Menu P3 - Line 1 Voltage Control; Menu P4 - Line 2 Voltage Control - LOVATO ELECTRIC ATL10 Manual De Instrucciones

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P2.08 – If, after sending an open or close command to a circuit breaker, this is not positioned correctly within this time, alarm A03 or A04 is generated. It works

when the auxiliary contacts of circuit breaker status are programmed and wired.

P2.09 – Minimum duration of an opening command pulse.

For the motorised circuit breaker application, it must be set to a time long enough to allow the load of the springs. This time is considered also when working in

continuous mode.

P2.10 – Duration of the closing command pulse.

P2.11 – If in automatic mode both sources are not available at the same time for a time exceeding P2.11, alarm A07 is generated.

P2.12 – If this parameter is enabled, after a transfer to the secondary line, restore to main line does not occur automatically when the latter becomes available

again, but it must be commanded in manual mode.

P2.13 – Time elapsing between line 1 loss and the sending of the transfer signal to the generator on the secondary line. This time is independent of the circuit

breaker opening time.

P2.14 – Time during which the generator is left in operation to cool after it has been disconnected from the load.

P2.18 – Enables or disables voltage control in MAN mode. If the control is enabled, no transfers are performed between the two lines, but the individual

switching device is opened/closed when its voltage goes beyond / returns within limits.

P2.19 – Defines the performance of the open/close command outputs when working in continuous command mode and ATL10 is in RESET/OFF mode. This

parameter can be useful when working with contactors.

P2.20 – Delay between the EJP start signal and the effective start signal sent to the generator.

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 intervention 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 intervention delay. See paragraph Voltage

Controls.

P3.07 - P3.08 – Voltage threshold below which a phase loss intervention 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 voltage rating, and P3.10 defines the related intervention

delay. This control may be disabled by setting P3.09 to OFF.

P3.11 - P3.12 – Threshold (it may be disabled) and intervention delay for minimum frequency.

P3.13 - P3.14 – Threshold (it may be disabled) and intervention 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 energized.

P3.16 – Delay for Line 1 restore to the limit range, used when the load can be connected to line 2. Generally longer than P3.15, as the load is energized and

consequently it is possible to wait longer before considering voltage steadily 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