Product Overview
The QYW6 intelligent universal circuit breaker is engineered with a design philosophy of continuous innovation and performance leap. It features optimized overall dimensions, enhanced built-in communication and measurement functions, and supports diverse installation configurations. Boasting an intelligent and user-friendly interface combined with effortless operation, it embodies the cutting-edge quality of modern electrical products.
The circuit breaker is integrated with closing ready electrical indication, electric closing, and remote reset functions. It is also equipped with mechanical indication for the closing ready state of the operating mechanism and an error energy storage safety protection device, further enriching its functional safety features.
Core Performance Advantages
- Full Compatibility & Expansion: Retains all functions of the QKW7 series while introducing additional functions and wiring methods.
- Precision Protection System: The on-board controller features a “dual-adjustment” protection system (adjustable via both knobs and LCD touch keys).
- High-Performance Processing: Adopts a 16-bit DSP high-performance digital signal processor.
- Enhanced Anti-Interference & Accuracy: 12-bit ADC ensures a measurement accuracy of up to 1/2000.
- Ultra-Low Power Consumption: Reduced from 3W to 1.5W.
- Dual Watchdog Technology (WDT): Ensures stable and reliable operation of the control system.
- Integrated Power Supply: Built-in AC power module for simplified wiring.
Upgraded Structural Features
- Advanced Controller: Added drawer communication module and short message notification module for smart operation.
- Expanded Secondary Circuit: Increased terminal ports to meet customized project requirements.
- 2500A~4000A models: 90 ports (vs. 47 ports for QKW7 2000~6300).
- High-Capacity Auxiliary Switches: Contact capacity up to 830VA, configurable with up to 6 NO and 6 NC contacts (with or without a common port).
- Universal Release Design: Undervoltage release, shunt release, and closing electromagnet feature a universal external dimension across the entire series. The undervoltage time-delay release supports adjustable delay time and undervoltage delay time.
Reliable Drawer Mechanism
- Three-position interlocking structure (Connect, Test, Isolate).
- Pointer-type three-position display for intuitive status identification.
- Three-position rotary locking structure for secure operation.
- Middle-position draw-out mechanism for smooth maintenance.
- Safety single-point opening structure to prevent misoperation.
Technical Specifications
| Item | QYW6-2500 | QYW6-4000 |
|---|---|---|
| Rated Insulation Voltage Ui (V) | 1250 | 1250 |
| Rated Impulse Withstand Voltage Uimp (kV) | 12 | 12 |
| Frame Grade Rated Current Inm (A) | 2500 | 4000 |
| Rated Current In (A) | 630, 800, 1000, 1250, 1600, 2000, 2500 | 2000, 2500, 2900, 3200, 3600, 4000 |
| Rated Ultimate Short-Circuit Breaking Capacity Icu (kA) | ||
| 1000/1140V | 60 | 60 |
| 690/800V | 70 | 70 |
| Rated Operational Short-Circuit Breaking Capacity Ics (kA) | ||
| 1000/1140V | 60 | 60 |
| 690/800V | 70 | 70 |
| Rated Short-Time Withstand Current Icw (kA 1s/0.5s) | ||
| 1000/1140V | 60 | 60 |
| 690/800V | 70 | 70 |
| Breaking Time (No Additional Delay) (ms) | 10~20 | 10~20 |
| Closing Time (ms) | <60 | <60 |
| Operational Performance | ||
| Operating Cycles (Service Life) – Mechanical | 7500 | 6500 |
| Operating Cycles (Service Life) – Electrical | 5000 | 2000 |
| Total | 12500 | 8500 |
| Dimensions & Weight | ||
| W × H × D (mm) (Width × Height × Depth) | ||
| 3P Drawer-type | 347 × 450 × 406.5 | 440 × 450 × 406.5 |
| 4P Drawer-type | 442 × 450 × 406.5 | 566 × 450 × 406.5 |
| 3P Fixed-type | 368 × 415.5 × 308 | 461 × 415.5 × 308 |
| 4P Fixed-type | 463 × 415.5 × 308 | 587 × 415.5 × 308 |
| Weight (kg) (Net / Gross) | ||
| 3P Drawer-type | 98/107 | 120/131 |
| 4P Drawer-type | 120/131 | 148/160 |
| 3P Fixed-type | 45/54 | 55/66 |
| 4P Fixed-type | 55/66 | 68/80 |
| Intelligent Controller Type | 3H, 3M, 2H, 2M, M | 3H, 3M, 2H, 2M, M |
Intelligent Controller Technical Specifications
