Relay Self-Test; Statistical Data Features; Factory Setpoints - GE 269Plus Instruction Manual

3 SETUP AND USE
The 269Plus internal circuitry contains three separate self-tests: A/D, RTD, and memory circuitry tests are con-
tinually performed. The A/D test involves sending a known, precise voltage level through the A/D circuitry and
seeing if it is converted correctly. The RTD test involves reading a known, internal resistance and checking to
see if the correct temperature is determined. To test the memory circuitry, test data is stored in the 269Plus
relay's non-volatile RAM and is then read and compared with the original data.
Should any of these tests indicate an internal circuitry failure, the SERVICE LED will start to flash and the out-
put relay programmed for the self-test feature will activate.
When a relay A/D or memory self-test failure occurs, all metering and protective functions will
be suspended. The actual values display for all parameters will be zero in order to avoid nui-
sance tripping. When in this state, the relay will not provide motor protection. If a memory fail-
NOTE
ure occurs, the factory setpoints will be reloaded into the 269Plus. If an RTD hardware failure
occurs the
and TRIP levels will be automatically set to OFF; however all current-related functions will
continue to operate normally.
The 269Plus relay offers a record of maximum RTD temperatures and pre-trip current and RTD values in addi-
tion to a full range of motor statistical data. The maximum RTD temperature data is found on Actual Values
page 2 and can be cleared to zero by storing a YES in response to the
the end of page 2. Pre-trip motor current and temperature values are found in Actual Values page 5. These val-
ues will be updated only when a relay trip occurs. Note that if a trip function setpoint is set to INST. (instanta-
neous) and this type of trip occurs, the values for pre-trip current will not be recorded exactly. This is because
the relay has tripped instantaneously and thus did not have enough time to update the registers holding this
information. The pre-trip values can be cleared to zero by storing a
question at the end of Actual Values page 5.
D A T A ?
The statistical data (see Actual Values page 4) can be cleared to zero by storing a value of
the
S T A R T N E W C O M M I S S I O N I N G ?
to zero after reaching 255. The running hours and MegaWatt hours data will reset to zero after each reaching
the number 65535.
If a 269Plus is to be taken out of service for maintenance or testing purposes, the statistical data accumulated
by the relay may be copied to the new relay replacing it. Simply record the information from Actual Values page
4 and call the factory for a detailed procedure on transferring this information to the new relay. The benefit of
this exercise is the ability of the new relay to start with accurate data about the motor and the system to main-
tain a continuity from relay to relay during maintenance or testing of the original 269Plus.
When the original relay is ready to be reinstalled, the same procedure may be followed to transfer the accumu-
lated statistical data from the replacement relay to the original 269Plus.
The 269Plus is shipped with default setpoints stored in its non-volatile memory. These values are meant to be
used as a starting point for programming the relay and should be changed as each application requires.
In the event of a non-volatile memory failure, which will be detected by the self-test feature (see Section 3.25:
RELAY SELF-TEST on page 3–65), the relay will reload the factory setpoints but will not provide motor protec-
tion. A list of the motor current, RTD, and overload curve setpoints is given in Table 3–6: PRESET FACTORY
RELAY CONFIGURATIONS AND FUNCTIONS on page 3–69. For other factory setpoints see Table 3–3:
269Plus SETPOINTS on page 3–18.
GE Power Management
Courtesy of NationalSwitchgear.com
setpoint will be automatically set to 0 and the RTD ALARM
# O F S T A T O R R T D S U S E D
question at the end of page 4. The statistics on Actual Values page 4 will reset
269Plus Motor Management Relay

RELAY SELF-TEST

3.25 RELAY SELF-TEST

3.26 STATISTICAL DATA FEATURES

C L E A R L A S T A C C E S S D A T A ?
in response to the
Y E S C L E A R P R E - T R I P
in response to
Y E S

3.27 FACTORY SETPOINTS

3
question at
3-
65