Macromatic Industrial Controls KnowledgeBase & Blog

Replacing a Square D (Schneider) 8430MPS or 8430MPD Phase Monitor Relay

Thursday: November 15, 2018 : Three-Phase Monitor Relays

Issue: Schneider Electric (Square D) has obsoleted their complete line of 8430 MPS plug-in & MPD surface-mount phase monitor relays. I see Macromatic has several products I could use to replace the Square D products. Are there any special issues to address? Solution/Resolution: The following are the steps required to replace an obsolete Square D product with one from Macromatic


Replacement of Obsolete SS-4 Series Time Delay Relays

Wednesday: November 14, 2018 : Time Delay Relays

Issue: How do I convert from an obsolete SS-4 product with a spade base socket to one with an octal base socket? Solution/Resolution: The Macromatic SS-4 spade base products were obsoleted on August 1, 2010. If you have an application that uses an SS-4 product and need a replacement, you have two options: (a) switch


TE Connectivity Obsoleting Voltage Sensor Relays

Wednesday: August 29, 2018 : Blog

TE Connectivity is obsoleting their line of plug-in voltage sensor relays (the old Potter & Brumfield brand products). 


Macromatic earns Fastest Growing Firms Award

Friday: July 20, 2018 : Blog

Macromatic earns Fastest Growing Firms award from Milwaukee Business Journal. 


Maximum Voltage for Monitored Current

Tuesday: July 17, 2018 : Current Sensing Relays

Issue: On any of your current sensing relays, is there a maximum voltage level for the current being monitored? 


Macromatic Reintroduces the COKP Series Plug-in Current Sensing Relay

Monday: July 16, 2018 : Blog

Macomatic redesigned the COKP Series with new technology and it is now available. The COKP Series offers: adjustable pick-up current, adjustable drop-out current and adjustable time delay on relay energization.  


Macromatic’s CAP Series Current Sensing Relays are direct replacement for Crouzet

Friday: July 13, 2018 : Blog

Macromatic’s new CAP Series Current Sensing Relays are a direct replacement for both the LIRT & DIRT Series from Crouzet.


Short Circuit Current Ratings (SCCR) of Three-Phase Monitor Relays

Wednesday: May 2, 2018 : Three-Phase Monitor Relays

Does my Phase Monitor Relay require a Short Circuit Rating?


What happens when a time delay relay trigger is closed before voltage is applied?

Tuesday: March 13, 2018 : Time Delay Relays

Issue: I am using a time delay relay with a triggered function. My trigger switch will be closed before I apply voltage to the time delay relay. Will this work? Solution/Resolution: In a typical application with a triggered time delay relay, voltage is first applied to the timer, then the trigger is applied to begin the function. Some applications, however, require the trigger to be closed before voltage is applied. Most Macromatic time delay relays will recognize the trigger when applied prior to the application of voltage, however, some will not.


Using DPDT Cross-Wired Alternating Relays with HIGH-LOW Float Switches

Tuesday: January 16, 2018 : Alternating Relays


I have two float switches and two pumps in my application: a HIGH float switch to pump the water down and prevent an overflow of the tank, and a LOW float switch to turn the pump off and prevent the tank from being emptied & burning out the pump. 


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