voltage of shunt tripper, under voltage tripper, electric operaiting tripper, energy release(closing electromagnet, intelligent controller)
| Category | Rated voltage | AC 50Hc(V) | DC(V) |
| shunt tripper | Us | 230, 400 | 110, 220 |
| Under voltage tripper | Us | 230, 400 | - |
| Electric operating mechanism | Us | 230, 400 | 110, 220 |
| Energy release(closing) electromagnet | Us | 230, 400 | 110, 220 |
| Intelligent controller | Us | 230, 400 | 110, 220 |
Auxiliary contact paeameters
| Rated voltage Us(V) | Convened heating currentlth(A) | Rated control capacity |
| AC 230/400 | 6 | 300VA |
| DC 220/110 | 60W |
Power-supply Module
| When the input power voltage of the intelligent controller is not stable enough or fluctuates frequently, the external power supply module must be selected.External power supply module is divided into DC and Ac two types, AC input for Ac230V/400V,Dc input for DC 220V/110V,output for Dc 24V,0.4A.35mm standard guide rail and direct fixing two installation methods. Outline and installation dimensions (see Figure 1). |  |
Disconnect position key lock
The circuit breaker has "open position key lock" accesory (supplied according to the ordering requirements), which can lock the circuit breaker in the open position, at this time, no matter with the closing buton or release (closing) solenoid can't make the circuit breaker close.
Tripper current setting value Ir and tolerance
| Long-time delay | Short-time delay | Instantaneous | Earthing fault | ||||
| Ir 1 | Error | Ir2 | Error | Ir3 | Error | Ir4 | Error |
| (0.4~1)ln | ±10% | (3~10)ln | ±10% | (3~15)ln | ±10% | (0.2~0.8)ln | ±10% |
Note:
1. lrl in the table indicates the long delay protection rectification current, 12 indicates the short delay protection rectification current, 13 indicates the instantaneous protection rectification current, and r4 indicates the grounding protection rectification current.
2. When used for 690v, the maximum setting value ofinstantaneous protection setting current is 10kA,
3. When there are three protection stages, the setting value cannot be crossed, and lr1<lr2<lr3.
Characteristics of long delay overcurrent protection(tripper action time T(L type))
| Voltage | Action time(s) | Error | |||
| 1.05Ir1 | ＞2h No action | ±15% | |||
| 1.3Ir1 | ＜1h Action | ||||
| 1.5Ir1 | 30 | 60 | 1210 | 240 | |
| 2.0Ir1 | 60 | 33.7 | 67.5 | 135 | |
Note: The time of 2.0 Ir 1 is calculated as I²T=(1.5Ir1)²tL, where the action time of 1.5 Ir1 is set by the user.
Characteristics of short delay overcurrent protection(short delay protection current setting value)
| Short-delay protection current setting value t2(s) | 0.2 | 0.4 | Error |
| Maximum breaking time(s) | 0.23 | 0.46 | ±10% |
| No Detrip Duration(s) | 0.14 | 0.33 |
The L-type controller is a special r. When the overload current I exceeds the set value tsd, the controller shall press the first gear delay in 0.2s and 0.4s respecctively.
Ground fault protection characteristics(ground fault time setting value)
| Ground fault time setting value t4(s) | OFF | 0.1 | 0.2 | 0.3 | 0.4 |
| Maximum breaking time(s) | - | 0.11 | 0.23 | 0.32 | 0.46 |
| No Dettrip Duration(s) | - | 0.06 | 0.14 | 0.24 | 0.33 |
| Setting value by ground fault time t4 see Table 10. The time setting value of grounding fault is "OFF" | |||||
| Note: The setting value of grounding fault time of L-type tripping is 0.2s, 0.4s optional. | |||||
Ground leakage protection is due to the leakage curent ofthe equipment to the earth, which is a protective function ofthe protection equipment. According to the size of the equipment leakage current and different protection requirements and divided into two protection functions:
| (1)Internaltransformer vectorand mode (grounding protection), controller According to the three. phase current and neutral electrode current vectorand protection,the breaker poles are 3 PT, 3 PT, (3P + N) T e.g.,seeFigure2. |  |
| (2)Externalleakage transfomer (leakageprotection),the controller directly takeThe output current signal ofan additiona!currenttransformeris protected,and thisschemeis highly sensitive,especiallysuitable forthe protection ofseveral amps.There are two ways to sample thegrounding signal.Figure 3 Methods 1 and2 sample the rectangulartransformer3 for the ringtransformer sampling. |  |
Qualification Documents
FAQ
1: What is an ACB?
ACB stands for Air Circuit Breaker, also known as an Intelligent Universal Circuit Breaker. It is a high-performance low-voltage protection device used for main incoming, bus tie, and large feeder circuits in electrical distribution systems. It provides protection functions like long-time, short-time, instantaneous, and ground fault, and typically features communication capabilities.
2: What do "Front-Accessible" and "Rear-Accessible" termination mean?
These terms refer to two distinct methods for wiring and installing the ACB, defining where the power cable connections are made relative to the panel mounting plate.
- Front-Accessible Termination: All electrical connections (for both line and load sides) are made from the front of the panel. The breaker is designed to be wired after it is fully installed and secured in place.
- Rear-Accessible Termination: This is the more common or "standard" termination style. The breaker's connection terminals face the rear of the panel (inside the enclosure). Wiring must be completed before the breaker is installed or by working inside the panel behind the mounting plate.
3. What is the key difference between the two types?
The primary difference lies in ease of maintenance and operational convenience, particularly for live systems.
| Feature | Front-Accessible ACB | Rear-Accessible (Standard) ACB |
| Connection Point | At the front of the panel, facing the operator. | At the rear of the panel, inside the enclosure. |
| Maintenance & Service | Excellent. Allows for ** isolation and maintenance** without de-energizing the entire panel or removing the breaker. The plug-in system can be disconnected from the front. | Poor. To safely access terminals, the breaker must often be fully de-energized, withdrawn to the "isolated" position, and sometimes completely removed. |
| Panel Design | Requires less panel depth, as no rear service access space is needed. | Requires greater panel depth to provide space for wiring and potential rear access. |
| Safety | Higher. All live parts are accessible and visible from the front, reducing the risk of accidental contact with unseen energized parts in the panel rear. | Standard. Risk of contact with other live components exists when working inside the panel for wiring. |
| Cost | Higher. The breaker and its plug-in/disconnect mechanism are more complex. | Lower. This is the standard design, making it more cost-effective. |
| Primary Application | Mission-critical systems where power continuity is paramount (e.g., data centers, hospitals, core production lines); allows for online maintenance. | General-purpose industrial and commercial power distribution where maintenance can be performed during planned outages. |
4. How does a Front-Accessible ACB enable maintenance without a full power shutdown?
Front-accessible ACBs are typically part of a Plug-in or Draw-out system. Even when the breaker is mounted, its main power connections are made to a fixed mounting frame. Using a special tool, an operator can disconnect the breaker from this fixed frame from the front side, effectively isolating it from the power circuit without needing to de-energize the busbars in the panel.
5. How should I choose for my project?
Your choice should be based on:
- Criticality of Power Supply: Can the system tolerate a planned outage for maintenance? If not, front-accessible is the preferred choice
- Budget: Front-accessible breakers and their associated hardware come at a higher initial cost. Weigh this against the value of reduced downtime and easier maintenance.
- Panel Space: If panel depth is a constraint, front-accessible termination can be a space-saving solution.
- Safety Standards: Certain industry or regional safety protocols may influence the choice of termination type.
