9.3.4.11 Sensitive directional residual over current and power protection
SDEPSDE
Main menu/Settings/Setting group N/Current protection/
SensDirResOvCurr(PSDE,67N)/SDE
Includes voltage, current, operation mode and timer settings.
9.3.4.12
Thermal overload protection, two time constants TRPTTR
Main menu/Settings/Setting Group N/Current protection/
ThermalOverload2TimeConst(PTTR,49)/TTR
Displays some instances of TRPTTR with several settable parameters per instance.
Typical settings are length of pulse for trip signal, reference current as a percentage
of the base system current and several other related settings.
9.3.5 Voltage protection
9.3.5.1 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.
9.3.5.2 Overexcitation protection OEXPVPH
Main menu/Settings/Setting Group N/Voltage protection/
Overexcitation(PVPH,24)/OEX1
Displays settable parameters for operation, rated current and voltage, time delays
for user designed curves and several other related settings.
9.3.5.3 Two step overvoltage protection OV2PTOV
Main menu/Settings/Setting Group N/Voltage protection/
OverVoltage2Step(PTOV,59)/TOV
Displays several settable parameters including settings for IDMT curves and other
function related settings.
9.3.5.4 Two step residual overvoltage protection ROV2PTOV
Main menu/Settings/Setting Group N/Voltage protection/
ResidualOverVoltage2Step(PTOV,59N)/TRV
1MRK 502 014-UEN C Section 9
Read and change settings
53
Operator's manual
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