قاطع الدائرة المصغر CQB2-125
ال قاطع دارة مصغر CQB2-125 تم تصميمه لحماية الدوائر التوزيعية للتيار المتردد عالية التيار من الأحمال الزائدة والدوائر القصيرة. يتوفر بتصنيفات 63A و80A و100A و125A، مع منحنيات فصل C أو D، وتكوينات 1P أو 2P أو 3P أو 4P. تتمتع السلسلة بقدرة كسر قصوى للدائرة القصيرة تبلغ 10kA، وهي محددة وفقًا للمعيار IEC 60947-2. اختر التكوين المناسب وفقًا لتصميم الدائرة، والتيار المحتمل عند حدوث العطل، ومتطلبات الموصلات، والسوق المستهدف.
مواصفات المنتج
يُعد CQB2-125 قاطع دارة مصغر عالي التيار للتيار المتردد، مخصص لدوائر التوزيع التجارية والصناعية الخفيفة والبنية التحتية التي تتطلب حماية من الأحمال الزائدة والدوائر القصيرة. يتوفر بأصناف 63A و80A و100A و125A، مع منحنيات فصل C أو D، وتكوينات 1P و2P و3P أو 4P. توفر السلسلة تصنيفات قصر الدائرة 10kA Icu و7.5kA Ics، وهي مصممة وفقاً للمعايير IEC 60947-2 وGB/T 14048.2.
يجب أن يستند الاختيار إلى التيار التصميمي، وسعة الموصل، وترتيب الأعمدة، واندفاع الحمل، والتيار المفترض للاختصار، ومتطلبات سوق الوجهة. إن جهاز CQB2-125 هو منتج تيار متردد ولا ينبغي التعامل معه كبديل لقاطع تيار مستمر مصنّف، أو قاطع دارة حماية من التيار المتبقي (RCBO) ذي حماية من التيار المتبقي، أو قاطع دارة كهربائية ذات قدرة عالية على القطع (MCCB) المطلوب للحماية القابلة للضبط والأحمال العالية للاختصار.
الميزات الرئيسية
الاستخدامات النموذجية
يمكن تقييم CQB2-125 لحماية المغذيات والفرعيات ذات التيار الأعلى في اللوحات الكهربائية التجارية، وتوزيع الطاقة في المباني الشاهقة، ولوحات الصناعات الخفيفة، ومعدات البنية التحتية. وهو مناسب فقط عندما تتطابق القيم المختارة للتيار، ومنحنى التشغيل، وتكوين الأقطاب، وتصنيفات الدائرة القصيرة مع دراسة الدائرة. بالنسبة للدوائر عند 63A وما دونها، قارن بين CQB2-63; where adjustable settings or a higher interruption duty are required, review the مجموعة MCCB.
طلبات واقتراحات واختيار المرشحين
| مكون الاختيار | How to evaluate it | CQB2-125 options |
|---|---|---|
| التيار المقدر | Confirm design current, conductor capacity, installation method, ambient temperature, grouping and coordination. Do not select 125A simply because it is the highest available rating. | 63A, 80A, 100A, 125A |
| Tripping curve | Compare normal operating current, starting or inrush current and the fault-current level needed for timely magnetic operation. | C or D |
| عدد الأقطاب | Match the supply system and determine which live conductors must be switched and protected together under the project rules. | 1P، 2P، 3P، 4P |
| Short-circuit duty | Verify that the prospective short-circuit current and protection coordination are within the device ratings at the installation point. | Icu 10kA; Ics 7.5kA |
| Standard and documents | Check the product standard, destination-market rules and the exact documents required by the customer or approval body. | IEC 60947-2; GB/T 14048.2; CCC confirmed |
Compare current range, breaking capacity, tripping curves, pole configurations and protection functions before selecting a CQB2-125 miniature circuit breaker.
6kA vs 10kA MCB
Select breaking capacity according to the prospective short-circuit current at the installation point, not only the rated current of the circuit.
C Curve vs D Curve
Select the tripping curve according to the load’s inrush characteristics and the available fault current, not by current rating alone.
1P vs 2P vs 3P vs 4P
Choose the pole configuration from the supply arrangement and required common switching or isolation—not from panel space alone.
MCB مقابل RCBO
An MCB protects against overload and short circuit, while an RCBO also provides residual-current protection.
Need Help Selecting a CQB2-125 Configuration?
Share the rated current, pole configuration, tripping curve, system voltage, available fault-current information and quantity. CHAC will review the requested configuration and applicable documents.
