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SQUARE D

Square D manufactures switches, pushbuttons, starters & contactors, relays, fuses and transformers.
Square D single & double pole switches are used to open or close an electrical circuit and are also used as Auto On / Off / Start devices. Limit & interlock switches automatically activate or deactivate power to a device when its travel limits exceed, keeping users & equipment safe from malfunctioning machinery. Liquid level switches on the other hand use a float mechanism to start / stop pumps, open / close valves or activate level alarms by detecting fluid levels. Pressure and vacuum switches are used to track pressure levels & vacuum conditions and control power to hydraulic and pneumatic systems like air compressors & water pumps.
Circuit breakers are designed to control voltage levels and prevent overload conditions in electrical systems. These circuit breakers are available in miniature and moulded case sizes having bolt on or plug in design. The bolt on circuit breakers are used in industrial settings for vibration proof, permanent operations. They can be removed safely only after power to the equipment is switched off. The plug in circuit breaker on the other hand can be removed and replaced easily without disconnecting power from the source. These plug in circuit breakers are cheaper & riskier than bolt on circuit breakers and are used in light commercial applications that do not require permanent installation of the circuit breakers.
Square D panelboards are used to distribute power downstream from main breakers. They protect the housed equipment from rain, dust, snow and other environmental conditions. Load centres are a specialised type of panel board that accept only plug-in circuit breakers having voltage ratings up to 240V for light commercial & industrial usage. Homeline (HOM) Series load centres are used with HOM series circuit breakers and QO Series load centres are used with QO series circuit breakers only.
Choose from a wide range of these circuit breakers and related accessories, such as hook sticks, lever arms, auxiliary contacts and mounting hardware on Raptor Supplies.

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SQUARE D Bolt On Miniature Circuit Breakers

Bolt On Miniature Circuit BreakersSquare D 1, 2 and 3 pole circuit breakers are designed to control voltage levels and protect control panels & devices from overcurrent & short-circuit damage. They are offered in main breaker, standard and high interrupt capacity designs.(470 Products)

SQUARE D Overload Relays

Overload RelaysFacilitate motor overload protection in Type S, NEMA-style magnetic motor starters. Feature an automatic or manual reset function that also offers maximum current adjustment. Available in current ratings ranging between 0.4 & 32A(35 Products)

SQUARE D Definite Purpose Magnetic Contactors

Definite Purpose Magnetic ContactorsSquare D reversible and non reversible relays are designed to offer automatic shut-off during power failures. They are suitable for use with circuits where overload protection is separately offered, and can handle fully inductive loads up to 90A.(96 Products)

SQUARE D Load Centers and Panelboards

Load Centers and PanelboardsSquare D load centers and panelboards distribute electrical current in residential, commercial and industrial applications. They use Square D circuit breakers to prevent damage. These circuit breakers interrupt the flow of the current of an overloaded circuit.(219 Products)

SQUARE D Control Transformers

Control TransformersPower transformers designed with low impedance windings to handle the high inrush current flow from contactors, starters, solenoids and relays. Available in 120 - 480 VAC input voltage range(170 Products)

SQUARE D Circuit Breaker Enclosures

Circuit Breaker EnclosuresSquare D NEMA rated steel / stainless steel enclosures are designed to protect users from accidentally contacting energised parts of circuit breakers & molded switch cases. They are capable of handling current flow up to 1000 A.(30 Products)

SQUARE D Ground Bar Kit

Ground Bar KitSquare D ground bar kits are compact and lightweight kits used in CSED devices, load centres and NQOD and NF panel boards. These ANSI certified ground bar kits feature 15 terminals and feed wires to the neutral bar in load centres.(13 Products)

SQUARE D Magnetic Starters with Thermal Overload

Magnetic Starters with Thermal OverloadSquare D magnetic starters with thermal overload are designed to provide under-voltage and overload protection in sensitive electrical circuits or panelboards. They feature an electromagnetically operated switch for starting the connected motors with a maximum current rating of 27A.(103 Products)

SQUARE D Safety Relays

Safety Relays(44 Products)

SQUARE D Buck Boost Transformers

Buck Boost TransformersUL and cUL (UL 506) listed low voltage buck-boost transformers featuring NEMA 3A- / 3R-rated enclosures and a space-saving circuit design; used to provide small changes in voltage for matching load requirements. Convert 208Y / 120 V power to standard motor voltages (26 Products)

