Combined Protection and Control System
CSP2-F Feeder Protection
CSP2-L Cable-/Line Differential Protection
CSP2-T Transformer Differential Protection
Introduction
The top-quality digital protection and control system of
the SYSTEM LINE fulfils all demands and needs for
protection and control at medium-voltage level.
The combined protection and control system CSP2 is a
feeder management system for the medium-voltage
requirements. The system complies with state of the art
modern digital protection technology.
Development work focuses primarily on the following
goals:
• User-friendly operation,
• Flexibility,
• Ease of integration with the switchboards,
• Freely selectable functions,
• A wide range of applications and
• Standardised communication.
The systems comprise of two separate devices:
• the base unit CSP2 and
• the operating/display unit CMP1:
All protection and control functions are completely
integrated into the self-operating CSP2. The base unit
is installed into the low-voltage niche (mounted on
mounting plate). The wide-range of power parts also
allows connection to all auxiliary voltage equipment
commonly used in MV systems.
The compact operating/display unit CMP1 is
decentralised and installed in the front door of the
circuit breaker field. The simple, menu-guided
operation, the large display with illuminated
background as well as the ergonomically designed
surface ensures that the operator of the system receives
fast and comprehensive information at all times. A
single bus/line has replaced the conventional cable .
Central and intelligent Protection and Control system CSP2
The self-operating base module CSP2 offers complete protection and control functions.
Capabilities and functions
The base unit CSP2 has the following special features:
• Compact design, with a robust synthetic housing in
accordance with protection class IP50,
• Wide ranging power supply (AC and DC),
• Wide ranging power supply for digital inputs (AC
and DC),
• Wide ranging power supply for control (DC),
• High/low voltage levels for digital inputs,
• A wide range of protection and control functions,
• Flexible management of inputs and outputs,
• Galvanically decoupled power outputs,
• Stand-alone operating mode of CSP2,
• Power outputs directly or indirectly driving the
switch elements (circuit breakers, isolators, earth
switches),
• Communication with SCADA systems via various
protocol types and optional interfaces (electrical or
fibre-optic),
• Various communication interfaces: CAN-Bus for
communication to multiple devices and RS232 for
connection to a PC/laptop.
• Highly efficient fault recording function (extended
memory is optional, non-volatile.)
• Comprehensive self-monitoring (hardware and
software),
• Two power categories of CSP2 as standard and
• Maintenance free.
Applications
The CSP2 is to be provided for various applications,
each with two different power categories as standard
version.
• CSP2-F3/L: This reasonably priced improved
systems starter are predominantly used for simple
feeder protection and is also used for the control
of a circiut breaker, as well as two other switching
devices, (disconnector and earth isolator). It is
possible to recognize up to 5 switchgears.
• CSP2-T25: This device is used for complexe
protection and control in the application field of
transformer differential protection.
The CSP2-T25 is especially developed for two
winding transformers and is able to switch up to 5
switchgears.
All CSP2 have a highly efficient disturbance recorder
function. Optionally, it is possible to store the
disturbance records fail-safe on an extended memory.
• Further applications of the CSP2-F3/L include
meshed electrical grids for selective direction
protection and for the control of other switching
devices.
• CSP2-F5: This highly performing feeder
management system is able to recognize and
control up to five switching devices. According to
higher requirements the CSP2-F5 provides a
larger number of digital inputs and signal relays.
The number of measuring inputs is the same as
with the CSP2-F3.
Design
The compact CSP2 incorporates all components
necessary for:
• Measured value recording and evaluation,
• Signal and command output,
• Entry and evaluation of binary signals,
• Data transmission and storage and
• Auxiliary power supply.
The housing of the CSP2 housing is made of very
robust synthetic material, which will withstand
environmental perturbations such as vibration, shock,
dirt, etc.
The upper circuit board tightly seals the housing, and
at the same time, serves as a connection. Mounted on
this board are all connections for the transformers,
digital inputs, signal relays, as well as the control
outputs. Below the cover of this board are the internal
current and voltage transformers, opto-couplers and
relays.
The housing is designed in such a way to guarantee a
specific protection (i.e. Protection Classifiation IP50).
The base unit CSP2 is fitted with internal measuring
transformers, which are supplied with analogous inputs
signals from the main current and voltage transformers.
The internal measuring transformers are galvanically
decoupled, analogously filtered and finally transmitted
to the analog/digital converter.
The CSP2 is equipped with a 24-Bit signal processor
for the protection functions and a high-power 16-Bit
controller for processing the control and
communication functions. Thanks to the digital signal
processing, the influences of higher frequency
compensation processes and DC components are
suppressed.
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