Circuit Breakers for Branch Circuit Protection

Descrição

The UL 489 Series miniature molded case circuit breakers are DIN rail mountable and provide feeder and branch circuit protection per UL 489. Typical uses include convenience receptacles, motor controls, load circuits leaving equipment, and heating and air conditioning. UL 489 Series miniature circuit breakers are available in one-, two-, three- and four-pole configurations and up to 23 different current ratings from 0.3A to 63A and can safely be used in applications up to 480Y/277 Vac with a 10kA short circuit withstand rating.

AC Application C-Trip Curve
Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications. Relatively short thermal trip delay and medium magnetic trip point.
AC Applications D-Trip Curve
High inrush motors, transformers, power supplies, heaters and reactive loads. Relatively long thermal trip delay and very high magnetic trip point.
DC Applications C and D-Trip Curves
Telecommunication equipment, computer equipment, uninterruptable power supplies.


Features Provided by the Different Types of Circuit Breakers
UL1077 Recognized Supplementry Protectors
    Overload Protection

UL508 Listed Manual Motor Controllers
    Overload Protection
    Switching Function
    Disconnect Function

UL489 Miniature Molded Case Circuit Breakers
    Overload Protection
    Switching Function
    Disconnect Function
    Short Circuit Protection

Specifications
Current/Voltage Rating:
    AC: 0.3-63A – 240 Vac
    AC: 0.3-32A 480Y/277 Vac
    DC: 0.3-63A 125 Vdc 1-pole - 250 Vdc 2-pole
Electrical Life: 6000 cycles on/off
Mechanical Life: 10,000 cycles on/off
Calibration Temperature: 40°C (104°F)
Operating Temperature: -25 to 55°C (-13 to 131°F)
Storage Temperature: -25 to 70°C (-13 to 158°F)
Wire Connection: Copper wire only, 60/75°C
Terminal Size Acceptability: Top 18-3 AWG, Bottom18-2 AWG
Tightening Torque Minimum/Maximum: 17.7/ 22lb-in. (2/2.2 Nm)
Terminal Protection Degree: IP20
Dimensions:
Height: 105.3mm (4.15")
Width: One Pole 17.5mm (0.69"), 2 Pole 35mm (1.38"), 3 Pole 52.5 mm (2.07")

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