Electrical
Power Rating
Specify the required power by calculating secondary voltage multiplied by current. ex. 10 kW. QT&E supports power ranges from:
50 W - 1 kW
1 kW - 100 kW
100 kW - 2 MW
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.
120 V - 5 kV
up to 350 kVDC
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)
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
Voltage Regulation
Indicate tolerance for voltage fluctuations; QT&E ensures precise regulation through advanced winding and core designs. ex. ±1% under varying loads
Current limiting
Define the maximum allowable current to protect your DC power supply and connected equipment from overcurrent conditions. QT&E offers solutions with precise current limiting and fault protection features. ex. Current Limit: 100A peak with 10 ms response time
Power factor correction
Specify the required power factor improvement for your DC power supply to optimize energy efficiency and reduce reactive power demand. QT&E designs transformers and systems with integrated PFC capabilities. ex. ≥ 0.95 with active PFC for a 10 kW DC power supply.
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
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
Programmable control
Specify the required programmability features for your DC power supply, such as adjustable voltage/current settings, remote control, or monitoring capabilities, to meet application flexibility and control needs. QT&E integrates advanced programmable control options for precise system management. ex. Programmable Voltage Range: 0-300V with 0.1V resolution
EMI/RFI suppression
Define the level of electromagnetic and radio frequency interference suppression needed to ensure compliance with regulatory standards and prevent interference with sensitive equipment. QT&E offers transformers and filters tailored to minimize EMI/RFI emissions. ex. EMI Suppression: 50 dB attenuation at 150 kHz to 1 MHz
