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Furnas Controls
Furnas Controls

Furnas Controls

Furnas Electric Controls: Motor Starters, Contactors, Overload Relays and Pushbuttons

Furnas Siemens Controls

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Control Panel Fabrication Information

State-Electric is proud to be an authorized distributor of Furnas Controls / Siemens Controls. We offer a wide selection of Furnas Controls; Motor Starters, Furnas Contactors and Furnas Pushbuttons. State Electric offers new units in the Furnas Controls / Siemens line as well as replacement parts, contact tips and coils. Furnas products available to companies through State Electric include:

Furnas Contactors and Starters - NEMA

Furnas / Siemens. Leading the Industry With the Largest Selection of NEMA Starters

Siemens is leading the industry with the largest selection of NEMA Starters. Typical applications include use with machine tools, air conditioning equipment, material handling equipment, compressors, hoists and various production and industrial equipment, as well as in demanding automotive applications.

NEMA Contactor Starter NEMA starters are ideal for applications requiring dependability and durability. These starters are built rugged to withstand the most severe and demanding industrial and continuous duty commercial applications in the industrial and construction markets. This includes standard full NEMA sizes and motor matched half sizes exclusive to Siemens. Starters are available as open and enclosed with electronic and bimetal overload protection, as well as a wide selection of accessories and spare parts.

Furnas Contractors and Starters - NEMA
Product Photo
Non-Reversing Starters, Class 14 Non Reversing Class 14
Combination Starters, Class 17 and 18 Combination Starters Class 17 and 18
Reversing Starters, Class 22 Reversing Starters Class 22
Combination Reversing Starters, Class 25 and 26 Combination Reversing Starters Class 25 and 26
Two Speed Starters, Class 30 Two Speed Starters Class 30
Combination Two Speed Starters, Class 32 Combination Two Speed Starters Class 32
Non-Reversing Contactors, Class 40 Non-Reversing Contactors Class 40
Vacuum Contactors, Class 40
Reversing Contactors, Class 43 Reversing Contactors Class 43
Accessories, Modifications and Heater Elements Accessories, Modifications and Heater Elements

Definite Purpose Furnas Controls (Siemens)

Install the Best: Quality, Versatility and Flexibility in Design - Furnas DP Controls

Definite Purpose Controls @ Furnas / SiemensQuality in Design: A cushioned coil and precision fit assembly minimizes an irritating buzz or hum. Made of high-impact, precision-thermoset polyester housing, Furnas DP controls are more rugged than controls made of phenolic or thermoplastic resins.

Versatility in Design: Furnas Definite Purpose Contactors are used in an assortment of applications in the Heating, Ventilating, Air Conditioning and Refrigeration Industries.

Flexibility in Design: Terminal Connections in a variety of styles from quick connects, box lugs or clamp screw. Snap on accessories for easy field maintenance. Dual voltage coils available for fewer components.

Common definite purpose controls applications include:

  • Heating, Ventilating, Air Conditioning and Refrigeration
  • Welding Industry
  • Food and Beverage Industry
  • Pool and Spa / Pumps and Compressors
  • Hoist and Cranes / Conveyors

Definite Purpose Contactors

45EG20AJ 42AF25AJ
  • Class 45 - 1 &: 2 Pole 20 - 40 FLA
  • Class 42 - 2 &: 3 Pole 25 - 150 FLA
  • Class 42 - 2, 3 &: 4 Pole 25 - 40 FLA

Defintie Purpose Two Speed Motor Controls

  • Class 34 - 3-2 Pole 30 - 90 FLA
  • Class 34 - 4-3 Pole 30 - 40 FLA
  • Class 34 - 3-3 Pole 30 -90 FLA
  • Class 34 - 4-4 Pole 30 - 40 FLA

Definite Purpose Starters

  • Class 16 - 2, 3 & 4 Pole 25 - 40 FLA
  • Class 16 - 3 Pole 25 - 150 FLA
  • Class 16 - 2 & 3 Pole 25 - 60 FLA

Definite Purpose Reversing Contactors

  • Class 44 - 3 & 4 Pole up to 7.5 HP at 600V
  • Class 44 - 4-4 Pole up to 1.5 HP at 600V

Furnas Overload and Current Sensitive Relays - NEMA

Overload Relays

From general applications to special applications, Siemens offers a wide range of overload relays that provide superior motor protection. Overload relays are used to protect motors from excessive heat resulting from sustained motor overloads, rapid motor cycling, stalled rotor conditions and phase loss.

Solid-State Overload Relays, Class 48, 958, & 958L

Solid-state overload relays are ambient insensitive, self-powered and do not require heater elements.

  • Class 48 ESP100 solid-state overload relays offer additional protection over standard thermal overload relays. In addition to overload protection, they trip in three seconds or less in the event of a phase loss – fast enough to prevent motor damage. The ESP100 is available with trip class 10, 20, and 30 to fit a wide variety of applications.
  • Class 958 ESP100 special use solid state overload relays provide excellent protection of hermetically sealed compressors and artificially cooled motors which require ambient insensitivity and quick trip response time. The trip curves have been custom tailored to provide proper overload protection on such loads without causing nuisance tripping.
  • Class 958L ESP100 special use solid state overload relay are designed specifically for the oil market and the cyclical loads experienced with these types of pumping applications. These overload relays provide protection on all standard motors, oil well pump motors, multi-torque connections, and ultra-high slip motors.

