Electrical
Power Rating
Specify the required power by calculating secondary voltage multiplied by current. ex. 10 kVA. QT&E supports power ranges from:
1 VA - 1 kVA
1 kVA - 100 kVA
100 kVA - 2 MVA
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
400 Hz - 20 kHz
Phases
Choose between single-phase or three-phase configurations to match your application requirements; QT&E designs for both types. ex. 3PH.
Single-phase
Three-phase
Two-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.
1 V up to 600 V (up to 1.5 MVA)
600V up to 240 kV
(current or power rating needed along with voltage)
Isolation
Specify isolation requirements to ensure safety and signal integrity. ex. 4 kV isolation voltage. QT&E supports:
5 kV standard
5 kV up to 200 kV (custom)
Inrush
Detail any limitations on inrush current for your application; QT&E designs transformers with low inrush or soft-start options. ex. 5x full-load current for 10 milliseconds
Impedance
State the desired impedance to control voltage regulation and fault currents; QT&E provides custom designs to meet specific impedance values. ex. 4% (typical range: 2% to 8%)
K-rating
Specify a K-factor to handle harmonic loads. ex. K-13 (designed for harmonic loads in data centers). QT&E supports:
K-1 (standard)
K-4, K-13, K-20 for data centers and other sensitive applications
Short-circuit strength
Define the fault tolerance requirements; QT&E designs transformers to withstand high fault currents up to 100 kA. ex. Withstands 25 kA for 1 second
Efficiency Standard
Choose an efficiency standard (e.g., DOE 2016, NEMA Premium); QT&E ensures compliance with the highest energy efficiency benchmarks. ex. NEMA TP-1 or DOE 2016 Compliant
Noise suppression
Indicate the need for minimizing audible or electrical noise; QT&E incorporates low-noise laminations and shielding for sensitive environments. ex. 40 dB attenuation at 1 kHz
Ground loop elimination
State requirements for reducing ground loops in your system; QT&E designs with specialized grounding and isolation techniques. ex. Floating secondary with ground shield
Shielding
Specify electromagnetic or electrostatic shielding to prevent interference; QT&E offers designs with custom shielding options. ex. Faraday shield with 90% attenuation
Low Leakage Current
Define acceptable leakage current levels for safety or regulatory compliance; QT&E produces designs with minimized leakage current. ex. < 300 μA
Phase Angle Control
Indicate if phase-angle adjustments are needed for precise control; QT&E designs transformers optimized for phase control applications. ex. ±5° phase shift between primary and secondary
Harmonic Mitigation
Specify harmonic reduction needs to improve power quality; QT&E provides designs with specialized cores and K-rated transformers. ex. Reduces THD to <5%
Load Balancing
Describe requirements for balancing loads across phases; QT&E offers solutions to improve phase balance in single- or three-phase systems. ex. ±3% balance between phases
Voltage Regulation
Indicate tolerance for voltage fluctuations; QT&E ensures precise regulation through advanced winding and core designs. ex. ±1% under varying loads
DC Ripple Management
Define your tolerance for DC ripple in rectified outputs; QT&E designs for low ripple with advanced filtering. ex. Ripple voltage <1% of DC output
Pulse Shape Fidelity
Specify the need for high-fidelity pulse shaping in applications like power supplies or amplifiers; QT&E delivers precise waveform reproduction. ex. Rise time <50 nanoseconds with minimal overshoot
Fast Rise Times
Detail the requirement for rapid voltage or current transitions; QT&E provides solutions optimized for high-speed applications. ex. 10 microseconds from 10% to 90% of final value
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
Seismic Kits
Indicate if seismic bracing is needed to meet building codes in earthquake-prone areas. ex. Designed for Zone 4 seismic compliance
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
Cooling Method
Specify the cooling method required, such as natural convection, forced air, or liquid cooling, based on operating environment and power density. ex. Forced air cooling with fans or Liquid-cooled system
Voltage Tap Changers
Specify if adjustable voltage taps are needed to fine-tune output voltage under varying input conditions. ex. voltage tap changer for ±5% taps on primary winding in 2.5% increments
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
