QO™ and QOU Miniature Circuit Breakers · 2014-09-12 · DE3-12 DE3 CIRCUIT BREAKERS 06/12 QO™...

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DE3 CIRCUIT BREAKERS 06/12 DE3-12 QO™ and QOU Miniature Circuit Breakers QO™ Circuit Breaker Accessories Factory-Installed Accessories for Use with QO and QOB Miniature Circuit Breakers Factory-installed electrical accessories take up an additional pole space on QO™, QO-GFI, QO-EPD, QO-SWN and QOU circuit breakers. All AC electrical accessories shown below are rated for 50/60 Hz. Accessories are not available for QOB-VH (2P 150 A and 3P 110–150 A) circuit breakers or QO, QOU molded case switches. QO circuit breakers will accept only one accessory per circuit breaker. Undervoltage trip is not available on miniature circuit breakers. Factory- installed accessories are not available for QO-AFI or QO-CAFI Arc Fault Circuit Breakers or on QO2150, QO2175, or QO2200 circuit breakers. Accessories for Use with QO™ and QOB Miniature Circuit Breakers Handle Attachments Description Cat. No. $ Price Handle Tie: Converts any two adjacent 120/240 Vac 1P QO circuit breakers to independent trip 2P QO1HT Converts any two adjacent 120/240 Vac 1P side-by-side QOT circuit breakers to independent trip 2P QOTHT Handle tie and lock-off for three 1P QO, QOB circuit breakers QO3HT Handle Clamp: Clamp for holding QO 1P handle in ON or OFF position QO1LO Clamp for holding QO or Q1 1P, 2P or 3P circuit breaker handles in ON or OFF position HLO1 Handle Padlock Attachment: for Padlocking in ON or OFF position For padlocking 1P QO circuit breaker in ON or OFF position Loose attachment QOHPL Fixed attachment QO1PA For padlocking 1P side-by-side QOT circuit breaker in ON or OFF position QOTHPA For padlocking 2P and 3P QO-GFI, QO-EPD, and QO-EPE in either ON or OFF position, fixed attachment. GFI2PA For 2P and 3P QO and Q1 standard circuit breakers which require padlocking in either ON or OFF position. Loose attachment QO1HPL Fixed attachment QO1PL Handle Padlock Attachment: for Padlocking in OFF position For padlocking 1P QO circuit breaker in OFF position only, fixed attachment. QO1PAF For padlocking 2P and 3P QO circuit breakers in OFF position only, fixed attachment. QO2PAF For padlocking 1P QO-GFI, QO-AFI, QO-CAFI, and QO-EPD circuit breakers in OFF position only, fixed attachment. QOGFI1PAF For padlocking 2P and 3P QO-GFI, QO-EPD, and QO-EPE circuit breakers in OFF position only, fixed attachment. QOGFI2PAF Sub-Feed Lugs 60 A 2P plug-on – 2 spaces required (6–2 Al/Cu) QO60SL 125 A 2P plug-on – 2 spaces required (12–2/0 Al/Cu) QO2125SL 225 A 2P plug-on – 4 spaces required (4–300 Al/Cu) QO2225SLa 125 A 3P plug-on – 3 spaces required (12–2/0 Al/Cu) QO3125SL Mechanical Interlock Attachment For interlocking the handles of two 2P or one 2P and one 1P QO and Q1 circuit breakers mounted side-by-side so that only one circuit breaker can be ON at a time (Not QOU) QO2DTI With Retaining Kit: QO2DTI mechanical interlock attachment with retaining kits for securing two adjacent back-fed circuit breakers in dual power supply applications. Can be used with (2) 2Ps or (1) 2P and (1) 1P QO circuit breakers in QO816L100 load centers. QO2DTIM a Not suitable for use in 3Ø panels. Use only in 1Ø panel rated 150 A or greater. QOHPL QO1PA QO1PL QO2DTI QO1HT QO1HPL HLO1 QO1LO QOTHPA QO2PAF QO1PAF QOGFI2PAF Factory-Installed Accessories Accessory Description Rated Voltage Coil Burden Cat. No. Suffix $ Price Adder Accessory Description Contact Comb. Max. Voltage Max. Load Cat. No. Suffix $ Price Adder Shunt Trip Trips the circuit breaker from a remote location by means of a trip coil energized from a separate circuit. A 120 Vac shunt trip will operate at 55% or more of rated voltage. All other shunt trips will operate at 75% or more of rated voltage. Application For use with momentary or maintained push button. Not available on QO-GFI, QO-EPD, QO-AFI, QOCAFI. Shunt trip terminals accept (2) 14–12 AWG Cu. AC/DC 12 60 VA -1042 Auxiliary Switches Monitors circuit breaker contact status and provides a remote signal indicating the circuit breaker contacts are OPEN or CLOSED. Application Auxiliary switch terminals accept (2) 14–12 AWG Cu leads. 1A 1B AC 120 AC 120 5 A 5 A -1200 -1201 24 168 VA AC 120 72 VA -1021 208 228 VA 240 288 VA Alarm Switches Used with control circuits and is actuated only when the circuit breaker has tripped. Standard construction includes a normally- open contact. Application Alarm switch terminals accept (2) 14–12 AWG Cu leads. 1A AC 120 5 A -2100 Class 1130 / Refer to Catalog 0730CT9801

