Emerson ASCO 920 Lighting Contactors for Feeder Circuits Brochures and Data Sheets
Contents
1. management systems Polycarbonate dust cover for protection against industrial environment Barrier screw type terminals UL recognized for use with with approved means for ASCO RC switches solderless connection of Permits low voltage AC or conductors DC normal Low VA burden Narrow width design Incorporates ASCO 115 relays Two Wire Control Accessory 47 Catalog No 321A40 ASCO relay for two wire control Standard Control Voltages 24 120 208 240 277VAC 50 or 60Hz 24 or 110VDC Accessory 47 Three Wire Control Accessory 48 Catalog No 321A36 ASCO relay for three wire control Standard Control Voltages 24 120 208 240 277VAC 50 or 60Hz 12 24 32 48 Accessory 48 or 110VDC Auxiliary Control Relays to Operate RC Switches are useful when When the controlling device does not have adequate current carrying capacity to directly control the RC switch When the control station is to be located ata distance greater than the allowable RC switch line run When the controlling device is only available as a single pole single throw contact necessitating a two wire control line e When Form 3 start stop control for an RC switch is required Two wire relay control of aremote control switch Three wire relay control of aremote control switch CONTROL RELAY Dimensions inches mm for ASCO two wire and three wire Control Relays Height Dep2. 80 volts for use with molded case circuit breakers 100 000 Amps rms symmetrical at 600 volts for use with current limiting fuses Control line terminal clamps simplify installation Insert wire and tighten Wire range 14 AWG to 10 AWG Contacts are power driven in both directions for complete dependability be used with metal ha Construction Features lide mercury vapor quartz halogen tungsten and fluorescent lighting e Long life Designed for more demanding lighting contactor use Provides extended life and quieter operation No derating when used on high inrush loads such as cold tungsten lamps Suitable for use with energy Wide arc gaps and arc split management systems ters to quickly extinguish arcs Isolated arcing cham bers are widely spaced and symmetrically located No extra wires or contacts needed to install signal lamps at control stations Rugged molded base cover with superior electri cal insulation Provisions for manual Can be mounted in any Interrupts 300 of rated current at 480 volts 0 4 to 0 5 power factor operation during inspection and maintenance Lightweight for easy installation Plug in auxiliary control relays available position Available from stock from 30 225 Amps ASCO 920 Optional Auxiliary Control Relays Features Allows control of RC switches directly from energy
3. ASCO 920 Remote Control RC Switches b ain im gal ba ee SS eo iii HNN iI bh wmi p af N EMERSON Network Power ASCO 920 Remote Control RC Switches The ASCO 920 is designed as a feeder disconnect switch for load capacities beyond the ASCO 917 ASCO 920 RC switches are available for separate mounting in NEMA type enclosures or direct mounting within lighting panelboards for total or split bus applications It is available from 30 through 225 Amperes per pole with 2 or 3 poles and service voltages through 600 volts AC The ASCO 920 is listed under UL 508 for ballast lighting tungsten general use and resistive loads It also meets the withstand current requirements of UL 67 for panelboard applications The ASCO 920 is easy to install and features all posi tion mounting no derating for high inrush loads and reliable single solenoid operator ASCO 920 RC switches can be used with energy management systems which automatically control lighting and power circuits through control devices such as photoelectric cells microprocessors timers and occupancy sensors ASCO 920 Remote Control Switch in Type 1 Enclosure ASCO 920 Features Electrical Features UL listed CSA Approved e Meets UL 67 requirements with short circuit rating Withstand Current Rating of 22 000 Amps rms sym metrical at 4
4. cted 2 poles to load 250 VAC S00 VAC Inrush Current Values and Minimum Recommended Control Circuit Fuse Size 67 6 Overcurrent protective device ratings for control circuits should be selected and installed in accordance with the NEC 7 This table shows the minimum permissible control circuit fuse size based on the operating coil s momentary inrush current 8 ASCO furnished control fuses are rated at 15 Amps Wire Size for Service and Maximum Distance Between Control Station and One ASCO Control Connections 2 10 920 RC Switch with Source Line Voltage at 90 of Normal 14 8 30 100 150 225 9 Control circuit connections are supplied with terminals 11 If the control device does not have adequate current carrying capacity to control the accommodate a copper wire range of 14 AWG to 10 AWG switch directly or the control station is to be located a greater distance from the 10 Service connection for switches on sub panels are switch than is allowed in the above table auxiliary control relays for 2 wire or 3 wire furnished with solderless lugs to accommodate copper or control are available See optional accessories on inside tab aluminum wire except on 30 Amp size which is provided 12 For 208 volt system reduce 240 volt values by 15 60 75 14 1 0 with 1 4 studs 13 For 265 volt system reduce 277 volt values by 5 ASCO 920 Ordering Information Continuous Ampere Product Rating Sub Panel Op
