Introduction du produit
I. Multi-channel Fan Comprehensive Protection Control Box
Equipped with protection against overload, phase loss, short circuit, etc., it contains an integrated motor protection switch, which can accurately detect the current and voltage during motor operation. The control box is equipped with local manual control buttons and remote automatic control terminal interfaces, featuring convenient operation and stable and reliable operation.
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The built-in motor protection switch integrates the functions of discrete components such as circuit breakers, contactors, thermal relays, and isolators, enabling the **integrated control, protection, and monitoring** of motors and power distribution systems. Its core value lies in solving the problems of mismatched protection characteristics and low reliability in traditional discrete schemes, and it is particularly suitable for harsh scenarios with high short-circuit currents and limited space.
Key Features
Integrated design: A single device replaces the "circuit breaker + contactor + thermal relay" combination, reducing wiring nodes by 70% and lowering the failure rate.
Wide application range:
Voltage: AC 690V (50/60Hz)
Current: 0.25A - 125A (adjustable range 0.12A - 125A)
Breaking capacity: 35kA for economy type, 50kA for standard type, and **80kA for high breaking type** (leading the industry).
Protection class: IP30 as standard, optional IP65 enclosure (suitable for humid and dusty environments).
II. Core Protection Functions
Provide **three-stage full selective protection**, with parameters that can be digitally set through the panel:
1. Current protection
| **Protection Type** | **Setting Range** | **Action Time** | **Application Scenario** |
|---------------------------|---------------------------------|-----------------|--------------------------------|
| Instantaneous short-circuit protection | 16In±15% | ≤0.1ms | Suppress short-circuit current impact |
| Short-time delay protection | Motor: 6 - 12Ir1±15% | Fixed time 0.2s | Avoid starting peak current |
| | Power distribution: 3 - 6Ir1±10% | | |
| Overload inverse time protection | 0.4 - 1Ie | At 1.5Ir1: 128s for motor / 64s for power distribution | Prevent motor overheating damage |
2. Non-electrical quantity protection
Voltage fault: Overvoltage (≥470V±10%), undervoltage (≤270V±10%), action time 5s.
Phase fault: Phase loss / three-phase imbalance (difference between any two phases > 50%), action time 2s.
Leakage protection (optional)**: Residual current 30mA - 500mA adjustable, action time ≤0.1s.
Intelligent diagnosis: The panel LED indicates fault types in real-time (overload, short circuit, phase loss, etc.) and supports fault history query.
III. Control and Operation Characteristics
1. Flexible control modes
Remote automatic control: Supports PLC/SCADA signal input (DC 24V or AC 220V).
Local operation: Knob for manual switching on/off (including "AUTO/OFF/TRIP/RESET" gears).
Mechanical interlock: Ensures no conflict between remote and local operations.
2. Excellent electrical life
Mechanical life: 5 - 10 million times
Electrical life: 1 - 1.2 million times under AC-43 working conditions (suitable for heavy-load starting).
> Adopts contact-electromagnetic system separation design to suppress secondary bounce and extend contact life.
IV. Overview of Technical Parameters
| **Parameter Item** | **Index** | **Remarks** |
|--------------------------|-------------------------|--------------------------------------|
| Rated insulation voltage | 800V | Complies with IEC 60439 |
| Arcing distance | ≤30mm | Reduces cabinet space occupation |
| Current limiting coefficient | ≤0.2 | Limits short-circuit thermal impact to 1/5 of traditional schemes |
| Installation method | Supports vertical/horizontal/transverse installation | Adapts to MCC drawer cabinets (1/4 or 1/2 unit) |
| Environmental adaptability | Temperature -25℃ - +40℃; altitude ≤2000m (plateau type can be customized for 4000m) | |
V. Extended Functions and Selection
1. Modular accessory system
| **Accessory Type** | **Function** | **Application Case** |
|--------------------------|-----------------------------------------|------------------------------------|
| Fire protection module (KB0-F) | Forced start (bypass protection in case of fire) | Fire pump control |
| Star-delta starter (KB0J) | Integrates Y-Δ conversion logic | Step-down starting of high-power motors |
| Communication module (KB0-T) | Supports Modbus-RTU/Profibus DP | Access to industrial IoT systems |
| Dual power switch (KB0S) | Automatically switches to standby power | Uninterrupted power supply for critical loads |
2. Selection guide
Motor protection: Select the controller according to the rated current I<sub>N</sub> of the motor (example: 22kW motor with I<sub>N</sub>≈42A → choose KB0-63C/R45□).
Short-circuit capacity matching:
Expected short-circuit current ≤35kA → economy type (C)
35kA - 50kA → standard type (Y)
＞50kA → **high breaking type (H)**.
VI. Typical Application Scenarios
Heavy industry: Crushers, compressors (withstand frequent starting impacts).
Building facilities:
Fire-fighting fans (KB0-F ensures forced operation in case of fire)
Basement water pumps (IP65 moisture-proof type).
Energy infrastructure:
Power distribution circuits of photovoltaic inverters (adaptable to 690V systems)
Port cranes (vibration-resistant design).
Installation tips: The cross-sectional area of the control circuit wire ≥0.75mm²; the tripping state must be reset (turn to "RESET") before switching to "AUTO".
VII. Competitive Advantages Compared with Traditional Schemes
| **Comparison Item** | **KB0 Scheme** | **Discrete Component Scheme** |
|--------------------------|-----------------------------------------|-------------------------------------|
| Cabinet occupation | Reduced by 60% | Requires more space for multiple devices |
| Recovery time after short circuit | ≤5 minutes (maintenance-free continuous operation) | ≥2 hours (fuse replacement + maintenance) |
| Protection coordination | Internal self-matching (seamless connection of three-stage curves) | Difficult to match characteristics of multiple devices |
| Whole life cycle cost | Reduced by 40% (fewer maintenance times, low energy consumption) | High cost of spare parts and replacement |