Eaton Digitrip RMS 310 User manual

Instructionsfor Digitrip RMS 310 Trip Unit For Usewith
R
- Frame Breakers
TABLE OF CONTENTS
Description Page
1.0 General Information..
..................... 1
1.1 Protection..
............................. 1
1.2 Testing..
.............................. .2
2.0 UL Listed Devices ....................... .2
3.0 Principleof Operation. ..................... 2
3.1 General..
.............................. .2
3.2 OverloadTrip ............................ 2
3.3 Short DelayhstantaneousTrip
.............. 2
3.4 Ground Fault Protection.
................... 3
4.0 ProtectionSettings
....................... 3
4.1 General
................................ 3
4.2 Short Delay Pick
- up Settings ................ 3
4.3 Short DelayTime Settings
.................. 3
4.4 InstantaneousPick
- up ..................... 3
4.5 Ground Fault Pick
- up Setting ............... 3
4.6 Ground FaultTime Setting
................. 3
6.0 Frame Ratingsand Ratings Plugs
............ 5
7.0 Reference.. ............................ .5
7.1 Digitrip RMSTrip Assemblies. ............... 5
7.2 R - Frame MoldedCase Circuit
Breakers
............................. .5
5.0 Testing ................................ .5
a WARNING
DO NOT AlTEMPTTO INSTALL OR PERFORM MAIN -
TENANCE ON EQUIPMENT WHILE IT IS ENERGIZED.
DEATH, SEVERE PERSONAL INJURY,
OR SUBSTAN -
TIAL PROPERTY DAMAGE CAN RESULT FROM CON -
TACT WITH ENERGIZED EQUIPMENT. ALWAYS
VERIFY THAT NO VOLTAGE
IS PRESENT BEFORE
PROCEEDING WITH THE TASK, AND ALWAYS FOL
-
LOW GENERALLY ACCEPTED SAFETY PROCE -
DURES.
THE CUTLER-HAMMER
IS NOT LIABLE
OF ITS PRODUCTS.
The user is cautioned to observe all recommendations,
warnings,andcautions relatingto the safety of personnel
andequipmentas well as all general and local healthand
safety laws, codes, and procedures.
FOR THE MISAPPLICATION OR MISINSTALLATION
The recommendationsand informationcontained herein
are based on Cutler
- Hammerexperienceandjudgement,
but should not be consideredto be all-inclusiveor cover
-
ing every application or circumstancewhich may arise. If
any questions arise, contact Cutler
- Hammerfor further
informationor instructions.
1 .O GENERAL INFORMATION
1.1 Protection
The Digitrip RMS 31 0, illustratedin Figure 1, is an elec -
tronic trip unit that incorporatesa microprocessor - based
custom application specific integratedcircuit design for
use with R
- FrameMolded Case Circuit Breakers.
Fig. 1 Digitrip RMS 310 Trip Unitfor use withR - Frame
CircuitBreakers
The Digitrip RMS 310 providestrue RMScurrent sensing
for proper correlation with thermal characteristics of con
-
ductorsand equipment. Interchangeablerating plugs are
providedto establishthe continuous current rating of
each circuit breaker.
Effective February 2006 Supersedes I.L. 29C883C dated July 2003
I.L. 29C883E
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The Digitrip RMS 31 0 Trip Unit is completely self - con -
tained and when the circuit breakerisclosed, requiresno
external control power to operate its protectionsystems.
It operatesfrom current signal levels and control power
derivedthrough current sensors integrallymounted inthe
circuit breake
r.
Digitrip RMS310 Trip Units are suitablefor 50/60 Hz AC
applications only.
The Digitrip
RMS 31 0 Trip Unit is available in 4 different
types. Eachtrip unit contains a fixed long delaytime func
-
tion (adjusted by changing the rating plug), and may be
equippedwith a maximumof two phase and two ground
(time
- current)adjustmentsto meet specific application
requirements.The types of adjustmentsavailable for
each model includethe following, which are illustrated in
Figures3.1 through 3.4.
Adjustment Refer to
Figure
1) Short Delay Pick - up RESxxxxLS 3.1
2) Short Delay (Inst.) RESxxxxLSI 3.2
Pick-up1ShortDelay
Time
3) Short Delay Pick
- up/ RESxxxxLSG 3.3
Ground Fault Pick
- up/
Ground FaultTime
4) Short Delay (Inst.) RESxxxxLSlG 3.4
Pick-up1ShortDelay
TimeIGround Fault
Time
1.2Testing
Test points (Figs. 3.1 through 3.4) are providedfor func -
tionalfield testing of the trip unit when connectedto a test
kit (Catalog
No. STK2).