Transcript of QO™ and QOU Miniature Circuit Breakers · 2014-09-12 · DE3-12 DE3 CIRCUIT BREAKERS 06/12 QO™...

Page 1: QO™ and QOU Miniature Circuit Breakers · 2014-09-12 · DE3-12 DE3 CIRCUIT BREAKERS 06/12 QO™ and QOU Miniature Circuit Breakers QO™ Circuit Breaker Accessories Factory-Installed

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06/12DE3-12

QO™ and QOU Miniature Circuit BreakersQO™ Circuit Breaker Accessories

Factory-Installed Accessories for Use with QO and QOB Miniature Circuit BreakersFactory-installed electrical accessories take up an additional pole space on QO™, QO-GFI, QO-EPD, QO-SWN and QOU circuit breakers. All AC electrical accessories shown below are rated for 50/60 Hz. Accessories are not available for QOB-VH (2P 150 A and 3P 110–150 A) circuit breakers or QO, QOU molded case switches. QO circuit breakers will accept only one accessory per circuit breaker. Undervoltage trip is not available on miniature circuit breakers. Factory-installed accessories are not available for QO-AFI or QO-CAFI Arc Fault Circuit Breakers or on QO2150, QO2175, or QO2200 circuit breakers.

Accessories for Use with QO™ and QOB Miniature Circuit BreakersHandle Attachments Description Cat. No. $ Price

Handle Tie: Converts any two adjacent 120/240 Vac 1P QO circuit breakers to independent trip 2P QO1HTConverts any two adjacent 120/240 Vac 1P side-by-side QOT circuit breakers to independent trip 2P QOTHTHandle tie and lock-off for three 1P QO, QOB circuit breakers QO3HT

Handle Clamp:Clamp for holding QO 1P handle in ON or OFF position QO1LOClamp for holding QO or Q1 1P, 2P or 3P circuit breaker handles in ON or OFF position HLO1

Handle Padlock Attachment: for Padlocking in ON or OFF position

For padlocking 1P QO circuit breaker in ON or OFF position Loose attachment QOHPLFixed attachment QO1PA

For padlocking 1P side-by-side QOT circuit breaker in ON or OFF position QOTHPAFor padlocking 2P and 3P QO-GFI, QO-EPD, and QO-EPE in either ON or OFF position, fixed attachment. GFI2PAFor 2P and 3P QO and Q1 standard circuit breakers which require padlocking in either ON or OFF position.

