Eaton MPCV Series, Instruction Booklet

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Instruction Booklet IB02402001E
December 2010
Instructions for the Eaton Type
MPCV Network Protection Relay
EaToN CoRPoRaTIoN www.eaton.com
For more information visit: www.EatonElectrical.com IB02402001E
Instruction Bulletin
Page
24
Effective: September 2004
Instruction for the
Cutler-Hammer Type MPCV
Network Protection Relay
PowerNet Reason Descriptions on MPCV Relay Status
Table 7 provides descriptions of all of the possible Status
and Reason states as reported by the MPCV Relay via Pow-
erNet. Note that the status is a function of the Aux_B input
contact to the MPCV in combination with any Trip or Close
control from the MPCV and time. The first column shows
network protector status based on the AUX B input contact,
where “C” denotes the network protector is sensed to be
CLOSED (physical Aux B contact is open). Similarly, an “O”
indicates an OPEN protector (Aux B contact is closed).
It indicates that all of the following TRIP descriptions imply
that the network protector has been sensed to be OPEN,
prior to which a protective TRIP control was issued to the
protector by the MPCV. The associated PowerNet Reason
String attempts to detail what power system condition
caused the MPCV to command a trip. The descriptions
provided for the Trip states are also applicable for
Time-Stamped Trip Events.
Note: Alarm Status has higher priority than Trip, Open or Close in
Table 7 below.
Table 7. PowerNet Reason Descriptions on MPCV Relay Status
NWP
Status
Relay
Status
Reason Description
C Closed Normal Sensed in the CLOSED position, Normal
O Open Normal Sensed in the OPEN position, Normal
O Open Remote Open
Block Open
Sensed in the OPEN position, and MPCV was Remotely commanded to be Open/ Blocked Open (ROBO)
O Trip Phase Reversal Typically indicative of a reversed phase condition on the network side. An improper CBA rotation set point will
also generate this reason. Bus voltages and the bus connections to the MPCV should also be verified.
O Trip Rolled Phase Typically indicative of a rolled phased power system condition. Bus voltages and the bus connections to the
MPCV should also be verified.
O Trip Per Unit
Voltage
Indicative of a reversed phase condition on the transformer, or a rolled phase on the transformer, or a rolled
phase on the network. Bus voltages and the bus connections to the MPCV should also be verified.
O Trip Sensitive Reverse current exceeded RT set point for at least 2 power cycles (instantaneous), Watt Trip characteristic
(WV=OFF), TD=0.
O Trip Time Delayed
Sensitive
Reverse current exceeded RT set point for the duration of the non-zero TD setting, Watt Trip characteristic
(WV=OFF).
O Trip De-energized The magnitudes of the positive sequence network voltage AND the positive sequence phasing voltage
indicates a de-energized network and feeder system condition. Bus voltages and the bus connections to the
MPCV should be verified.
O Trip Var Trip Reverse current exceeded RT set point for at least 2 power cycles (instantaneous), Watt-Var Trip characteristic
(WV=ON), TD=0, and the reverse current phasor fell in the var region (60 degree portion) of the overall Watt-Var
Trip curve.
O Trip Breaker
Pumping
Pump Protection is enabled, and the protector has cycled the programmed number of cycles within the pump
time setting. The MPCV will continue to command a TRIP to protector, until expiration of the Reset Timer or a
Remote command to clear the pumping fault.
O Trip Overcurrent Reverse current exceeded OC set point for at least 2 power cycles, Watt Trip characteristic (WV=OFF).
Overcurrent OC is strictly an “instantaneous” setting.
O Trip Non-Sensitive Technically refers to the “Sensitive Plus Non-Sensitive” trip mode of the MPCV Relay. This mode is selected by
setting TD=0, and OC>0, resulting in a trip characteristic with an intentional non-trip dead band region. This
mode is NOT recommended for most applications.
O Trip Watt Trip Reverse current exceeded RT set point for at least 2 power cycles (instantaneous), Watt-Var Trip characteristic
(WV=ON), TD=0, and the reverse current phasor fell in the Watt region (-5 deg portion) of the overall Watt-Var
Trip curve.
O Trip Time Delayed
Watt Trip
Reverse current exceeded RT set point for the duration of the non-zero TD setting, Watt-Var Trip characteristic
(WV=ON).
O Trip Overcurrent
Watt Trip
Reverse current exceeded OC set point for at least 2 power cycles, Watt-Var Trip characteristic (WV=ON).
Overcurrent OC is strictly an “instantaneous” setting.
O Trip Set Point MPCV has detected a checksum problem with the programmed set points in non-volatile memory.
Protector will trip and relay should be replaced.
O Trip RAM MPCV has detected a RAM memory problem on power-up. Protector will trip (for CH FW version V.1.016 and
GE FW version V1.017 or newer) and relay should be replaced.
(C) Alarm Failed to Open MPCV has tried to TRIP the protector, but did NOT sense that the Aux B input contact closed within 10 seconds.
May be a problem in the protector trip circuit or wiring of the Aux B contact.
(O) Alarm Failed to Close MPCV has tried to CLOSE the protector, but did NOT sense that the Aux B input contact opened within 10
seconds. May be a problem in the protector close circuitry or wiring of the Aux B contact
? Alarm Auxiliary 2
Alarm
Auxiliary Channel 2 has been activated, has been set to alarm on activation, and the channel is currently in the
active state.
? Alarm Auxiliary 3
Alarm
Auxiliary Channel 3, as Aux 2 above.
? Alarm Auxiliary 4
Alarm
Auxiliary Channel 4, as Aux 2 above.
? ? Not responding Possible loss of power, communication error, the relay is out of service or the wiring has been compromised.