2.0 UL LISTED DEVICES
The Digitrip RMS 31 0 Trip Unit is listed in accordance
with UnderwritersLaboratories, Inc. Standard UL489,
under file E7819and satisfies the applicable require
-
ments of the International ElectrotechnicalCommission
(IEC) recommendationsfor moldedcase circuit breakers.
3.0 PRINCIPLE OF OPERATION
Inopen air at 40”C,an R - Framecircuit breakerwith a
Digitrip RMS310 Trip Unit installedwill carry continu
-
ously up to 1600,2000,or 2500 ampereswithout
exceedinga 50°Crise at the terminals.The calibrationof
the trip unit is insensitiveto ambient temperatures over a
range of
- 20” to +55”C. However,the trip unit contains
thermal temperature protective circuitry that initiates a
trip operationfor self
- protection if the internalambient
temperature at the printed circuit board (PCB) reaches
approximately 100°C.This may occur for open
- air tem -
peraturesabove 40°Cwith circuit breakercurrents near
full load.
For ambient conditions above 40°C and where the maxi
-
mum ampere rating plug has been installed,derating of
the circuit breakerframe should be considered to avoid
exceedinga safe terminal temperature operating range.
Consult Cutler
- Hammerfor recommendations.
3.1 General
The Digitrip RMS 31 0 Trip Unit providesa tripping signal
to the flux transfer shunt trip when current and time delay
settings are exceeded. This is accomplished by employ
-
ing the Cutler - Hammercustom designed integratedcir -
cuit SyreTMchip, which includesa microcomputerto
perform its numeric and logicfunctions.
Inthe Digitrip
RMS 31 0 Trip Unit,all requiredsensingand
tripping powerto operate its protectionfunction isderived
from the current sensors in the circuit breaker.The sec
-
ondary currents from these sensors providethe correct
input informationfor the protectionfunctions, as well as
tripping power, whenever the circuit breaker is carrying
current.These current signals develop voltages across
the appropriate calibrating resistors.
The microcomputer,in cyclic fashion, repeatedlyscans
the voltage values across each calibrating resistor and
entersthese values into memory.These data are usedto
calculatetrue
RMS currentvalues, which are then
repeatedlycomparedwith the protectionfunctionsettings
and other operatingdata stored in memory.The software
programthen determines whether to initiate protection
functions, includingtripping the breakerthrough the flux
transfer shunt trip device inthe circuit breaker.
A green status light indicates the operational status of
the trip unit. If the load current through the circuit break-
of a properly functioning trip unit. If the status light is not
blinking, the current through the breaker may be less
than 20% of the maximum current rating of the trip unit
If the current exceeds 20% and the status light is not
blinking, use the STK2 test kit to investigate. IF THE
STATUS LIGHT IS ON STEADY, IT INDICATES A
Effective February 2006
I.L. 29C883E
Page 2
TRIP IS PENDING.
er exceeds approximately 20% of the maximum current
rating of the tirp unit, the status light will blink on and off
once each second. A blinking status light is an indication
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I.L. 29C883E
l²t rampfunction for trip unitswith catalog numbersuf -
fixes LS and LSG. A flat responsetime delay action is
provided by trip unitswith catalog numbersuffixes
LSI
and LSIG unlessthe instantaneous (I) setting is selected.
3.4 Ground Fault Protection: When selected, ground
fault pickupand time delay settings shown in Table
1 - 2
allow selectiveground fault coordinationwith other circuit
protectiondevices.
An optionalAutomatic Trip Relay(ATR) may be furnished
with the circuit breakerand is mounted underneaththe
trip unit as illustratedin Figure
4. The ATR providesa
contact closure when a ground fault trip occurs.The con
-
nections requiredare shown in I.L. 29C714.
4.0 PROTECTION SETTINGS
4.1 General
Priorto placing any circuit breaker in operation, each trip
unit protectionsetting must be set to the values specified
by the engineer responsiblefor the installation.The avail
-
able settings along with the effect of changing the set -
tings are illustrated in Figures 2.1 to 2.4.
