Square D Digest 179

TeSys™ Deca Contactors Refer to Catalog MKTED210011EN

Contactor Accessories

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RC and Varistor Coil Suppressors

RC Coil Suppressor • Limitation of transient voltage to 300% of nominal voltage maximum. • Oscillating frequency limited to 400 Hz maximum. Slight increase in drop-out time (1.2–2 times normal). Table 17.50: Resistor/Capacitor Circuit (RC) for Reduction of Electrical Noise in AC Contactor Coils Installed by Mounting on Operating Voltage 50/60 Hz

Catalog Number LAD4RCE LAD4RCG LAD4RCU LAD4RC3E LAD4RC3G LAD4RC3U LAD4RC3N LA4DA2E LA4DA2G LA4DA2U LA4DA2N

LA4DA1U

24–28Vac 50–127Vac 110–240 Vac 24-48Vac 50–127Vac 110–240 Vac 380–415 Vac 24–48Vac 50–127Vac 110–240 Vac 380–415 Vac

LC●D09–D38 (3P), LC1DT20–DT40 (4P)

Snapping into the cavity on the right side without tools [19]

LC1D40A–65A (3P), LC1DT60A–DT80A (4P)

Snap-on mounting, and connection without tools to the contactor coil terminals

LC●D80–D150 (3P), LC1D80–D115 (4P)

Screw connection to the contactor coil terminals

Varistor Coil Suppressor [20] • Limitation of transient voltage value to 200% of nominal voltage maximum. • Maximum reduction of transient voltage peaks. Slight increase in drop-out time (1.1– 1.5 times normal). Table 17.51: Varistor (Peak Limiting) for Reduction of Electrical Noise in AC Contactor Coils Installed by Mounting on Operating Voltage

Catalog Number LAD4VE LAD4VU LAD4V3E LAD4V3U LA4DE2E LA4DE2U LA4DE3E LA4DE3U

LC●D09–D38 (3P), LC1DT20–DT40 (4P) LC1D40A–D65A (3P), LC1DT60A–DT80A (4P) LC●D80–D115 (3P) LC1D80–D115 (4P) LC●D80–D95 (3P) LC1D80 (4P)

24–48Vac 110–250 Vac 24–48 Vac/Vdc 110–250 Vac/Vdc

Snapping into the cavity on the right side without tools [19] Snap-on mounting, and connection without tools to the contactor coil terminals Screw connection to the contactor coil terminals Screw connection to the contactor coil terminals Diode Coil Suppressor

24–48Vac 110–250 Vac 24–48Vdc 110–250 Vdc

17 CONTACTORS AND STARTERS-IEC

• No overvoltage or oscillating frequency. • Polarized component. Increased drop-out time (6–10 times normal). Table 17.52: Diode for Reduction of Electrical Noise in DC Contactor Coils Installed on the upper part by Mounting on Operating Voltage, DC

Catalog Number LAD4DDL

LC●D09 to D38 (3P), LC1DT20 to DT40 (4P) LC●D40A to D65A (3P), LC1DT60A to DT80A (4P) LC●D80 to D95 (3P), LC1D80 (4P)

Snap-on mounting and connection w/o tools to the contactor coil terminals

24–250Vdc

Clip-on front mounting

24–250Vdc

LAD4D3U

LA4DC3U

Screw connection of wire to the contactor coil terminals

24–250Vdc

LA4DC3U

[19] Installing the suppressor into the cavity makes the electrical connection. Overall width of the contactor remains the same. [20] For additional accessory and replacement part options, see Catalog MKTED210011EN. Check with local sales office for availability.

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