User`s guide

Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com V3-T9-189
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9.4
Metering Devices, Protective Relays, Software and Connectivity
Protective Relays
Features, Benefits and Functions
●
Complete motor protection
and control in a single
compact case reduces
panel space requirements
and wiring costs
●
Microprocessor design
with self diagnostics
eliminates calibration
and reduces installation,
commissioning and
maintenance
●
Programmable stop
2–20% of PCT
●
Intel-I-Trip overload
protection develops
customized curve from
manufacturer’s supplied
motor data
●
Intel-I-Trip overload
protection provides
adaptive trip characteristics
based on motor
temperature when motor
RTDs are connected
through an optional
URTD module
●
Meets UL 1053 ground
fault protection standards
that eliminates the need
for a separate ground relay
saving cost, space, wiring
and time
●
Voltage dip/loss ride
through capability reduces
unnecessary trips caused
by poor power quality
●
Motor currents,
temperatures and
conditions are monitored
and displayed either locally
or remotely
●
Event log provides motor
operating records for the
most recent 20 Trip or
Alarm events with date
and time stamping. This
information can improve
troubleshooting and
reduce downtime
●
Log book records the most
recent 100 events such as
motor START/STOP and
set point changes to
provide a log of motor
operation with date and
time stamping
●
RTD diagnostics reduces
unnecessary tripping
caused by faulty RTD, RTD
wiring or communications
●
Arm/Disarm feature
improves security for
critical motor applications
●
Motor Start profile verifies
protection and motor
starting coordination. This
feature can be used to
develop protection settings
on old motors where data
is not available
●
Optional communication
module and Eaton’s
software simplifies setting,
configuration, monitoring,
commissioning and data
retrieval either locally or
remotely
●
Optional Quick Release
Drawout Case construction
simplifies relay removal
and replacement
The protection functions are
listed below.
●
I
2
t overload protection
(49/51)
●
Locked rotor (49S/51)
●
Ultimate trip current (51)
●
Negative sequence phase
unbalance (46)
●
Instantaneous
overcurrent (50)
●
Ground fault
protection (50G)
●
RTD trip and alarm with
URTD module (49/38)
●
Underload trip (37)
●
Starts per time (66)
●
Jam or stall (51R)
●
Auto or manual reset (86)
●
Fail-safe or non-fail-safe
trip modes
The metering functions are:
●
Motor currents:
●
Average current (Iave)
●
Individual phase and
ground current in
primary amperes
●
Percent of full load
●
Percent of phase
unbalance
●
RTD temperatures:
●
Individual winding
●
Motor bearing
●
Load
●
Auxiliary temperatures
●
Motor conditions:
●
Percent of I
2
t thermal
bucket
●
Time before start
●
Remaining starts
allowed
●
Oldest start time
Standards and Certifications
The MP-3000 motor
protection was designed to
meet the industry standards
for protective relays. It is
recognized under UL 1053
Ground Fault Protection
Standard.
●
UL recognized
(File No. E154862)
●
UL 1053 recognized
●
UL 508 recognized
●
ANSI C37.90, C37.90.1
●
cUL
●
CSA