QOU150 SQUARE D, QOU150 Datasheet - Page 11

• Manufacturer Part Number: QOU150
• Description: CIRCUIT BREAKER, THERMAL MAG, 1P, 50A
• Manufacturer: SQUARE D
• Series: QOUr
• Type: Thermal/Magneticr

Specifications of QOU150

• Actuator Style: Toggle
• No. Of Poles: 1
• Current Rating: 50A
• Voltage Rating Vdc: 48V
• Voltage Rating Vac: 240V
• Mounting Type: DIN Rail
• Actuator Type: Handle
• Brand/series: QOU Miniture — Low Ampere
• Number Of Poles: 1
• Special Features: Visi-Trip® Trip Indicator
• Voltage Rating: 120 V
• Leaded Process Compatible: No
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

09/2005
Interrupting Rating (AIR) at 400 Hz.
At frequencies above 60 Hz, the interrupting rating of thermal-magnetic circuit breakers is less than the
60 Hz interrupting rating. Unless specifically marked for use of 400 Hz systems, the interrupting rating
of Square D circuit breakers is reduced to 1/10th of the 60 Hz interrupting rating.
Magnetic Tripping Performance
At frequencies above 60 Hz more current is necessary to magnetically trip a circuit breaker than at 60
Hz. Fig. 3 shows the multipliers of 60 Hz current that it takes to instantaneously trip a circuit breaker
when applied at various frequencies. For example, at 60 Hz, it takes 700 A or more to magnetically trip
a 100 A QOU circuit breaker per trip curve 730-7 (page 26). At 400 Hz, it takes 1820 A (2.6 multiplier)
or more to magnetically trip the same circuit breaker.
Figure 5:
1.5
20
15
10
9
8
7
6
5
4
3
2
1
60 Hz Current Multiplier
Line Frequency in Hertz
QOU Miniature Circuit Breakers and Switches
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Application Information
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