Features
Protection Features
• Phase overcurrent elements:
• Three instantaneous elements with timers ( 50P[1], 50P[2], and
50P[3])
• Three inverse time overcurrent elements (51P[1], 51P[2], and
51P[3])
• 11 standard curves
• Instantaneous or time delay reset
• Voltage Restraint (51P[2], and 51P[3])
• Directional Control (All Elements)
• Ground overcurrent elements:
• Two instantaneous measured elements with timers (50X[1],
and 50X[2])
• Two instantaneous calculated elements with timers (50R[1],
and 50R[2])
• Two inverse time overcurrent measured elements (51X[1], and
51X[2])
• Two inverse time overcurrent calculated elements (51R[1], and
51R[2])

• 11 standard curves
• Instantaneous or time delay reset
• Directional Control (All Elements)
• Breaker failure (50BF) .
• Phase unbalance negative sequence overcurrent (46[1], 46[2])) .
• Phase voltage unbalance and sequence protection (47[1], 47[2]) .
• Main 3-phase under/overvoltage (27M[1], 27M[2], 59M[1], 59M[2])
• Auxiliary single-phase under/overvoltage (27A[1], 27A[2], 59A[1],
59A[2])
• Ground fault overvoltage relay (59N[1], 59N[2])
• 6 Frequency elements that can be assigned to: over frequency,
under frequency, rate of change, or vector surge (81[1], 81[2],
81[3], 81[4], 81[5], 81[6])
• Apparent and displacement power factor (55A[1], 55A[2], 55D[1],
55D[2]) .
• Forward and Reverse Watts (32[1], 32[2], 32[3])
• Forward and Reverse Vars (32V[1], 32V[2], 32V[3])
• Synch Check (25)
• Autoreclosing (79)
• Zone interlocking for bus protection (87B) .
• Switch onto fault protection
• Cold load pickup
Metering Features
• Amperes: Positive, negative and zero sequence .
• Ampere demand .
• Volts: Positive, negative and zero sequence .
• Phase angles .
• Volt-amperes and VA demand .
• Watts and kW demand .
• kWh (forward, reverse, net)
• Vars and kvar demand
• kvarh (lead, leg and net) .
• Power factor .
• Frequency .
• % THD V and I .
• Magnitude THD V and I
• Minimum/maximum recording .
• Sync Values
• Trending (load profile over time)
Monitoring Features
• Trip coil monitor
• Breaker wear primary and secondary (accumulated interrupted
current) .
• Oscillography (6000 cycles total) .
• Fault data logs (up to 20 events) .
• Sequence of events report (up to 300 events) .
• Clock (1 ms time stamping) .
Control Functions
• Breaker open/close
• Remote open/close
• Programmable I/O
• Programmable Logic
• Programmable LEDs
• Multiple setting groups .
• Cold load pickup .
• CT supervision
Communication Features
• Local HMI .
• Password protected .
• Addressable .
• IRIG-B
• Local USB communication port .
• Configuration software
• Remote communication port:
• RS-485 Terminals
• Ethernet RJ45
• Fiber Optic ST
• RS-485 D-SUB
• LC Duplex Fiber Optic
• Protocols:
• Modbus-RTU
• Modbus-TCP
• IEC-61850
• DNP3-RTU
• DNP3-TCP/UDP
• Profibus-DP
wechat/whatsapp:
+86-181-44100-983
Email: kongjiangauto@163.com
Copyright © 2009 - 2026 Cld , All Rights Reserved K-JIANG All rights reserved