UNITROL UN1000b-Z (3BHE014557R0003) Automatic Voltage Regulator | Replacement, Equivalent & Selection Guide
The UNITROL UN1000b-Z (Part No. 3BHE014557R0003) is an advanced Automatic Voltage Regulator (AVR) manufactured by ABB under the UNITROL series, designed for precise excitation control of synchronous generators in industrial power systems. Konmask.com supplies genuine and compatible units with full traceability.
Technical Specifications
- Model: UN1000b-Z
- Part Number: 3BHE014557R0003
- Series: UNITROL 1000
- Manufacturer: ABB (UNITROL)
- Function: Automatic Voltage Regulator (AVR) / Excitation Controller
- Regulation Mode: AVR / FCR / VAR / PF control
- Input Voltage: AC 85–265 V (wide range)
- Output: Analog & digital I/O for generator excitation control
- Communication: RS-485 / Modbus RTU (model dependent)
- Protection Class: IP20 (panel mount)
- Weight: ~3.5 kg
- Approvals: CE, UL (refer to datasheet for full certifications)
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the UN1000b-Z. Always verify electrical and mechanical compatibility before substitution:
- ABB UNITROL UN1000b (3BHE014557R0001) — Base variant, same series
- ABB UNITROL UN1000b-R (3BHE014557R0002) — Redundant excitation variant
- ABB UNITROL 1020 — Next-generation replacement with enhanced diagnostics
- Basler Electric DECS-200 — Cross-brand equivalent for synchronous generator AVR
- Woodward MFR-3 — Alternative for multi-function generator regulation
- Leroy-Somer D350 — Compatible AVR for medium-voltage generators
Note: Cross-brand substitution requires engineering review of excitation current ratings, I/O mapping, and communication protocols.
Why Choose the Original Model
- Factory-calibrated for ABB generator excitation systems — zero re-tuning required
- Full ABB ecosystem integration: compatible with UNITROL 1000 / 5000 / 6000 series
- Proven reliability in power plants, marine, and industrial generator applications
- OEM firmware and parameter backup support via ABB CMT tool
- Guaranteed interchangeability with existing 3BHE014557R0003 installations
Typical Applications
- Synchronous generator excitation control in power stations
- Industrial standby and prime power generator sets
- Marine main and auxiliary generator regulation
- Hydroelectric and gas turbine generator AVR replacement
- Retrofit and upgrade of legacy UNITROL excitation systems
System Compatibility
- Compatible Generators: ABB AMG, HXR, NXR series; most 3-phase synchronous generators
- Compatible Excitation Systems: UNITROL 1000, UNITROL 5000, UNITROL 6000
- Control Systems: ABB AC500 PLC, Symphony Plus DCS, third-party SCADA via Modbus
- Software Tool: ABB CMT (Commissioning and Maintenance Tool) for parameterization
Selection Guide
Use the following criteria to confirm the correct model for your application:
- Step 1 — Verify Part Number: Confirm 3BHE014557R0003 on the nameplate of the existing unit
- Step 2 — Check Variant Suffix: -Z suffix indicates specific I/O or firmware configuration; do not substitute with -R or base variant without engineering sign-off
- Step 3 — Excitation Current Rating: Match the generator’s field current requirements to the AVR output rating
- Step 4 — Communication Protocol: Confirm RS-485 / Modbus RTU requirements match your SCADA or DCS
- Step 5 — Firmware Version: Request the firmware version from your existing unit for exact replacement; contact Konmask.com for version matching
Quality Assurance & Sourcing
- Units sourced from authorized ABB distributors and certified surplus channels
- Each unit inspected and function-tested prior to shipment
- Original packaging, manuals, and certificates of conformity included where available
- Traceability documentation provided upon request (batch records, test reports)
- 12-month warranty on genuine units; 6-month warranty on tested surplus units
How to Order
- Add to cart or contact support@konmask.com with your quantity and delivery requirements
- Provide your generator model and existing AVR part number for compatibility confirmation
- Request a quotation for volume orders (>3 units) for best pricing
- Expedited shipping available for urgent plant maintenance requirements
- Phone / WhatsApp: +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I replace 3BHE014557R0003 with 3BHE014557R0001 (UN1000b base)?
A: Potentially yes, but the -Z suffix indicates a specific configuration. Parameter re-upload via CMT tool is required. Contact us for guidance.
Q: Is the UN1000b-Z compatible with non-ABB generators?
A: Yes, with proper parameterization. The AVR supports most 3-phase synchronous generators. Engineering review recommended.
Q: Do you supply the ABB CMT commissioning software?
A: We can assist with software sourcing and provide parameter backup files for direct replacements. Contact our technical team.
Q: What is the lead time for this part?
A: In-stock units ship within 2–5 business days. Out-of-stock units: 4–8 weeks depending on ABB supply chain. Contact us for real-time availability.
Q: Can you provide a test report before shipment?
A: Yes. Functional test reports are available upon request for all units.
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Contact: support@konmask.com | +0086 19859288691
