Simple Circuit Builder vs Electrical Protection Calci

Description This is the BEST app to learn about Resistors and Circuit Resistance (Equivalent Resistance). This virtual lab provides an excellent environment for anyone who is interested in understanding series and parallel resistors, learning how to measure voltages across resistors, current through series and parallel circuits and solving simple circuits. Features - VERY SIMPLE and EASY TO USE, with up to eight component sections. - Component sections can easily be configured from five different types. - VIRTUAL "Hands On" experience using volt and amp meters. - Resistor values can easily be changed with a picker, keypad or using randomize button. - Circuit voltage can easily be changed from 1 to 1000 volts with a picker or a keypad. - The "Basics" screen make this app unique for the simplicity and speed of seeing the effects of "Opens" (resistor component with infinite resistance) and "Shorts" (resistor component with zero resistance). - FREE and NO ADVERTISEMENTS. - The circuit is always "LIVE" and immediately shows voltage, current and circuit resistance with any changes made to the circuit.

Electrical Protection Calculator is the professional, all-in-one commissioning companion for substation testing engineers, protection & control (P&C) specialists, and electrical engineering technicians. Easily calculate secondary injection test currents, plot operating curves, and verify trip boundaries across 6 world-leading protective relay manufacturers with authentic protection philosophies. KEY FEATURES: • Single-Phase & Three-Phase Pickup Tests: Simultaneously view 3-Phase pickup and Single-Phase pickup with automatic ×sqrt(3) zero-sequence filter compensation. • Benchmark Transformer Presets: Load substation benchmarks in one tap: - 25 MVA 132/33 kV Dyn11 - 50 MVA 220/66 kV YNd11 - 100 MVA 400/132 kV Yy0 - 16 MVA 66/11 kV Dyn1 • IDMT Overcurrent & Earth Fault Curve Calculator (51/51N): IEC 60255 & IEEE curve timing calculations (Standard Inverse, Very Inverse, Extremely Inverse, Long-Time Inverse, and Definite Time). • Relay Faceplate OCR Scanner: Extract nameplate text and CT ratings using camera OCR directly on site. • Professional PDF Commissioning Reports: Generate formatted test reports complete with settings, calculated thresholds, and test points. Share directly via Email, WhatsApp, or cloud storage. • Offline & Fast: Works 100% offline in remote substations and switchyards with built-in test history storage. SUPPORTED RELAY FAMILIES (87G & 87T): 1. MiCOM Series (P34x Generator / P64x & P63x Transformer): Dual-slope percentage bias differential with average restraint (|I1| + |I2|) / 2. 2. ABB / Hitachi Energy Relion® (REG670 GENPDIF / RET670 TRFPDIF): 3-Section percentage restraint characteristic + instantaneous unrestrained high-set (IdUnre). 3. GE Multilin Series (745 / G60 / T60 / UR Series): Dual-slope, dual-breakpoint percentage differential with tap scaling. 4. SEL Series (SEL-387 / SEL-787 / SEL-300G / SEL-487): Dual-slope percentage restraint with knee-point IRS1, SLP1, SLP2, and U87P high-set. 5. Siemens SIPROTEC Series (7UT6 / 7UM6 / 7UT8): Authentic Siemens Scalar-Sum Restraint: Irest = |I1| + |I2| (strictly NOT divided by 2). 6. Beckwith Electric Series (M-3425A / M-3311A / M-3310): Dual-slope percentage differential with programmable breakpoint. Empower your substation commissioning with precise, manufacturer-grade protection calculations! Electrical Protection Calculator is the professional, all-in-one commissioning companion for substation testing engineers, protection & control (P&C) specialists, and electrical engineering technicians.