Most of these miniature circuit breakers protect electrical
circuits from overcurrent by thermal type trip and short circuits by magnetic
trip. Miniature circuit breakers are physically small and protect relatively
low amperages: usually 10 - 150A. They are available in 1, 2, and 3-poles,
and used in 120V, 120/240V, 240V, and 480Y/277V ac and up to 125V dc systems.
They usually have a toggle operating mechanism for manual disconnect and
to show the breaker status. Several different product lines are available
for use in UL67 individual enclosures, load centers, panelboards, and OEM
equipment. They are tested to UL489 Molded Case Circuit Breaker standard. |
UL
1077 Supplementary Protectors
Supplementary protectors are intended for use as overcurrent
protection within an appliance or other electrical equipment where branch
circuit overcurrent protection is already provided (by UL 489 device) or
is not required. Physically resembling miniature circuit breakers, they
are commonly used in OEM equipment downstream of a UL 489 device to provide
protection of sensitive circuits within the equipment. |
Molded
Case Circuit Breakers
The complete line of Molded Case Circuit Breakers
includes thermal-magnetic, current limiting, electronic trip, and remotely
operated circuit breakers. These breakers are commonly used in UL 67 individual
enclosures and panelboards and UL 891 switchboards. |
Insulated
Case Circuit Breakers
The industry's leading line of medium to large size
circuit breakers, featuring the MASTERPACT® NW series, which leads the
industry with higher interrupting ratings, smaller footprint, and more accessories,
including our exclusive "P" trip unit, which provides built-in
POWERLOGIC® power monitoring capabilities. |
Low
Voltage Power Circuit Breakers
The industry's leading line of medium to large size
circuit breakers, featuring the MASTERPACT® NW series, which leads the
industry with higher interrupting ratings, smaller footprint, and more accessories,
including our exclusive "P" trip unit, which provides built-in
POWERLOGIC® power monitoring capabilities. |
Medium
Voltage Circuit Breakers
The Type VR vacuum circuit breaker provides interrupting
capability for medium voltage systems up to 15kV. The Type VR breaker is
a horizontal drawout circuit breaker designed for use with metal-clad switchgear. |
Circuit
Breaker Services
Square D Services includes comprehensive solutions
for retrofit, reconditioning, refurbishment and replacement of circuit breakers.
No matter what your need you can leverage these solutions and the global
expertise of Square D/Schneider Electric to ensure reliability, reduce maintenance
costs and extend equipment life. We also provide solutions for all major
manufacturers' low and medium voltage circuit breaker brands. |
Ground-fault
Protection Products
Ground fault protection products can provide ground-fault
protection at any level; main circuit, feeder circuit and branch circuit. |
Operating
Mechanisms and Disconnect Switches
Door-Mounted Switches and Circuit Breaker Mechanisms,
Flange-Mounted and Cable-Operated Disconnect Switches and Circuit Breaker
Mechanisms, Door Closing Mechanisms |