The Blocking mode setting has three blocking methods. In the "Freeze timers" mode,
the operation timer is frozen to the prevailing value, but the OPERATE output is not
deactivated when blocking is activated. In the "Block all" mode, the whole function is
blocked and the timers are reset. In the "Block OPERATE output" mode, the function
operates normally but the OPERATE output is not activated.
4.2.5.5 Application
During an earth fault, HAEFPTOC calculates the maximum current for the current
feeder. The value is sent over an analog GOOSE to other protection relays of the
busbar in the substation. At the configuration level, all the values received over the
analog GOOSE are compared through the MAX function to find the maximum value.
The maximum value is sent back to HAEFPTOC as the I_REF_RES input. The
operation of HAEFPTOC is allowed in case I_REF_RES is lower than the locally
measured harmonics current. If I_REF_RES exceeds the locally measured
harmonics current, the operation of HAEFPTOC is blocked.
Analogue
GOOSE
receive
Analogue
GOOSE
receive
Analogue
GOOSE
receive
MAX
Analogue
GOOSE
send
HAEFPTOC
I_REF_RES
BLOCK
START
OPERATE
Io
I_HARM_RES
BLKD_I_REF
GUID-4F4792F0-B311-4EB2-8EC8-56F062592158 V1 EN
Figure 186: Protection scheme based on the analog GOOSE communication
with three analog GOOSE receivers
1MRS758755 A Section 4
Protection functions
REC615 and RER615 357
Technical Manual
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