design features & performance conStruction – Completely fabricated from non- corrosive materials, its bronze housing and high quality stainless steel shaft completely protect against external damage to the switch from salt spray or other corrosive elements. Sealing against leakage is achieved through the use of high quality gaskets on machined surfaces and “0” Ring protection, plus close tolerance between the shaft and bushing. durAbility – All internal components are of high grade stainless steel or copper alloy (chrome plated when required), to protect against bearing surface wear and to provide millions of operations. Both the EA780 and EA790 series switches have heavy duty electrical contacts. The EA780 switches have sliding, double break type contacts built to meet the high shock requirements outlined in MIL-S-901. EA790 switches have heavy duty, double break butt type contacts. contActS – The EA780 switches are available in two contact arrangements 1 N.O. - 1 N.C. & 2 N.O. - 2 N.C. The Standard B1 cam provides for clockwise or counter-clockwise operations; B2 cam for operation in both directions (clockwise & counter-clockwise) or Maintained is also available. Contacts wipe clean with each operation. The EA790 switch is available in two contact arrangements, 1 N.O. - 1 N.C. & 2 N.O. - 2 N.C. with B1, B2, Neutral, Maintained & Short Travel Cam Operations. lEvErS – A variety of corrosion resistant levers are available to meet specific actuating requirements. NOTE: Levers must be ordered as separate items. Please see “EL” series operating lever brochure. dimensions and Mounting dimensions 3.19 48 SERRATIONS (81.0) .260 / .255 DIA. EQUALLY SPACED .92 .50 4 HOLES (23.3) (12.7) . 495 / . 490 O.D. .41 (10.4) 1.06 .28 1.31 .66 (26.9) (7.1) (33.2) (16.7) .53 .44 (13.4) (11.1) .68 (17.2) 1 /4 20 THD. 2.62 .38 DEEP (66.5) G A B 4 HOLES E F D .12 (3.0) 1.12 .02 1.59 C 2.81 1.81 .22 .22 (28.4) (0.5) (45.9) (5.5) (40.3) (71.3) (5.5) 2.60 2.25 (66.0) 3.25 2.25 PIPE (57.1) (82.5) MAX. (57.1) TAP 2.28 (57.9) Standard Mounting Wide Mounting long Mounting All dimensions given in US & Metric: Inches (mm) STANDARD SWITCH MOUNTING STYLE CONTACT WIDE LONG PIPE TAP SEQUENCE A B C SIZE D E F G 1 N.O.-1 N.C. 1/2" - 14 NPT 4.94 3.00 .62 2.44 3.00 4.22 4.84 2 N.O.-2 N.C. 1-11 1/2 NPT 7.06 4.94 .81 4.38 4.94 6.41 7.06 56 www.namcocontrols.com SpECial fUNCTiON SwiTCHES rOCKEr TYpE SwiTCHES Cam OpEraTEd NavY/mariNE limiT SwiTCHES Ea780/790 1-800-nAMtEcH SpECial fUNCTiON SwiTCHES ® SNap-lOCK Ea780/790 Specifications 1. Conforms to MIL-C-2212F. 2. Enclosure meets NEMA Type 1, 4, 4X, 6, 6P and 13. 3. Watertight (3 ft. for 60 mintues) and submersible (15 ft. for 30 minutes) per MIL-STD-108E. 4. Meets vibration requirements of MIL-STD-167B, type I. 5. Meets Hi Shock requirements of MIL-S-901, Grade A, ClassI, type A. 6. Contacts made of silver alloy. Contact shifting mechanism is locked in position by the latches until switch lever is actuated. 7. TEMPERATURE RANGE: -20˚C to +90˚C. Modifications available for temperatures to +150˚C and -40˚C continuous. 