Replacement Parts I Overload Relays Bimetal Class 16 Third Fourth Character Character of Cat No of Cat No Number of Poles Cat No Price 1 48DC17A $66 E N 3 48DC37A 69 1 48DC17AA6 66 B E 3 48DC37AA6 69 1 48EC17AA6 90 c E 3 48EC37AA6 93 1 48GC17AA6 99 E D,E 3 48GC37AA6 102 1 E 48HC17A 60 F'G Requires 3 for 3 Ph H F 3 48HC37AA2 174 I F 3 48IC37AA6 180 Left 48JA17AA2L 99 J B Center 48JA17AA2R 99 Right 48JA17AA3R 117 R, K F 3 48DC37A4 63 1 Current Transformer per pole required 48KBIT 213 M F 3 48DC37A4 63 1 Current Transformer per pole required 48MBIT 213 Ambient Compensated Bimetal Class 16 Third Fourth Character Character of Cat No of Cat No Number of Poles Cat No Price 1 $78 48DC18A N E 3 48DC38A 81 1 48DC18AA6 78 B E 3 48DC38AA6 81 1 48EC18AA6 102 E c 3 48EC38AA6 105 1 48GC18AA6 111 D,E E 3 48GC38AA6 114 1 E 48HC18A 75 R G Requires 3 for 3 Ph t H F 3 48HC38AA2 192 I F 3 48IC38AA6 198 Left 48JA18AA2L 114 J B Center 48JA18AA2R 114 Right 48JA18AA3R 138 R, K F 3 48DC38A4 75 1 Current Transformer per pole required 48KBIT 213 M F 3 48DC38A4 63 1 Current Transformer per pole required 48MBIT 213 Discount Schedule D Furnas 41 Definite Purpose Starters 160 FLA 60 Hz 600VAC Max DEFINITE PURPOSE I For Centurion 2000 Starters Thru 650 FLA see page 11. STARTERS magnet prevents residual • Weld Resistant Contacts APPLICATION magnetism from interfering • Dependable Overload Relays with normal contact drop Furnas Electric Class 16 out. definite purpose magnetic • Non Tracking Arc Box starters are designed for the Molded Arc Box (Contact • Compact control of air conditioning, Block)- Molded from • Straight Thru Wiring heating and refrigeration rugged thermosetting mate- equipment. They provide rials, Class 16 arc boxes dependable, full voltage con- resist arc tracking and the trol for compressors, grain stresses of heat and severe driers, conveyors and cus- impact. Sizes 50-60A use a tom pump motors. These two piece enclosed arc box. controls are available in 5 sizes from 25-60 FLA at Silver Cadmium Oxide 240V, 480V and 600V. Contacts- Furnas definite purpose starters are equipped with silver CONSTRUCTION cadmium oxide contacts, a Class 16 definite purpose material having high conduc- magnetic starters incorpo- tivity and superior resistance rate the following construc- to welding and arc erosion. tion features. These contacts are the dou- ble break type with large Common Mounting- 25- surface areas to minimize 60A definite purpose starters electrical resistance and 25A share common mounting attendant heat. configurations and dimen- sions. Dependable Thermal Overload Relays- Furnas Straight Thru Wiring- overload relays are Line terminals are located at designed to protect motors the top, load terminals at the from excessive current and bottom. This construction resultant damage. eliminates looping wires Mechanical overloading, sin- around the control and gle phasing, stalled rotor reduces wiring costs. and low voltage are some of the causes of excessive cur- Magnet- Laminated layers rent. Proper selection of of silicon steel are riveted to heater elements for the form a durable magnet. The overload relay will prolong horizontal type armatures motor life and help prevent operate with a snap action nuisance trips. Furnas over- and a short stroke that load relays and heater ele- reduce contact bounce and ments are designed to paral- mechanical wear. A shading lel the thermal characteris- coil insures positive sealing tics of typical electric motors. of the armature. An air gap 30A. 40A They trip out on sustained in the central leg of the Coil Data Third Character VA (Nominal) Volts (Nominal) FLA of Cat No Watts Inrush Sealed Pick-up Drop-out N 35 8 25 3.5 85% 50% 30, 40 B, C 2.5 52 6.2 85% 50% D, E 4.0 92 10 85% 58% 50,60 For Centurion 2000 starters thru 650 FLA see page 11. 28 Furnas Definite Purpose Starters 160 FLA 60 Hz 600VAC Max DEFINITE PURPOSE STARTERS overload but not on the high brated and any one of the Dual Voltage/Dual Enclosure- Class 16 starting currents of normal three strips may sense heat Frequency Coils- Dual magnetic starters can be operation. generated by excessive cur- voltage tape wound coils are supplied in a NEMAtype 1 rent flow in the power circuit. available in place of stan- general purpose enclosure. Bimetal overload relays are Bimetal strips deflect when dard single voltage coils on This enclosure protects per- available in temperature an overload occurs, causing 30A, 40A, 50A and 60A sonnel from accidental con- compensated and noncom- a snap action mechanism to starters at additional cost. tact with electrical appara- pensated units. A tempera- operate and break a normal- These coils operate on tus. It meets the needs of ture compensated unit and ly closed circuit. This over- either 50 or 60 Hz and are indoor applications in a nor- selected heater elements load may be manuallytripped rated 120/240V or 240/480V. mal atmosphere free of prevent nuisance tripping to open the contacts. The dual voltage coils con- excessive moisture, dust caused by locating the con- vert from lower to higher or and explosive materials. troller in an ambient temp- higher to lower voltage con- ACCESSORIES erature different than that of nections by simply changing & MODIFICATIONS ORDERING INFORMATION the motor. Both temperature the coil jumpers. Accessories are available, compensated and noncom- either factory installed or in • Heater Elements page 42. pensated units are equipped Auxiliary Electrical field kit form, to make with normally closed control • Modifications page 31. Interlock- Furnas supplies Furnas definite purpose circuit contacts and accept one or two interlocks as a • Dimensions page 32. starters suitable for an even standard or quick trip heater factory modification or for greater variety of applica- elements. A manual-auto- field installation. Available • Replacement Parts tions. matic selector offers choice with either normally open or page 38. of reset mode. normally closed contacts. Coils- 30-60A starters are supplied as standard with a Overload relays feature shrouded coil. This design adjustable trip current points improves corrosion resis- which can be field set within tance and minimizes the ±15% of the rated trip cur- REFERENCE LITERATURE possibility of failure by cont- rent. Single unit overload aminants. The shrouded coil relays are designed with Instruction Sheets and Replacement Parts eliminates the need for adjustable trip especially for Size FLA Instruction Sheet Replacement Parts molded coils in high temper- use on single phase atures or humid applications. 25 PM-60.1 16-GNE starters. Epoxy encapsulated coils 30,40 PM-60.1 16-GBE Tri-element block overload are also available as an 16-GDE 50,60 PM-60.1 relays for 3 phase feature option on 30-60A devices at three overloads in a com- an additional charge. mon housing. The bimetal strips are independently cali- Tri element block overloads Single unit overloads are are used on 3 phase. used on single phase. Furnas 29