(7)
DIR 1000587R0002 (Version 02)
2.3.2.
LED
The following table shows LEDs signaling in accordance with the IEC standard 60073 (clause 4.2.3.2).
Type of information
Flashing slowly
(0,5Hz)
Flashing fast (2Hz)
LED fl ashing
with two 0.5 sec
pulses every 2 sec
LED fl ashing
with one
pulse every
3 sec
LED on permanently
All
LEDs
Single
LED
All
LEDs
Single LED
All
LEDs
Single
LED
Single LED
All
LEDs
Single LED
RED
ORANGE
RED
RED
ORANGE
RED
ORANGE
ORANGE
RED
RED
ORANGE
TC error or TC disconnected
CS error or disconnected
Rating Plug/Installation error
(1)
Protection timer error
Last trip
(2)
Test button pressed and no failure
detected
(3)
L pre-alarm
Confi guration error
(4)
Settings inconsistency
Normal operation of the trip unit
(5)
CB Undefi ned or
CB status error
(1) Rating plug disconnected or In > Iu.
(2) The LED of the protection that has tripped or is being timed comes on to display the information. If it is the last trip, the LED
remains on for 2 sec or with fi xed light when there is external 24V power supply or battery: 140G-ELBU.
(3) The information is displayed with all the leds on for as long as the test button remains depressed, or for 2 seconds if it is
pressed once.
(4) Installed values differ from those stored by the trip unit: installation required (see par. 2.6.1).
(5) In the absence of other information, “normal operation” is signalled 3s after the trip unit has been turned on.
ATTENTION: the LEDs only function if the trip unit has been powered. Once powered, the LEDs can be displayed
for approximately 48 hours. To maintain trip status beyond 48 hours, use of separate 24V DC power source is
recommended.
2.3.3. iTest
button
The itest button can be used for different functions:
- with the trip unit off, it allows to check the last recorded event (when pressed for about 1 second). The function is guaranteed
for 48 hours after switch-off (absence of internal or external power supply).
- with the trip unit energized by battery unit alone and with the CB open, it allows installation on the CB to be performed (see
par. 2.6.1).
- with the trip unit energized by battery unit and the CB closed, it allows performance of the LED test (when pressed for 3 seconds)
and the trip coil operation test (when pressed for 7 seconds) with consequent opening of the CB.
- It allows the Trip signal to be reset (when pressed for about 1 second) after a trip, with the trip unit on.
2.3.4. Test
connector
The front test connector allows battery unit 140G-ELBU to be connected for temporary powering of the trip unit.
Consult the chapters dedicated to the accessory modules for further details.
2.4. Protection
functions
LSIG handles up to 5 independent protection functions.
The current signal from the current sensors is processed by the trip unit which, depending on the protection parameter settings,
indicates alarms, performs delay processes and sends commands.
All the adjustable protections process according to the true root mean square value of the current values read by means of the
current sensors.
Each protection has an alarm led, which comes on in the case of delays (fl ashing) or trips (fi xed) and goes out when normal
conditions restored
ATTENTION: when activated, the protections must respect the following rule:
I
1
(protection L) < I
2
(protection S) and I
2
(protection S) < I
3
(protection I).
When the trip unit is on, an incorrect protection threshold setting is signalled by the front leds (inconsistent settings).
The trip unit has a “backup-protection” function. If the fi rst command transmitted to the trip coil fails to im-
mediately open the circuit-breaker (partial TC failure), further trip commands are sent until it opens (absence of
current and CB open).
NOTE:
2.4.1 through 2.4.6 explains each of the protection functions independently. Actual behavior of a circuit breaker depends
on combination of settings for each protection function and is summarized in 2.4.7.
