Technical Tips
Control, Timing & Solid State Relays
September 2017
Using an interposing relay with a CA6 Contactor
Can an interposing relay be used with CA6 Electronic coil contactors?
January 2016
Contactors & Relays: Safety vs. General Purpose
What are the distinctions between CAS7 Safety Contactors and CSS7 Relays versus General Purpose CA7 Contactors and CS7 Relays? Does the CA7/CA6 Contactor or CS7 Relay have safety ratings?
Whitepaper
June 2014
Short Circuit Current Ratings (SCCR) and Control Circuits
Do the components in a control circuit have a short circuit current rating? UL and NEC rules define which components in a control panel require a short circuit current rating.
March 2013
How to reduce the size of a DC Power supply
The use of electronic DC contactors and control relays can reduce the size requirements of DC power supplies. The CRI7E external electronic interface is another way to reduce DC power requirements.
January 2011
Preventing Coil Burn Out
About 85% of all coil burn-outs are caused by low voltage resulting from insufficient control power. Field personnel can identify possible causes and prevent the death of contactor and/or relay coils.
Whitepaper
February 2009
Selecting Surge Suppressors
What is the purpose of a surge suppressor? What are the differences between the types of surge suppressors?
Whitepaper
November 2007
General purpose relays application guide
Relays are a significant element in industrial processes. Millions of relays operate in the world as an interface between control circuits and electrical load. This paper dicusses specifically the Relpol brand of general purpose relays.
Whitepaper
July 2007
Auxiliary Contact Block Performance and Selection
A combination of many factors can affect the dependability, life expectancy, and suitability of an auxiliary contact block in any given application. Understanding the most important of those factors can help you select the best switch for your needs.
Whitepaper