SQUARE D Circuit Breaker Accessories

Circuit Breaker AccessoriesSquare D circuit breaker accessories such as brackets, handle padlocks & extensions, interlocks, lug kits and shunt trips are designed for use with Square D circuit breakers.(217 Products)

SQUARE D Load Center and Panelboard Accessories

Load Center and Panelboard AccessoriesSquare D load center and panelboard accessories are employed to customize, mount and enhance the safety of Square D panelboards and load centers. These panelboards and load centers help to distribute electrical power.(86 Products)

SQUARE D Manual Motor Switches and Starters

Manual Motor Switches and StartersSquare D manual motor switches and starters are suitable for ON/OFF switching operations in small 1 phase, 3 phase or DC motors installed in pumps, fans, small machine tools and conveyors. They can handle current up to 30A and operating voltage up to 600VAC.(103 Products)

SQUARE D Liquid Level Switches

Liquid Level Switches(90 Products)

SQUARE D Bus Plugs

Bus PlugsSquare D bus plugs are designed for maximum flexibility, easy installation and high electrical efficiency in low power distribution systems. They allow continuous current flow and feature totally enclosed housing to eliminate accidental busbar contacts.(47 Products)

SQUARE D Thermal Units

Thermal UnitsUsed to protect controllers, motors and branch-circuit conductors from excessive heating and over-current conditions. Capable of tripping the circuit assembly within 20 seconds or less. Available in amperage ratings ranging from 0.3 to 19.2A(112 Products)

SQUARE D Float Balls

Float Balls(8 Products)

SQUARE D Combination Starters

Combination StartersSquare D UL listed combination starters have a NO / NC / no actuator circuit design to secure electric circuits from both overcurrent loads and short circuits. They come equipped with melting alloy overload relays.(55 Products)

SQUARE D Current Transformers

Current TransformersSolid- and split-core current transformers designed for use with meters, panels & signalling devices to control and measure electrical currents as high as 2000 A(13 Products)

SQUARE D NEMA Magnetic Contactors

NEMA Magnetic ContactorsDesigned to balance alterations in electrical frequencies and ensure automatic cutoff during power failure conditions(35 Products)

SQUARE D Power Relays

Power Relays(9 Products)

Things To Consider

Cross-Reference Alternatives

Square D circuit breakers cross reference with General Electric, Bussmann and Eaton circuit breakers. If you're looking for competitor equipment or a tool that is either out of stock or obsolete, chances are there that Raptor Supplies has the equivalent Square D equipment available.

Shipping

These Square D equipment sizes vary from small to large. They may require careful packaging as some of the tools may get damaged while shipping. Hence, these Square D equipment are delivered by courier shipment and air freight for minimum downtime.

About Square D

Square D manufactures switches, pushbuttons, starters & contactors, relays, fuses and transformers.
Square D single & double pole switches are used to open or close an electrical circuit and are also used as Auto On / Off / Start devices. Limit & interlock switches automatically activate or deactivate power to a device when its travel limits exceed, keeping users & equipment safe from malfunctioning machinery. Liquid level switches on the other hand use a float mechanism to start / stop pumps, open / close valves or activate level alarms by detecting fluid levels. Pressure and vacuum switches are used to track pressure levels & vacuum conditions and control power to hydraulic and pneumatic systems like air compressors & water pumps.
Circuit breakers are designed to control voltage levels and prevent overload conditions in electrical systems. These circuit breakers are available in miniature and moulded case sizes having bolt on or plug in design. The bolt on circuit breakers are used in industrial settings for vibration proof, permanent operations. They can be removed safely only after power to the equipment is switched off. The plug in circuit breaker on the other hand can be removed and replaced easily without disconnecting power from the source. These plug in circuit breakers are cheaper & riskier than bolt on circuit breakers and are used in light commercial applications that do not require permanent installation of the circuit breakers.
Square D panelboards are used to distribute power downstream from main breakers. They protect the housed equipment from rain, dust, snow and other environmental conditions. Load centres are a specialised type of panel board that accept only plug-in circuit breakers having voltage ratings up to 240V for light commercial & industrial usage. Homeline (HOM) Series load centres are used with HOM series circuit breakers and QO Series load centres are used with QO series circuit breakers only.
Choose from a wide range of these circuit breakers and related accessories, such as hook sticks, lever arms, auxiliary contacts and mounting hardware on Raptor Supplies.