8. Operating lever is adjustable by 7˚30' increments thru 360˚. 9. Operating Torques -- Trip Torque varies from 6 to 33 in. lbs. depending on switch size and cam selected. 10. Current Ratings: Switch Series Voltage EA790 EA780 125V-A.C. 20.0 Amps* 10.0 Amps* 250V-A.C. 15.0 Amps* 7.5 Amps* 480V-A.C. 10.0 Amps* 5.0 Amps* 600V-A.C. 5.0 Amps* 2.5 Amps* 125V-D.C. 5.0 Amps* 2.5 Amps* 250V-D.C. 1.5 Amps* .75 Amps* *75-100% Power Factor Form Z Contact. 11. 57 ordering information EA780-Sliding contacts CONTACT CAM & MOUNTING STANDARD WIDE LONG CONFIGURATION OPERATION B-1 CW EA780-10000 EA780-40000 EA780-70000 1 N.O. B-1 CCW EA780-10001 EA780-40001 EA780-70001 1 N.C. B-2 CW & CCW EA780-10100 EA780-40100 EA780-70100 B-1 CW EA780-20000 EA780-50000 EA780-80000 2 N.O. B-1 CCW EA780-20001 EA780-50001 EA780-80001 2 N.C. B-2 CW & CCW EA780-20100 EA780-50100 EA780-80100 1 N.O./1 N.C. EA780-16000 EA780-46000 EA780-76000 MAINTAINED* M CAM 2 N.O./2 N.C. EA780-26000 EA780-56000 EA780-86000 1 N.O./1 N.C. MAINTAINED* EA780-16700 EA780-46700 EA780-76700 M-7 CAM 2 N.O./2 N.C. EA780-26700 EA780-56700 EA780-86700 Series EA780 Series EA790 Series EA790 Sliding type butt type BUTT TYPE EA-790-butt contacts CONTACT CAM & MOUNTING STANDARD WIDE LONG CONFIGURATION OPERATION B-1 CW EA790-10000 EA790-40000 EA790-70000 1 N.O.* B-1 CCW EA790-10001 EA790-40001 EA790-70001 1 N.C. B-2 CW & CCW EA790-10100 EA790-40100 EA790-70100 B-1 CW EA790-20000 EA790-50000 EA790-80000 2 N.O.* B-1 CCW EA790-20001 EA790-50001 EA790-80001 2 N.C. B-2 CW & CCW EA790-20100 EA790-50100 EA790-80100 1 N.O./1 N.C. MAINTAINED** EA790-16000 EA790-46000 EA790-76000 M CAM 2 N.O./2 N.C. EA790-26000 EA790-56000 EA790-86000 1 N.O./1 N.C. MAINTAINED** EA790-16700 EA790-46700 EA790-76700 M-7 CAM 2 N.O./2 N.C. EA790-26700 EA790-56700 EA790-86700 SHORT TRAVEL 1 N.O./1 N.C. EA790-10900 EA790-40900 EA790-70900 B-9 CAM 2 N.O./2 N.C. EA790-20900 EA790-50900 EA790-80900 CW & CCW 2 N.O. NEUTRAL EA790-15700 EA790-54700 EA790-75700 N-1 CAM 4 N.O. EA790-25102 EA790-55102 EA790-85102 2 N.C. NEUTRAL EA790-15800 EA790-45800 EA790-75800 N-1 CAM 4 N.C. EA790-25104 EA790-55104 EA790-85104 *During High Shock: N.C. contacts opened for more than 20 ms. N.O. contacts did not close. **Contacts may transfer during High Shock. 58 www.namcocontrols.com SpECial fUNCTiON SwiTCHES rOCKEr TYpE SwiTCHES Cam OpEraTEd NavY/mariNE limiT SwiTCHES Ea780/790 1-800-nAMtEcH SpECial fUNCTiON SwiTCHES ® SNap-lOCK Ea780/790 CW operational data C C b1 cAM C b2 cAM C A A A A B D D B D B D B A. Trip Travel........................................................ 18˚ A. Trip Travel........................................................ 18˚ B. Reset Travel......................................................14˚ B. Reset Travel......................................................14˚ C. Recommended Travel.......................................30˚ C. Recommended Travel.......................................30˚ D. Maximum Travel Available................................90˚ D. Maximum Travel Available................................90˚ Torque (Inch Lbs.) 1 N.O. - 1 N.C. .............15 Torque (Inch Lbs.) 1 N.O. - 1 N.C. .............15 2 N.O. - 2 N.C. .............27 2 N.O. - 2 N.C. .............27 C A C Short travel b9 cAM neutral n-1 cAM B B A D D C C A A B D D B Direction of Rotation CW CCW A. Trip Travel..................................... 