Description
ABB E-31021
The ABB E-31021 is an external DC voltage measurement kit designed for ABB DCS800 industrial DC drive systems. It allows the drive to measure DC motor voltage directly at the motor terminals rather than at the converter terminals. This arrangement is particularly useful in applications involving DC contactors, where accurate motor voltage feedback is required for reliable drive operation.
Product Overview
This measurement kit is designed for DCS800 drive frame sizes D1 to D4. It provides an external voltage measurement solution that helps the drive monitor motor-side DC voltage under different operating conditions.
By supporting voltage feedback directly from the motor, it helps improve measurement accuracy in systems where contactors or other switching devices separate the motor from the drive.
Technical Specifications
| Parameter | Description |
|---|---|
| Manufacturer | ABB |
| Product Type | External DC Voltage Measurement Kit |
| Compatible Drive | ABB DCS800 |
| Supported Frame Sizes | D1–D4 |
| Measurement Type | External DC Voltage |
| Measurement Location | DC Motor Terminals |
| Main Function | Motor Voltage Feedback |
| Application | DC Drive Systems |
| Installation | Drive Control Cabinet |
Key Features
- External Voltage Measurement: Measures DC voltage directly at the motor terminals.
- Improved Feedback: Provides motor-side voltage information for drive control.
- Contactor Compatibility: Supports applications where DC contactors are installed between the drive and motor.
- System Integration: Designed for integration with compatible ABB DC drive configurations.
- Reliable Monitoring: Helps maintain appropriate voltage feedback during different operating conditions.
Structure and Working Principle
The kit incorporates dedicated voltage measurement circuitry and connection interfaces. It is connected between the motor-side measurement points and the drive’s control system.
During operation, the circuit acquires the DC voltage signal from the motor terminals and provides the corresponding feedback to the drive. This allows the controller to monitor motor voltage even when the voltage at the converter terminals differs from the actual motor-side voltage.
Typical Applications
This accessory is suitable for industrial DC drive installations, including:
- Steel rolling mills.
- Industrial conveyor systems.
- Crane and hoisting equipment.
- Wire drawing machinery.
- Industrial winding and unwinding systems.
- Heavy-duty material handling equipment.
Installation and Maintenance
Before installation, confirm the drive frame size, electrical configuration, and measurement requirements. Ensure that the voltage measurement connections are correctly routed and properly insulated.
During maintenance, inspect wiring connections, terminal conditions, and measurement signal stability. Follow ABB installation instructions when connecting or replacing the measurement components.
Operational Advantages
Accurate motor-side voltage measurement is important in DC drive applications involving contactors and dynamic braking functions. This accessory helps provide the necessary voltage feedback for compatible drive configurations.
It is suitable for industrial equipment maintenance, DCS800 system upgrades, and replacement projects requiring external DC voltage measurement.
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