Table of Contents
Advertisement
Functions
2.2 Phase Comparison Protection and Ground Differential Protection
2.2
Phase Comparison Protection and Ground Differential Protection
The differential protection can be used in solid or resistive grounded, isolated and resonant-grounded
systems.
It comprises a phase comparison protection and a ground differential protection. The sensitive ground
element operates directionally or non-directionally.
The following chapter describes the functions
•
Differential protection topology
•
Phase comparison protection
•
Ground current differential protection in grounded systems
•
Ground fault differential protection in resonant-grounded/isolated systems
•
Differential protection test and commissioning
Differential Topology
2.2.1
The devices at both ends of the protected object communicate over their protection interfaces with one device
acting as master, the other as slave.
The device configured as master can perform the time synchronization for both devices.
2.2.1.1
Setting Notes
Protection Data Topology
At address 4701 ID OF MASTER and 4702 ID OF SLAVE you can enter the device identification number of
the two protection devices at the line ends.
Use address 4710 LOCAL RELAY to define which of the two devices acts as master and which as slave.
If you want the master to perform the time synchronization for both devices, please observe for which of the
two device a stable time signal is available.
2.2.1.2
Settings
Addr.
Parameter
4701
ID OF MASTER
4702
ID OF SLAVE
4710
LOCAL RELAY
2.2.1.3
Information List
No.
Information
3491
Master Login
3492
Slave Login
48
Setting Options
1 .. 65534
1 .. 65534
Master
Slave
Type of
Comments
Informa-
tion
OUT
Master in Login state
OUT
Slave in Login state
Default Setting
Comments
1
Identification number of Master
2
Identification number of Slave
Master
Local relay is
E50417-G1100-C474-A2, Edition 02.2018
SIPROTEC 4, 7SD80, Manual
Advertisement
Table of Contents
