With increasing power outages and growing demand for uninterruptible supply, DG synchronization is now standard in hospitals, data centres, and large commercial buildings.
DG synchronization allows multiple diesel generator sets to run in parallel, sharing the load efficiently. This N+1 redundancy approach ensures that if one DG fails, others continue to supply power without any interruption. A DG Sync panel manages the automatic synchronisation process.
The core components are: synchronizing controller (DEIF/Woodward/ComAp/Deepsea), automatic voltage regulators, motorized circuit breakers with auto/manual operation, bus coupler with interlocking, and comprehensive protection relays for overcurrent, reverse power, and under/over frequency.
Before connecting generators in parallel, three conditions must be matched — voltage (within ±5%), frequency (within ±0.2 Hz), and phase angle (within ±5°). Modern digital controllers from DEIF, ComAp, and Woodward handle this automatically within milliseconds.
Hospitals require sub-10ms changeover for OT and ICU. Data centres need sub-20ms for Tier III/IV compliance. For these applications, always specify fast-acting auto-transfer schemes and hot-standby DG operation in your panel specification.
Have questions about this topic or want to discuss your project requirements? Our engineers are here to help.
Discuss This Topic →Our engineers are happy to discuss your project requirements in detail.
