Legacy network protectors

Network protector solutions

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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G-52-E replacement breaker product aid Fundamentals of network protectors

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Overview Technical Resources Support

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 and transformer monitoring 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.

C-52-D and G-52-E roll-in replacement

Eaton’s C-52-D and G-52-E are roll-in replacements that consists of a CM52 breaker that fits into an existing CMD or GE MG8 enclosures without modification. This roll-in is a direct replacement for any CMD network protector up to 3000A and GE MG8 Network Protectors up to 1875A.

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 C57.12.44
IEEE Standard for Secondary Network Transformers Subway and Vault Types (Liquid and Immersed)-Requirements	IEEE Std C57.12.40

Enclosure

1/4“ Copper bearing steel, 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/TRTL

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864-330-2460 or 864-330-2461

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Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.