Eaton Digitrip RMS 510 Instruction Leaflet

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

8Instruction Leaflet I. L. 29-885DEffective August 2011Instructions for Digitrip RMS 510 Trip UnitEATON CORPORATION www.eaton.com1.2 Frame Rating, Sensor Rating (Where Applicable) andRating PlugsThe Frame Rating of a circuit breaker is the maximum RMS cur-rent it can carry continuously The maximum Short-Circuit CurrentRatings of the circuit breaker are usually related to the Frame Ratingas wellIt is often times desirable to be able to choose a current value (In),less than the full frame rating, to be the basis for the circuit break-er's protection functions, without affecting its short-circuit currentcapability For the Digitrip RMS 510 Trip Unit the maximum continu-ous current (In) is set by the Rating Plug (and/or Current Sensors,where applicable) - see Section 5 for specific instructions for yourcircuit breaker typeThe (Current) Sensor Rating (where applicable) is the maximumRMS current the circuit breaker can carry with the specified currentsensors installed The Sensor Rating can be the same or less thanthe Frame Rating, but not greaterThe Rating Plug (see Figure 9) fits into a special cavity to completethe Trip Unit (see Figure 2)Figure 9. Rating Plug.CAUTIONBEFORE YOU FIT THE RATING PLUG INTO THE TRIP UNIT, BE SURE TO CHECK THATTHE BREAKER TYPE AND FRAME RATING (OR SENSOR RATING IF APPLICABLE),MATCH THOSE PRINTED ON THE RATING PLUG COVER. INSTALLING A RATING PLUGTHAT DOES NOT MATCH THE BREAKER TYPE AND FRAME RATING (OR SENSORRATING, IF APPLICABLE), CAN PRODUCE SERIOUS MIS-COORDINATION AND/ORFAILURE OF THE PROTECTION SYSTEM.After installing the Rating Plug, press and release the "TRIP RESET"push-button to turn off any illuminated LEDs The purpose of therating plug is to set the value of In, the basis for the Trip Unit protec-tion function current settings (see Section 3 for details) Each circuitbreaker frame rating represents the maximum current it can carrycontinuously However for proper coordination of over-current pro-tection, it is often desirable to choose different levels of In for differ-ent circuit breakers of the same frame rating An assortment of rat-ing plugs with different In values is available for each breaker framerating (see circuit breaker instruction leaflet supplements listed inSection 5) to give the user flexibility to change the value of In with-out having to change the primary current sensors on the breakerBy changing the rating plug, the User can easily change the rangeof current protection settings without having to remove the circuitbreaker from its enclosureRating Plugis for TypeSPB CircuitBreakers OnlyRating Plugfor R-Frameand DSBreakersare SimilarValues for ShortDelay S1 and S2InstantaneousM1 and M2SettingsPull Tab toRemoveBatteryRating PlugRetentionScrew BatteryRemoval TabPolarityBattery- +PolarityMarksRating PlugIdentification"BatteryCheck"PushbuttonHingedCoverBattery "OK"if LED Lights"GREEN" when"Battery Check"Button isPushedFor example, if one expects a circuit to carry 600 A initially, but thenincrease to 1400 A in the future, one could initially install1600 A cables and a 1600 A breaker frame with the Trip Unit ratingplug whose In = 800 A Then later on when the additional load isready to come on line, the rating plug could be exchanged for onewith In = 1600 A, without having to remove the breaker from itsenclosure The available settings would give the following choices:Long Delay SettingIr = In x: 5 6 7 8 85 9 95 1 0Plug In =800 ALDPU Ir = : 400 480 560 640 680 720 760 800 APlug In = 1600 ALDPU Ir = : 800 960 1120 1280 1360 1440 1520 1600 Aotee:N Rating plugs from Digitrip models 500 / 600 / 700 / 800 CANNOT beused with model 510 Trip Units The connection pins are located in differentpositions, so one cannot accidentally use the incorrect type of plugRating Plugs for the Digitrip RMS 510 Trip Units are marked for, andmay be applied on both 50 and 60 Hz systemsRating plugs have two current ratings listed on their covers (seeFigure 9)