Eaton Cutler-Hammer RMS 510 Instructions Manual

Also see for Cutler-Hammer Digitrip RMS 510: Instructions Instructional Leaflet Instruction leaflet

I.L. 29-885BPage 2The Digitrip RMS 510 Trip Unit is completely self-con-tained and when the circuit breaker is closed, requires noexternal control power to operate its protection sys-tems. It operates from current signal levels and controlpower derived through current sensors integrallymounted in the circuit breaker.Note*: RMS Digitrip Type LI, LS, and LSI trip unitscan be applied on 3-pole or 4-pole circuit breakersfor protection of the neutral circuit, IF the circuitbreaker is wired and MARKED for NEUTRAL PRO-TECTION. Refer to the National Electric Code forappropriate application of 4-pole breakers.The Digitrip RMS 510 Trip Unit is available in six differenttypes. Each trip unit may be equipped with a maximum offive phase and two ground (time-current) adjustments tomeet specific application requirements. The types of pro-tection available for each model include the following,which are illustrated in Figures 2.1 through 2.6:Types1.2 InformationLight Emitting Diodes (LED's) on the face of the trip unitlight “Red” to indicate the reason for an automatic tripoperation. The battery in the rating plug maintains thereason for trip indication following an automatic trip oper-ation, until the “TRIP RESET” button is pushed.The “Green” LED in the lower right corner “blinks” to indi-cate the trip unit is operating normally. The battery in therating plug is “OK” if the LED lights “Green” when the“battery check” button next to it is pushed. (SeeSection 6.).Note: The Digitrip RMS 510 provides all of its protec-tion functions regardless of the status of the battery.The battery serves only to maintain the indication ofthe reason for automatic trip.Refer toFigureProtectionLong Time/InstantaneousLong Time/Short TimeLong Time/Short Time/InstantaneousLong Time/Instantaneous/GroundLong Time/Short Time/GroundLong Time/Short Time/Instantaneous/GroundLI* 2.1LS* 2.2LSI* 2.3LIG 2.4LSG 2.5LSIG 2.6Fig. 1 Digitrip RMS 510 Trip Unit Model LSIG with Rating PlugEffective May 1997