QO and QOU Miniature Circuit Breakers QOU Miniature Circuit Breakers

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1 QO and Miniature ircuit reakers Miniature ircuit reakers lass 720 / Refer to atalog 0730T9801 Low mpere Miniature ircuit reakers unit mount miniature circuit breakers (cable-in/cable-out) are ideal for OM applications. They have the Square circuit breaker s unique Visi-Trip feature and can be IN rail-mounted or surface- or flush-mounted using mounting feet. Low mpere eneral Specifications ommon to ll Low mpere ircuit reakers For convenient flush mount, surface mount or IN mount S/UL Listed 48 Vdc (5 k IR) (symmetrical rail 35 x 7.5 IN/N ) S/UL Listed as HR Type: Single handle with internal common trip High magnetic trip circuit breakers (-HM) are recommended Terminal lug wire size (1) 14 2 W u or l for applications where high initial inrush may occur and for Reversible line and load lugs individual dimmer applications. Field-installable quick connectors IRUIT RKRS 3 Low mpere Miniature ircuit reakers mpere 1P 120/240 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac at. No. at. No. at. No.a at. No. 10 k IR H H H H k IR VH 215VH 315VH VH 220VH 320VH VH 225VH 325VH VH 230VH 330VH VH 235VH VH 240VH VH 245VH VH 250VH VH 260VH a -H interrupting rating is 10 k at 240 Vac. -HM Miniature ircuit reakers (10 k IR) mpere 1P 120/240 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac at. No. at. No. at. No. at. No HM HM High mpere High mpere ircuit reakers eneral Specifications ommon to ll High mpere ircuit reakers Flush mount, surface mount, and IN rail mount. S/UL Listed as HR type, Internal common trip. Non-automatic switches have the same physical packaging Non-reversible line and load lugs. as miniature circuit breakers, but provide no overcurrent or Terminal lug wire size (1) 12 2/0 W u or l. short circuit protection. They are UL Listed per UL1087 and UL Listed 60 Vdc per pole (5 k IR). (Note: except switches) are S certified. High mpere Miniature ircuit reakers (10 k IR) mpere 1P 120/240 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac at. No. at. No. at. No. at. No Non-utomatic Switches mpere 1P 120 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac at. No. at. No. at. No. at. No Interrupting s Page 3-3 ccessories Page 3-12, 3-15 imensions Page /12

2 imensions and Shipping Weights Miniature and Molded ase ircuit reakers IRUIT RKRS Figure 1 Figure 6 Figure 4 Figure 2 Figure 7 Figure 5 Figure 8 Figure 3, QYU Low mpere QO, QO QO-FI, QO-PL QO-P F QO,, Multi 9 ircuit reakers ircuit reaker atalogue No. Prefix QO, QO QO-VH 150 QO-VH QO-PL QO-FI QO-P Low mpere High mpere Multi 9 60 a b c d e f No. Poles Fig. No. imensionsinches F a a a b b b c p c p d f is 3.12 in; pole and pole are 3.50 in. QO-PL is 4.55 in pole and pole are 4.45 in in pole and pole are 6.78 in is 6.78 in. 3 Figure 9 Figure 10 Figure 11 Figure 10 Figure 13 Figure 14 Figure 11 Figure 15 Figure 12 Figure 16 High mpere F 60 Q, Q, Q, QJ, Q4, F, FI, KI, L, LH ircuit reakers ircuit reaker atalogue No. No. Prefix Poles Fig. imensionsinches No. F H Q, Q, g Q, QJ g FL, FHL FIL, KIL 2 & Q4L, LL, LHL 2 & g imensions are 1.59 in at ON end and 0.63 in at OFF end. Shipping Weightsh Frame Size pprox. Shipping Weight (Lbs.) Frame Size pprox. Shipping Weight (Lbs.) Figure 17 Figure 18 Figure 19 Figure 20 FL, FHL 1P 2 KIL 9 FL, FHL 2P 3 LL, LHL 15 FL, FHL 3P 5 LIL LXIL 25 FIL 8 Q4L 15 Q, Q, Q, QJ 4 h ll weights are for 3P circuit breakers unless otherwise noted. Figure 21 F Figure 22 /L F Figure 23 HH /L F Figure 24 F /12

