Ansi Device Numbers
Quick search ANSI standard device numbers and their definition.
Trip Unit TCC Calculator
Generate test currents and generic trip times for LSIG trip units, includes tolerance for pickup and time values.
Browse common electrical symbols or search dynamically by name.
Insulation Resistance Values
Correct insulation resistance (IR) test results to 20°C or 40°C and lookup recommended values.
Metric Unit Converter
Convert between common test values such as Mega to Kilo and Base to Micro
Find FLA for electric motors or convert between Horsepower and Watts
Breaker MVA Calculator
Find MVA rating of a circuit breaker using nameplate ratings.
Ohm's Law Calculator
Calculate the relationship between voltage, current, and resistance or the relationship between power, voltage, and current.
Percent Error Calculator
Calculate percent error with calibrated and actual results.
Power Factor Calulations
Calculate power factor for single- and three-phase circuits and find correction capacitor.
Power Triangle Calculator
Find PF, VAR, W and VA with any two known quantities or review power triangle formulas.
Relay Trip Curves IEC/IEEE
Calculate the protection trip time (TOC/IDMT) according to IEC 60255 and IEEE C37.112-1996 protection curves.
Relay Loss of Excitation
Calculate useful values for testing GE & SEL generator protection relays.
Terms and Definitions
A complete library of terms related to electrical testing, with dynamic search.
Bolt Torque Values
Look up the recommended torque value for various types and grades of U.S. standard fasteners.
Get recommended test values, find TTR and load currents for single- and three-phase transformers.
Voltage Drop Calculator
Estimate the voltage drop of an electric circuit based on the wire size, distance, and anticipated load current.
Wire Size Calculator
Calculate the appropriate low-voltage wire size based on NEC Article 310.15
Distraction free testing environment.
Review past exam scores and get stats on your progression.
Fall of Potential
Electronic form for saving fall of potential test data.
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