Status Leds; Operating Mode Selection; Off-Reset Mode; Man Mode - LOVATO ELECTRIC ATL10 Manual De Instrucciones

STATUS LEDS

– Some LEDs are present on the front panel; they show the status of the unit and/or the circuit breakers it controls
– The following table details the meaning of the different LEDs:
LED COL.
1 Red
2,3 Green
Yellow ‚
4,5
6 Red
7 Red
8 Red
9 Red
‚
If auxiliary signals (feedback) have been suitably connected and programmed, the LEDs represent the circuit breakers status; otherwise they represent the status of control outputs.

OPERATING MODE SELECTION

– The three keys OFF-RESET / MAN / AUT allow to select the required operating mode, which will be shown when the corresponding red LED lights up
– The selected operating mode is kept when power supply is removed and then restored
– If the LED showing the selected operating mode flashes, it indicates that the unit is communicating through the serial interface and that it might perform
commands given from remote, including even the change of the mode itself.

OFF-RESET MODE

– In this mode the unit is disabled, and does not perform any actions
– All visual displays, concerning both measures and status LEDs, remain active
– If the control of changeover devices is the pulse-type, in OFF-RESET both controls remain disabled. On the contrary, if it is in continuous control mode, the
behaviour depends upon P2.19 programming
– To access programming menus it is always necessary to shift to OFF-RESET mode beforehand
– By pressing the OFF-RESET key retentive alarms can be cleared, provided that the conditions generating the alarm have been removed.

MAN MODE

– In MAN mode it is possible to control circuit breakers manually by pressing the relevant key (F and E keys) for a minimum time of 300ms
– At each key pressure the circuit breaker status is switched over. The command is accepted only when 1sec has elapsed from the end of the previous
switching
– If a manual command is given to close a circuit breaker while the other is still closed, the unit will first open the other circuit breaker and then close the one
commanded, while interposing the programmed interlock time
– When operating with a generator set, the generator startup and shutdown can be manually commanded on the secondary line by pressing and holding down
the MAN key for 5 seconds.

AUT MODE

– In automatic mode the unit itself performs both circuit breaker opening and closing operations, the startup and shutdown of the generator set, if any
– When the main line exceeds the limits, after the set delay times (line presence green LED off), the unit disconnects the load from the main line and connects
it to the secondary line, controlling both the startup of the generator set, if any, and the handling and interlock times between circuit breakers
– The unit may be programmed to disconnect the load from the main line before or after the secondary line has been made available
– When the main line returns within the limits, the unit switches over the load again and controls the generator set cooling cycle, if any
– Automatic operating cycles vary both as a function of the type of application (utility-to-utility, utility-to-generator) and as a function of the type of switching
devices used (motorised circuit breakers, switches or contactors).

MAIN LINE FAILURE SIMULATION

– Starting from the AUT mode, it is possible to simulate a 1 min. voltage failure on the main line
– The unit will respond in the same manner and timeframe set for standard automatic operation. The proper operation of transfer cycles may thus be controlled
– Starting from AUT mode, press the AUT key and the line 2 ON-OFF key together for 10 consecutive seconds
– The letters F.SI (Failure Simulation) will be shown on the display during the execution of the whole cycle
– To stop the test before completion, repeat the starting procedure or switch to OFF – RESET mode.

UTILITY-TO-GENERATOR APPLICATION

– In the utility-to-generator application (U-G, default setting) the load is usually connected to the utility (Line 1)
– Following voltage or frequency anomaly, after the delay set in P2.13, a start signal is sent to generator (Line 2)
– When generator voltage is within programmed limits, the load is connected to the generator end until the utility line reverts to standard values
– At this time the load is transferred back and the generator is kept in operation without load for a time set by P2.14 to allow it to cool down
– The ATL10 switch sends a start/stop command to the generator through a relay output and can receive digital signals from the generator indicating its status
(generator ready, ok to load taking, etc) through programmable inputs.
ON OFF
Measure selection
Voltage and Voltage or frequency
frequency within limits out of limits
Breaker closed Breaker opened
OFF / RESET Mode
MAN Mode
AUT Mode
FLASHING
G
B
Presence or absence
delay time running
Breaker in operation
OFF / RESET Mode,
Remote control active
MAN Mode,
Remote control active
AUT Mode,
Remote control active
Alarm active
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