The installed rating plug establishesthe maximumcon -
tinuous current rating (I,) of the circuit breaker. Short
delaycurrent settings are defined in multiplesof
I,. Over -
ride is set at
17,500A.
One to four time and pick - up adjustment settings are
availabledependingonthe particulartrip unit purchased.
An eight position rotary switch is providedfor each set
-
ting. The rotary switch is adjusted using a small flatblade
screwdriver.The selectedsettingfor eachadjustmentwill
Digitrip RMS 31 0 Trip Units.Settings 7 and 8 are
available on 2500A styles.
4.3 Short DelayTime Settings
For catalog numbers RESl6OOLS, RES2000LS,
RES2500LS, RESlGOOLSG, RES2000LSG, and
RES2500LSG, the short time delay is an I2trampconfig -
urationwith the actual time delay a function if the trip cur -
rent involved .
For catalog numbers RES16OOLSI, RES2000LS1,
RES2500LS1, RES1600LSIG, RES2000LSIG, and
RES2500LSIG,
the short time delay is a flat response.
Four settings
(I, 0.1, 0.2, 0.3 second) are available(see
Figure
2.2). The ‘‘1” setting gives a trip responsewith no
intentionaldelay (Instantaneous).
4.4 Instantaneous Pickup Setting
For catalog numbers RES16OOLSI, RES2000LS1,
RES2500LS1, RES1600LSIG, RES2000LSIG, and
RES2500LSIG, InstantaneousPickup is achievedby set -
ting Short DelayTime to “I” (Instantaneous.)Short Delay
Pickup(see paragraph
4.2) then becomes Instantaneous
Pickup.
4.5 Ground Fault Pick - up Setting
Eight settings letteredA through K (there is no setting
marked
“G”) are available (see Figure 2.3) and corre -
spond to the fixed ampere values listed on the trip unit
nameplateand in Table
1.2.
Note:These ampere values are alwaysthe same no
matter what rating plug is installed in the circuit
breaker.
Available on Catalog Nos. RESlGOOLSG, RES2000LSG,
RES2500LSG, RESl600LSIG, RES2000LSIG, and
RES2500LSIG.
4.6 Ground FaultTime Settings
The ground fault time delay is a flat responsewith four
settings
(I, 0.15, 0.3, 0.5 second) available(Figure 2 - 4).
The I setting gives a trip responsewith no intentional
delay (Instantaneous).This option is available on Catalog
Nos. RESlGOOLSG, RES2000LSG, RES2500LSG,
RES1600LSIG, RES2000LSIG, and RES2500LSIG.
Effective February 2006
3.2 OverloadTrip: Inaccordancewith standards
requirements,the trip unit initiates a trip of the circuit
breakerwithin two hoursfor an overloadof 135percent,
and will trip in less time for higheroverloadcurrents.
A “Thermal Memory” effect prevents the breakerfrom
being re
- energized immediatelyafter an overloadtrip. A
“cooling off” period of up to
5 minutes is required,which
allowstime for cabling to cool off.
3.3 Short Delay/Instantaneous Trip: For short circuit
appear in a small rectangularwindow in the trip unit
above the switch.
4.2 Short Delay Pick - upSetting
Sevensettings are availablethat rangefrom 2 to 8 (I,) as
shown in Figure
2.1. This feature is includedon all
a CAUTION
LACK OF ILLUMINATION OF THE STATUS
LED DOES NOT INDICATE THE TERMINALS
OF THE BREAKER ARE DE-ENERGIZED
conditions that exceed the short delay pick-up settings,
the trip unit initiates a trip after a delay prescribed by the
Page 3
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I
Available Settings
2. 3, 4, 5, 6, 7, 8 in Multiples
of Rating Plug Amperes
In
(7 and 8 settings
not available on 2500A Trip Units)
Fig. 2 - 1
Short Delayhstantaneous Pick - UpSettings
Ground
Fault
Pick
- up
I
Available Settings
A.B.C,D.E.F.H.K
Specific Amperes
Given inTable
1-2
Fig. 2 - 3 GroundFault Pick - UpSettings
Short Delay
Time
r;l Sec
Available Settings
I, .l, .2, .3 Seconds
with Flat Response
I
I
Fig. 2 - 2 Short Delay TimeSettings
I I
Ground Fault
Time
Available Settings
1. 0.15, 0.3, 0.5 Seconds
with Flat Response
Fig. 2 - 4 GroundFault TimeSettings
Effective February 2006
I.L. 29C883E
Page 4
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I.L. 29C883E
5.0 TESTING
A test receptacleis built into each trip unit to allow use of
the STK2Test Kit.The Test Kit performs a test of the
Long Delay, Short Delayand Ground Faultfunctions.