Thermal Overload Relays, Class 48

Thermal Overload Relays, Class 48Ambient compensated bimetal overload relays are designed to compensate for the ambient air temperature surrounding the overload. This helps to prevent the occurrences of nuisance tripping. Additionally, they are automatic or manual reset selectable. Heater elements are required.

Current Sensitive Relays, Class 97

Current Sensitive Relays, Class 97Current sensitive relays monitor motor current and provide an instantaneous output if the motor current is over or under an adjustable set point. These over or under current conditions may be the result of a change in system status such as a jam, broken belt or dry well. Start-up delay, trip delay and current trip adjustments are provided to match the current sensitive relay to a specific application.

Furnas Pilot Devices

Furnas offers the widest selection of 30mm pushbuttons designed for the NEMA markets. Offering both standard die cast metal and the ultra rugged BLACK MAX styles, you can feel confident using the best pilot devices available.

Product Photo
Class 52 30mm Class 52 30mm
Class 52 - 30mm Black Max Corrosion Resistant Class 52 - 30mm Black Max Corrosion Resistant
Class 52 - Heavy Duty Push Button Stations Class 52 - Heavy Duty Push Button Stations

Pump Control Panels

Pump Control PanelsPump controllers monitor flow and/or level variables and control a pump accordingly to maintain the desired levels. Pump control can include simply turning a pump on and off or more advanced controls for pump speed, output pressure, etc.

Installation is easy. Panels are factory wired to provide flexible control and protect against short circuits and overloads. Ample space is provided for field modifications and installation of accessories. Siemens offer the Full Voltage Type Class 87, Reduced-Voltage Type Class 88 and Vacuum Starter Type Class 87.

Full Voltage Starter, Class 87

Full Voltage Starter, Class 87The full voltage starter pump controllers are specifically designed for the agricultural, petrochemical and other industries requiring pump control. They are built to withstand the harsh elements of the outdoors and are well suited for the most demanding environments.

Typical applications include:

  • Crop Irrigation
  • Oil Fields
  • Waste Water Treatment
  • Sprinkers

Reduced Voltage Starter, Class 88

Reduced Voltage Starter, Class 88The reduced voltage starter pump controllers are designed for the same applications and environments the Class 87 full voltage starter pump controllers serve. However, these controllers provide added protection for your equipment by stepping up the motor speed and thus reducing starting torque. The reduced voltage starter pump also complies with electrical current restrictions of utility companies.

Siemens manufacturers three most used reduced voltage pump controllers:

  • Auto Transformer
  • Part Winding
  • Wye Delta

Vacuum Starter Type, Class 87

Vacuum Starter Type, Class 87The vacuum starter pump controllers are designed for the harshest environments. Typically environments include chemical, petrochemical, waste water treatment and mining. Contaminations present in these severe environments are detrimental to conventional air-break contacts decreasing their life expectancy and reliability. The Siemens vacuum starter pump controllers are well suited for these environments because the contacts are contained in hermetically sealed contact tubes. This prevents contaminates in the atmosphere from affecting the operation of the contacts. Additionally, neither arcs nor arcing gases are produced which dramatically increases the electrical endurance of the contacts.

Reduced Voltage Starters

When a motor is energized by a full voltage starter, mechanical and electrical problems can occur. Potential mechanical problems include broken belts, gears or couplings or spilt or broken product. Potential electrical problems include deterioration of motor insulation or brown outs causing nuisance problems with other electrical equipment.

A reduced voltage starter helps to lessen these problems by reducing inrush line current and/or starting torque of a motor applied to the drive load. This is done by either reducing voltage applied to the motor during starting or by using only part of the motor windings during starting.

Siemens manufactures three commonly used electromechanical reduced voltage starters. Each one is designed for specific application requirements and consists of auto transformer, wye-delta and part-winding starters.

Auto Transformer

Auto TransformerThis type of starter is suitable for a general induction motor and is commonly used for the following applications:

  • Crushers
  • Fans
  • Conveyors
  • Compressors
  • Mixers


Part-WindingThis type of starter requires a motor with two separate windings and is commonly used for the following applications:

  • Low-inertia Fans & Blowers
  • Low-inertia Pumps
  • Refrigeration
  • Compressors

Wye Delta

Wye DeltaThis type of starter requires a motor with an externally connected stator and is commonly used for the following applications:

  • Central Air Conditioning Equipment
  • Compressors
  • Conveyors

Furnas / Siemens Duplex Controllers

The Siemens duplex motor controllers are specifically designed for industrial and commercial applications that require duplex controls such as duel pumps or blowers.

They perform one or both of two distinct functions: duplexing and alternation. The duplexing function provides capacity for system peaking or above normal demand without having both motors running at all times. It also provides standby capacity for use when one of the motors is disabled.

The alternation function reverses the lead and lag mode for the two motors in a duplex system. Upon alternation the first motor becomes the lag motor and the second motor assumes the lead function. The alternation is usually programmed to occur at any time both motors come to rest. The alternation function equalizes wear on the two machines and extends the life of seals and bearings.

Duplex motor controllers consist of two motor starters in a common enclosure.

Class 83 is a non-combination duplex motor controller. Class 84 is a combination duplex motor controller with two separate disconnects or circuit breakers.

To learn more about the different Furnas / Siemens products we offer or to place an order, contact State-Electric today.

Control Panel Fabrication Information