ABB UNS3670 HIEE205011R0001 Retrofit DC Power Supply UNITROL: Compatible Upgrade for Legacy Control Systems
The ABB UNS3670 (HIEE205011R0001) is a DC power supply module engineered for the ABB UNITROL excitation control platform, covering UNITROL 1000, UNITROL 5000, and UNITROL 6000 series installations. As original ABB hardware reaches end-of-life and spare parts become increasingly scarce, this module serves as a verified retrofit-ready replacement that enables engineers to restore, stabilize, and modernize aging excitation control systems without full panel replacement.
Whether you are managing a generator excitation upgrade at a power plant, replacing a failed supply in a running UNITROL 5000 cabinet, or migrating a legacy UNITROL 1000 installation to a more supportable architecture, the UNS3670 HIEE205011R0001 provides the electrical compatibility and mechanical fit required for a controlled, low-risk transition.
Upgrade Compatibility Table
| Parameter | Details |
|---|---|
| Compatible Series | ABB UNITROL 1000 / 5000 / 6000 |
| Module Function | DC Power Supply for excitation control backplane |
| Mounting | DIN rail / backplane slot — confirm rack generation before ordering |
| Terminal Interface | Screw-type terminal block; verify pitch against existing wiring harness |
| Communication Compatibility | Compatible with UNITROL internal bus; no protocol conversion required |
| Replacement Recommendation | Direct replacement for HIEE205011R0001; verify firmware revision on host controller |
| Commissioning Notes | Re-address module after installation; validate excitation setpoints via ABB CMT tool |
| Warranty | 12 months from date of shipment |
Retrofit Planning for Existing Automation Systems
Successful integration of the UNS3670 HIEE205011R0001 into an existing UNITROL installation requires a structured pre-replacement assessment. Engineers should begin by auditing the full excitation cabinet, identifying the current backplane revision and confirming that the UNITROL backplane slot assignment matches the module’s addressing scheme. In multi-module cabinets, the UNS3670 typically operates alongside the ABB UNITROL AVR board, the UNS0880 field current measurement module, and the UNS3680 auxiliary power supply — all of which must remain operational during the swap to avoid excitation loss.
Before disconnecting the failed unit, document all terminal wiring using the existing UNITROL wiring diagram or the ABB UNITROL 5000 hardware manual. Pay particular attention to the DC bus input terminals, the internal logic supply output, and any interlock wiring connected to the UNITROL protection relay interface. Mislabeled or undocumented wiring is the most common cause of extended downtime during power supply replacements in legacy excitation panels.
If the installation includes a UNITROL 1000 AVR module (UNS0776) or an older HIEE300885R0001 interface board, confirm that the replacement UNS3670 is compatible with the installed firmware version on the host AVR. In some UNITROL 5000 configurations, the power supply module communicates status signals to the ABB AC800M controller or a dedicated UNITROL HMI panel — these signal paths must be verified post-installation before returning the excitation system to automatic voltage regulation mode.
For sites running parallel generator sets, coordinate the replacement window with the plant control room to ensure the ABB UNITROL synchronization module and any associated UNITROL PSS (Power System Stabilizer) card remain in service on the standby unit. This prevents a single-point failure from cascading into a full excitation blackout during the maintenance window.
All units are pre-tested prior to shipment. Stock is available for immediate dispatch, and 12-month warranty coverage applies from the date of delivery.
Downtime Control During System Migration
Minimizing downtime during a UNITROL power supply replacement depends on preparation, not speed. The recommended approach is to complete all pre-work — terminal photography, wiring documentation, module addressing verification, and spare fuse staging — before the planned outage window begins. With the UNS3670 HIEE205011R0001 pre-tested and on-site, the physical swap can typically be completed within 30 to 60 minutes for a single-module replacement in a UNITROL 5000 or UNITROL 6000 cabinet.
After installation, restore power to the excitation cabinet in stages: energize the DC supply first, confirm the module’s status LED sequence, then bring the AVR board online before enabling automatic voltage regulation. If the site uses an ABB UNITROL CMT commissioning tool connected via the front RS-232 or USB service port, use it to verify that all excitation parameters — including voltage setpoint, droop setting, and reactive power compensation — match the pre-outage configuration. Do not rely on default parameter values; always restore from a saved parameter backup.
For sites without a recent parameter backup, the commissioning engineer should manually re-enter setpoints from the last known commissioning report before closing the outage. This step protects the original control logic and prevents unintended changes to generator behavior when the unit returns to service.
Retrofit Support FAQ
Q1: Is the UNS3670 HIEE205011R0001 a direct drop-in replacement for the original ABB module?
A: Yes, the UNS3670 HIEE205011R0001 is designed as a form-fit-function replacement for the original ABB part. Mechanical dimensions, terminal layout, and backplane interface are compatible with UNITROL 1000, 5000, and 6000 series cabinets. Always confirm the hardware revision of your backplane before installation.
Q2: What commissioning steps are required after replacing the power supply module?
A: After physical installation, re-address the module if required by your UNITROL configuration, restore excitation parameters from backup using the ABB CMT tool, and verify DC output voltage levels before enabling AVR automatic mode. A functional test under no-load conditions is recommended before returning the generator to service.
Q3: How do I verify terminal wiring compatibility before installation?
A: Cross-reference the UNS3670 terminal diagram against your existing UNITROL wiring documentation. Pay attention to DC input polarity, logic supply output terminals, and any interlock or status signal wiring. If original documentation is unavailable, contact our technical team with your cabinet serial number for wiring guidance.
Q4: What warranty and testing does this module include?
A: Every UNS3670 HIEE205011R0001 unit is functionally tested prior to shipment. A 12-month warranty is provided from the date of delivery, covering manufacturing defects and functional failures under normal operating conditions. Expedited shipping is available for urgent breakdown situations.
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