D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 3
D90
Plus
Line Distance Protection System
Chapter 2: Product description
Product description
This chapter outlines the product, order codes, and specifications.
Product description
Designed for superior performance and ease-of-use, the D90
Plus
is a single platform
solution for protecting transmission lines from medium voltage (MV) to extra high voltage
(EHV) and cables of various voltage levels. It allows transmission limits to be maintained or
even increased while respecting the transient stability limits of the power system.
The scalable platform consists of protection, control, automation, monitoring,
communication, digital fault recorder, and security functionality. This incremental scaling
allows advanced customization to suit specific user requirements. The convergent
platform integrates multiple devices, eliminating external devices and reducing the
footprint of relay panels, resulting in reduced wiring, commissioning, and capital costs. The
unique sub-cycle distance algorithm can trip in less than one power system cycle for
source impedance ratios (SIR) up to 30.
The key benefits of the D90
Plus
are
• Secure subcycle protection ensures trip times less than one cycle
• Reliable and secure protection on lines equipped with series compensation
• Superior phase selection algorithm ensures secure high speed single-pole tripping
• Simplified programmable automation controller eliminates the need for substation
programmable logic controller
• Configurable alarm annunciator eliminates the need for separate annunciator panel
• Intuitive and easy-to-use large front panel color display with preconfigured
information on metering, fault records, event records, and separate control screen for
bay control
• High-end fault and disturbance recording, including internal relay operating signals,
eliminating the need for redundant recording devices
• Reduced installation space requirements through compact design
• True convergence of protection, metering, automation, bay control functions, multiple
input and output options, and extensive communications capability
• Built-in phasor measurement unit streaming synchrophasors as per IEEE C7.118
To Next Page
Loading...