Loose attachment QO1HPLFixed attachment QO1PL

Handle Padlock Attachment: for Padlocking in OFF position

For padlocking 1P QO circuit breaker in OFF position only, fixed attachment. QO1PAFFor padlocking 2P and 3P QO circuit breakers in OFF position only, fixed attachment. QO2PAFFor padlocking 1P QO-GFI, QO-AFI, QO-CAFI, and QO-EPD circuit breakers in OFF position only, fixed attachment. QOGFI1PAFFor padlocking 2P and 3P QO-GFI, QO-EPD, and QO-EPE circuit breakers in OFF position only, fixed attachment. QOGFI2PAF

Sub-Feed Lugs 60 A 2P plug-on – 2 spaces required (6–2 Al/Cu) QO60SL125 A 2P plug-on – 2 spaces required (12–2/0 Al/Cu) QO2125SL225 A 2P plug-on – 4 spaces required (4–300 Al/Cu) QO2225SLa125 A 3P plug-on – 3 spaces required (12–2/0 Al/Cu) QO3125SL

Mechanical Interlock Attachment For interlocking the handles of two 2P or one 2P and one 1P QO and Q1 circuit breakers mounted side-by-side so that only one circuit breaker can be ON at a time (Not QOU) QO2DTI

With Retaining Kit: QO2DTI mechanical interlock attachment with retaining kits for securing two adjacent back-fed circuit breakers in dual power supply applications. Can be used with (2) 2Ps or (1) 2P and (1) 1P QO circuit breakers in QO816L100 load centers. QO2DTIM

a Not suitable for use in 3Ø panels. Use only in 1Ø panel rated 150 A or greater.

QOHPL

QO1PA QO1PL

QO2DTI

QO1HT

QO1HPL

HLO1

QO1LO

QOTHPAQO2PAF

QO1PAF

QOGFI2PAF

Factory-Installed Accessories

Accessory Description Rated Voltage

Coil Burden

Cat. No.Suffix

$ PriceAdder Accessory Description Contact

Comb.Max.

VoltageMax.Load

Cat. No.Suffix

$ PriceAdder

Shunt Trip

Trips the circuit breaker from a remote location by means of a trip coil energized from a separate circuit. A 120 Vac shunt trip will operate at 55% or more of rated voltage. All other shunt trips will operate at 75% or more of rated voltage.

Application• For use with momentary or

maintained push button.• Not available on QO-GFI,

QO-EPD, QO-AFI, QOCAFI.

• Shunt trip terminals accept (2) 14–12 AWG Cu.

AC/DC12 60 VA

-1042

Auxiliary Switches

Monitors circuit breaker contact status and provides a remote signal indicating the circuit breaker contacts are OPEN or CLOSED.

Application

• Auxiliary switch terminals accept(2) 14–12 AWG Cu leads.

1A1B

AC 120AC 120

5 A5 A

-1200-1201

24 168 VA

AC120 72 VA

-1021208 228 VA240 288 VA

Alarm Switches

Used with control circuits and is actuated only when the circuit breaker has tripped. Standard construction includes a normally-open contact.

Application

• Alarm switch terminals accept(2) 14–12 AWG Cu leads.

1A AC 120 5 A -2100

Class 1130 / Refer to Catalog 0730CT9801

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QO™ and QOU Miniature Circuit BreakersQOU Miniature Circuit Breakers

Low Ampere QOU Miniature Circuit BreakersQOU unit mount miniature circuit breakers (cable-in/cable-out) are ideal for OEM applications. They have the Square D™ circuit breaker’s unique Visi-Trip™ feature and can be DIN rail-mounted or surface- or flush-mounted using mounting feet.

a QOU-H interrupting rating is 10 kA at 240 Vac.

High Ampere QOU Circuit Breakers

Interrupting Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page DE3-3Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page DE3-12, DE3-15Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page DE3-54

General Specifications Common to All Low Ampere QOU Circuit Breakers

• For convenient flush mount, surface mount or DIN mount (symmetrical rail 35 x 7.5 DIN/EN 50 022)

• Single handle with internal common trip• Terminal lug wire size (1) 14–2 AWG Cu or Al• Reversible line and load lugs• Field-installable quick connectors

• CSA/UL Listed 48 Vdc (5 k AIR)• CSA/UL Listed as HACR Type: 10–70 A• High magnetic trip circuit breakers (QOU-HM) are recommended

for applications where high initial inrush may occur and forindividual dimmer applications.

