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 - 500 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
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
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
Specify the maximum allowable current to safeguard the SCR assembly and connected equipment from overcurrent conditions. QT&E provides solutions with integrated current-limiting functionality. ex. 150A peak with automatic recovery.
Power factor correction
Define the power factor improvement needed to optimize energy efficiency and reduce reactive power in your system. ex. ≥ 0.98 for a 10 kW system.
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
Many SCR assemblies allow remote or programmable control for voltage and current settings, ideal for automated or precision applications.
EMI/RFI Suppression
Advanced designs include filters to minimize electromagnetic interference and ensure compatibility with sensitive electronic equipment.
