Loading
Back to
View All
  • Products
    • ALL PRODUCTS
      • Contactors
      • Overload Protection
      • Starters + Enclosed Product
      • Motor Controllers + MCCBs
      • Softstarters
      • Circuit Protection
      • Disconnect Switches
      • Rotary Cam Switches
      • Control + Timing Relays
      • Pilot Devices
      • Signaling Devices
      • Terminals
      • Power Supplies
    • Custom Control Panels
      • Capabilities
      • Combination Starters
      • Explosion Proof
      • Multi-Speed and Reduced Voltage
  • Library
    • LIBRARY
      • Product Catalog
      • Literature
      • Cross Reference
      • Technical Tips & FAQs
      • CAD Drawings
      • Wiring Diagrams
    • APPROVALS
      • UL/CSA Documents
      • CE-DOC
      • Atex
      • CCC
      • RCM/TUV/ABS/RINA
      • ISO9001
      • SUVA Certificates
      • Functional Safety Data
      • Environmental Compliance
  • Company
    • COMPANY
      • About Sprecher + Schuh
      • Contact Us
      • Industries Served
      • Success Stories
      • Terms & Conditions
      • Privacy Policy
      • Technical Support
      • International
  • Sales
    • SALES
      • Find a Reseller or Sales Rep
      • Become a Distributor
      • B2B Portal
    • CONTACT US
      • United States
      • Canada
      • International
  • Support
    • SUPPORT
      • Technical Support
      • Technical Tips & FAQs
      • Find a Reseller or Sales Rep
      • Contact Us
      • B2B Portal
Tech Tips
    • Contactors
    • Contactors
    • Overload Protection
    • Overload Protection
    • Starters & Enclosed Products
    • Starters & Enclosed Products
    • Motor Controllers & MCCBs
    • Motor Controllers & MCCBs
    • Softstarters
    • Softstarters
    • Circuit Protection
    • Circuit Protection
    • Disconnect Switches
    • Disconnect Switches
    • Rotary Cam Switches
    • Rotary Cam Switches
    • Control Relays & Timers
    • Control Relays & Timers
    • Pilot Devices
    • Pilot Devices
    • Signaling Solutions
    • Signaling Solutions
    • Terminal Blocks
    • Terminal Blocks
    • Power Supplies
    • Power Supplies
    • Electrical Industry Codes
    • Electrical Industry Codes
 

PTC Thermistor Protection Using CEP7-EPT Side Mount Module

 
 
 
 

Question:

What are the differences between the CEP7-EPT and the old RT3/RT7 for thermistor protection?

Answer:

The RT3 and RT7 were stand-alone devices. The CEP7-EPT must be used in tandem with a CEP7-EE__ Overload Relay. Other than that, the same features can be found on both, but installation is the question.

Model Features CEP7(S)-EE
+ CEP7-EPT
RT7-E1 RT7-E2
Thermal overload protection • • •
Short-circuit/open-circuit protection in the sensor measuring circuit
• • •
Trip indication (Red LED) •
•
•
Automatic reset •
•
•
Manual reset •    
Remote reset (external button) •   •
Storage of switching status in memory     •
Test button •   •
Power-on indication (Green LED) • • •

Often installed in the motor stator windings, Positive Temperature Coefficient (PTC) resistors –known as thermistors - increase their resistance with an increase in temperature. This increase in resistance alerts equipment of a rise in motor temperature.

The characteristic comparison between the two products (RT3/RT7 vs. CEP7-EPT) shows application similarity in the technical information and rated values. CEP7-EPT is a suitable application replacement item for the RT3/RT7 since this side module runs independently from the overload portion – and you can just have PTC protection without having any current flowing through the CEP7.

For additional information please contact your nearest authorized distributor, sales representative, or call our customer service or technical support lines.

Sprecher & Schuh Series CEP7-EPT Side Mount Module

Related Links

E-Catalog
Contactor Performance White Paper

Follow us

  • Facebook logo
  • LinkedIn logo

Copyright © 2022 Sprecher + Schuh All Rights Reserved.

Legal Notices | Privacy & Cookies Policy

main logo