CQB2-125 Ordering Guide
| Required information | Buyer selection |
|---|---|
| Product series | CQB2-125 |
| التيار المقدر | 63A / 80A / 100A / 125A |
| عدد الأقطاب | لاعب 1 / لاعبان / 3 لاعبين / 4 لاعبين |
| Tripping curve | ج / د |
| Project details | System voltage, application and available fault-current information |
| Commercial details | Quantity, destination market, marking, packaging and required documents |
Installation Details to Confirm
How to Choose Between C and D Curves
C and D curves respond differently to short-duration inrush current. C curve is commonly evaluated for general distribution loads with moderate inrush, while D curve may be considered for equipment with higher starting current. These are selection tendencies, not universal assignments. Confirm that the chosen curve tolerates normal starting current while still providing the required fault protection and disconnection time.
How to Choose the Pole Configuration
Select 1P, 2P, 3P or 4P from the actual supply and isolation requirements. The design must identify which conductors require protection and common switching. Neutral treatment, earthing arrangement and local rules vary, so the pole configuration should be confirmed against the project drawings rather than selected from enclosure space alone.
When a 10kA MCB Is Required
The 10kA Icu value describes the rated ultimate short-circuit breaking capacity, not the normal load current. Use CQB2-125 only when the prospective short-circuit current, Ics requirement and protection coordination are within its published ratings. Where the required duty exceeds these values, select a suitably rated protective device or a verified coordinated solution.
CQB2-125 Type Designation
CQB2-125 C and D Tripping Curves
CQB2-125 Dimensions (mm)
المواصفات الفنية
Use the table below to confirm voltage, rated current, poles, tripping curve, short-circuit duty, service life, protection degree, standard and certification for the CQB2-125 series. Final selection must be checked against the complete circuit design.
| معامل | CQB2-125 |
| Rated voltage (V) | AC230V, AC400V |
| Rated current (A) | 63A, 80A, 100A, 125A |
| عدد الأقطاب | 1P، 2P، 3P، 4P |
| الزوايا المتقطعة | C, D |
| Rated short-circuit breaking capacity Icu (A) | 10000 A |
| Rated service short-circuit breaking capacity Ics (A) | 7500 A |
| Rated impulse withstand voltage Uimp (V) | 4000 V |
| Mechanical life | ≥ 8500 operations |
| حياة كهربائية | ≥ 1500 operations |
| درجة الحماية | IP20 |
| معايير | IEC 60947-2, GB/T 14048.2 |
| شهادة | CCC |
CQB2-125 Tripping Characteristics at 30°C Reference Temperature
| البند | منحنى الاختراق | Test current ln(A) | الوضع الأولي | مدة الحد الزمني للتفعيل أو عدم التفعيل | النتيجة المتوقعة | التعليقات |
| a | C、D | 1.05ln | بارد | 1h(In≤63A) | عدم حدوث الانزلاق | ارتفاع مستمر إلى القيمة المحددة في غضون 5 ثوانٍ |
| b | C、D | 1.3ln | بعد الاختبار في البند (أ) | 2h(ln>63A) | الزحف | |
| c | C、D | 2ln | بارد | 1h(ln≤63A) | الزحف | |
| d | C | 8ln×80% | بارد | 2h(In>63A) | عدم حدوث الانزلاق | أعد تشغيل مصدر الطاقة عن طريق إغلاق مفتاح الوظائف الإضافية |
| D | 12ln×80% | 1s<t<300s | ||||
| e | C | 8In×120% | بارد | t≤0.2s | الزحف | أعد تشغيل مصدر الطاقة عن طريق إغلاق مفتاح الوظائف الإضافية |
| D | 12ln×120% | t<0.2s |
Test note: “Cold” means the test is carried out at the reference calibration temperature without load before the test.
Reference Copper Conductor Cross-Sections
| قطر الجزء العرضي من النحاس (مم²) | التيار المقنن In(A) |
| 16 | ٦٣ أمبير |
| 25 | ٨٠أمپير |
| 35 | 100 أمبير |
| 50 | 125 أمبير |
Conductor note: These cross-sections are CQB2-125 product references. Final conductor sizing must follow the project design, installation method, ambient temperature, grouping, voltage-drop requirements and applicable local rules.
لماذا تختار CHAC
CQB2-125 production is supported by CHAC’s low-voltage manufacturing, assembly and quality-control system. Incoming components, assembly processes, operating checks and final inspection are managed against the approved product specification. The company-scale figures below describe CHAC’s overall manufacturing capability rather than a separate performance claim for this model.