6.0 FRAME RATINGSAND RATING PLUGS
The Frame Rating of a circuit breaker is the maximum
RMS current it can carry continuously.The maximum
Short
- circuit Current Ratingsof the circuit breakerare
usually relatedto the Frame Ratingas well.
It is often desirableto be able to choose a current value
(I,), less than the full frame rating,to be the basis for the
coordination of the circuit breaker's protectionfunctions,
withoutaffectingitsshort - circuit currentcapability. Forthe
Digitrip31
0 Trip Unitthis is implementedbychanging the
Rating Plug.
For Adjustable Rating Plugs,Table 1 - 2,the primary cur -
rent carrying conductors used with the breaker must be
sized to correspond with the maximumsetting of the rat
-
ing plug, in accordancewith National ElectricCode
requ
i rements.
The
Rating Plug (See Fig.5.2) fits intoa specialcavityto
completethe trip unit.
The
Rating Plug current rating, (I,), is the basisfor the
trip unit current settings:
1) The longdelay protectionfunction of the trip unit isset
2) The short delay pick
- up setting is a multipleof I,.
3) The ground pick - up setting is independentof I,.
Rating Plugsfor the Digitrip RMS 31 0 Trip Unitsare
markedfor and may be applied on both
50 and 60 Hz
Systems.
at
I,.
Completecatalog descriptions of all available rating
plugs are given in the applicablecircuit breakersupple
-
mentary instruction leaflets (see Section 7.0).
7.0 REFERENCES
7.1 Digitrip RMS Trip Assemblies
I.L. 29C883
I.L. 29 - 885
I.L. 29
- 886
I.L. 29
- 888
7.2 R-Frame MoldedCase Circuit Breakers
29 - 107 Frame Instruction Leaflet
29C713 Supplementary Instructionsfor
Instructionsfor Digitrip
RMS 31 0 Trip Unit
Instructionsfor Digitrip
RMS 510 Trip Unit
Instructionsfor Digitrip
RMS 61 0 Trip Unit
Instructionsfor Digitrip RMS 81
0 Trip Unit
R
- Frameusedwith Digitrip RMS Trip
Units
AD29-167R TypicalTime - Current Characteristic
Curvefor R
- FrameCircuit Breakers
I.L. 29C714 MasterConnectionsDiagramfor
R
- FrameCircuit Breakerwith Digitrip
RMSTrip Units
A DANGER
BEFOREYOUFITTHERATINGPLUGINTO THETRIP
UNIT BE SURE TO CHECKTHAT THE BREAKER
TYPEAND FRAMERATING, MATCHTHOSE
PRINTED ON THE RATINGPLUGCOVER.
INSTALLINGA RATING PLUG THAT DOES NOT
MATCHTHE BREAKER TYPE AND FRAME RATING,
CAN PRODUCE SERIOUS MISCOORDINATIONAND/
OR FAILUREOFTHE PROTECTIONSYSTEM.
Effective February 2006
Page 5
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1
Cvlkriiamar
HPbblY68HIO Y*l. 81
Rating
Pluy
Fig. 3-1 Trip Unit Nameplate Catalog Nos.
RES1600LS, RESZOOOLS, and RES2500LS
n
Rating
G"d
a Culkriiomat
Fig. 3 - 2 Trip Unit Nameplate Catalog Nos.
RES1600LS1,RESZOOOLSI, and RES2500LSI
ilrp RMS 310
1
Gnd
Fig. 3 - 3 Trip Unit Nameplate CatalogNos.
RES1600LSG,RESZOOOLSG, and
RES2500LSG
Fig. 3 - 4 Trip Unit Nameplate Catalog Nos.
RES1600LSIG,RESZOOOLSIG,and
R ES25OOLSIG
I.L. 29C883E
Page 6
Effective February 2006
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I.L. 20C883E
u
Fig. 4 GroundFault Breaker with CoverRemoved
Fig.
