Description
Product Introduction & Engineering Value
Running a DC motor above base speed is impossible without proper field weakening control. When the field weakening circuit becomes unstable, operators typically notice erratic overspeed behavior, poor speed regulation, or nuisance drive trips long before the armature converter itself develops problems.
The ABB GLB0201 is a Field Weakening Unit Board developed for ABB VERITRON® DC drive systems. It regulates the motor field during extended-speed operation, enabling constant-power performance while protecting the drive from unsafe operating conditions. Although the product has reached ABB’s obsolete lifecycle phase, it remains an important spare part for facilities maintaining legacy VERITRON installations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB (ASEA Brown Boveri) |
| Model | GLB0201 |
| Product Type | Field Weakening Unit Board |
| Drive Family | ABB VERITRON® DC Drives |
| Primary Function | Field weakening control |
| Installation | Internal PCB assembly |
| Application | DC motor speed regulation above base speed |
| Hardware Type | Printed Circuit Board (PCB) |
| Lifecycle Status | Obsolete (ABB lifecycle) |
| Spare Parts Availability | Limited to remaining inventory |
| Repair Availability | Subject to component availability |
| Recommended for | Existing VERITRON system maintenance only |
Engineering Note: ABB officially classified the GLB0201 as Obsolete beginning in 2010. ABB states that spare parts and repair services are limited to available inventory and component availability, with no direct replacement product identified.
Field Application & The “Trench” Experience
A paper mill operating an older DC sectional drive reported that the rewinder motor could no longer achieve production speed above its base RPM. Maintenance personnel initially suspected worn brushes and armature problems because the drive operated normally at lower speeds.
Further testing showed that the armature converter remained healthy while the field current failed to decrease correctly during acceleration. Replacing the GLB0201 field weakening board restored proper field regulation, allowing the motor to enter the constant-power operating region without overspeed alarms or unstable speed feedback.
Typical applications include:
- Steel rolling mill DC main drives
- Paper machine rewind and unwind sections
- Wire drawing line DC motors
- Heavy-duty crane hoist DC drive systems
- GLB0201
- GLB0201
Transparency SOP: QA & Testing
Before shipment, every undergoes a documented inspection process.
- Verify the ABB model identification and PCB revision.
- Inspect the board for damaged traces, overheated components, and solder defects.
- Examine all edge connectors for oxidation and mechanical wear.
- Perform continuity and insulation checks on critical circuits.
- Conduct controlled power-up verification when compatible VERITRON test equipment is available.
- Package the board using anti-static materials with impact-resistant industrial packaging.
The Veteran’s Tech Trap Guide
⚠️ Don’t confuse field weakening faults with armature converter failures.
Loss of top-end motor speed is frequently caused by the field control circuit instead of the SCR power bridge.
⚠️ Verify the motor field winding first.
Open field windings, deteriorated excitation wiring, or failed field contactors can produce symptoms nearly identical to a defective .
PRO TIP:
Before ordering a replacement board, record the drive’s field current at both base speed and maximum operating speed. If field current does not decrease as commanded, investigate the complete excitation circuit before replacing the PCB.
⚠️ Plan for long-term support.
ABB has officially placed the in the Obsolete lifecycle phase. Spare parts are limited to remaining inventory, and ABB does not list a direct replacement product. Plants relying on VERITRON drives should consider developing a long-term modernization strategy.
Dynamic FAQ
Q1. What is the ABB used for?
The is a field weakening unit board used in ABB VERITRON DC drives. It controls the motor field during operation above base speed, enabling constant-power performance while maintaining stable drive operation.
Q2. Is the still manufactured by ABB?
No. ABB has designated the as Obsolete. New production has ended, and spare parts and repair services are available only while inventory and components remain available.
Q3. Does ABB offer a direct replacement?
According to ABB’s published lifecycle statement, no direct replacement product is available for the . Modernization typically requires evaluation of the complete drive system rather than a simple board substitution.
Q4. Are New Surplus boards genuine ABB products?
Yes. New Surplus inventory consists of unused original ABB hardware preserved under controlled warehouse conditions. Each board is inspected for identification, connector condition, and physical integrity before shipment.
Q5. Can a refurbished be used in an existing VERITRON drive?
Yes. When professionally tested and verified, refurbished boards are commonly used to extend the operating life of legacy VERITRON DC drive installations. Functional testing with compatible hardware is recommended before commissioning.
Q6. Is warranty available?
Yes. Both New Surplus and professionally refurbished boards are available with warranty coverage. Warranty duration depends on the product condition and is confirmed with the sales quotation.
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