All of the relay’s logical nodes are set with Test mode. Test mode is selected through one common parameter via the HMI path . By default, Test mode can only be set locally through LHMI. Test mode is also available via IEC 61850 communication (LD0.LLN0.Mod).
| Test mode | Description | Protection BEH_BLK |
|---|---|---|
| Normal mode | Normal operation | FALSE |
| IED blocked | Protection working as in “Normal mode” but ACT configuration can be used to block physical outputs to process. Control function commands blocked. | TRUE |
| IED test | Protection working as in “Normal mode” but protection functions are working in parallel with test parameters. | FALSE |
| IED test and blocked | Protection working as in “Normal mode” but protection functions are working in parallel with test parameters. ACT configuration can be used to block physical outputs to process. Control function commands blocked. | TRUE |
The mode of all logical nodes located under CTRL logical device are set with Control mode. Control mode is selected via the HMI or PCM600 path . By default, Control mode can only be set locally through LHMI. Control mode inherits its value from Test mode but Control mode ”On”, “Blocked” and “Off” can also be independently set. Control mode is also available via IEC 61850 communication (CTRL.LLN0.Mod).
| Control mode | Description | Control BEH_BLK |
|---|---|---|
| On | Normal operation | FALSE |
| Blocked | Control function commands blocked | TRUE |
| Off | Control functions disabled | FALSE |
According to IEC 61850, the physical outputs to process should be blocked when device is set to blocked or test blocked mode. The usage depends heavily on the actual ACT configuration. In the protection blocking example the main trip from TRPPTRC1 is blocked, and in the control blocking example the CBXCBR1 is blocked. Both comply to the IEC 61850. In real applications some of PTRC’s might also be used for signalling purposes (GOOSE) and blocking and interlocking via IO.