3 Miniature ircuit reakers and Switches pplication Information Table 1: Selection ata Tripping Mechanisms atalog Number One-Pole Two-Pole Three-Pole 120/240 Vac 120/240 Vac 240 Vac 120/240 Vac 240 Vac 10K IR 22K IR 10 K IR 22K IR 10K IR * 115HM* 120* 120HM* 125* 130* 135* 140* 145* 150* 160* 115VH 120VH 125VH 130VH 135VH 140VH 145VH 150VH 160VH * Switch60 mperes Max.240 Vac Switch100 mperes Max.240 Vac Switch125 mperes Max.240 Vac * 220* 225* 230* 235* 240* 245* 250* 260* 270* Terminal Lug Wire Size (W) 215H* 220H* 225H* 230H* 215VH 220VH 225VH 230VH 235VH 240VH 245VH 250VH 260VH * 320* 325* 330* 335* 340* 345* 350* 360* 1#14 #2 u or l #12 #2/ u or l #14 # #12 #2/0 * UL Listed as HR type for use with heating, air conditioning and refrigeration equipment containing motor-group combinations and marked for use with HR type circuit breakers. High-magnetic trip circuit breakers. Recommended for applications where high initial inrush current can occur and for individual dimmer applications. vailable as Series 1 with forward box lugs only. (No optional terminations) 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 circuit breaker. These mechanisms operate to trip the circuit breaker: Thermal trip Magnetic trip Optional shunt trip accessory (see ccessories, 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. 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. 09/ Schneider lectric ll Rights Reserved 3 ourtesy of Steven ngineering, Inc. 230 Ryan Way, South San Francisco, eneral Inquiries: (800)

4 Miniature ircuit reakers and Switches pplication Information Line and Load onnections miniature circuit breakers are supplied with two types of lug configuration as standard, depending on the continuous current rating: ampere one- and two-pole; reversible lugs ampere three-pole; reversible lugs Other ampere ratings; forward lugs only The box-type lugs supplied on miniature circuit breakers are UL Listed and S certified to accept solid or stranded, aluminum or copper conductors These lugs are UL Listed to be used with wire rated at 140 F, 167 F and 194 F (60, 75 and 90 ), sized according to the N 176 F (75 ) temperature rating. See the ccessories section for more information on terminations. Optional terminations, such as quick connectors, are also available. See the ccessories section for more information on terminations. Ring-tongue terminals can be factory ordered using the following catalog number designations: _3100 (ring-tongue terminal wired from front) R _5283 (ring-tongue terminal wired from rear) Mounting Provisions miniature circuit breakers are supplied with mounting brackets for both line and load side support. Mounting brackets are field installable and can be attached to the front or back of the circuit breaker molded case. See the ccessories section for more information on mounting brackets. Tapped mounting feet can be ordered using the catalog number designation _3100. ll miniature circuit breakers also come equipped with slots in the molded case for IN rail mounting. These miniature circuit breakers are designed for use with a standard 35 mm IN mounting rail (IN/U , 0.30 x 1.38 in. [7.5 mm x 35 mm]). Standards Square brand miniature circuit breakers are manufactured and tested according to the following standards: UL Standard 489 (File 84967) NM Standard 1 anadian Standards ssociation S 22.2 No I Square brand non-automatic switches comply with: UL Standard 489 anadian Standards ssociation S 22.2 No NOT: ircuit breakers are to be applied by guidelines detailed in the N and other applicable electrical codes. 09/ Schneider lectric ll Rights Reserved 5 ourtesy of Steven ngineering, Inc. 230 Ryan Way, South San Francisco, eneral Inquiries: (800)

