The following table summarize the differences between Stub Protection & Teed Protection
| Parameters | Stub Protection | Teed Protection |
|---|---|---|
| System Configuration | Applied in a 3-terminal system in which one terminal is momentarily unavailable or disconnected. | Applied in a 3-terminal system with all terminals constantly active and coupled. |
| Protection Scope | When one of the active terminals fails, the focus is on protecting the remaining two. | Concurrently protects all three interconnected terminals. |
| Application | Typically used for maintenance, testing, or terminal isolation. | Used in systems with three terminals that are continually connected to form a T or Y arrangement. |
| Complexity | Generally simple due to the transitory nature & fewer active terminals. | More complicated due to the requirement to protect all active terminals & their interconnections. |
| Use Case | Temporary protection under certain conditions (such as maintenance). | Permanent protection for a system with 3 active & interconnected terminals. |
| Fault Detection | Detects faults between two active terminals. | Detects problems in all three terminals & their interconnections. |
| Relay Settings | When the system resumes normal operation, tweaks or changes are required. | Settings are intended to support the ongoing operation of all terminals. |
| Relay Coordination | Fewer terminals are active, which simplifies coordination. | It takes more complex coordination to enable reliable fault detection among 3 terminals. |
| Example | A two-ended connection that is temporarily protected as a stub if the third termination is disconnected. | A three-terminal line with all terminals operational and protection required throughout the system. |
This table clearly compares Stub with Teed Protection in a wide range of aspects.
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