Distance Protection
SPRECON-E-P DD6
Distance protection is the main function of the SPRECON-E-P DD..6 series. The devices are convincing in their highly developed and economically optimised modular design. The thin detachable HMI control panel allows easy mounting (i.e. to cublicle doors).
The full-graphical LCD features clear indication of measured-values and comfortable handling as well as analysis.
Areas of application
The SPRECON-E-P DD..6-2 devices are multifunctional devices for protection, control and automation of energy stations. They can be applied as main protection units of overhead power transmission lines and cables of all grids and neutralpoint connections at medium or high voltage levels.
Control of the circuit-breaker (connect/disconnect) acts as a 3-pole automatic reclosing procedure. The devices can be also used as back-up protection for overhead lines or cables. Furthermore, they can be applied as back-up protection for other primary systems such as transformers and busbars. The integrated starting methods with simultaneous impedance monitoring of the six measuring loops guarantee high selectivity and sensitivity for all loading cases.
The implementation of standard and proprietary protocols allows close collaboration with controlling systems of various manufacturers. All necessary protection and control functions are integrated in the devices.
Operating
In order to meet the requirements of efficient system management, all operations can be accomplished with the detachable HMI control panel. Hence, protection configurations can be locally carried out beside usage of the operating program SPRECON-E COMM-3.
All relevant information about processes and devices is shown on the full-graphical display of the control panel. Additionally, freely configurable LEDs are available for signalling.
Separated navigation keys allow clear user guidance through the various pages and submenus. Furthermore, they facilitate simple configuration of extensive protection and control functions.
The protection devices feature all functions which are relevant to outgoing feeders. In addition to overcurrent and underimpedance starting, the distance protection devices feature voltage-dependent overcurrent starting.
Beside approved protection algorithms, measuring algorithms and protection functions, other important extensions have been accomplished:
- New protection functions such as voltage / frequency protection, treatment of intermittent earth-faults, Q-U < protection, residual current correction etc.
- Higher accuracy
- More zones for signalling as well as tripping
- 4 switchable characteristics sets
- Comprehensive testing and commissioning aids
- Selectable minimum relay durability for meeting external requirements
- Combinatorial and sequential logics for virtual binary inputs (no programming skills required)
- Logic operations for output relay applications
- Circuit-breaker control as an option
High space-saving ist achieved by compact arrangement of the device modules. Another option, of course, is to put them together in a medium-sized case.
The SPRECON-E-P DD..6-2 devices are one-box solutions for protection and control, which allow protection of primary equipment by simultaneously accomplishing control and monitoring functions in electric power systems. The distance protection acts as the main protection function.
The multifunctional SPRECON-E-P DD..6-2 devices can be used for various protection and control applications due to the wide range of implemented functions. They feature a clear separation of control and protection functions which allows either combined or separated operations of control and protection functions:
- Separated data models
- Separated control and protection firmware
- Separated control and protection configuration
- Separated passwords
- No testing of protection function at feeder nor primary circuit disconnection required on updating control parameters or firmware
In addition to the pure protection devices (SPRECON-E-P D..6-1), the combination devices (SPRECON-E-P D..6-2) can be upgraded with various input/output modules:
- Measuring transducer module
- Analog input module (0-20mA)
- Analog output module (0-20mA)
- Digital input module
- Digital output module
- Digital input / output module
- Redundant power supply unit
The combination units are available in medium or large housings with ten or twenty-one plug-in slots.
Configuration
All functions can be configured separately. By separating protection configuration from control configuration, all different kinds of requirements of different applications can be met. The protection-specific functions are separately configured or deactivated depending on the respective application. Irrelevant functions are hidden and inactive which allows simple and structured configuration of the devices.
All configured bays are type-oriented stored in a database. They can be therefore copied and re-used as well as easily re-adapted, which facilitates configuration of large-scale systems.
