LC1D18R7 SQUARE D, LC1D18R7 Datasheet - Page 30

• 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

Contactor Selection for Utilization Categories DC-1 to DC-5
30
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2001-2004 Schneider Electric All Rights Reserved
Use in Category DC-1 to DC-5
The criteria for contactor selection are:
• The rated operational current Ie.
• The rated operational voltage Ve (see page 31).
• The utilization category and the time constant L/R (see page 31)
• The required electrical durability.
Maximum Operating Rate (Operating Cycles)
The following operating rate must not be exceeded: 120 operating cycles/hour at rated operational
current Ie.
Electrical Durability
Example: Series-wound motor with P = 1.5 kW, Ve = 200 V, and Ie = 7.5 A.
Use of Poles in Parallel
Electrical durability can be increased by using poles connected in parallel. With N poles connected in
parallel, the electrical durability becomes: electrical durability read from the curves x N x 0.7.
NOTE: Connecting the poles in parallel does not allow the maximum operational currents indicated on
pages 28 and 29 to be exceeded.
NOTE: Ensure that the connections are made in such a way as to equalize the currents in each pole.
0.08
0.06
0.04
0.02
0.01
0.8
0.6
0.4
0.2
0.1
10
8
6
4
2
1
0.2
0.3
Application: counter-current braking and inching (utilization category DC-5).
Select a contactor type LC1D25 or LP1D25 with 3 poles in series.
The power broken is: Pc total = 2.5 x 200 x 7.5 = 3.75 kW.
The power broken per pole is: 1.25 kW.
The electrical durability read from the curve above is
0.4 0.5 0.6
0.7
0.8
0.9
1
2
3
4
5
6
7
8
9
10
14
106 operating cycles.
16
20
24
30
32 36
Power broken per pole in kW
40 50 60 70 90
80
100
01/04