The CDK Series Pump Automatic Control Cabinet is an advanced water supply and drainage automation device developed by SuperShield Machinery Group. Building on years of pump production and control experience, it integrates domestic and international pump control technologies with continuously optimized control circuits. Designed for reliable, efficient pump operation, the CDK series offers multiple starting methods and control modes to suit diverse industrial and municipal applications.
Product Overview
To match high-efficiency and dependable pump performance, the CDK Series Control Cabinet is available in multiple configurations based on power rating and starting method: direct start, star-delta reduced-voltage start, auto-transformer reduced-voltage start, and intelligent soft start. Control modes include liquid level control, pressure control, temperature control, time control, multi-unit linkage, and a submersible pump dedicated type with over-temperature and leakage protection. With comprehensive functionality, reliable quality, and an attractive design, the CDK series serves as an ideal companion for various pump systems across fire protection, water supply, and HVAC applications.
Model Designation System
- CDK: Chaodun Control Cabinet
- 2: Number of Controlled Units
- AC: Main/Standby Pump Switching Mode
- K: Control Mode
- J: Starting Method
- 45: Power Rating (kW)
- D: Dual Power Supply (omitted for single power supply)
Control Modes
- Y – Liquid Level Control: Pump operation is governed by liquid level detected via magnetic float switches in water containers such as tanks or towers, enabling automatic start and stop functions.
- P – Pressure Control: The pump responds to pressure variations in the pipe network or pressure tank detected by an electric contact pressure gauge. When pressure drops below the lower threshold, the pump activates; when it exceeds the upper threshold, the pump stops, maintaining stable pressure within the set range.
- T – Temperature Control: Pump activation and deactivation are based on temperature readings from a pressure-type electric contact thermometer, keeping system temperature within defined parameters.
- K – HVAC Linkage Control: Specifically designed for HVAC pump systems. Manual mode operates via panel buttons; automatic mode is commanded by the linkage center. A no-voltage feedback signal ensures the pump starts before the main unit, safeguarding equipment.
Starting Methods
- Direct Start: Full-voltage starting and running with high starting current and torque.
- Star-Delta Reduced-Voltage Start (J): Motor stator windings connect in Y configuration during startup to reduce per-phase voltage and current, then revert to delta configuration during normal operation.
- Auto-Transformer Reduced-Voltage Start (Z): Voltage and current are stepped down via an auto-transformer during startup, then restored to full voltage during operation.
- Intelligent Soft Start (R): A soft starter provides smooth, contactless voltage ramp-up without impact on the power grid or pipe network.
Operating Environment Requirements
| Power Supply Voltage Fluctuation | ±10% |
| Ambient Temperature | -10°C to +40°C (non-freezing) |
| Relative Humidity | 20%–90% (non-condensing) |
| Altitude | Below 1000m |
| Vibration | Below 5.9m/s² (0.6G), tilt below 5 degrees |
Key Operating Features
- Automatic Pump Adjustment: Equipment automatically adjusts the number of active pumps based on real-time water demand.
- Main/Auxiliary Pump Rotation: Pumps swap roles at each startup cycle, distributing operating hours evenly across the fleet.
- VFD Pump Cycling: During pump addition, the first pump starts on variable frequency drive, switches to line frequency, then the next pump begins on VFD — following a first-start, first-stop sequence.
- Automatic Backup Engagement: If an active pump encounters a fault, the standby unit automatically takes over to maintain continuous operation.
Product Advantages
- International brand VFDs, programmable controllers, and name-brand low-voltage electrical components
- Digital PID adjustment with keyboard operation and digital display for fully automatic, unattended operation
- Clean circuit design enabling straightforward fault analysis and maintenance
- Flexible control modes with strong anti-interference capability and stable, reliable operation
- Stepless speed regulation for water supply adjustment from zero to system maximum
- Soft start under automatic mode minimizes impact on power and pipe networks, extending equipment service life
- Multi-pump alternating rotation prevents backup pump corrosion from prolonged inactivity
- Rich optional features: timed switching, automatic rotation, sleep mode for low/zero flow, remote and local control options
Application Scope
The CDK Series Control Cabinet is suitable for industrial and agricultural production, municipal engineering, high-rise building water supply, drainage, fire protection systems, HVAC hot and chilled water circulation, and general AC motor control applications.
Technical Specifications
| Control Voltage | 380V |
| Motor Power Range | 0.55–315 kW |
| Fire Protection | National Fire CCC Certified (star-delta, soft start, dual power configurations) |