Blocking Of The Function Block; Setting Guidelines; Setting Example - Hitachi Relion 670 Series Applications Manual
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Also See for Relion 670 Series:
- Applications manual (438 pages) ,
- Commissioning manual (284 pages) ,
- Product manual (192 pages)
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Section 15
Logic
15.1.3.6
Blocking of the function block
Total block of the trip function is done by activating the input BLOCK and can be used to disable the
outputs of the trip logic in the event of internal failures. Block of lockout output is achieved by activating
the input BLKLKOUT.
15.1.4
Setting guidelines
The parameters for the trip function SMPPTRC (94) are set via the local HMI or PCM600.
Operation: Sets the mode of operation. Disabled switches the tripping off. The normal selection is
Enabled.
Program: Sets the required tripping scheme. Normally 3 phase or 1p/3p is used.
TripLockout: Sets the scheme for lockout. Disabled only activates the circuit breaker close lockout output.
Enabled activates the circuit breaker close lockout output and latches the TRIP related outputs. The
normal selection is Disabled.
AutoLock: Sets the scheme for lockout. Disabled only activates lockout through the output CLLKOUT.
Enabled additionally allows lockout activation via the trip inputs. The normal selection is Disabled.
tTripMin: Sets the required minimum duration of the trip pulse. It should be set to ensure that the circuit
breaker is opened correctly. The normal setting is 0.150s.
tWaitForPHS: Sets a duration after any of the inputs 1PTRZ or 1PTRGF has been activated during which
external pole selection must operate in order to get a single pole trip. If no pole selection has been
achieved, a three-pole trip will be issued after this time has elapsed.
tEvolvingFault: Secures two- or three-pole tripping depending on Program selection during evolving
faults.
15.1.4.1
Setting example
Consider a line-to-earth fault in phase L2 of a 400 kV, 2000 MVA, 50 Hz system.
Table 25:
Name
Rated MVA capacity (SBase)
Rated voltage (UBase)
Rated Current (IBase)
System Frequency
VT ratio
CT ratio
212
If the group connections of current and voltage are not connected to SMAI or the signal
quality is bad, the SMPPTRC function will set all the reported current magnitudes to -2.000A,
voltage magnitudes to -0.002kV, current and voltage angles to -2.000deg values respectively,
indicating Invalid data.
System details
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Value
2000 MVA
400 kV
3000 A
50 Hz
400 kV/110 V
3000/1 A
Phasor measurement unit RES670
1MRK511407-UUS Rev. N
M14828-21 v5
M12274-3 v11
GUID-35DDD77E-9CEB-4975-BFD7-6017A34E57B8 v1
Application manual
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