Eaton Cutler-Hammer Digitrip 1150 User manual

EATON CORPORATION Cutler-Hammer InformationSheets 70C1486H01 1
Digitrip 1150 with
MaintenanceMode
EffectiveJuly2006
I.S. 70C1486
Supplement to I.L. 70C1036
FIGURE 1. Digitrip with ARMs in Magnum Circuit Breaker
Table of Contents
1.0 General ................................................................... 2
2.0 Maintenance Mode Settings.................................... 2
3.0 ArmingMaintenanceMode...................................... 2
4.0 Remote Indicator ..................................................... 3
5.0 ChoosingtheReductionSetting .............................. 3
6.0 TrippingandTesting ................................................ 3
Diagrams and Appendix
WiringDiagram ............................................................... 4
DisplayMatrix for ProgramSettings Menu ...................... 5
Display Matrix for ProgramAux Relays Menu ................. 6
Display Matrix for ProgramAccessory Bus ..................... 7
DisplayMatrix for Possible EventsTRIP.......................... 8
Display Matrix for View Settings Menu ............................ 9
Manufacturer’sStatement ............................................. 10

2EATON CORPORATION Cutler-Hammer Information Sheets 70C1486H01
WARNING
ONLYCERTIFIEDANDCOMPETENT PERSONNEL
SHOULDATTEMPT TO INSTALL OR MAINTAIN
POTENTIALLYHAZARDOUS EQUIPMENT.
DO NOTATTEMPT TO INSTALL OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS
ENERGIZED.DEATHOR SEVEREPERSONALINJURY
CANRESULT FROMCONTACT WITHENERGIZED
EQUIPMENT. ALWAYS VERIFY THAT NO VOLTAGE IS
PRESENTBEFOREPROCEEDING.ALWAYSFOLLOW
SAFETYPROCEDURES.
EATON IS NOT LIABLE FOR THE MISAPPLICATION OR
MISINSTALLATION OF ITS PRODUCTS.
1.0 General
Perthe aboveWARNING,it is highly recommended that
maintenancebeconducted on electricalequipment
includingcircuit breakers with the systemde-energized.
For situations that arise where this is not possible, the
MaintenanceModefunction of the Digitrip1150ARM family
(cat.11ARMLSI,11ARMLSIG,11ARMLSIA)can reduce
Arc Flash incident energy that is generated on a fault
condition. This is accomplished by an analog trip circuit
which, when armed, provides a fast acting response to the
fault.The reduced arccondition willoccur only indevices
downstreamof the tripunit in MaintenanceMode.This is
separatefrom thenormal systemprotection setting of
Instantaneous.The Maintenance Modeislocated in the
“SYSTEM”submenuof the programmable settingsmenu
(PGMSET). (See Appendixfor screen details.)
CAUTION
OBSERVEALLRECOMMENDATIONS, NOTES,CAU-
TIONS,AND WARNINGS RELATING TO THE SAFETY
OFPERSONNELAND EQUIPMENT.OBSERVEAND
COMPLY WITHALL GENERALAND LOCALHEALTH
ANDSAFETYLAWS, CODES,ANDPROCEDURES.
AFLASH HAZARDANALYSIS SHOULD BE DONE TO
DETERMINEPERSONAL PROTECTIVEEQUIPMENT
REQUIREMENTS.
2.0 Maintenance Mode Settings
TheMaintenanceMode Settings providetheArc Flash
Reduction setting. 2.5 x Rating Plug Value is the Maxi-
mum reduction setting which correlates to the lowest
pickupvalue.
AvailableTripcurrentof Maintenance Mode Settings:
2.5 x Rating Plug Amperes
4.0 x Rating Plug Amperes
6.0 x Rating Plug Amperes
8.0 x Rating Plug Amperes
10.0 x Rating Plug Amperes
3.0 Arming Maintenance Mode
Thereare three waysto arm theMaintenance ModeArc
Flash Reduction setting. One method is via the local
keypad located on the trip unit. The setting is located in
the“SYSTEM”submenuof programmable settings(PGM
SET).When the MainternanceModeArc Flashreduction
settingis enabled, themessage “Maintenance Mode
Enabled” is displayed to confirm that the function is on. If
any key is pressed, the Maintenance Mode message is
removedandreplaced by normaldisplaymessages. If no
keys are pressed, the Maintenance Mode message will
reappearafter10seconds.
For the second method, a remote switch wired through the
breaker secondary contacts can remotely arm the
Maintenace Mode setting.Ahigh quality, gold plated or
palladiumcontact is requiredin this application.The
MaintenanceModeEnabled message willverifythat the
functionisarmed.(See wiring diagram onadjacentpage.)
A third method to arm the maintenance setting is via a
communication device.APalm Pilot along with an IR Mint
device can be employed to arm the setting. By initiating
the ENABLE setting, the Maintenance Mode selection in
the control screen of the Palm, Maintenance Mode is set.
Thereis a confirmation screenthat verifies the arming.A
BIM(BreakerInterfaceModule) is another communcation
method to arm the setting. When Maintenance Setting is
enabledvia device communications,this setting mustbe
disabledbydevice communications.