| Feature Item | 3H | 3M | 2H | 2M | M |
|---|---|---|---|---|---|
| Auxiliary Power Supply Voltage | |||||
| 220V AC | ○ | ○ | ○ | ○ | ○ |
| 380V AC | ○ | ○ | ○ | ○ | ○ |
| 90-300V DC | ○ | ○ | ○ | ○ | ○ |
| 50V AC (70V DC) – 480V AC (650V DC) | ○ | ○ | ○ | ○ | ○ |
| AC200-AC450 Universal | ○ | ○ | ○ | ○ | ○ |
| 24V DC | ○ | ○ | ○ | ○ | ○ |
| 48V DC | ○ | ○ | ○ | ○ | ○ |
| Other voltages can be customized | ○ | ○ | ○ | ○ | ○ |
| HMI | |||||
| LED current bar | – | – | – | – | – |
| Digital tube + LED | – | – | ✓ | ✓ | ✓ |
| Segment LCD | – | – | – | – | – |
| Chinese dot-matrix LCD + LED | ✓ | ✓ | – | – | – |
| Button operation | ✓ | ✓ | ✓ | ✓ | ✓ |
| Rotary switch + button | – | – | – | – | – |
| Language: Chinese/English | ✓ | ✓ | – | – | – |
| Communication Functions | |||||
| Modbus-RTU | ✓ | – | ✓ | – | – |
| Profibus-DP | ○ | – | ○ | – | – |
| HPLC (DL/T 645) | ○ | – | – | – | – |
| WiFi | ○ | – | ○ | – | – |
| DeviceNET | ○ | – | ○ | – | – |
| CAN | ○ | – | ○ | – | – |
| Ethernet | ○ | – | ○ | – | – |
| ProfiNET | ○ | – | ○ | – | – |
| IEC61850 | ○ | – | ○ | – | – |
| Bluetooth | ○ | – | ○ | – | – |
| 4G-LTE | ○ | – | ○ | – | – |
| Protection Functions | |||||
| Long-time overcurrent protection (multiple curves selectable) | ✓ | ✓ | ✓ | ✓ | ✓ |
| Short-time delay overcurrent protection (multiple curves selectable) | ✓ | ✓ | ✓ | ✓ | ✓ |
| Instantaneous overcurrent protection | ✓ | ✓ | ✓ | ✓ | ✓ |
| Current unbalance (phase failure) protection | ✓ | ✓ | ✓ | ✓ | – |
| Earth fault protection (differential/current type, one of two) | ✓ | ✓ | ✓ | ✓ | ✓ |
| Residual current protection (IΔn) | ○ | ○ | ○ | ○ | ○ |
| Neutral overcurrent protection (3P+N and 4P only) | ○ | ○ | ○ | ○ | ○ |
| Overload pre-alarm | ✓ | ✓ | – | – | ○ |
| MCR (Making current protection) | ✓ | ✓ | ○ | ○ | ○ |
| HSISC (High-set instantaneous protection) | ✓ | ✓ | ○ | ○ | ○ |
| Overvoltage protection (disabled by default) | ✓ | ✓ | – | – | – |
Product Diagram
Function Comparison Table
| Feature Category | Item | 3H | 3M | 2H | 2M | M |
| Protection | Undervoltage Protection (Default OFF) | ✔ | ✔ | – | – | – |
| Overvoltage Protection (Default OFF) | ✔ | ✔ | – | – | – | |
| Overcurrent Protection (Default OFF) | ✔ | ✔ | – | – | – | |
| Phase Loss Protection | ✔ | ✔ | – | – | – | |
| Phase Sequence Protection (Default OFF) | ✔ | ✔ | – | – | – | |
| Residual Current Protection (Default OFF) | ✔ | ✔ | – | – | – | |
| Load Monitoring | ✔ | ✔ | ✔ | ✔ | ✔ | |
| Regional Monitoring | ○ | ○ | ○ | ○ | – | |
| Overload Alarm | ○ | ○ | – | – | – | |
| Busbar / Cable Temperature Protection | ○ | ○ | ○ | ○ | ○ | |
| Load Shedding Control | – | ✔ | ✔ | ✔ | – | |
| Demand (Energy) Management | ○ | ○ | – | – | ○ | |
| Measurement – Current | Three-phase Current, Phase Current, Unbalance | ✔ | ✔ | ✔ | ✔ | ✔ |
| Neutral Current | ○ | ○ | ○ | ○ | ○ | |
| Measurement – Voltage | Line Voltage, Phase Voltage, Unbalance | ✔ | ○ | ✔ | ○ | – |
| Frequency | ✔ | ✔ | ✔ | ○ | – | |
| Power & Energy | Active Power | ✔ | ✔ | ✔ | ○ | – |
| Reactive Power | ✔ | ✔ | – | – | – | |
| Power Factor | ✔ | ✔ | ✔ | ○ | – | |
| Energy (Active / Reactive / Apparent) | ✔ | ✔ | – | – | – | |
| Power Quality | Harmonics | ✔ | ✔ | – | – | – |
| Waveform Capture | ✔ | ✔ | – | – | – | |
| Demand Measurement | ○ | ○ | – | – | – | |
| System Time | ✔ | ✔ | ○ | ○ | – | |
| Long-term Energy Statistics | ✔ | ✔ | – | – | – | |
| Control & Maintenance | Self-test (Overheat, Memory, A/D Sampling) | ✔ | ✔ | ✔ | ✔ | ✔ |
| Remote Control | ✔ | ✔ | ✔ | ✔ | ✔ | |
| Key Lock | ✔ | ✔ | ✔ | ✔ | ✔ | |
| I/O Fault Alarm Output | ○ | ○ | ○ | ○ | – | |
| Contact Output | ✔ | ✔ | ✔ | ✔ | – | |
| Records & Communication | Trip Records | 10 | 10 | 10 | 10 | 8 |
| Alarm Records | 10 | 10 | – | – | – | |
| Fault Records | 10 | 10 | – | – | – | |
| 4-channel Relay Output | ○ | ○ | ○ | ○ | ○ | |
| Data Interface / Communication Port | ✔ | ✔ | ✔ | ✔ | ✔ |
Legend:
✓= Standard
○ = Optional
– = Not Available
Controller Accessories
DC Power Supply Module (Optional)
When the supply voltage is DC220V or DC110V, an external dedicated power module is required for the intelligent controller.
