ABB SYNCHROTACT5 3BHB006713R0217 – Automatic Synchronizer and Synchrocheck for Safe Generator-to-Grid Closing
The ABB SYNCHROTACT5 3BHB006713R0217 is designed to handle automatic synchronization and synchrocheck for generators, tie-breakers, and bus couplers. It helps close breakers at the right moment—matching voltage, frequency, and phase angle—so parallel operation happens safely and quickly. From my experience, it’s a solid fit for retrofit switchgear projects and new builds where dependable, standards-based synchronizing is a must.

Key Features
- Automatic synchronizing – Matches voltage, frequency, and phase angle, then issues the close command with breaker time compensation.
- Synchrocheck supervision – Independent permissive check to prevent out-of-sync closing in abnormal conditions.
- Dead-bus and live-bus logic – Detects bus status and selects the appropriate strategy; typically reduces operator intervention.
- Configurable limits – Set slip, angle, voltage, and frequency windows to meet plant standards and grid codes.
- Binary I/O for interlocks – Integrates cleanly with existing switchgear signals (ready, breaker status, permissives, alarms).
- Event logs and test functions – You might notice that commissioning goes smoother with clear indication and repeatable test routines.
- Rugged 24 VDC control supply – In many cases this aligns with common substation and plant control power schemes.

Technical Specifications
| Brand / Model | ABB SYNCHROTACT5 3BHB006713R0217 |
| Function | Automatic synchronizer with synchrocheck for generator, tie-breaker, and bus coupler applications |
| Power Requirements | 24 VDC nominal (typically 18–36 VDC) |
| Sensing Inputs | Generator and bus VT inputs, nominal 100–120 VAC, 50/60 Hz (range depends on variant) |
| Binary I/O | Digital inputs for status/permissives; relay outputs for close/alarms (potential-free) |
| Operating Temperature | Typically -10 °C to +55 °C (installation-dependent) |
| Installation Method | Control cabinet mounting; front-access wiring; integrates with standard switchgear interlocks |
| Compliance | CE; RoHS; designed to meet common utility/protection practices (IEC 60255 class devices, model-dependent) |
Application Fields
This model is typically used in power generation and industrial power systems where fast, repeatable synchronizing is essential:
- Power plants: hydro, thermal, gas, and combined-cycle units synchronizing to the grid.
- Industrial cogeneration and CHP plants synchronizing multiple generator sets.
- Data centers and hospitals with paralleling switchgear for reliability and load sharing.
- Process plants with bus-coupler or tie-breaker synchronization between sections.
- Marine and offshore systems where precise genset paralleling is expected.
Advantages & Value
- Reliability – Proven SYNCHROTACT platform; in many cases, it reduces mis-closing risk and mechanical stress on breakers.
- Compatibility – Works with standard VT/PT sensing and dry-contact interlocks; easy to fit into mixed-vendor switchgear.
- Commissioning efficiency – One thing I appreciate is the clear indication and test modes that speed up FAT/SAT.
- Total cost – Fewer nuisance trips and shorter synchronization time typically translate into lower O&M costs.
- Support & spares – Documentation and parameter sets are straightforward; spare modules are easy to keep on hand.

Customer note: “We used the SYNCHROTACT5 on a CHP upgrade. Once we set the angle and slip limits to match our breaker closing time, parallel close was consistent on every run.” – Maintenance Supervisor, CHP facility
Installation & Maintenance
- Cabinet & environment – Mount in a clean, dry, ventilated control cabinet. Keep ambient within the stated operating range and allow space for wiring access.
- Power & grounding – Use a stable 24 VDC control supply with proper fusing. Bond protective earth and maintain clean signal reference for VT wiring.
- Signal wiring – Route VT leads separately from high-current cables; shield and twist where practical. Verify correct VT ratios and polarity.
- Interlocks – Map digital inputs/outputs to your breaker permissives, ready signals, and alarms. Test close inhibition and out-of-sync blocking.
- Commissioning – Set voltage, frequency, slip, and angle limits; measure breaker closing time and apply compensation. Use the built-in test to simulate sync windows.
- Routine maintenance – Periodically check terminals, clean dust, verify time stamps/logs, and re-validate parameters after protection setting changes. Firmware updates may apply depending on the variant.
Quality & Certifications
- CE-marked; RoHS-compliant components in most configurations.
- Designed in line with utility/protection standards (IEC 60255 class devices, series-dependent).
- UL/CSA availability may depend on the exact ordering code; confirm at RFQ stage.
- Manufacturer warranty as per ABB policy (typically 12 months); extended service options available.
Tip: If you’re replacing an older synchronizer, share your VT ratings, breaker type/close time, and desired sync windows. It seems to be the fastest way to pre-parameterize the SYNCHROTACT5 3BHB006713R0217 so your SAT is a single pass.












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