1. 650 series overview
Protection for a wide range of applications, control of switching
devices with interlocking, and monitoring can be provided in
one IED.
The 650 series IEDs provide both customized and configured
solutions. With the customized IEDs you have the freedom to
completely adapt the functionality according to your needs.
The 650 series IEDs provide optimum 'off-the-shelf', ready-to-
use solutions. It is configured with complete protection
functionality and default parameters to meet the needs of a
wide range of applications for generation, transmission and
sub-transmission grids.
The 650 series IEDs include:
• Customized versions providing the possibility to adapt the
functionality to the application needs for protection and
control in one IED.
• Configured versions solutions are completely ready to use
and optimized for a wide range of applications for generation,
transmission and sub-transmission grids.
• Support for user-defined names in the local language for
signal and function engineering.
• Minimized rule based parameter settings based on default
values and ABB's global base value concept. You only need
to set those parameters specific to your own installed and
activated application.
• GOOSE messaging for horizontal communication on
bumpless redundant station bus following IEC62439–3 ed2
PRP.
• Extended HMI functionality with 15 dynamic three-color-
indication LEDs per page, on up to three pages, and
configurable push-button shortcuts for different actions.
• Programmable LED text-based labels.
• Settable 1A/5A -rated current inputs.
• Role based access control with independent passwords and
FTPS encrypted communication. Managed authentication
and accounting of all user activities.
2. Application
RET650 provides fast and selective protection, monitoring and
control for two- and three-winding transformers,
autotransformers, generator-transformer units and shunt
reactors. The IED is designed to operate correctly over a wide
frequency range in order to accommodate power system
frequency variations during disturbances and generator start-
up and shut-down. Apparatus control for up to 8 apparatuses
with interlocking can be included in one IED by function block
engineering.
A very fast differential protection function with built-in
transformer ratio matching and vector group compensation
makes this IED the ideal solution even for the most demanding
applications. Since RET650 has very low requirements on the
main CTs, no interposing CTs are required. The differential
protection function is provided with 2nd harmonic and wave-
block restraint features to avoid tripping for magnetizing inrush
current, and 5th harmonic restraint to avoid tripping for
overexcitation.
The differential function offers a high sensitivity for low-level
internal faults. The unique and innovative sensitive differential
protection feature of the RET650 provides the best possible
coverage for winding internal turn-to-turn faults, based on the
theory of symmetrical components .
A low impedance restricted earth-fault protection function is
available as a complimentary sensitive and fast main protection
against winding earth faults. This function includes a directional
zero-sequence current criterion for additional security.
Tripping from pressure relief/Buchholz and temperature
devices can be implemented through the IED's binary inputs,
where trip signal conditioning can be performed (pulsing,
lockout, additional logics, etc). The binary inputs are thoroughly
stabilized against disturbances in order to prevent incorrect
operations due to for example DC system capacitive
discharges or DC earth faults.
Versatile phase, earth, negative and zero sequence overcurrent
functions with directional capability provide further alternative
backup protections. Thermal overload with two time-constants,
overexcitation (volts per hertz) and over/under voltage
protection functions are also available.
A built-in disturbance and event recorder provides valuable
data to the user about status and operation for post-fault
disturbance analysis.
Breaker failure protection allows high speed back-up tripping of
surrounding breakers.
Three packages have been defined for the following
applications:
• Two-winding transformer in single breaker arrangements
(A01)
• Three-winding transformer in single breaker arrangements
(A05)
• One or two transformer tap changer control (A07)
The packages are preconfigured and ready for direct use.
Analog and tripping IO has been pre-defined for basic use.
Other signals need to be applied as required for each
application.
The graphical configuration tool ensures simple and fast testing
and commissioning.
Transformer protection RET650
1MRK 504 137-BEN B
Product version: 1.3
Revision: B
ABB
3
Issued: October 2016