Major Trade Names

QO Series Circuit Breakers

Square D QO Series circuit breakers provide industrial and commercial circuit protection against damage from overload and short-circuit on AC and DC systems. 1, 2 or 3 pole QO Series circuit breakers are suitable to plug on QO Series load centres, NQ and NQOD panelboards, OEM mounting bases or Speed...

-D switchboard distribution panels. Each pole of the QO Series circuit breakers has an individual thermal-magnetic trip element that is calibrated for 40 degrees C ambient temperature. Square D QO Series circuit breakers also have a Visi-Trip window below the handle to identify the tripped breakers quickly.

Homeline Series Circuit Breakers

Square D Homeline Series circuit breakers provide arc fault, combination arc fault (CAFI), ground fault (Class A, GFCI) and dual function (CAFI and GFCI) protection to 1 / 2 pole electrical equipment. These Square D Homeline Series are generally cheaper & larger in size as compared to QO Series circ...

uit breakers. They have separate handles for each pole joined together using a handle tie. Compared to QO Series circuit breakers, Square D Homeline Series circuit breakers have different feet and connection mechanisms for attaching to respective Homeline Series load centres.

Square D Competitive Advantages

Visi-Trip indicator

Visi-Trip indicator

Square D QO and QOB Series circuit breakers have a Visi-Trip trip indicator to provide a visual indication that the circuit breaker has tripped & interrupted the circuit. When a QO Series circuit breaker trips, its handle assumes a centre position & the Visi-Trip indicator denotes red colour in a window located under the handles in the circuit brea...

ker case. This patented Visi-Trip indicator lights up only when the circuit breaker has tripped for quick identification of the circuit from any other circuits which are merely in the on or off position. For resetting these Square D circuit breakers, push the handle to OFF and then to ON position. Restarting of the circuit turns off the Visi-Trip indicator to denote normal operation.

Time Saver Diagnostics

Time Saver Diagnostics

Square D QO and HomeLine circuit breakers feature Time Saver Diagnostics to provide timely diagnostic assistance with the touch of a button when a circuit trip occurs. This technology helps the contractors and electricians to identify the type & cause of fault that has occurred, providing faster troubleshooting time.

Square D Time Saver Diagnostics is very simple and easy to use. It does not require any tools or special training. Follow these steps for identifying the cause of a fault:

...
  • Turn off the circuit breaker, continue to hold the TEST button and turn the circuit breaker back on.
  • If the circuit breaker trips immediately (within 1 second), then a ground fault is being detected.
  • If the circuit breaker trips after 2 seconds, then the Time Saver Diagnostics is detecting an arc fault.
  • In case the circuit breaker trips at 5 seconds, it indicates either no fault or thermal overload or a short circuit.

Frequently Asked Questions

Which company owns Square D?

Square D, headquartered in Andover, Massachusetts, USA, is owned by Schneider Electric, a leading electrical equipment manufacturer.

How to select appropriate load centres & circuit breakers?

Following are the major points that users should note while selecting the appropriate load centre or circuit breaker for their applications:

  • Space restriction: Users should choose their circuit breakers based on the space available in the load centre. QO Series circuit breakers are offered generally in 3/4 inch format whereas, the Homeline Series circuit breakers are available in the 1-inch format.
  • Enclosure type required: Rainproof enclosures may be required, depending on the location of application (indoor or outdoor).
  • Electric power supply: Load centres and circuit breakers can be supplied with either single-phase or 3 phase electrical power.
  • Features: Users should select Load centres by taking note of the main circuit breaker, main lugs & generator panel available with them.
  • Ground bar option: Selected ground bars in load centres are factory-installed, whereas some ground bars need to be field installed.
  • Electrical ratings: Users should always check the ampere ratings of the load centres & circuit breakers before purchasing them. They should also take note of the pole spaces and the maximum number of 1-pole, single-phase circuits that a load centre can handle.

What safety instructions should operators follow while using Square D tools?

Users / operators should turn off the power supply before performing any work on any equipment. They should use proper personal protective equipment (PPE) and follow safe electrical work practices, such as appropriately rated voltage sensing devices at all lines. Some Square D equipment and instruments may require periodic cleaning and lubrication.

What standards / certifications do Square D equipment abide by?

Square D equipment can be UL listed or CSA certified while adhering to National Electrical Code (NEC, USA) standards. Square D products are compliant with RoHS, REACh standards as well for minimal use of hazardous substances during manufacturing. Selected Square D equipment are IP & NEMA rated for use in indoor & outdoor applications.