Difference between IEC 60909 & IEC 61363 for Short Circuit Analysis
Both IEC 60909 & IEC 61363 are standards for short-circuit current computations, however they meet different purposes:
IEC 60909 - Short-Circuit Currents in Three-Phase AC Systems
- This standard calculates short-circuit currents in 3 phases alternating current power systems, which are generally used in common industrial & utility networks.
- Used for electrical network transmission and distribution.
- Uses symmetrical component methods for determining short-circuit currents.
- Addresses a variety of fault circumstances (such as single-line-to-ground, line-to-line, & three-phase faults).
- Determines the amount & type of protection devices required for fault conditions in typical electrical grids.
IEC 61363 - Electrical installations for ships, mobile & fixed offshore units
- This standard especially addresses short-circuit calculations for maritime boats and offshore units.
- Designed for ships & offshore platforms where special short-circuit behavior must be accounted for.
- Concentrates on unsymmetrical faults, which are widespread in maritime and offshore equipment.
- Considers the compact, distinctive design of electrical systems in constrained locations such as ships, where equipment may have varying operating characteristics.
- Examines the impact of synchronous generators, high impedance connections, and power management technologies commonly utilized in marine environments.
| IEC 60909 | IEC 61363 |
|---|---|
| IEC 60909 specifies basic short-circuit calculations for industrial & utility three-phase alternating current systems. | IEC 61363 specifies specialized short-circuit calculations for maritime and offshore electrical facilities. |