Overview
The “Bus coupler differential protection” uses the currents measured by the two current transformers that are present in the bay. The trip command of the bus coupler differential protection acts on the circuit breaker that is present in the bay.
For more detailed information on “Bus Coupler Differential Protection” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Setting Parameters
Setting parameters for Bus Coupler Differential Protection
| Addr. | Parameter | C | Setting Options | Default Setting |
| Coupler zone | ||||
| _:1 | Coupler zone:Mode | off on |
on | |
| _:101 | Coupler zone:Thres.1- ph.f.CT overl | 0.1 I/IrObj to 25.0 I/IrObj; ∞ | 4.0 I/IrObj | |
| _:102 | Coupler zone:Thresh.mul-ph.f.CT overl. | 0.1 I/IrObj to 25.0 I/IrObj; ∞ | 4.0 I/IrObj | |
Logic Diagrams & highlights
Fault in the Dead Zone of the Bus Coupler with 2 Current Transformers
Bus Coupler Differential Protection Logic Diagram
Application Example Thres.1-ph.f.CT overl and Thresh.mul-ph.f.CT overl.
Fault in the Coupler Bay
Currents with Fault in the Bus Coupler Bay without Switchover to Current Transformer Overlapping
