IES-311 Feeder Protection
IES-311 is a microprocessor-based protection, control and monitoring device designed for various primary equipments (such as overhead line, underground cable and auxiliary transformer etc.) on solidly grounded, Peterson coil grounded, low impedance grounded and ungrounded system. With flexible and powerful configuration tool, IES-311 offers future-oriented system solutions with high investment security and low operating costs.
The device is freely programmable. Functional logic diagrams can be developed with the use of graphical programming tool which also supports the configuration of binary inputs and outputs, analog inputs, control buttons, LEDs, disturbance recorder, event recorder, and user interface. Freely programmable logic makes it possible to modify typical functional logic diagrams considering a peculiar nature of the protected object. Three basic types of standard 19” case help to choose the most appropriate solution.
IEEE
IEC
Features
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01
Highly Flexible
Support 6 currents and 5 voltages inputs. Together with flexible PLC logic, it can easily realize the automatic switchover of backup power supply.
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02
Multiple Funtion
Powerful GOOSE function helps to realize the simple busbar protection and shortens the busbar fault clearing time.
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03
High Realibility
Unique phase selection element to avoid the problem of wrong selection of multiple phases by using out-of-range phase selection elements.
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04
Fast Tripping
With special processing in CB failure protection, the dropout time of current criterion element is less than 12 ms.
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05
High Accuracy
Support fault location function which can locate the fault location with the deviation less than 5%.
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06
Widely Application
Up to 10 remote control outputs which can meet the control requirements of multiple breakers, switches and ground switches.
Technical Specifications
Download
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Standard
IEC 60225-1: 2009
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Dimensions (W×H×D)
455×266.7×233.5mm（6U，without mounting bracket)
221.3x266.7x233.5mm（6U 1/2，without mounting bracket)
160.3x266.7x233.5mm（6U 1/3，without mounting bracket) -
Mounting Way
Flush mounted、semi-flush mounted、wall mounted、panel mounted
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Material
Stainless steel
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Protection Class
Front panel:IP54
Side panel:IP40
Rear panel:IP30 -
Communication Ports
2 or 4 100Base-TX RJ45 Ethernet ports
2 or 4 100Base-FX optical ports
2 RS-485 serial ports for SCADA communication
1 RS-485 serial port for clock synchronization
1 front RJ45 port for debugging -
Communication Protocol
IEC 61850 Editions 1&2&2.1
IEC 60870-5-103
IEC 60870-5-104
DNP3.0
Modbus
IEC 62439 Parallel Redundancy Protocol (PRP)
IEC 62439 High-availability Seamless Redundancy (HSR)
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) -
Clock Synchronization
IRIG-B: IRIG-B via serial port
PPS: Pulse per second (PPS) via serial port or binary input
IEEE 1588: Clock message based on IEEE 1588 via Ethernet network
SNTP: Unicast (point-to-point) & broadcast SNTP mode via Ethernet network -
Functions
Phase overcurrent protection(50/51P)
Directional and non-directional overcurrent protection(67P)
Earth fault overcurrent protection(50/51G)
Negative-sequence overcurrent protection(50/51Q)
Sensitive earth fault protection (50/51SEF)
Phase overvoltage protection (59P)
Residual overvoltage protection(59G)
Negative-sequence overvoltage protection(59Q)
Positive-sequence overvoltage protection(59Pos)
Phase undervoltage protection(27P)
Overfrequency protection (81O)
Underfrequency protection (81U)
Undercurrent protection (37)
Breaker failure protection (50BF)
Thermal overload protection(49)
Restricted earth fault protection(64REF)
Current unbalance protection (60/50)
Voltage unbalance protection (60/59)
Automatic reclosure (79)
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