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HOME    |    ABOUT    |    MARKETS    |    PRODUCTS    |    SUPPORT    |    CONTACT US (C) Copyright CopecoProducts 2011 Power Quality Solutions - FAQs 3. What is the difference between SCR/SCR systems and SCR/DIODE systems? SCR/SCR systems use SCR/SCR switching elements that enable controlling both sides of the waveform. All new systems are SCR/SCR systems, in the past Elspec used SCR/DIODE components for switching, Elspec still holds stock of SCR/DIODE components to support these systems. The easiest way to know if a system is a SCR/SCR or SCR/DIODE system is by looking at the firing connectors at the controller or the SWM in SCR/SCR there are 26 pins and in SCR/DIODE there are 20 pins.     HOME    |    ABOUT    |    MARKETS    |    PRODUCTS    |    SUPPORT    |    CONTACT US