Product Overview

The CDBK Series Variable Frequency Control Cabinet is an intelligent control system designed for automatic pump control, variable frequency speed regulation, pressure monitoring and energy-efficient water supply system management. The cabinet integrates a variable frequency drive (VFD), programmable logic controller (PLC), human-machine interface (HMI), pressure transmitters and protective components into a single enclosure, providing a complete automation solution for water supply and pumping systems.

This control cabinet is widely used in building water supply systems, industrial water circulation and fire protection pump control. Depending on regional terminology, it may also be referred to as a Variable Frequency Pump Control Panel, VFD Control Cabinet, CDBKVariable Frequency Control Cabinet or Variable Frequency Water Supply Control Cabinet.

Key Features

• Variable frequency drive (VFD) for energy-efficient pump speed control based on system demand
• Programmable logic controller (PLC) for automated pump sequencing and system management
• Human-machine interface (HMI) for real-time monitoring, parameter setting and fault diagnosis
• Automatic pressure regulation based on feedback from system pressure transmitters
• Comprehensive motor protection including overload, overcurrent, phase loss and short-circuit protection
• Energy savings of 20-50% compared to traditional direct-on-line pump control systems

Applications

• Building water supply systems with variable frequency pressure control
• Industrial water circulation system pump control
• Fire protection pump control and monitoring
• HVAC chilled water and hot water circulation pump control
• Municipal water supply station pump control
• Irrigation system pump control and scheduling

Customer Benefits

Significant Energy Savings

The variable frequency drive adjusts pump speed based on actual system demand, reducing energy consumption by 20-50% compared to traditional direct-on-line pump control systems, providing rapid return on investment.

Automatic Pressure Regulation

The control cabinet continuously monitors system pressure via pressure transmitters and automatically adjusts pump speed to maintain the required system pressure, eliminating pressure fluctuations and ensuring consistent water supply.

Extended Pump Service Life

The soft-start capability of the variable frequency drive eliminates the mechanical stress associated with direct-on-line starting, reducing pump and motor wear and extending equipment service life.

Intelligent System Management

The PLC-based control logic provides automatic pump sequencing, alternation and standby management, ensuring balanced equipment utilisation and system reliability even during pump maintenance or failure.

Real-Time Monitoring and Diagnostics

The HMI provides real-time display of system parameters, fault alarms and operational status, enabling operators to monitor system performance and respond quickly to abnormal conditions.

Comprehensive Motor Protection

Integrated overload, overcurrent, phase loss, short-circuit and earth fault protection ensure safe motor operation and prevent damage from electrical faults.

Technical Specifications

Parameter	Specification
Product Series	CDBK Series
Control Type	Variable frequency pump control cabinet
Motor Power Range	Customised per project requirements
Control Mode	Automatic / Manual / Remote
Pressure Control Range	Customisable via HMI
Protection Functions	Overload, overcurrent, phase loss, short-circuit, earth fault
Display	HMI touch screen
Enclosure Rating	IP54 (standard)

Selection Guidance

To select the appropriate CDBK Series control cabinet, please provide the following information:

• Number of pumps to control
• Motor power rating for each pump (kW)
• Required system pressure range (MPa or bar)
• Control mode requirements (automatic, manual, remote)
• Available voltage and frequency
• Installation environment (indoor, outdoor, pump room)
• Communication protocol requirements (Modbus, BACnet, etc.)

Final model selection should be confirmed according to the actual system requirements and project conditions.

Installation and Maintenance

Installation Guidance

The control cabinet should be installed in a clean, dry, well-ventilated environment with adequate clearance for heat dissipation and maintenance access. The cabinet must be securely mounted on a level surface or wall. All power and control cable connections must be made by qualified electrical personnel in accordance with local electrical codes.

Pre-Start Inspection

Before commissioning, confirm the following:

• All power and control cable connections are secure and correctly wired
• Earth connection is properly established
• Cabinet enclosure is properly sealed and door is closed
• Ventilation fans and filters are unobstructed
• Pressure transmitter connections are correct
• HMI settings are configured for the required system parameters

Routine Maintenance

Regular inspection should include:

• Checking terminal connections for signs of loosening or overheating
• Inspecting ventilation fans and cleaning filters
• Verifying HMI parameter settings and fault history
• Testing protective functions at regular intervals
• Cleaning cabinet interior and exterior surfaces

Available Configurations

• Single pump to multi-pump configurations
• Motor power ratings customised per project requirements
• Automatic / Manual / Remote control modes
• HMI touch screen with real-time monitoring and diagnostics
• Communication interface options (Modbus, BACnet, Profibus)
• IP54 enclosure rating (customisable)

FAQs

What is a CDBK Series variable frequency control cabinet?

It is an intelligent control system integrating a variable frequency drive, PLC, HMI and protective components for automatic pump control, variable frequency speed regulation and energy-efficient water supply system management.

How much energy can be saved?

Typical energy savings of 20-50% compared to traditional direct-on-line pump control systems, depending on the system load profile and operating hours.

What protection functions are included?

Overload, overcurrent, phase loss, short-circuit and earth fault protection are standard, with additional options for dry-running, over-pressure and under-pressure protection.

Can the cabinet control multiple pumps?

Yes. The CDBK Series supports single pump to multi-pump configurations with automatic pump sequencing, alternation and standby management.

Why use variable frequency control?

Variable frequency control adjusts pump speed based on actual system demand, reducing energy consumption, eliminating pressure fluctuations and extending pump and motor service life.

Where can the CDBK Series be used?

It is widely used in building water supply systems, industrial water circulation, fire protection pump control, HVAC circulation systems and municipal water supply stations.

Contact Chaodun

For product selection, technical data, performance information or project quotations, please contact Shanghai Chaodun Machinery Manufacturing Group Co., Ltd.

Website: https://cd-pump.cc

Email: Suzion@cd-pump.com

WhatsApp: +44 751 8050 473