18˚ 31˚ B. Reset Travel.................................. 14˚ 22˚ C. Recommended Travel................... 30˚ 45˚ A. Trip Travel........................................................ 13˚ D. Total Travel................................... 90˚ 90˚ B. Reset Travel......................................................10˚ Torque (inch Lbs.) C. Recommended Travel.......................................30˚ N1 CAM 2 N.O. CW 15 D. Maximum Travel Available................................90˚ 2 N.O. CCW 19.5 Torque (Inch Lbs.) 1 N.O. - 1 N.C. .............15 4 N.O. CW 16.5 4 N.O. CCW 16.5 2 N.O. - 2 N.C. .............27 N1 CAM 2 N.C. CW 15 2 N.C. CCW 15 4 N.C CW 16.5 4 N.C. CCW 16.5 Maintained M-cAM Maintained M7-cAM POSITION 2 POSITION 1 POSITION 2 POSITION 1 CCW CW CCW CW Initial Initial Initial Initial Position Position Position Position D F F C C A A C D D D C B B B A B A E E E E E E Position 1(CCW) 2(CW) Position 1(CCW) 2(CW) A. Trip Travel .............................. 16˚ 30˚ A. Trip Travel .............................. 25˚ 55˚ B. Reset Travel ........................... 30˚ 26˚ B. Reset Travel ........................... 25˚ 22˚ C. Min. Travel to Maintain .......... 26˚ 30˚ C. Min. Travel to Maintain .......... 54˚ 55˚ D. Recommended Travel ............ 45˚ 45˚ D. Recommended Travel ............ 60˚ 60˚ E. 90˚ 90˚ Maximum Travel Available...... E. Maximum Travel Available...... 124˚ 116˚ Torque (inch Lbs.) F. Overall Travel ......................... 56˚ 64˚ M7 CAM 1 N.O. CW 12 Torque (inch Lbs.) 1 N.C. CCW 13.5 M CAM 1 N.O. CW 6 2 N.O. CW 15 1 N.C. CCW 9 2 N.C. CCW 16.5 To change Switch Operation from Cam Position 1 to Position 2, 2 N.O. CW 6 2 N.C. CCW 9 Operate Switch thru Angle C. Remove Lever and Reset at To change Switch Operation from Cam Position 1 to Position 2, Initial Position. Operate Switch thru Angle C. Remove Lever and Reset at Initial Position. typical cams b1 Single Action b2 double Action combination b1/b2 cAM The following three operating sequences are built 0 18 0 18 18 into the combination cam used in the standard EA780/EA790 switches: B1 Single Action CW, B1 Single Action CCW and B2 Double Action CW & CCW. 1. The contacts function when the lever is operated clockwise. The lever can be operated counterclockwise but the contacts will not operate. Normally open to make (normally closed to Normally open to make (normally closed to 2. The contacts function when the lever is operated break) IN ONE DIRECTION ONLY. Lever and break) IN EITHER DIRECTION. Lever and counterclockwise. The lever can be operated cam are spring returned to staring position. cam are spring returned to starting position. clockwise but the contacts will not operate. Used on Single Action Switches only. 3. The contacts function when the lever is operated clockwise or counterclockwise. 59 CCW