Overview
CSC-211 Multifunction Protection IED is versatile IED designed for protection, control and monitoring of feeders. The devices can be used for line protection in networks that are grounded, low-resistance grounded, ungrounded, or of a compensated neutral point structure. It is able to supervise primary apparatus such as circuit breakers and disconnectors. 

Functions

Current protection

- Overcurrent protection

- Earth fault protection

- Neutral earth fault protection

- Sensitive earth fault protection

- Negative-sequence overcurrent protection

- Thermal overload protection

- Overload protection

Voltage protection

- Overvoltage protection

- Undervoltage protection

- Displacement voltage protection

- Breaker protection and control function

- Breaker failure protection

- Dead zone protection

- Synchro-check and energizing check

- Auto-recloser

- Three-pole tripping

Capacitor bank protection

- Unbalanced current protection

- Unbalanced voltage protection

- Undercurrent protection

Load shedding function

- UnderFrequency load shedding function

- Undervoltage load shedding function

- Overload load shedding function   

Secondary system supervision

- CT secondary circuit supervision   

- VT secondary circuit supervision

Other functions

- Fast busbar protection using reverse interlocking   

Control functions

- Circuit breaker, disconnector and other switching devices control

Monitoring functions

- Position of circuit breaker, disconnector and other switching device monitoring

- Circuit breaker status supervision

- Auxiliary contacts of circuit breaker supervision

- Self-supervision

- Fault recorder

Front communication port

- Isolated RS232 port

Rear communication port

- 0-1 isolated electrical RS485 communication ports

- 0-2 Ethernet electrical/ optical communication ports

- Time synchronization port

Communication protocols

- IEC 61850 protocol

- IEC 60870-5-103 protocol

Features

Extensivemultifunction IED including protection, control and monitoring functions

Three pole tripping required in sub-transmission and distribution network

A complete protection functions library, include:

- Overcurrent protection

- Earth fault protection

- Neutral earth fault protection

- Sensitive earth fault protection

- Negative-sequence overcurrent protection

- Thermal overload protection

- Overload protection

- Overvoltage protection

- Undervoltage protection

- Displacement voltage protection

- Circuit breaker failure protection

- Dead zone protection

- Synchro-check and energizing check

- Auto-reclose function for three-phase reclosing

- Unbalanced current or voltage protection

- Undercurrent protection

- load shedding function

- Voltage transformer secondary circuit supervision

- Current transformer secondary circuit supervision

Fast overcurrent/busbar protection scheme using IEC61850 GOOSE-message

CB status supervision