Features • • • #14−4 Compression Lugs with .250” (6.35mm) QC Terminals Silver Cadmium Oxide Contacts UL 508 File No. E227250 Class NLDX2, NLDX8 RLY550 Series Contactors, Definite Purpose, 50 FLA, 3 Pole NO D92 3.775 (95.89) 2.750 (69.85) 4.000 (101.6) AC OPERATED Coils Contacts Input Voltage Nom. Sealed Contact Arr. Max. Contact Cur. @ 600VAC Diag No. RLY550−3−24 24 VAC 13 VA 3PST−NO 50A D92 RLY550−3−120 120 VAC 13 VA 3PST−NO 50A D92 RLY550−3−240 240 VAC 13 VA 3PST−NO 50A D92 NTE Type No. 3.125 (79.38) Motor Rating in Amps Resistive Locked Rotor Number of Poles Full Load @ 600VAC @ 240VAC @ 480VAC @ 600VAC 3 50A 65A 300A 250A 200A 2.188 (55.56) 2.030 (51.56) 1.470 (37.34) Motor Horsepower Ratings Motor Type @ 120VAC @ 240VAC @ 480VAC 1∅3P 3 HP 7.5 HP − − 3∅3P − 15 HP 25 HP 25 HP 1.470 (37.34) @ 600VAC 3.130 (79.5) ACCESSORIES NTE TYPE NO. DESCRIPTION Auxiliary Switch, 1 SPDT Snap Action Switch w/.250” QC Terminals RLY9190 Auxiliary Switch, 2 SPDT Snap Action Switches w/.250” QC Terminals RLY9191 Auxiliary Switch, 1 SPST−NO & 1 SPST−NC Switch w/.250” QC Terminals RLY9192 Auxiliary Switch, 1 SPST−NO & 1 SPST−NC Switch w/6−32 Screw Terminals RLY9193 Electrical Specifications Initial Dielectric Strength Between Contact and Coil: 2200 VAC Between Poles: 2200 VAC (includes shunt) Between Open Contacts: 2200 VAC (no shunt) Insulation System: 130°C Class B Power Pole Terminations: Aluminum Box Lug Wire Size: 14−2 Recommended Tightening Torque: 50 in. lbs. Quick Connects Coil Terminals: Dual: .250” QC or #6−32 Screw/.250” QC Power Terminals: Dual .250” QC Coil Nom Coil Restsance: 2.4Ω (24V); 45Ω (120V); 180Ω (240V) Max. Pick−up Voltage: 75% of nominal or less, DC Min Drop−out Voltage: 6−15V (24V); 20−70V (120V); 40−140V (240V) Nom Inrush (60Hz): 130 VA Max Coil Voltage: 30V (24V); 132V (120V); 264V (240V) Environmental Characteristics Operating: −40°C to +65°C Weight Std: 2 lbs (907.18 grams)—typical Note It is not recommended to mount or operate contactors upside−down. 98 NTE Electronics, Inc. Voice (973) 748−5089 FAX (973) 748−6224 http://www.nteinc.com