PROTECTION
•
Phase, Neutral, and Negative Sequence
Instantaneous Overcurrent elements with
settable time delay: 50TP, 150TP, 50TN,
150TN, 50TQ, 150TQ
•
Phase, Neutral, and Negative Sequence
Time Overcurrent elements: 51P, 51N,
51Q, 151N
•
U.S. and IEC timing curves plus user
programmable curve
•
Minimizes transient overreach and
overtravel on overcurrent elements
•
Separate ground current input
•
Breaker Failure protection function: BF
•
Two general purpose logic timers: 62, 162
•
Programmable Logic using BESTlogic
•
Two protection setting groups with
external or automatic (cold load pickup,
load, unbalance, recloser shot) selection
modes
CONTROL
•
Virtual breaker control switch—
controllable from both HMI and com.
ports: 101
•
Two virtual selector switches—
controllable from both HMI and com.
ports: 43 and 143
•
Optional four shot recloser, including
separate pilot and time delayed reclose
initiates, with zone sequence coordination
and sequence controlled protective
element blocking functions.
INSTRUMENTATION
•
Real time A, B, C phase, neutral, and
negative sequence currents
•
1% meter accuracy down to 10% of
nominal current
REPORTS
•
Current demands for phase, neutral, and
negative sequence currents—magnitudes
and time stamps are recorded for today's
peak, yesterday's peak, and peak since
reset
•
Breaker operations counter and contact
interruption duty
FAULT RECORDING
•
Fault summary reports: 16 total. Two
most recent Fault Summary Records
saved to non-volatile memory
•
SER: 255 event sequence of events
report with I/O and alarm sub-reports
•
Oscillography:
- Up to 16 fault records, 15 cycles long
@ 12 samples/cycle
- 1 or 2 oscillography records per fault
report
- COMTRADE 97 or 99 format
COMMUNICATION PORTS
•
Two independent general purpose
communication ports
- Front RS-232 ASCII communications
- Rear RS-485 ASCII or optional
Modbus
TM
protocols
•
IRIG-B time sync (demodulated), TTL
•
Optional 10/100 BaseT Ethernet port
with BESTNet Easy Ethernet or with
Modbus/TCP protocol
SELF TEST AND
ALARM FUNCTIONS
•
Relay fail, major alarm, and minor alarm
LEDs, and fail-safe alarm output contact
•
Extensive internal diagnostics monitor
all internal functions of the relay
•
More than 20 additional alarm points—
programmable for major or minor priority
Including:
- Reclose fail and lockout
- Phase demand overload alarm
- Neutral and negative sequence
unbalance demand alarms
- Three breaker alarm points—
programmable for slow trip,
interruption duty threshold, or
operations counter
- Trip circuit voltage and continuity
monitor
- Close circuit monitor via BESTlogic
PROGRAMMABLE I/O
•
Four programmable inputs
•
Five programmable outputs and one
dedicated programmable alarm output
HARDWARE FEATURES
•
Active CT technology for low burden
and increased dynamic range
•
Flash Memory for upgrading embedded
programming without changing chips
•
Integral HMI with 2x16 character display
•
Compact panel mount case with integral
mounting studs for a clean installation.
Less than 3/8" projection in front of
panel.
2
APPLICATIONS
ORDERING INFORMATION
BESTlogic
SPECIFICATIONS
FUNCTIONAL DESCRIPTION
FEATURES
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