ANSI 87 Line Differential Protection in SIPROTEC 5 (H-SIP5LB)

In this 1-day course, you will learn how to use DIGSI 5 to implement line differential protection as a protection function for monitoring lines and cables using two communication-linked SIPROTEC 5 line differential protections for the SIPROTEC 5 protections. This course focuses on the protection function itself, the settings that can be made and their meanings. It also covers how to practically test this function with an OMICRON test kit and how to handle the online display of the measurements.

This course is intended for individuals involved in the engineering process, determining settings, programming, and reading line differential protections of the SIPROTEC 5 series. Engineers, commissioning personnel, and maintenance technicians.

Theory of Line Differential Protection:

• The general principle.
• Stabilization, restraint, or bias of transformer differential.
• Line differential protection.
• Structure of the function and logical setup.
• ANSI87L communication is part of the line differential.
• SIPROTEC 5 stabilization of line differential.
• Idiff> Vector comparison with renewed Fourier filters.
• Current transformer fault stabilization.
• Idiff> CT (saturation) detector stabilization.
• Measurement value transfer synchronization.
• Setting steps DIGSI 5 and DIGSI 4.
• A transformer within the protected object.
• Load current stabilization I-diff limit.
• Inrush stabilization 2nd HH method. Transformer in the diff area or directly nearby.
• Response to higher harmonics.
• Inrush phenomena.
• Overexcitation and saturation.
• CWA inrush recognition. Transformer in the diff section or directly nearby.
• Idiff and I-diff fast or I-diff fast 2 (>=CP2300).
• Monitoring the differential current.
• Carryover tripping.
• Introduction to settings for a cable or line.
• General settings of the line differential.
• Idiff setting of the line differential.
• Idiff fast 2 setting of the line differential.
• Idiff fast setting of the line differential.
• Carryover setting of the line differential.
• Pickup and operate of the line differential.
• Disabling or logging out of the local line differential.
• Stationary differential current.
• Idiff fast or I-diff fast 2 setting (Qdiff).
• Example settings with transformer.
• Multi-legged differential.
• Setting data in SIPROTEC 5.
• Hardware.
• LEDs.
• CT/VT connections.
• Function group connections.
• Power system data.
• Line protection general.
• Inrush detection or Closure Detected Line Protection.
• Line protection.
• Idiff Fast2.
• Carryover.
• Setting data for necessary communication.
• Time synchronization of differential communication.
• Variants of differential communication.
• Structure of classical differential communication.
• Direct communication.
• Communication via multiplexing.
• Communication via media.
• Differential communication SIPROTEC 4 and 5.
• Structure of extended differential communication.
• Extended communication via UART.
• Extended communication via Ethernet-BD.
• Protection communication Type 1.
• External synchronization.
• Linking protection to communication.
• Internal "External" synchronization.
• Setting data IP example.
• Hardware setting PPS synchronization USART setup.
• Prot.com. (Type 1) example.
• Display example.
• Testing.
• Examples, applications, tips.
• Line differential protection in combination with a SIPROTEC 5 and a SIPROTEC 4 protection.