QOU Low Ampere Miniature Circuit Breakers

Ampere Rating

1P 120/240 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac

Cat. No. $ Price Cat. No. $ Price Cat. No.a $ Price Cat. No. $ Price

10 k AIR

10 A QOU110 QOU210 — QOU31015 A QOU115 QOU215 QOU215H QOU31520 A QOU120 QOU220 QOU220H QOU32025 A QOU125 QOU225 QOU225H QOU32530 A QOU130 QOU230 QOU230H QOU33035 A QOU135 QOU235 — QOU33540 A QOU140 QOU240 — QOU34045 A QOU145 QOU245 — QOU34550 A QOU150 QOU250 — QOU35060 A QOU160 QOU260 — QOU36070 A QOU170 QOU270 — QOU370

22 k AIR

15 A QOU115VH QOU215VH — QOU315VH20 A QOU120VH QOU220VH — QOU320VH25 A QOU125VH QOU225VH — QOU325VH30 A QOU130VH QOU230VH — QOU330VH35 A QOU135VH QOU235VH — —40 A QOU140VH QOU240VH — —45 A QOU145VH QOU245VH — —50 A QOU150VH QOU250VH — —60 A QOU160VH QOU260VH — —

QOU-HM Miniature Circuit Breakers (10 k AIR)

Ampere Rating

1P 120/240 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac

Cat. No. $ Price Cat. No. $ Price Cat. No. $ Price Cat. No. $ Price

15 A QOU115HM — — —20 A QOU120HM — — —

General Specifications Common to All High Ampere QOU Circuit Breakers

• Flush mount, surface mount, and DIN rail mount.• Internal common trip.• Non-reversible line and load lugs.• Terminal lug wire size (1) 12– 2/0 AWG Cu or Al.• UL Listed 60 Vdc per pole (5 k AIR). (Note: except switches)

• CSA/UL Listed as HACR type, 80–125 A.• Non-automatic switches have the same physical packaging

as miniature circuit breakers, but provide no overcurrent orshort circuit protection. They are UL Listed per UL1087 andare CSA certified.

QOU High Ampere Miniature Circuit Breakers (10 k AIR)

Ampere Rating

1P 120/240 Vac 2P 120/240 Vac 2P 240 Vac 3P 240 Vac

Cat. No. $ Price Cat. No. $ Price Cat. No. $ Price Cat. No. $ Price

80 A QOU180 QOU280 — — QOU38090 A QOU190 QOU290 — — QOU390

100 A QOU1100 QOU2100 — — QOU3100125 A — QOU2125 — — —

QOU Non-Automatic Switches

Ampere Rating

1P 120 Vac$ Price

2P 120/240 Vac$ Price

2P 240 Vac $ Price

3P 240 Vac$ Price

Cat. No. Cat. No. Cat. No. Cat. No.

60 A — — QOU200 QOU300100 A — — QOU2000 QOU3000125 A — — QOU20001 QOU30001

Low Ampere QOU

High Ampere QOU

Class 720 / Refer to Catalog 0730CT9801

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Dimensions and Shipping WeightsMiniature and Molded Case Circuit Breakers

a 35–70 A is 3.12 in; 80–100 A 2-pole and 70–100 A 3-pole are 3.50 in.b QO-PL is 4.55 in.c 80–100 A 1-pole and 80–125 A 2-pole are 4.45 in.d 70–100 A 4.45 in.e 80–100 A 1-pole and 80–125 A 2-pole are 6.78 in.f 70–100 A is 6.78 in.

g Dimensions E are 1.59 in at ON end and 0.63 in at OFF end.

h All weights are for 3P circuit breakers unless otherwise noted.

