Operations Manual ELECTRICAL APPARATUS
UM30 Three-Phase Frequency and Universal Voltage Relay S150-22-1
July 1998 1998 Cooper Industries, Inc. •New issue. 1
The Operations Manual is designed to familiarize the
reader with how to install, program, and set up the relay
for operation. For more detailed information regarding
the relay’s theory of operation, application notes, internal
schematics, service information, etc., please refer to the
UM30 section of the Edison® Relay Technical Reference
Manual, bulletin R150-00-1. Contact your local Cooper
Power Systems representative for ordering information.
CONTENTS
HANDLING.........................................................................1
INSTALLATION.................................................................... 2
ELECTRICAL CONNECTIONS ...............................................2
OUTPUT RELAYS ...............................................................2
BLOCKING INPUTS .............................................................2
TARGET DESCRIPTION .......................................................4
KEYBOARD OPERATION .....................................................4
PROGRAMMING THE RELAY ...............................................4
CHANGING A SETTING .......................................................4
DESCRIPTION OF RELAY SETTING VARIABLES ....................4
CHANGING OUTPUT RELAY ASSIGNMENTS..........................7
BLOCKING VARIABLES.......................................................8
RUNNING THE TEST PROGRAMS......................................... 8
REAL TIME MEASUREMENTS.............................................. 8
LAST EVENT DATA.............................................................9
CUMULATIVE TRIP COUNTERS.......................................... 10
SPECIFICATIONS.............................................................. 11
SETTINGS SHEET FOR UM30 RELAY ................................12
INTRODUCTION
The UM30 relay provides all of the voltage and
frequency-related functions necessary for the protection
of a feeder or rotating equipment. Two digital inputs are
available to provide selective blocking of various
functions. Five output relays are provided, of which four
are programmable. All settings, measurements, and
programming of the relay are possible through its front
panel controls, or by means of a computer connected to
the relay’s RS485 communications port. The functions
provided by the UM30 are:
nTwo frequency elements each configurable as either
under (81U), over (81O), or under and over (81U and
81O) elements.
nTwo overexcitation elements (24).
nTwo voltage elements each configurable as either
under (27), over (59), or under and over (27 and 59)
elements.
nOne positive sequence voltage element configurable
as either an under (27pos), over (59pos), or under
and over (27pos and 59pos).
nOne negative sequence overvoltage element
(59neg).
nTwo zero sequence overvoltage elements (59zero),
with indication of the faulted phase.
The UM30 offers two programmable inputs, which can
serve to block the operation of the over and under
protective elements.
Separate pickup functions are also provided for all
elements which may be used to operate output relays to
in order to implement various control, blocking, logic, or
SCADA functions.
HANDLING
As with any piece of electronic equipment, care should be
taken when handling the relay, particularly in regards to
electrostatic discharge as the damage may not be
immediately obvious. All Edison relays are immune to
electrostatic discharge when left in their protective case.
However, when the relay is removed from its case, the
following practices should be observed.
nTouch the case to ensure that your body and the
relay are at the same potential.
nWhenever possible, handle the exposed relay by the
front panel, the rear connector, or by the edges of the
printed circuit boards. Avoid touching the individual
electronic components or the embedded traces on
the circuit boards.
nIf you must hand the exposed (i.e., drawn-out) relay
to another person, make sure you are both at the
same electrical potential.
nWhen setting the drawn-out relay down, make sure
the surface is either anti-static in nature or is at the
same electrical potential as your body.
nRelays should always be placed in storage in their
protective cases. If storage of the drawn-out relay
outside of its protective case is required, then the
