To achieve the voltage slope characteristics, Voltage high limit must
always be set to a value greater than Voltage low limit.
If Voltage high limit is lower than Voltage low limit, the voltage step
characteristic is active with Voltage low limit being the cutoff value.
The value of the setting Pickup value should always be greater than the
setting Pickup value low. Otherwise, Pickup value low is used as the
effective pickup value.
External input control mode
The External input control mode is used to enable voltage control from an external
application. If Control mode is set to the "Input Control" mode, the effective pickup value
for all phases is influenced by the status of the binary input ENA_V_MULT.
If ENA_V_MULT is TRUE:
Effective pickup value = Pickup valuee low
GUID-6FAAB486-772A-4A2D-A267-87C3778F2175 V1 EN (Equation 7)
If ENA_V_MULT is FALSE:
Effective pickup value = Pickup valuue
GUID-32BD51B9-7EE5-4FCB-B576-709044E6E188 V1 EN (Equation 8)
Voltage and input control mode
If Control mode is set to "Voltage and input Ctrl", both the "Voltage control" and "Input
control" modes are used. However, the “Input control” functionality is dominant over the
“Voltage control” mode when ENA_V_MULT is active.
No voltage dependency mode
When Control mode is set to "No Volt dependency", the effective pickup value has no
voltage dependency and the function acts as a normal time overcurrent function with
effective pickup value being equal to the Pickup value setting.
Level detector
The measured phase currents are compared phasewise to the calculated effective pickup
value. If the measured value exceeds the calculated effective pickup value, the Level
detector reports the exceeding value to the phase selection logic. If the ENA_MULT input
is active, the effective pickup value is multiplied by the Pickup value Mult setting.
Section 4 1MAC059074-MB A
Protection functions
262 615 series ANSI
Technical Manual
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