5 Miniature ircuit reakers and Switches pplication Information atalog Numbers Square brand circuit breakers are ordered by a catalog number that includes the circuit breaker family, description, number of poles, amperage rating and suffix. Table 2: atalog Numbers Typical atalog Number: QO U 2 30 H 2100 QO Miniature ircuit reaker Family escription U Unit Mounted (Lugs on oth nds) No. of Poles 1 1-pole 2 2-pole 3 3-pole mpere mpere 00 = 60, 000 = 100, and Switch 1- and 2-pole 2-pole 3-pole No Letter-Standard 120/240 Vac VH - 22,000 IR No Letter Vac VH - 22,000 IR H-240 Vac VH - 22,000 IR Suffix XXX (i.e., 2100) - Indicates Factory-installed ccessory (See page 12) s for Miniature ircuit reakers When designing an electrical distribution system, overcurrent protective devices are generally selected based on performance requirements. Factors influencing this selection include system voltage, continuous current, interrupting rating and frequency. circuit breakers are selected by their ratings. circuit breaker s rating must meet or exceed the parameters of the electrical system on which they are used. Voltage circuit breaker can be rated for alternating current (ac) or direct current (dc) or both. The established voltage rating of a circuit breaker is based on design parameters such as clearance of current carrying parts and dielectric withstand tests both through air and over surfaces. Voltage ratings indicate the maximum voltage for the electrical system on which the circuit breaker can be applied. The circuit breaker must have a voltage rating greater than or equal to the system voltage. When a circuit breaker clears an overcurrent, it does so in two steps: First, the current sensing system identifies the overcurrent and releases the tripping mechanism. This results in a parting of the contacts. Then the circuit breaker must extinguish the voltage arc across the contacts. If the circuit breaker has the correct voltage rating, it can efficiently extinguish this voltage arc. miniature circuit breakers are rated in the following UL 489 voltages, as shown in Table 3: 120/240 Vac 240 Vac 48 Vdc 60 Vdc 277 Vac for QYU, UL 1077 recognized supplementary protector only (not a branch circuit breaker) Schneider lectric ll Rights Reserved 09/2005 ourtesy of Steven ngineering, Inc. 230 Ryan Way, South San Francisco, eneral Inquiries: (800)

6 Miniature ircuit reakers and Switches pplication Information Interrupting The interrupting rating of a circuit breaker is the highest current at rated voltage that the circuit breaker is intended to interrupt under standard test conditions. ircuit breakers must be chosen with interrupting ratings equal to or greater than the maximum available short-circuit current at the point where the circuit breaker is applied in the system (See Table 3). Table 3: Interrupting 1 ircuit reaker Type ontinuous urrent The continuous current rating of a circuit breaker is defined by the National lectrical Manufacturers ssociation (NM) as: The maximum direct current or rms current, in amperes, at rated frequency which a device or assembly will carry continuously without exceeding the specified limits of observable temperature rise. Sometimes referred to as the ampere rating or handle rating of the circuit breaker, the continuous current rating relates to the system current flow under normal conditions. UL Standard 489 states that circuit breakers must carry 100% of their continuous current rating indefinitely (without tripping) at 104 F (40 ) in free air. circuit breakers should be applied, per the N, to carry 80% of their continuous current ratings in the intended enclosure. The continuous current rating is indicated on the handle of each circuit breaker. See Table 1. Switching uty No. of Poles mpere ratings do not apply to circuit breakers rated for 10 UL Listed Interrupting RMS Sym. mperes Volts Volts 1 120/ N N 5 k k N N 5 k N k N N N 5 k k N N 5 k N k N N N 5 k N 10 k N 5 k N N 10 k N N 5 k -H N 10 k N 5 k N -VH k N N 5 k N N = Not pplicable The switching duty (SW) listing applies only to 15 and 20 circuit breakers rated at 277 Vac or less. The circuit breakers are subjected to specified temperature rise tests at predetermined periods during the endurance operations. 09/ Schneider lectric ll Rights Reserved 7 ourtesy of Steven ngineering, Inc. 230 Ryan Way, South San Francisco, eneral Inquiries: (800)

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