EATON CORPORATION Cutler-Hammer InformationSheets 70C1486H01 3
4.0 Remote Indicator
Circuitbreakers built afterJuly 2006will be wiredwith
secondary contactsA12 which is reassigned to
MaintenanceMode Enable. (MM_E)- (See labelon
secondary contacts)Anormally open contact (A10,A11) is
availableforcustomerusevia programming of RelayA. This
contact can be used to indicate remotely that the
Maintenancesetting is armed.Referto diagram onpage
threefor a wiringof this remote(blue light) indicator.
5.0 Choosing the Reduction Setting
TheArc Flash MaintenanceSwitchhas five unique
settings. From the factory, the Magnum circuit breaker is
shipped with the Digitrip unit set to the 2.5x setting and
withitsMaintenance Mode disabled.The“Maintenance
ModeEnabled”message provides anindicationthat the
Maintenance Mode setting is armed per one of the three
methods described in section 3.0.
Ingeneral, theselection of one of the Reduction Settings
should be determined and selected by a person who is
experienced in power system analysis.
This setting choice normally does not change unless there
are future system modifications that could increase or
decreasefault levels at the circuitbreaker location.
Fortime/currentcurveinformation,refertodrawing
#70C1498.
6.0 Tripping and Testing
TheMaintenanceModefunctionwill provide fast tripping
evenwhen the regularInstantaneousisset to OFF.The
Instantaneous LED position is also used to indicate a trip
initiatedby theMaintenance Mode setting. The message
“MaintenanceMode Trip” will bedisplayed after a trip.
TheMaintenancesetting, external wiring(ifany) and
trippingfunctionalityshould all beperiodicallyverified by
primaryor secondary injectioncurrent testing.
FIGURE 2. Digitrip 1150 with ARMs

4EATON CORPORATION Cutler-Hammer Information Sheets 70C1486H01
Maintenance Mode Wiring
Digitrip 1150 with ARMs
The Digitrip 1150 (Cat #11ARMxxx) can locally be placed in Maintenance Mode via front panel programming
of the Trip Unit. The function can also be armed via a remote switch as shown. In addition, the function can
be activated via communications. The display will indicate “Maintenance Mode In Use” when in this special
mode.
The recommended selector switch for this low voltage application is Cutler Hammer part number
# 10250T1333-2E which includes a contact block rated for Logic Level and Corrosive Use.
The maximum length of this wiring to the remoteARM switch (or alternate relay contact) is three meters
(9.78 feet). Use #20 AWG wire or larger.
Control voltage is 120 VAC or 230 VAC or 24-48 VDC or 125 VDC as ordered. Check Magnum circuit breaker
front cover for Trip Unit Power requirements.
A remote Stack Light, Annunciator Panel or other remote indication device can be connected to remotely verify
that the Digitrip is in Maintenance Mode.
RelayA contact changes state when Digitrip is in Maintenance Mode. This action requires pre-assigning RelayA
to Maintenance Mode function. RelayC contacts (A9,A10) are also available to be programmed to provide an
indication of a trip in Maintenance Mode.
The Digitrip 1150 can also be placed remotely in its Maintenance Mode via a General Purpose Relay
(ice cube type with Logic Level contacts) activated by a remote control switch. A recommended type is
IDEC Relay Ry22. Choose voltage as desired.
Contact is rated 1A @ 120 VAC or 0.5A @ 230 VAC or 1A @ 24-48
VDC or 0.35A @ 125 VDC.
NOTES:
A11

EATON CORPORATION Cutler-Hammer InformationSheets 70C1486H01 5
Program
Settings
Menu
CURRENT
SYSTEM
DISPLAY
Program
Program Current
Curve
ESC / SEL
SLIDING
DEMAND
WAVEFORM
CAPTURE
SYSTEM
DISPLAY
INCOM
Program Display
Settings
DISPLAY
INCOM
AUXRLY
INCOM
AUXRLY
ALARMS
Program Auxiliary
Relays
Program
Alarms
AUXRLY
ALARMS
ACCBUS
ALARMS
ACCBUS
TripLink
Program
Accessory Bus
ACCBUS
TripLink
TIME
TripLink
TIME
VOLTAGE
TIME
VOLTAGE
CURRENT
VOLTAGE
CURRENT
SYSTEM
Program
VOLTAGE,FREQ
Settings
FREQ
Hz
BC RELAY
RESET
NOTE: Screen shown for
Digitrip 1150 - Cat. # 11ARMxxxx.
Program
TripLink
Program
Time
50,60 Manual,
Auto
OFF,
max kW,
max kVA
ENABLED
DISABLED
DT 910
COMM
9600
1200
OPEN
TRIP
ENABLED
DISABLED
INCOM
ADDRESS
INCOM
BAUD
EXT COMM
OpenTrip
EXT COMM
EXT COMM
CLOSE
001-FFE
in hex
ENABLED
DISABLED
ENABLED
DISABLED
NOTE: TRIP uses TA device.
OPEN requires a separate
Shunt Trip wired through Aux
Relay C (terminals (A-9, A-
10)) when programmed as
EXT COMM TRIP via
PowerNet. Requires BC Reset
(auto) in system.
Appendix
RevPower
SENSING
ENABLED
DISABLED
Maint PU
. x In
A
2.5
4.0
6.0
8.0
10.0
Mainten-
ance Mode
ENABLED
DISABLED
NOTE: For units built
after July 2006, this
setting replaces function
of secondary contact
hardware jumper.
NOTE: Throughout Program Settings
sub-menus with blocks ( ) represent
variable information that can be directly
changed with the EDIT buttons, while
X's represent variable information that
is viewable.