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9.3.2.3
Four step phase overcurrent protection OC4PTOC
Main menu/Settings/Setting Group N/Current protection/
PhaseOverCurrent4Step(PTOC,51_67)/OC4PTOC:x
Displays some instances of OC4PTOC each with several settings. The settings
range from base current and voltage settings to parameters for customer
programmable curves.
9.3.2.4
Four step residual overcurrent protection EF4PTOC
Main menu/Settings/Setting Group N/Current protection/
ResidualOverCurrent4Step(PTOC,51N_67N)/EF4PTOC:x
Displays some instances of EF4PTOC with a large number of settings per instance.
Typical settings are those for harmonic restraint, minimum fundamental frequency
current level, base settings for current and voltage and several others.
9.3.2.5
Sensitive directional residual over current and power protection
SDEPSDE
Main menu/Settings/Setting group N/Current protection/
SensDirResOvCurr(PSDE,67N)/SDEPSDE:x
Includes voltage, current, operation mode and timer settings.
9.3.3
Voltage protection
9.3.3.1
Overview
For Voltage protection there are settings for Under-voltage, Over-voltage, Residual
over-voltage and Overexcitation protection. There are three instances of parameters
in each category except in the case of Overexcitation which has two instances.
Each instance consists of a number of parameters that make it possible to switch
the function On or Off, set rated quantities or make other adjustments necessary for
the fine tuning of the function itself.
9.3.3.2
Two step overvoltage protection OV2PTOV
Main menu/Settings/Setting Group N/Voltage protection/
OverVoltage2Step(PTOV,59)/OV2PTOV:x
Displays several settable parameters including settings for IDMT curves and other
function related settings.
9.3.3.3
Two step undervoltage protection UV2PTUV
Main menu/Settings/Setting Group N/Voltage protection/
UnderVoltage2Step(PTUV,27)/UV2PTUV:x
Section 9
1MRK511251-UEN B
Read and change settings
46
Operator's manual
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