Control Transformers

Control Transformers for Precise Voltage Regulation

Discover our high-performance control transformers, engineered to deliver stable voltage for sensitive control circuits and reliable operation in industrial and commercial applications.

Control transformers hero image by Quality Transformer & Electronics, Inc.

Configurable Options in our Control Transformers

Electrical

Power Rating

Specify the required power by calculating secondary voltage multiplied by current. ex. 2 kVA. QT&E supports power ranges from:

50 VA - 5 kVA

Frequency

Define the operating frequency of your system (e.g., 50 Hz, 60 Hz, or custom). ex. 60 Hz. QT&E supports frequencies from:

50 Hz or 60 Hz

Phases

Choose between single-phase or three-phase configurations to match your application requirements; QT&E designs for both types. ex. 1PH.

Single-phase

Inputs & Outputs

Indicate the number, voltage, and current ratings for primary and secondary windings; QT&E accommodates a wide range of configurations and load profiles. ex. Input: 480V, Output: 120/240V split-phase.

Up to 5,000 V in/out

Mechanical

Temperature Rise

Specify the allowable temperature rise above ambient for your application (measured in °C), typically based on insulation class or operational needs. ex. 80°C (standard for Class B).

Dimensions

Define the physical size constraints (height, width, depth) to fit your installation space. ex. H: 24 in, W: 18 in, D: 12 in

Terminal Configuration

Specify the type of terminals required, including material (e.g., copper or aluminum), plating, and configuration (e.g., screw, stud, or busbar) based on conductivity and installation needs. ex. Tin-plated copper busbars with 3/8-inch studs. Options include:

Copper buss bar
Silicon bronze hardware
Terminal strip
Ring-lug compatibility
Touch-safe configurations
Lexan covers

Enclosure

Indicate the required enclosure type based on environmental conditions, such as indoor, outdoor, or hazardous locations. ex. NEMA 1 (indoor use). Options include:

NEMA 1: Standard
NEMA 2
NEMA 3 + 3R: Protection from falling water.
NEMA 4 + 4X:
Water proof, fully enclosed.
NEMA 6

Circuit Protection

Specify integrated circuit protection needs, such as fuses or breakers, for overload and fault conditions. ex. Primary & Secondary circuit breakers. Options include:

Circuit breakers
Fuses

Emergency Off and Safety

Define any emergency stop or safety requirements, such as accessible shutoff switches or interlocks. ex. Red emergency-off push button on front panel

Notifications

Define any notification features required, such as indicator lights, alarms, or digital displays for system status. ex. Green (Power On), Red (Fault) indicator lights with an audible alarm for overload

Examples of Control Transformer Applications

2 kVA control transformer image

2 kVA Control Transformer

1-Phase · 50/60Hz · 380/400/415/440/480 Vrms in · 120 Vrms @ 1.67 Arms and 208 Vrms @ 8.65 Arms out
440 V control transformer

1,600 A Zigzag Transformer

440 V Control Transformer
92 VA control transform

92 VA Control Transformer

1-Phase · 60Hz · 24 Vrms in ·24 Vrms @ 8 Arms out · CE Mark, NRTL to UL 506

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