Technical information

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1SDC210033D0202
Ekip M-LRIU
Main characteristics:
Q available for XT2 and XT4 in the three-pole version, this device is generally used for protecting
integrated motors;
Q protections:
– against overloads (L): 0.4...1xIn adjustable threshold. The operating time is established by
choosing the operating class defined by standard IEC 60947-4-1;
– rotor locking (R): with adjustable threshold in the OFF position or from 3...9xI
1
, with settable
operating time;
– against instantaneous short-circuits (I): with adjustable threshold from 6...13xIn and instanta-
neous operating time;
– against phase loss (U): with adjustable threshold in the ON or OFF positions;
Q setting:
– manual setting using the relative dip-switches on the front of the trip unit, which allow the
settings to be made even when the trip unit is off;
– electronic setting, made both locally using Ekip T&P or Ekip Display accessory and via remote
control, by means of the dialogue unit Ekip Com. Use of electronic setting allows other func-
tions to be activated:
- function for protection against earth faults (G): 0.2..1xIn adjustable protection threshold,
with a time constant trip curve;
- duty mode setting (Normal/Heavy):
- the Normal duty mode requires use of a circuit-breaker and a contactor. In the case of
tripping, the Ekip M-LRIU release commands the opening of the contactor via PR212/CI;
- the Heavy duty mode foresees circuit-breaker opening for all overcurrent conditions, and
just the function of motor operation is entrusted to the contactor;
- BACK UP function:
- this protection is designed to handle the situation whereby, in the Normal duty mode, the
opening command transmitted to the contactor via PR212/CI has not been implement-
ed, i.e. the contactor has not tripped. If this happens, the Ekip M-LRIU release transmits
a trip command directly to the circuit-breaker after having waited a time defined. A wait-
ing time between the command transmitted to the contactor and the back-up command
transmitted to the circuit-breaker is required so as to take the contactor opening time
into account;
- PTC protection setting:
- PTC: this protection, monitors the temperature inside the protected motor by means
of a PTC sensor. If the temperature is too high, the Ekip M-LRIU release will command
contactor opening (if the mode is “Normal”) or circuit-breaker opening (if the mode is
“Heavy”). To realize this protection is necessary to order the connector available for PTC;
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 flashing red light, indicates alarm for current exceeding setted threshold;
- fixed LED ELT show the kind of active parameters;
- LRIU: 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 find out which protec-
tion function tripped the trip unit;
– Ekip M-LRIU is equipped with a trip coil disconnection detection device that detects whether
the opening solenoid has disconnected. Signalling is made by all the LEDs flashing simulta-
neously;
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, the protection function test to be carried out, and electronic setting of the protec-
tion function of the release and of the communication parameters;
Q thermal memory always active;
Q self-supply from a minimum current of 0.2xIn up;