LC1D18R7 SQUARE D, LC1D18R7 Datasheet - Page 16

• Manufacturer Part Number: LC1D18R7
• Description: IEC Contactor
• Manufacturer: SQUARE D

Specifications of LC1D18R7

• No. Of Poles: 3
• Contact Configuration: 3PST-NO
• Relay Mounting: DIN Rail
• Coil Voltage Vac Nom: 440V
• Relay Terminals: Screw Clamp
• Width: 45mm
• Coil Resistance: 2.24kohm
• Nom Operating Power: 10kW
• External Width: 45mm
• Operating Voltage: 600VAC
• Switching Power Ac1: 3hp
• Switching Power Ac3: 15hp
• Switching Current Ac1: 32A
• Switching Current Ac3: 18A
• Load Current Inductive: 18A
• Load Current Resistive: 32A
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Definitions of Utilization Categories
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2001-2004 Schneider Electric All Rights Reserved
Definitions of Utilization Categories
IEC contactors should be selected according to the utilization category which is a combination of
application and duty cycle rates defined by the following:
• The type of application (inductive motor loads or resistive loads)
• The conditions under which making or breaking current takes place (motor starting or running,
• Number of making and breaking operations (or cycles) required for the life of the contactor
Utilization Categories for Contactors Conforming to IEC 60947-4
Type of
Application
AC Applications
DC applications
Utilization Categories for Auxiliary Contacts and Control Relays Conforming to IEC 60947-5
Type of
Application
AC Applications
DC Applications
reversing, plugging or jogging, locked rotor or stalled motor)
Utilization
Category
Category AC-1
Category AC-2
Category AC-3
Categories AC-4
and AC-2
Category DC-1
Category DC-3
Category DC-5
Utilization
Category
Category AC-14
Category AC-15
Category DC-13
Definition
This category applies to AC loads with a power factor greater than or equal to 0.95 (cos
Application examples: heating, distribution.
This category applies to starting, plugging, and inching of slip ring motors.
On closing, the contactor makes the starting current, which is about 2.5 times the rated current of the
motor. On opening, it must break the starting current at a voltage less than or equal to the mains
supply voltage.
This category applies to squirrel cage motors with breaking during normal running of the motor.
On closing, the contactor makes the starting current, which is about 5 to 7 times the rated current of
the motor. On opening, it breaks the rated current drawn by the motor; at this point, the voltage at the
contactor terminals is about 20% of the mains supply voltage. Breaking is light.
Applications examples: all standard squirrel cage motors — lifts, escalators, conveyor belts, bucket
elevators, compressors, pumps, mixers, air conditioning units, and so forth.
These categories cover applications with plugging and inching of squirrel cage and slip ring motors.
The contactor closes at a current peak which may be as high as 5 or 7 times the rated motor current.
On opening, it breaks this same current at a voltage which is higher as the motor speed lessens. This
voltage can be the same as the mains voltage. Breaking is severe.
Application examples: printing machines, wire drawing machines, cranes, hoists, metallurgy industry.
This category applies to all types of DC load with a time constant (L/R) of less than or equal to 1 ms.
This category applies to starting, counter-current braking, and inching of shunt motors. The time
constant is less than or equal to 2 ms.
On closing, the contactor makes the starting current, which is about 2.5 times the rated motor current.
On opening, the contactor must be able to break 2.5 times the starting current at a voltage which is
less than or equal to the mains voltage. The slower the motor speed, and therefore the lower its back
e.m.f., the higher this voltage. Breaking is difficult.
This category applies to starting, counter-current braking and inching of series wound motors.The
time constant is less than or equal to 7.5 ms.
On closing, the contactor makes a starting current peak which may be as high as 2.5 times the rated
motor current. On opening, the contactor breaks this same current at a voltage which is higher as the
motor speed lessens. This voltage can be the same as the mains voltage. Breaking is severe.
Definition
This category applies to the switching of electromagnetic loads whose power drawn with the
electromagnet closed is less than 72 VA.
Application example: switching the operating coil of contactors and relays.
This category applies to the switching of electromagnetic loads whose power drawn with the
electromagnet closed is greater than 72 VA.
Application example: switching the operating coil of contactors.
This category applies to the switching of electromagnetic loads for which the time taken to reach 95%
of the steady state current (T=0.95) is equal to 6 times the power P drawn by the load (with P 50 W).
Application example: switching the operating coil of contactors without economy resistor.
0.95).
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