2
Instruction Leaflet
IL29C614F
Effective December 2011
Instructions for The Digitrip RMS 310 3-Pole and
4-Pole Trip Unit Installation and Operation with
K-Frame Series C Circuit Breakers
EATON CORPORATION
www.eaton.com
DEATH, SEVERE PERSONAL INJURY, OR SUB-
STANTIAL PROPERTY DAMAGE CAN RESULT
FROM CONTACT WITH ENERGIZED EQUIPMENT.
DO NOT ATTEMPT TO INSTALL OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER-
GIZED. ALWAYS VERIFY THAT NO VOLTAGE IS
PRESENT BEFORE PROCEEDING WITH THE TASK,
AND ALWAYS FOLLOW GENERALLY ACCEPTED
SAFETY PROCEDURES.
EATON IS NOT LIABLE FOR THE MISAPPLICATION
OR MISINSTALLATION OF ITS PRODUCTS.
The User is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of person-
nel and equipment as well as all general and local
health and safety laws, codes, and procedures.
The recommendations and information contained herein
are based on Eaton experience and judgment, but
should not be considered to be all-inclusive or covering
every application or circumstance which may arise.
If any questions arise, contact Eaton for further infor-
mation or instructions.
1.0 GENERAL INFORMATION
1.1 PROTECTION
The Digitrip RMS 310, illustrated in Figures
1a
, and
1b
,
is an electronic trip unit that incorporates a microproces-
sor-based custom application specific integrated circuit
design for use with Series C K-Frame Molded Case
Circuit Breakers.
The Digitrip RMS 310 provides true RMS current sens-
ing for proper correlation with thermal characteristics of
conductors and equipment. Interchangeable rating
plugs are provided to establish the continuous current
rating of each circuit breaker.
The Digitrip RMS 310 Trip Unit is completely self-con-
tained and when the circuit breaker is closed, requires no
external control power to operate its protection systems.
!
WARNING
