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Network protector solutions

Legacy network protectors

Eaton legacy-style network protectors include the CM22 and CMR6 live-front network protectors. Legacy CMD dead-front and GE network protectors can also be internally retrofitted with an advanced CM52 design when replacing them is not a feasible option.

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Advanced protection and control
Updated with advanced MPCV microprocessor-based relay
Asbestos free
Meet today’s material safety requirements
SCADA ready
Easy integration with VaultGard system

Core features

  • Eaton is the original manufacturer of these legacy designs
  • Served the industry for over 80 years
  • Updated to today’s protection and control standards

CM22 network protector

Eaton’s CM22 network protector is a live-front design that has been widely used in network systems since the 1930s and has undergone numerous improvements and revisions since its inception.

CMD network protector

Eaton's CMD network protector consists of special self-contained air power breaker units that represent upgraded personnel safety and increased equipment dependability in the art of network protector technology.

G52E roll-in replacement

Eaton’s G52E is a roll-in replacement that consists of a CM52 design breaker that fits into a GE MG8 enclosure. This roll-in is a direct replacement for a 1875A MG8 breaker and can have the NPARMS installed. The existing enclosure requires no modifications.
Specifications

Ratings

Maximum design voltage (V)
 600
  
Maximum continuous current rating (50/60Hz) (A)
 800 to 3500
  
Load break current, (50/60Hz) (A)
 800 to 3500
  
Sym interrupting rating (kA)
 Up to 60 where applicable
  
Withstand rating (kA)
 Up to 60 where applicable
  
Sym fault close and latch rating (kA)
 Up to 40 where applicable
  

Standards

IEEE Standard Requirements for Secondary Network Protectors
 IEEE Std C57.44-2014
  
IEEE Standard for Secondary Network Transformers Subway and Vault Types (Liquid and Immersed)-Requirements
 IEEE Std C57.40-2011
  

Enclosure

1/4“ Copper bearing steel, 316 stainless steel, NEMA 4 non-submersible 
    

Devices

Relay
 MPCV Sequence-Based Relay
  
Visual Indication
 Stacklight
  
Secondary Visual Disconnect
 VisoBlock
  
Wireless Communication
 RAD (Remote Access Device)
  
Remote Operation
 Pendant/RAD/VaultGard/HMI
  
Download Links
  • Eaton network protector recycling program
    This document answers questions about the network protector recycling program
    (PDF 392 KB , 21/12/2023)
  • G-52-E replacement breaker product aid
    This brochure describes how Eaton’s G-52-E direct roll-in replacement breaker for the MG8/9 enclosure has all of the advantages of the G-52-E breaker and fits securely inside the original enclosure, with no modifications required.
    (PDF 6 MB , 01/10/2010)
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