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QOU220VH Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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3 / 32 page QOU Miniature Circuit Breakers and Switches Application Information 3 09/2005 © 2005 Schneider Electric All Rights Reserved Tripping Mechanisms A tripping mechanism is an assembly within the circuit breaker molded case that causes the circuit breaker to open automatically under sustained overload or short circuit conditions. The tripping mechanisms in two- and three-pole circuit breakers operate such that an overcurrent on any pole of the circuit breaker will cause all poles of the circuit breaker to open simultaneously. Thermal and magnetic factory calibration (with current) is performed on each pole of every Square D circuit breaker. These mechanisms operate to trip the circuit breaker: • Thermal trip • Magnetic trip • Optional shunt trip accessory (see Accessories, page 12) The sensing system is an integral part of a thermal-magnetic circuit breaker. The sensing system continually monitors current flowing through the circuit breaker. It detects abnormal current conditions and, depending on the magnitude of the current, initiates an inverse-time or an instantaneous tripping response. This action causes the tripping mechanism to open the circuit breaker contacts and interrupt current flow. The speed of the tripping process must be controllable and inversely matched to the severity of the overcurrent. QOU miniature circuit breakers have an over-center toggle mechanism for quick-make, quick-break action with positive handle indication. The handle assumes a position between ON (I) and OFF (O) when the circuit breaker has tripped. Table 1: Selection Data Catalog Number Rating One-Pole Two-Pole Three-Pole Terminal Lug Wire Size (AWG) 120/240 Vac 120/240 Vac 240 Vac 120/240 Vac 240 Vac 10K AIR 22K AIR 10 K AIR 22K AIR 10K AIR 10 A 15 A 15 A 20A 20 A 25 A 30 A 35 A 40 A 45 A 50 A 60 A QOU110 QOU115* QOU115HM*† QOU120* QOU120HM*† QOU125* QOU130* QOU135* QOU140* QOU145* QOU150* QOU160* — QOU115VH — QOU120VH — QOU125VH QOU130VH QOU135VH QOU140VH QOU145VH QOU150VH QOU160VH QOU210 QOU215* — QOU220* — QOU225* QOU230* QOU235* QOU240* QOU245* QOU250* QOU260* — QOU215H* — QOU220H* — QOU225H* QOU230H* — — — — — QOU215VH QOU220VH QOU225VH QOU230VH QOU235VH QOU240VH QOU245VH QOU250VH QOU260VH QOU310 QOU315* — QOU320* — QOU325* QOU330* QOU335* QOU340* QOU345* QOU350* QOU360* 1—#14–#2 Cu or Al 70 A 80 A 90 A 100 A 125 A QOU170* QOU180‡ QOU190‡ QOU1100‡ — — — — — — QOU270* QOU280‡ QOU290‡ QOU2100‡ QOU2125‡ — — — — — — — — — — QOU370‡ QOU380‡ QOU390‡ QOU3100‡ — 1—#12–#2/0 Cu or Al Switch—60 Amperes Max.—240 Vac Switch—100 Amperes Max.—240 Vac Switch—125 Amperes Max.—240 Vac QOU200 QOU300 1—#14–#2 QOU2000‡ QOU20001‡ QOU3000‡ QOU30001‡ 1—#12–#2/0 * UL Listed as HACR type for use with heating, air conditioning and refrigeration equipment containing motor-group combinations and marked for use with HACR type circuit breakers. † High-magnetic trip circuit breakers. Recommended for applications where high initial inrush current can occur and for individual dimmer applications. ‡ Available as Series 1 with forward box lugs only. (No optional terminations) |
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