所有電氣文章
87V MAX數(shù)字萬(wàn)用表 vs 87V數(shù)字萬(wàn)用表
比較IP等級(jí)、電池壽命和其他功能，了解Fluke 87V MAX和87V數(shù)字萬(wàn)用表之間的區(qū)別在哪里。
What is true-RMS?
The need for true-RMS meters has grown as the possibility of non-sinusoidal waves in circuits has greatly increased in recent years. Some examples include variable speed motor drives, electronic ballasts, computers, HVAC, and solid-state environments.
The 7 Best Tools for Electricians in 2024
We recently asked electricians what they considered their top 5 essential tools—there were a few ties, so we’re sharing their top 7.
What is a diode?
A diode is a semiconductor device that essentially acts as a one-way switch for current.
What is Ohm’s Law?
Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.
What is duty cycle?
Duty cycle is the ratio of time a load or circuit is ON compared to the time the load or circuit is OFF.
Electrical testing safety - Preparing for absence of voltage testing
Placing electrical equipment or systems in an electrically-safe work condition might seem simple, but there are several factors to consider.
Part 2: Electrical testing safety
If you find a circuit that shows voltage when there should be none, be careful what you do next. Creating an arc is unsafe and could get you fired or much worse. Be safe. Determine whether the voltage is induced by nearby, energized cables or if it is being backfed from an unknown source.
