Eaton MPCV Series Instruction Booklet page 15

Instructions for the Eaton Type
MPCV Network Protection Relay
Characteristic Line
Straight Line (Standard) — Used on typical loaded system.
Circular — Used on lightly loaded system.
Pump Protection
This feature shall protect the network protector from exces-
sive close-trip (pumping) operation within a given time. When
the protector number of operations is equal or greater than
the breaker cycles within the pump time setting, the relay
shall initiate a trip and lock open to inhibit a close
operation until the reset time expires.
Manual (Remote) Close
Initiated via PowerNet by a PRC (Protective Remote Close)
command. The relay will relax the close criteria by effectively
setting the ML to near zero volts and expand the phasing
line(s) to the setpoint boundary for up to 10 seconds or until
closure is initiated. Upon expiration of the 10-second PRC
window or closure initiation, the original ML and PL pro-
grammed settings are restored. The Anti-Pump Protection
must be off to complete the PRC operation.
Dead Network
The relay shall initiate an instantaneous closure when the net-
work voltage is equal or less than the Dead Network setting.
Communication
Medium
INCOM with 1500 volt isolation via 3-pin connector and a
twisted pair cable.
Standard pendant via DB9 connector.
Protocol
INCOM — a Master/Slave two-way communication system.
The master (PC that has an RS-232c communication port)
requires the use of a MINT (Master INCOM Network Translator)
to convert the 33-bit binary messages to and from a 10 byte
ASCII encoded hexadecimal RS-232c messages.
Modulation: Carrier Based, FSK
Frequency: 115.2 KHz logical "one", 92.16 KHz logical "zero".
Message: 33 bits.
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Start Bit: 2 bits.
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Control Bit: 1 bit.
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Data: 24 bits.
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BHC Check: 5 bits code.
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Safety
The relay shall not permit any closure in automatic mode when:
1. Line-to-Ground fault is detected in any of the transformer
or network terminals.
2. Line-to-Line fault is detected between the transformer
terminals or network terminals.
3. Crossed-phase is detected in the transformer terminals or
in the network terminals.
4. Incorrect phase sequence is detected.
5. Rolled phase is detected.
6. Any one phase is dead in the transformer or network
terminals.
IB02402001E
Instruction for the
Cutler-Hammer Type MPCV
Network Protection Relay
Table 5. Trip Amperage as a Function of Percent of CT Primary,
from .05 – 5%
Percent
of CT
Primary
.05
.07
.1
.2
.3
.4
.5
Note: This table represents only that region from .05 – 5% of the CT
primary. The relay can be adjusted up to the 5% level if desired. The
ampere values listed are based upon the standard rating of current
transformers being applied to the appropriate rating of network
protector.
MPCV Relay
Addendum to IB-35-581B
The following set points are additions to IB-35-581B dated
October, 1997.
These set points appear on the pendant screen between the
INCOM ADR and YEAR set points, but were not noted on
Page 8 of IB-35-581B.
INCOME CODE=1999
If the INCOM CODE displays 1999, this indicates that the
relay is communications ready. If a hexadecimal value
appears, this indicates that relay communications have been
turned off.
Note: If a MPCV Relay is provided with communications turned off,
communications can be activated in the field by a qualified Eaton ser-
vice representative.
INCOM SETPT=ON
The default setting is ON with the capability to change to
OFF. If the INCOM SETPT=OFF, this prevents a user from
remotely changing set points through the IMPACC Series III
or PowerNet software.
INCOM OPEN=ON
The default setting is ON with the capability to change to
OFF. If the INCOM OPEN=OFF, this prevents a user from
remotely opening the breaker through the IMPACC Series III
or PowerNet software. This also effectively disables the set
point download as well, as the breaker must be ROBO'd
(Remote Open, Blocked Open) before any set points can suc-
cessfully be downloaded.
INCOM CLOSE=ON
If the INCOM CLOSE=ON, this permits a protected remote
close status which reduces the ML value to its operational
lowest point for a time period of 10 seconds. This requires
PowerNet software to enable this feature. Changing this
setting to OFF locks out the remote close feature.
For more information on Cutler-Hammer Network Protectors,
please contact us at 1-800-525-6821.
For more information visit: www.EatonElectrical.com
Instruction Bulletin
Instruction Booklet IB02402001E
Effective: September 2004
Network Protector Rating
800 1200 1600/ 2000/
1875 2250
0.4 0.60 0.80 1.00
0.56 0.84 1.12 1.40
0.8 1.20 1.60 2.00
1.6 2.40 3.20 4.00
2.4 3.60 4.80 6.00
3.2 4.80 6.40 8.00
4.0 6.00 8.00 10.00
Trip Amperage
EaToN CoRPoRaTIoN www.eaton.com
Page 15
December 2010
2500/ 3000/
2825 3500
1.25 1.50
1.75 2.10
2.50 3.00
5.00 6.00
7.50 9.00
10.00 12.00
12.50 15.00
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