Menu P3 - Line 1 Voltage Control; Menu P4 - Line 2 Voltage Control - LOVATO ELECTRIC ATL20 Manual Operativo

MENU P3 - LINE 1 VOLTAGE CONTROL

PAR Function
P3.01 Minimum voltage threshold - trip
P3.02 Minimum voltage threshold - restore
P3.03 Minimum voltage threshold delay
P3.04 Maximum voltage threshold - trip
P3.05 Maximum voltage threshold - restore
P3.06 Maximum voltage threshold delay
P3.07 Phase loss threshold
P3.08 Phase loss threshold delay
P3.09 Voltage unbalance threshold
P3.10 Voltage unbalance threshold delay
P3.11 Minimum frequency threshold
P3.12 Minimum frequency threshold delay
P3.13 Maximum frequency threshold
P3.14 Maximum frequency threshold delay
P3.15 Line 1 restore within limits delay (when line 2 source not available)
P3.16 Line 1 restore within limits delay (when line 2 source is available)
P3.01 - P3.02 - P3.03 - The first two parameters define the minimum voltage threshold and the related hysteresis upon restore. P3.02 cannot
be set to a lower value than P3.01. P3.03 defines the trip delay of this protection. See paragraph Voltage Controls.
P3.04 - P3.05 - P3.06 - The first two parameters define the maximum voltage threshold and the related hysteresis upon restore. P3.05 cannot
be set to a value exceeding P3.04. Setting P3.04 to OFF will disable the maximum voltage control. P3.06 defines the maximum voltage trip delay.
See paragraph Voltage Controls.
P3.07 - P3.08 - Voltage threshold below which a phase loss trip occurs, generally quicker than the drop. The delay for the phase loss is
specified by P3.08.
P3.09 - P3.10 - P3.09 defines the maximum threshold for unbalance between phases, referred to rated voltage and P3.10 defines the related
trip delay. This control may be disabled by setting P3.09 to OFF.
P3.11 - P3.12 - Threshold (it may be disabled) and trip delay for minimum frequency.
P3.13 - P3.14 - Threshold (it may be disabled) and trip delay for maximum frequency.
P3.15 - Delay for Line 1 restore to the limit range, used when the line 2 source is not available. Generally shorter than P3.16, as there is the
urgent need to supply power because the load is not energised.
P3.16 - Delay for Line 1 restore within limit range, used when the load can be connected to line 2. Generally longer than P3.15, as the load is
energised and consequently it is possible to wait longer before considering voltage stability restored.
MENU P4 – LINE 2 VOLTAGE CONTROL
PAR Function
P4.01 Minimum voltage threshold - trip
P4.02 Minimum voltage threshold - restore
P4.03 Minimum voltage threshold - delay
P4.04 Maximum voltage threshold - trip
P4.05 Maximum voltage threshold - restore
P4.06 Maximum voltage threshold delay
P4.07 Phase loss threshold
P4.08 Phase loss threshold delay
P4.09 Voltage unbalance threshold
P4.10 Voltage unbalance threshold delay
P4.11 Minimum frequency threshold
P4.12 Minimum frequency threshold - delay
P4.13 Maximum frequency threshold
P4.14 Maximum frequency threshold - delay
P4.15 Line 2 restore within limits - delay (when line 1 source not available)
P4.16 Line 2 restore within limits - delay (when line 1 source is available)
Note - For details on the functions of parameters see the previous page concerning Line 1 menu.
Range Default
70...98% 85% Ue
75...100% 90% Ue
0.1 .... 900s 1.0s
102...120% / OFF 115% Ue
100...115% 110% Ue
0.1 .... 900s 1.0s
60...85% / OFF 70% Ue
0.1...30.0s 0.1s
1...20% / OFF 15%
0.1...900s 5.0s
OFF / 80...100% Fe 95%
0.1...900s 5.0s
101...120% Fe / OFF 105%
0.1...900s 3.0s
1...3600s 10s
1...3600s 60s
Range Default
70...98% 85% Ue
75...100% 90% Ue
0.1....900s 1.0s
102...120% / OFF 115% Ue
100...115% 110% Ue
0.1....900s 1.0s
60...85% / OFF 70% Ue
0.1...30.0s 0.1s
1...20% / OFF 15%
0.1...900s 5.0s
OFF / 80...100 % Fe 95%
0.1...900s 5.0s
101...120% Fe / OFF 105%
0.1...900s 3.0s
1...3600s 10s
1...3600s 60s
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