5. ontrol voltage to 300V 52B For ungrounded control voltage to 300V For ungrounded control voltage 301 600V 52C 1 A maximum of one pair of optional 14A and 14B contacts can be supplied on the above indicated remote control switches 2 The Amperage of the neutral plate will be equal to the Amperage of the specified remote control switch Lugs capable of accommodating the same cables as a single main pole are provided 3 When ordering specify desired control voltage See next page for control voltages 4 Control line fuses can be used to supply power from the remote control switch enclosures to external control stations Any incoming service or control power should have appropriate overcurrent protection at their source as required by application codes For a grounded control voltage one fuse should be ordered for an ungrounded control voltage two fuses should be ordered Shipped loose for open types Installed for enclosed types 6 U L recognized Ul ASCO 920 Remote Control Switch with sub panel Emerson Network Power Global Headquarters 1050 Dearborn Drive Columbus OH 43085 Tel 1 614 888 0246 ASCO Power Technologies Global Headquarters 50 Hanover Road Florham Park 07932 800 800 ASCO www EmersonNetworkPower com ASCO Www ascoapu com Emerson Consider it Solved Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co 2013 Emerson Elect
6. ric Co All rights reserved Publication 3206 R3 September 2013 Printed in the U S A EMERSON CONSIDER IT SOLVED
7. th Width 165 mm 51 mm 86 mm 1 Dimensional data is approximate and subject to change Certified dimensions available upon request Operating Coil Characteristics Rating Accessory 47 Accessory 48 Nominal AC 3 0 VA 2 0 VA Pickup Voltage AC 185 of Nominal 185 of Nominal Nominal DC Pickup Voltage DC 80 of Nominal 75 of Nominal 120 of Nominal Maximum Voltage 120 of Nominal ASCO 920 Product Specifications Switch Only Panelboard Mounting 123 1 Suitable insulation must be behind switch unit 2 Suitable for bus bar mounting Lugs not supplied 3 Dimensional data is approximate and subject to change Certified dimensions available upon request Switch With Sub Panel Panelboard Mounting 8 3 6 13630 30 100 7 15 16 201 11 3 4 298 3 7 8 98 8 3 6 13 330 18 1 4 464 4 1 2 114 23 10 4 150 225 7 15 16 201 14 1 2 368 3 15 16 100 11 5 0 13 330 24 610 4 1 2 114 31 14 0 4 Enclosure gutter spaces are based non looping of cables within the enclosure Where cables must looped within the enclosure oversize cabinets are available at extra cost Contact ASCO for complete information Maximum Voltage Ratings at Rated Amps Open Enclosed 5 5 For DC service maximum current rating is 75 amps or switch rating whichever is less with maximum voltage rating of 125 volts when connected 1 pole to load and 250 volts when Ballast Ballast 480 VAC conne
8. tions Enclosures Code of Poles AC DC 1 AC Voltage 2 Code 110 to 120V 3 Leave Blank Leave Blank for 208 to 240V Sub Panel for No Open Type 265 277V Options Indicates 440 to 480V 1 Sub Panel 2C Indicates NEMA Type1 Oth Options List or Separately Specify Other Voltages Up to 480 See Below Type Required 1 For DC service maximum current rating is 75 Amps or switch rating whichever is less with maximum voltage rating of 125 volts when connected 1 pole to load and 250 volts when connected 2 poles to the load 2 All at 50 or 60 Hz For voltages other than those listed and for DC applications contact your nearest ASCO source 3 Specified only when ASCO 920 is to be mounted within a panelboard A sub panel is required when mounting in NEMA type enclosures Example The catalog number for an ASCO 920 3 pole 225 amp switch with a control coil voltage of 277 volts 60 Hz with an Optional Accessory 48 and a sub panel ina NEMA Type 1 enclosure is 920322571XC with option 48A 120V Optional Accessories Option Description See Notes Specify Option Auxiliary contacts one normally open and one normally 14A and 14B closed Supplied as a pair Rated 10 amps at 480 VAC Fully rated neutral plate Auxiliary control relay for 2 wire control 2 Auxiliary control relay for 3 wire control Auxiliary control relay for Form 3 control 47 48 49 Control line fuse 4 52A For grounded c
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