B E

AG

Figure 2

B E

AG

Figure 1

B E

AG

Figure 3DC

QO, QOB

QO-GFI, QO-PLQO-EPD

DC

Figure 5AG

BE

A

BE

G

Figure 4

B

AG

E

Figure 6AG

B E

Figure 7AG

B E

Figure 8

DC

F

QOU, QYULow Ampere

QOUHigh Ampere

CD

FB

Figure 13A

B

Figure 14A

B

Figure 15A

B

Figure 16A

B

CD

C60

E

Figure 17A

B

Figure 18A

B

Figure 19A

B

Figure 20A

B

Figure 21BE

FA

E

G

C/L

Figure 22BE

E

FA

Figure 23

C/L

BD

CG

H HE

E

FA

BG

E

E

FA

DC

Figure 24

Figure 9 Figure 10 Figure 11

Figure 10

A

B E

Figure 11

A

B E

Figure 12

A

B E

QO™, QOU, Multi 9™ Circuit BreakersCircuit BreakerCatalogue No.

Prefix

No.Poles

Fig.No.

Dimensions—Inches

A B C D E F G

QO, QOB

1 1 0.75 3.00a 2.31 2.91 2.25 . . . 0.59

2 2 1.50 3.00a 2.31 2.91 2.25 . . . 1.34

3 3 2.25 3.00a 2.31 2.91 2.25 . . . 2.09

QOB-VH 150 AQOB-VH 110–150 A

2 2 3.0 5.72 2.53 4.90 3.78 . . . 2.85

3 3 4.50 5.72 2.53 4.90 3.78 . . . 4.35

QO-PLQO-GFIQO-EPD

1 4 0.75 4.12b 2.31 2.91 2.25 . . . 0.59

2 5 1.50 4.12b 2.31 2.91 2.25 . . . 1.34

3 5 2.25 4.12b 2.31 2.91 2.25 . . . 2.09

QOULow Ampere

1 6 0.75 4.05c 2.38 2.98 2.25 5.00p 0.62

2 7 1.50 4.05c 2.38 2.98 2.25 5.00p 1.37

3 8 2.25 4.05d 2.38 2.98 2.25 5.00f 2.12

QOUHigh Ampere

1 9 0.75 4.45 2.37 2.96 2.25 6.78 . . .

2 10 1.50 4.45 2.37 2.96 2.25 6.78 . . .

3 11 2.25 4.45 2.37 2.96 2.25 6.78 . . .

Multi 9™ C60

1 13 0.71 3.19 1.73 2.76 1.77 — —

2 14 1.42 3.19 1.73 2.76 1.77 — —

3 15 2.13 3.19 1.73 2.76 1.77 — —

4 16 2.84 3.19 1.73 2.76 1.77 — —

QB, QD, QG, QJ, Q4, FA, FI, KI, LA, LH Circuit BreakersCircuit BreakerCatalogue No.

Prefix

No.Poles

Fig.No.

Dimensions—Inches

A B C D E F G H

QB, QD, QG, QJ

2 22 6.47 3.00 3.02 3.93 g 4.25 . . . . . .

3 23 6.47 4.50 3.02 3.93 g 4.25 1.50 0.75

FAL, FHL

1 21 6.00 1.50 3.16 4.13 0.44 5.13 1.50 . . .

2 22 6.00 3.00 3.16 4.13 0.44 5.13 . . . . . .

3 23 6.00 4.50 3.16 4.13 0.44 5.13 1.50 0.75

FIL, KIL 2 & 3 23 8.00 4.50 3.66 4.75 0.44 7.13 1.50 0.75

Q4L, LAL, LHL 2 & 3 23 11.00 6.00 4.06 5.84 0.88 9.25 2.00 1.00

Shipping Weightsh

Frame Size Approx. Shipping Weight (Lbs.) Frame Size Approx. Shipping

Weight (Lbs.)

FAL, FHL 1P 2 KIL 9

FAL, FHL 2P 3 LAL, LHL 15

FAL, FHL 3P 5 LIL LXIL 25

FIL 8 Q4L 15

QB, QD, QG, QJ 4

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QOU Miniature Circuit Breakers and SwitchesApplication Information

309/2005 © 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-PoleTerminal 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)

Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com

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QOU Miniature Circuit Breakers and SwitchesApplication Information

509/2005 © 2005 Schneider Electric All Rights Reserved

Line and Load Connections

QOU miniature circuit breakers are supplied with two types of lug configuration as standard, depending on the continuous current rating:

• 10–70 ampere one- and two-pole; reversible lugs

• 10–60 ampere three-pole; reversible lugs

• Other ampere ratings; forward lugs only

The box-type lugs supplied on QOU miniature circuit breakers are UL Listed and CSA 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° C, 75° C and 90° C), sized according to the NEC 176° F (75° C) temperature rating. See the Accessories section for more information on terminations.

