Technical information

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1SDC210033D0202
Ekip M-LIU
Main characteristics:
Q available for XT2 and XT4 in the three-pole version, this device protects motors. The L protection
function protects the motor against overloads, in accordance with the indications and classes
defi ned by standard IEC 60947-4-1;
Q protections:
– against overloads (L): 0.4...1xIn adjustable threshold. The operating time is established by
choosing the operating class defi ned by Standard IEC 60947-4-1: Class 3E, 5E, 10E, 20E;
– against short-circuits (I): 6...13xIn adjustable threshold with instantaneous operating time;
– against phase loss (U): the protection can be selected either in the ON or OFF position. When
the selector is in the ON position, the threshold is 50% I
1
, with fi xed operating time;
Q manual setting using the relative dip-switches on the front of the release;
Q LED:
– LED on with steady green light indicating that the trip unit is supplied correctly. The LED
comes on when the current exceeds 0.2xIn;
– red LED for each protection:
- L: LED with steady red light, indicates pre-alarm for current exceeding 0.9xI
1
;
- L: LED with fl ashing red light, indicates alarm for current exceeding setted threshold;
- LIU: LED with steady red light, shows that the protection has tripped. After the circuit-
breaker has opened, connect the Ekip TT or Ekip T&P accessory to fi nd out which protec-
tion function tripped the trip unit;
– release Ekip M-LIU is equipped with a trip coil disconnection detection device that detects
whether the opening solenoid has disconnected. Signalling is made by all the red LEDs
fl ashing simultaneously;
Q test connector on the front of the release:
– to connect the Ekip TT trip test unit, which allows trip test, LED test and signalling about the
latest trip happened;
– to connect the Ekip T&P unit, which allows the measurements to be read, the trip test to be
conducted and the protection function test to be carried out;
Q thermal memory always active;
Q self-supply starting from a minimum current of 0.2xIn.
Ekip M-LIU
Protection function Trip threshold Trip curve
(1)
Excludability Relation Thermal
memory
Against overloads with long
inverse time delay according
to IEC 60947-4-1 Standard
Manual setting:
I
1
= 0.4...1xIn step 0.04
Tolerance:
trip between 1.05…1.2xI
1
Manual setting:
Operating class:
3E, 5E, 10E, 20E
Tolerance: ±10% up to 4xIn
±20% from 4xIn
– t = k/l
2
Yes
Against short-circuits with
adjustable threshold and
instantaneous trip time
Manual setting:
I
3
= 6...13xIn step 1
Tolerance: ±10%
)20ms – t = k –
Aganist phase loss with
indipendend time delay
(IEC 60947-4-1)
Manual setting:
I
6
= ON / OFF
When ON, I
6
=50% I
1
Tolerance: ±15%
Manual setting:
When ON, t
6
= 2s
Tolerance: ±10%
Yes t = k –
L, I, U protection LED
Test connector
Dip switch for L protection
function setting
Power-on LED
Dip switch for I protection
function setting
Dip switch for the trip classes setting
according to IEC 60947-4-1
U protection function ON-OFF
(1)
Tollerances in case of:
– self-powered trip unit at full power;
– 2 or 3 phase power supply.
In conditions other than those considered,
the following tollerance hold:
Protection Trip threshold Trip time
L
release between 1.05 and 1.2 x I
1
±20%
I
±15% )60ms
U
±20% ±20%
Slot for lead seal
Circuit-breakers for motors protection
Electronic trip units