CQAU2 Series Over-Under Voltage Guard Switch
The CQAU2 over under voltage relay is specified for over/under-voltage guard switch. Published data includes 230V AC 50Hz; Ui 415V and normal 175–255V; overvoltage trip ≥265±10V; undervoltage trip ≤165±10V. Confirm the accessory interface, control circuit, wiring and destination-market requirements before ordering.
Product Overview
CQAU2 is a over under voltage relay for low-voltage panel and breaker accessory systems. The summary below uses the published model record; it does not replace the complete drawing, wiring instructions or project design review.
Over/under-voltage guard switch. normal 175–255V; overvoltage trip ≥265±10V; undervoltage trip ≤165±10V is the published electrical reference. Compatibility, contact logic and installation details must be confirmed for the exact ordered version.
Key Features
Typical Applications
Use it where the supply voltage must be monitored against the model's published operating and trip window. Confirm the system voltage, fault/coordination study and whether the project needs over/under-voltage release or another protection function.
Applications and Selection Guide
Use the product-specific values below as a shortlist, then validate the complete circuit and mechanical interface. An accessory rating alone does not establish compatibility with every breaker, panel or control system.
| Selection point | CQAU2 reference | What the project must confirm |
|---|---|---|
| Primary function | over/under-voltage guard switch | Confirm the required signal or protection function before ordering |
| Electrical reference | 230V AC 50Hz; Ui 415V | Match the project control or supply circuit |
| Rating / operating window | normal 175–255V; overvoltage trip ≥265±10V; undervoltage trip ≤165±10V | Use the published range; do not infer missing ratings |
| Interface | for compatible CQB2 breaker accessory interface | Verify the compatible breaker, panel, base or rail interface |
| Wiring | not stated on the product record | Final conductor and protection selection follows the project design and local rules |
| Documents | IEC 60947-5-1 | Request the exact drawing and applicable compliance documents for the ordered version |
Function and signal path
Over/under-voltage guard switch. Confirm whether the circuit needs status feedback, fault alarm, remote trip or voltage release.
Control-circuit fit
230V AC 50Hz; Ui 415V. Match the control voltage and operating window to the project circuit; never assume a nearby rating is interchangeable.
Mechanical interface
for compatible CQB2 breaker accessory interface. Confirm breaker family, rail/base or panel interface, clearances and maintenance access.
Wiring and documentation
not stated on the product record. Request the exact drawing and installation document for the ordered configuration.
Ordering Guide
- Specify the exact model and accessory function: CQAU2, over/under-voltage guard switch.
- State the control/supply voltage and any required operating window.
- Confirm the compatible breaker family, panel, base or DIN-rail interface.
- Provide quantity, destination market, wiring details and required technical documents.
- Ask CHAC to verify any non-standard marking, packaging or configuration request before production.
Installation and Coordination Checks
- Use the exact product drawing and installation instructions for the ordered configuration.
- Verify voltage, conductor, terminal, enclosure, clearances and maintenance access.
- Check the accessory’s signal or trip logic against the control circuit and upstream/downstream protection.
- Installation, testing and maintenance must be carried out by qualified personnel under applicable rules.
Type designation
Dimensions(mm)
Technical Specifications
| Parameter | ||
| AC-15 | Rated Operational Voltage (V) | AC 230V 50Hz |
| Rated Insulation Voltage (V) | 415V | |
| Operating Characteristics | Maintains long-term circuit breaker operation at voltages between 175V – 255V | |
| Trips at voltages ≥ 265±10V (Over-Voltage) | ||
| Trips at voltages ≤ 165±10V (Under-Voltage) | ||
| Mechanical Life | Not less than 4,000 operations. | |
| Standards | GB/T 14048.5, IEC 60947-5-1 | |
Conductor requirements and cross section
| Copper cross-section(mm2) |
| 1X2.5 |
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 CQAU2 projects, CHAC can review private-label marking, packaging, approved electrical options, accessory interface and technical-document requirements. Requests outside the published range are subject to engineering evaluation, testing, MOQ and project feasibility.
Logo & Branding
Private-label marking and nameplate options are subject to artwork review and sample approval.
Packaging
Customization
Cartons, labels and manuals can be prepared for the approved order specification and destination market.
Electrical
Customization
Published 230V AC 50Hz; Ui 415V, normal 175–255V; overvoltage trip ≥265±10V; undervoltage trip ≤165±10V and interface options are reviewed against the ordered CQAU2 configuration; non-standard requests require technical evaluation.
Product
Appearance
Appearance options can be reviewed subject to tooling, MOQ, marking requirements and technical feasibility.
Certification
Support
Datasheets, drawings and verified document information are supplied for the applicable approved configuration.
Engineering
Development
Project support may include drawing review, sample evaluation, testing and production planning, subject to technical approval.
Download
CQAU2 Technical Documents
Request the current datasheet, drawings, wiring information and applicable documents for the ordered accessory configuration.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
CQAU2 Product FAQ
How does the CQAU2 work?
The CQAU2 monitors the supply against its published window: normal 175–255V; overvoltage trip ≥265±10V; undervoltage trip ≤165±10V. When the relevant limit is reached, the compatible breaker accessory function responds as specified by the product design.
What is an over/under-voltage protection device?
It monitors supply voltage and operates when voltage moves outside defined limits. The correct thresholds and reset behavior must be taken from the selected model's documentation.
What voltage range is published for the CQAU2?
The published reference is 230V AC 50Hz; Ui 415V and normal 175–255V; overvoltage trip ≥265±10V; undervoltage trip ≤165±10V. Confirm the system voltage, tolerance and installation conditions before ordering.
Is the CQAU2 the same as a shunt trip release?
No. A voltage release responds to its monitored voltage window, while a shunt trip is controlled by a separate energizing signal. Select the function that matches the protection or control logic.
Which breaker is compatible with the CQAU2?
The CQAU2 is an accessory for a compatible breaker interface. Confirm the exact breaker family, mounting position and coordination requirements.
What should be checked during installation of the CQAU2?
Check voltage, thresholds, wiring, breaker interface, enclosure conditions and the manufacturer's installation instructions. Testing must be performed by qualified personnel.
Confirm the Right CQAU2 Configuration
Share the required function, voltage, interface, quantity, destination market and technical documents. CHAC will review the request against the published accessory data.