30+
سنوات الخبرة
Low-voltage product engineering and manufacturing experience
1100+
الموظفين
Production, engineering and quality teams support project execution
١٠٠ مليون+
السعة السنوية للأعمدة
Company-wide annual pole capacity across supported product ranges
90%
الإنتاج الآلي
Automated processes support repeatable assembly and inspection
خط التجميع الآلي
مختبر اختبار
حقن وختم
فحص الجودة
Quality records and applicable product documents can be supplied for the confirmed CQB2-125 configuration. Certification and market-approval availability must be verified for the selected model.
ما الذي يمكننا تخصيصه؟
For CQB2-125 projects, CHAC can assess private-label marking, packaging, appearance, existing electrical configurations and technical-document requirements. Requests outside the published product range, including new electrical ratings or market approvals, are subject to engineering evaluation, testing and project feasibility.
الشعار والعلامة التجارية
Private-label marking and nameplate options are available subject to artwork review and sample approval.
تعبئة وتغليف
تخصيص
Color boxes, cartons, labels and manuals can be prepared for the destination market and approved order specification.
كهربائي
تخصيص
Select from the published 63–125A, 1P–4P and C/D options; requests outside this range require technical evaluation.
منتج
مظهر
Housing, handle and appearance options can be reviewed subject to tooling, MOQ and technical feasibility.
شهادة
دعم
تُقدم بيانات الموديل والرسومات ومعلومات الشهادة المعتمدة الخاصة بالتكوين المعتمد المعني.
الهندسة
تطوير
Project support can include drawing review, sample evaluation, testing and production planning, subject to technical approval.
تنزيل
قاطع الدائرة المصغر من سلسلة CQB2
Download the CQB2 series overview for product selection reference. Confirm that each specification and document applies to the CQB2-125 configuration requested for your project.
Need CQB2-125 Technical Documents?
Request the applicable datasheet, drawings, verified certificate information, selection support or OEM/ODM project review.
CQB2-125 Miniature Circuit Breaker FAQ
Q1. What does 10kA mean on the CQB2-125 miniature circuit breaker?
The CQB2-125 has a rated ultimate short-circuit breaking capacity (Icu) of 10,000A and a rated service short-circuit breaking capacity (Ics) of 7,500A. The 10kA marking does not make the breaker suitable for every installation. The prospective short-circuit current at the installation point and the complete protection design must be checked before selection.
Q2. How do I choose between a C curve and D curve MCB?
Choose the curve according to the load’s inrush characteristics and the required protection coordination. C curve is commonly evaluated for general distribution loads with moderate inrush, while D curve may be considered for loads with higher starting current. The correct choice depends on the actual load and system study, not on rated current alone.
Q3. What is the difference between Icu and Ics?
Icu is the rated ultimate short-circuit breaking capacity. Ics is the rated service short-circuit breaking capacity and indicates the short-circuit duty after which the breaker is expected to remain suitable for continued service under the applicable test conditions. For CQB2-125, the listed values are 10kA Icu and 7.5kA Ics.
Q4. Can the CQB2-125 be used as a 125A DC circuit breaker?
No. The specifications on this page describe an AC 230/400V product. AC and DC interruption duties are not interchangeable. Use a breaker that is specifically rated and verified for the intended DC system when DC protection is required.
Q5. What cable size is required for a 125 amp circuit breaker?
The CQB2-125 product reference table pairs 125A with a 50mm² copper conductor; it also lists 16mm² for 63A, 25mm² for 80A and 35mm² for 100A. These are product references, not universal wiring rules. Final conductor sizing must account for installation method, temperature, grouping, voltage drop, conductor material and local electrical requirements.
Q6. When should I choose a 125A MCB instead of a 63A MCB or MCCB?
Consider CQB2-125 when the circuit design requires a 63A to 125A modular AC breaker and its fixed C or D curve, 10kA Icu and other listed characteristics meet the project. For lower-current circuits, a 63A-range MCB may be more appropriate. If adjustable protection, higher fault duty or more advanced coordination is required, evaluate an MCCB. The final decision should be made from the complete system study.
Build the Right CQB2-125 Configuration for Your Project
Send the required current rating, C or D curve, pole configuration, system voltage, destination market and estimated quantity. CHAC will review the specification and provide the applicable technical documents and commercial proposal.