5 - 2 TypicalRating Plug
Rating Plug Setting
(Amperes)
See Fig 2 6 and Fig 2-7 for
Continuation of Short Time and
Instantaneous Portions
of Curves
Current I,
Fig. 5 - 1 OptionalAdjustable Ampere SettingRating
Plug Usedin the Digitrip
RMS 310 Trip Unit
Effective February2006
Page 7
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Adjustable InstantaneousPick - up 0
Instantaneous FixedInstantaneous(Override) @I
with Adjustable Ground FaultTime
Ground Fault Adjustable Ground Fault Pick
- up
x x
x x x x
xx
Table 1 - 1. Digitrip Rms 310 Trip UnitTypes
Frame Rating 1600amps
2000 amps
2500 amps
Trip Unit Functions:
Long Delay FixedAmpere Rating
0 with Fixed
Long Delay
AdjustableAmpere Settingwith
FixedLong Delay
0
AdjustableShort Delay Pick - upwith
Short DelayTime I2tRamp
AdjustableShort DelayTime
0 with
Adjustable Short Delay Pick
- up,or
Short Delay
Digitrip
RMS 310Trip Unit Type Catalog Numbers
RES1600LS RESl6OOLSI RES16OOLSG RESl600LSIG
RES2000LS RES2000LSI RES2000LSG RES2000LSIG
RES2500LS RES2500LSI RES2500LSG RES2500LSIG
0 Fixed rating plugs available, see Table 1 - 2.
0 Optionalfour - setting adjustable rating plugs available, see Table 1 - 2.
0 Usingtrip unit with adjustableshort delay time (LSI, LSIG), instananeouspick - up is achieved when the lowest time
delay setting
(I) is selected.
@I A nonadjustableoverridesetting is set at the frame withstand rating.
Effective February 2006
I.L. 29C883E
Page 8
x x x x
x x x x
xx
xx
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I.L. 29C883E
Table 1 - 2. Digitrip RMS 310 Trip UnitTrip Function and Rating Settings
Trip Function
Ampere Rating
Fixed at 100%
Adjustable Long
Delay Pick
- up
Short Delay
Pick
- up
(Adjustable)
Short DelayTime
(Fixed)
Short DelayTime
(Adjustable)
Instantaneous
Pick
- up 0
Ground Fault
Pick
- up
(Adjustable)
GroundFaultTime
Delay
RatingEetting Description
Fixed rating plugs available:
Trip Unit
Ampere Rating Fixed Rating Plugs
1600A 800A, 1000A, 1200A, 1250AO, 1400A, 1500AO, 1600A
(In)
2000A 1OOOA, 1200A, 1250AO, 1400A, 1600A,2000A (In)
2500A 1200A, 1250AO, 1600A,2000A, 2500A (In)
Adjustable rating plugs available:
Trip Unit
Ampere Rating Adjustable Rating Plugs
1600A 800A, 1OOOA, 1200A, 1600A
(In)
800A, 1OOOA, 1250A, 1600AO (In)
2000A 1OOOA, 1200A, 1600A,2000A (In)
1000A, 1250A, 1600A,2000AO (In)
1200A, 1600A,2000A, 2500A (In)
1250A, 1600A,2000A, 2500AO (In)
2500A
In multiples of installed rating plug amperes (In) with marks at 2-3-4-5-6-7-8x 0
12t ramp configuration
Flat responsewith time delay settings at 0.1 sec, 0.2 sec, and 0.3 sec
In multiples of installed rating plug amperes (In) with marks at 2-3-4-5-6-7-8x
Settings
A=200A, B=400A,C=600A, D=800A, E=1000, F, H, K=1200A
Settings at instantaneous (I), 0.15 sec, 0.3 sec, and 0.5 sec
0 Not UL Listed
0 Occurs with short delaytime adjustment set at I.
0 7x and 8x settings not available for 2500A frame.
Effective February 2006 Page 9
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NOTES
Effective February 2006
I.L. 29C883E
Page 10
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I.L. 29C883E
NOTES
Effective February 2006
Page 11
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Effective February 2006
Publication 6605C97H06
Printed USA/TQC
All Rights Reserved
© 2001 Eaton Corporation
www.eatonelectrical.com
tel: [phone]
USA
Moon Township, PA 15108-4312
1000 Cherrington Parkway
Eaton Electrical business unit
Eaton Corporation
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