IES-311 Feeder Protection

IES-311 is a microprocessor-based protection, control and monitoring device designed for various primary equipment (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.

Configurable to System Requirements
Multi-Function Capability
Engineered for Long-Term Reliability
Fast Tripping

Get in Touch

Product Highlights Technical Specification Industries We Serve

Product Highlights

Configurable to System Requirements

Support 8 currents and 4 voltages inputs. Together with flexible PLC logic, it can easily realize the automatic switchover of backup power supply.

Multi-Function Capability

Powerful GOOSE function helps to realize the simple busbar protection and shortens the busbar fault clearing time.

Engineered for Long-Term Reliability

Unique phase selection element to avoid the problem of wrong selection of multiple phases by using out-of-range phase selection elements.

Fast Tripping

With special processing in CB failure protection, the dropout time of current criterion element is less than 12 ms.

Technical Specification

Dimensions (WxHxD)

455 mm×266.7 mm×233.5 mm; (6U height, 1/1 chassis, excluding mounting bracket); 221.3 mm×266.7 mm×233.5 mm; (6U height, 1/2 chassis, excluding mounting bracket)

Mounting Way

Surface mounting, flush mounting, semi-flush mounting, wall mounting, and panel mounting

Material

Stainless stee

Protection Level(Front Panel)

IP54

Protection Level(Side Panel)

IP40

Protection Level(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

Clock Synchronization

IRIG-B; PPS; IEEE 1588; SNTP

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); Over-frequency protection (810); 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); Distance protection(21)