The module is designed for 35mm standard DIN rail mounting.
Specifications
| Item | Specification |
|---|---|
| Input Voltage | DC220V ±15% or DC110V ±15% |
| Output Voltage | DC24V ±5% |
| Output Current | 1.5A |
Overall Dimensions
Refer to the “Circuit Breaker & Current Transformer Wiring Diagram” section for connection diagrams.
External (N-type) Current Transformer
Description
- External (N-type) current transformer (equipped with 3P+N function).
- For special site requirements, users may install an external CT on each phase conductor (3P+N). Corresponding CT ratio and installation method must be configured accordingly.
- Users should provide installation brackets as required.
- Recommended distance between CT and breaker: ≤ 2 meters.
Installation and Overall Dimensions
Refer to the “Circuit Breaker & Current Transformer Wiring Diagram” section for connection diagrams.
Ground Fault Transformer
Ground Fault Transformer (Zero-Sequence Protection)
When the grounding method is zero-sequence grounding, an external dedicated zero-sequence current transformer can be used to detect grounding current in the cable.
Installation can be carried out upstream or downstream of the breaker.
Recommended distance between transformer and breaker: ≤ 10 meters.
Leakage Current Transformer
Used for leakage protection applications.
When grounding is achieved through leakage current detection, an external dedicated leakage current transformer is required.
Recommended installation distance between transformer and breaker: ≤ 2 meters.
Communication Accessories
Optional accessories include:
- Communication software
- Data concentrator
- Communication module (plug-in or built-in type)
- Data transfer unit
- Maintenance module
- Power supply module
- Dedicated communication cable
(For detailed specifications, please refer to the corresponding accessory documentation.)
Communication Architecture & Network Diagram
Communication Structure Diagram
① Built-in Communication Module
② Micro Switch
(Closing / Opening Coil, Fault Trip, Closing Ready, Energy Storage Status)
③ Closing and Opening Coils
④ Closing, Test, and Disconnected Position Signals
⑤ Plug-in Communication Module
COM Communication Options
For fixed-type circuit breaker communication, the COM module is composed of the internal communication module of the circuit breaker, together with a series of auxiliary contact signals (opening/closing coil, fault trip, closing ready, energy storage status). It also connects to the closing and opening coils with communication functionality.
For draw-out type circuit breaker communication, the COM configuration includes:
- Installation position signals (connected, test, disconnected)
- Opening/closing coils
- Fault trip
- Closing ready
- Energy storage status
It also provides connections for communication-enabled closing and opening coils.
Additionally, an external draw-out communication module is required. This module provides position signals (connected, test, disconnected) through a three-position auxiliary switch mounted on the cradle.
The COM circuit breaker status indicators are independent from the breaker’s local indicator contacts. The breaker’s indication contacts remain effective even if the COM module is not installed.
Built-in Communication Module
This module is integrated into the control unit and installed at the rear of the control unit. It is responsible for transmitting and receiving communication signals from the network.
A flexible cable connects the control unit and the communication module for data transmission.
The module operates with DC24V power supply.
Draw-out Communication Module
This is an external module. When the circuit breaker is in the open position, the module allows address setting for the cradle and stores the assigned address.
The module operates with DC24V power supply.
Communication Coils (Closing & Opening)
The communication-enabled closing and opening coils are connected to the built-in communication module.
The remote trip function (second opening coil or undervoltage release) operates independently of the communication accessories and cannot be connected to the built-in communication module.
