Electrical
Ground fault current
Specify the maximum expected ground fault current the transformer must handle during a fault condition. ex. 200A for 2 seconds
System voltage
Define the system's line-to-line voltage to ensure compatibility with the transformer’s rating. ex. 13.8 kV
Control neutral current
Indicate the maximum neutral current the transformer must accommodate during normal operation or unbalanced conditions. ex. 50A continuous neutral current
Zero phase sequence
Specify zero-sequence impedance values to control the flow of zero-sequence current and ensure proper fault performance. ex. Zero-sequence impedance: 5 ohms per phase
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. 3PH.
Single-phase
Three-phase
Two-phase
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
Seismic Kits
Indicate if seismic bracing is needed to meet building codes in earthquake-prone areas. ex. Designed for Zone 4 seismic compliance
