Inside Containment Areas EA740 Series Nuclear Qualified Products Limit Switches/ Receptacle Assembly... For Nuclear Environments Features: Technical Data: • Qualified to IEEE Standards 344-1975, 323-1974, andTwo normally open and two normally closed, NEMA 382-1972. form Z contact arrangement. Manufactured to a quality assurance program designedEnclosure meets NEMA 1, 4 and 13 requirements for to meet the requirements of 10CFR50, Appendix B, and dust-tight, water-tight and oil-tight applications. ANSI N45.2, as applicable.Operating lever is adjustable in 7°30' increments Die-cast bronze housing. through 360°. Stainless steel top cover and fasteners.Adequate wiring space for nine conductors. Gold-plated contacts.Rated at 21°C to 90°C. High temperature components throughout.Short term exposure to 175°C. High temperature lubricants.EA 740 has 18° pre-travel, maximum travel 90°. Pressure and radiation resistantWeight EA 740: 4.3 lbs.; EA 740 with Receptacle: 5.3 Seismic and vibration resistant. lbs. Resists chemical spray.DBE maximum test parameters — temperature 340°F, Three mounting styles. pressure 70 PSIG, radiation 204 megarads gamma. EA 740 has a cam action latching mechanism. Receptacle Data Qualified receptacle sealed in place. Qualified ring tongue terminal applied to leads. Continuous Current Rating Every assembly tested before shipment. 75-100% Power Factor* Qualified lead wires. Receptacle keyed for proper alignment of connector. 125 VAC 20 AMPS* All circuits wired. 250 VAC 15 AMPS* Circuits of receptacle identified the same as limit switch 480 VAC 10 AMPS* A, B, C, D, etc. 600 VAC 5 AMPS* 125 VDC 5 AMPS 250 VDC 1.5 AMPS EA740 Series Nuclear Qualified Products FOR INSIDE CONTAINMENT AREAS SWITCHES SHOULD BE SPECIFIED AS FOLLOWS: EA740 Series EA740 Series with Receptacle Se tandard Wg id Lon Se tandardWg id Lon Sn eries Operatio Sn eries Operatio EA740- EA740- C0 W 20 000 50 000 8000 C0 W20 00450 004 8004 EA740 EA740 C1 CW 21 000 51 000 8000 C1 CW21 00451 004 8004 Standard Standard CW & CCW CW & CCW 20 0100 50 010 8010 20 014050 014 8014 (B2 cam) (B2 cam) Maint. Maint. "M" 20 6000 50 600 8600 "M"20 604050 604 8604 Cam Cam EA740 EA740 Maint. Maint. Maint. Maint. "M7" 20 6700 50 670 8670 "M7"20 674050 674 8674 Cam Cam Male Receptacle Assemblies may be ordered separately. Please order part number EC290-19001. Dimensions ����� )�&(�#��&’�&( ���������������� ������ ��������������� ����� ����� ������ ������ ����� ������ ����� ����� ������ ������ ����� ����� ����� ����� ������ ������ ����� ������� �!� ������ ��������" ����� ����� ���������� ������� ������� %�!� #��&’�&( ����� ������� ����� ����� ������� ������� ������ ����� ����� *�+� ����� ����� ����� ������ ����� ������ ����� ������#�$� ������ ������ ����� ����� ������ ����� ����� ������ Nuclear Qualified Products EA740 Series Operational Data Standard Contacts For CW Switch For CCW Switch For CW & CCW Switch C C A A CW Initial CCW CW Initial CCW CW Initial CCW B D D H G H G H G B F E F E F E D C D C D C B A B A B A A. Trip Travel ................................................... 18° B. Reset Travel ............................................... 14° C. Recommended Travel ................................ 30° D. Total Travel Available ................................. 90° Torque to Trip (inch Lbs.) ........................... 27 2 N.O. — 2 N.C. Maintained Contacts & Lever Position Initial Initial Position Position For CW Switch For CCW Switch F D F Initial CCW Initial CCW A C CW CW A D C B B H G H G E E F E F E D C D C B A B A CCW Operating CW Operating CCW CW A. Trip Travel ................................................... 25° 55° B. Reset Travel ............................................... 25° 22° C. Min. Travel to Maintain .............................. 54° 55° D. Recommended Travel ................................ 60° 60° E. Total Travel ................................................. 124° 116° F. Overall Travel ............................................. 56° 64° G. Torque to Trip (inch Lbs.) ........................... 12 6 To change switch orientation from cam (left view) position to cam (right view) position, operate switch thru angle C. Remove lever and reset at initial position. Maintained Contacts — Lever Returned Initial Initial Position Position For CW Switch For CCW Switch C C D D CW Initial CCW CW Initial CCW B B A A H G H G E E E E F E F E D C D C B A B A CCW Operating CW Operating CCW CW A. Trip Travel ................................................... 16° 30° B. Reset Travel ............................................... 30° 26° C. Min. Travel to Maintain .............................. 26° 30° D. Recommended Travel ................................ 45° 45° E. Total Travel ................................................. 90° 90° F. Torque to Trip (inch Lbs.) ........................... 16.5 15 To change switch orientation from cam (left view) position to cam (right view) position, operate switch thru angle B. Remove lever and reset at initial position. EA740 Series Nuclear Qualified Products Accessories PLUG-IN CABLES: Cable lengths for the above Switch/ Receptacle Assemblies should be ordered with specific cable lengths as follows . . . Plug-In Cables Length EC290- 20 Ft. 29020 25 Ft. 29025 30 Ft. 29030 35 Ft. 29035 50 Ft. 29050 100 Ft. 29100 LEVERS: For use inside contain- ment area, levers with bronze arms and beryllium copper rollers are recommended. Note: Levers must be ordered as separate item. For information re- quest Lever Bulletin EL. ADAPTORS: Straight and elbow adapters are available for direct mounting into limit switches. See CD/ EH700 Series Bulletin. 2013 West Meeting Street  Lancaster, SC 29720  Technical Assistance: 1-800-NAMTECH © 2002 Namco Controls  www.namcocontrols.com  EADS04-G | 12/2002