# Powerful Testing Tools. All in One Place.

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##### 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.

##### Digitrip GF Pickups

Find expected Ground Fault pickup values for most Digitrip RMS trip units.

##### Electrical Symbols

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

##### Motor Calculations

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.

##### Transformer Calculations

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

##### Tech Quiz

Distraction free testing environment.

##### My Progress

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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