Optional terminations, such as quick connectors, are also available. See the Accessories section for more information on terminations.

Ring-tongue terminals can be factory ordered using the following catalog number designations:

• QOU_ _ _3100 (ring-tongue terminal wired from front)

• QOUR_ _ _5283 (ring-tongue terminal wired from rear)

Mounting Provisions

QOU 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 Accessories section for more information on mounting brackets. Tapped mounting feet can be ordered using the catalog number designation QOU_ _ _3100.

All QOU miniature circuit breakers also come equipped with slots in the molded case for DIN rail mounting.

These miniature circuit breakers are designed for use with a standard 35 mm DIN mounting rail (DIN/EU 50 022, 0.30 x 1.38 in. [7.5 mm x 35 mm]).

Standards

Square D brand QOU miniature circuit breakers are manufactured and tested according to the following standards:

• UL Standard 489 (File E84967)

• NEMA Standard AB1

• Canadian Standards Association CSA C22.2 No. 5-02

• IEC 60947-2

• CE

Square D brand QOU non-automatic switches comply with:

• UL Standard 489

• Canadian Standards Association CSA C22.2 No. 5-02

NOTE: Circuit breakers are to be applied by guidelines detailed in the NEC and other applicable electrical codes.

Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com

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6© 2005 Schneider Electric All Rights Reserved 09/2005

QOU Miniature Circuit Breakers and Switches Application Information

Catalog Numbers

Square D brand circuit breakers are ordered by a catalog number that includes the circuit breaker family, description, number of poles, amperage rating and suffix.

Ratings for QOU Miniature Circuit Breakers

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.

QOU circuit breakers are selected by their ratings. A circuit breaker’s rating must meet or exceed the parameters of the electrical system on which they are used.

Voltage Rating

A 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. QOU 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)

Table 2: Catalog Numbers

Typical Catalog Number:

QO U 2 30 H 2100

QO Miniature Circuit Breaker Family

Description

U – Unit Mounted (Lugs on Both Ends)

No. of Poles

1 – 1-pole

2 – 2-pole

3 – 3-pole

Ampere Rating

10–125 Ampere Rating

00 = 60 A, 000 = 100 A, and 0001 - 125 A QOU Switch

Rating

1- and 2-pole 2-pole 3-pole

No Letter-Standard 120/240 Vac Rating VH - 22,000 AIR No Letter - 240 Vac Rating

VH - 22,000 AIR H-240 Vac Rating VH - 22,000 AIR

Suffix

XXX (i.e., 2100) - Indicates Factory-installed Accessory (See page 12)

Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com

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QOU Miniature Circuit Breakers and SwitchesApplication Information

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Interrupting Rating

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. Circuit 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).

Continuous Current Rating

The continuous current rating of a circuit breaker is defined by the National Electrical Manufacturers Association (NEMA) 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° C) in free air. QOU circuit breakers should be applied, per the NEC, 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 Duty

The switching duty (SWD) listing applies only to 15 A and 20 A 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.

Table 3: Interrupting Rating

Circuit Breaker

Type

No. of Poles

Ampere Rating

UL Listed Interrupting Rating—RMS Sym. Amperes

AC Volts DC Volts1

1 DC ratings do not apply to circuit breakers rated for 10 A

120/240 240 277 48 60

QOU

1

10–30 NA NA 5 kA

10–70 10 kA NA NA 5 kA NA

80–100 10 kA NA NA NA 5 kA

210–70 10 kA NA NA 5 kA NA

80–125 10 kA NA NA NA 5 kA

310–70 NA 10 kA NA 5 kA NA

80–100 NA 10 kA NA NA 5 kA

QOU-H 2 15–30 NA 10 kA NA 5 kA NA

QOU-VH 2 15–60 22 kA NA NA 5 kA NA

NA = Not Applicable

Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com