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Description
Monitoring the technical condition of high-voltage circuit breakers of all types and voltage classes from 6kV to 500kV The device provides control time, course and speed parameters of moving parts of oilу, vacuum, air, electromagnetic circuit breakers up to 20 breaks, as well as control of time characteristics of isolating switchs and short-circuiters. Additionally, PKV/U3.1 allows you to register instantaneous values of currents and voltages of operation electromagnets. Diagnostics of domestic and foreign circuit breakers PKV/U3.1 is complete with attachment devices for the installation of measuring transducers on all types of Russian- and foreign-manufactured high-voltage circuit breakers (ABB, AREVA, ALSTOM, SIEMENS, etc.). If attachment of linear movement transducer is not envisaged for high-voltage equipment, you can use angular transducer instead. The instrument will automatically recalculate angular movement transducer readings to the travel of contacts. A set for foreign-manufactured high-voltage circuit breakers (ABB, AREVA, ALSTOM, SIEMENS, etc.) is supplied on order.
Wide ranges of time intervals (up to 8.1 sec), speed (up to 20 m/sec) and travel measurement (up to 900 mm) For instance, the smaller time range of similar instruments does not allow for monitoring the operation of circuit breakers in compound cycles. There are a number of nuances at measurement performance. For example, while registering of time characteristics of any high-voltage circuit breaker is quite a simple process, receiving of travel and speed characteristics can be performed only with the use of special linear or angular movement transducers. Thus, if the advertisement of the instrument indicates that it can perform monitoring, for instance, of vacuum or oil circuit breakers but no transducer is included in the instrument kit, it means that monitoring of time characteristics only is envisaged. PKV/U3.0 is supplied with incremental (discrete) transducers for measurement of speed characteristics and travel parameters which do not require adjustment or correction of conversion factors; these transducers provide accurate results and are convenient in service. Instruments with wire rope transducers, for instance, have a limited upper value for speed. Pull-back spring of these transducers does not have enough time to reel the wire rope onto the drum in case of rapid change of speed and measurement results become less accurate. It is not recommended to use laser movement transducers as there is a risk of eye damaging by the laser beam in case of mishandling.
High measurement accuracy For measurements of speed characteristics and stroke parameters, high accuracy is provided by incremental (discrete) sensors of the type of angular and linear displacement with a resolution of 0.09 ° and 0.5 mm. The accuracy of the measurement of time characteristics is ± 0.1 ms. Often used in other devices (analogs of the PKV / U3.1 device) potentiometer type sensors have a more (up to ± 1%) error even under normal conditions. For example, with a maximum stroke of 900 mm, such an error gives an uncertainty of ± 9 mm.
Work with diagnostic results, device control and data transfer to PC The PKV / U3.1 device is an measuring unit. All commands are given to it remotely via a PC (laptop) and special software (software), and the device carry out all the calculations. Special software allows you: Maintain a database of measurement results; To operate the device from the computer; Store measurement templates; Display measurement results in tabular and graphical form; Automatically calculate switch parameters; Build charts and work with overlay tools; To make reports (protocol) of measurements; Print diagnostic data. Table of measured and automatic calculations of the technical characteristics of high-voltage circuit breakers All diagnostic results of the object are displayed on a PC (laptop) monitor in the form of a table with measured and calculated parameters for each cycle operation (when processing the results of measuring complex cycles, the device automatically breaks the cycle into simple operations). The tables provide data such as: Stroke parameters (full stroke, stroke to contact closure, stroke, difference of responses along the course, bounce along the course, flight, rebound); Time parameters (total time of circuit breaker closing, proper time of circuit breaker closing and pole turning on time); Speed parameters (speed when turned on, contact timing different times and time bounce). More detailed information on the status of the circuit breaker can be extracted from the recorded schedules In addition to tables with measured parameters, more detailed information about the state of the circuit breaker can be extracted from recorded schedules, which are operated with cursors, overlays and scaling through special software on a PC (laptop). The device is registered: relation between speed and time, speed and travel; relation between electromagnet currents and voltages, and time and travel; diagrams of contact opening-closing. For example, the condition of the guide system cannot be estimated without the availability of graphs of the processes of moving moving parts. In addition, it is difficult to determine from the numerical data which node is the reason for the delayed shutdown time. Here, the graph of the dependence of speed on the time of the shutdown process will give comprehensive information, since it can clearly divide the operating time of the drive from the operating time of the circuit breaker mechanisms. One of the functions of the software is the automatic overlay of motion diagrams of the traverse phases of the circuit breaker, which makes it possible to accurately recognize such serious malfunctions as backlash of the pole mechanisms. This is especially important for circuit breakers with one drive for three phases. It is impossible to notice such a malfunction using only numerical data.
Monitoring of high-voltage circuit breakers in simple and compound cycles PKV/U3.0 is equipped with a power switch for control of switching device drive with solenoid current of up to 35А (direct and alternating) which allows performing both simple switching close or switching open operations and compound cycles "Open-Close", "Close-Open", "Open-Close-Open". PKV/U3.1 is represented in two modifications One of the main characteristics of PKV/U3 is that it is produced in two modifications which differ in the number of channels of movement transducers (1 or 3) and number of channels of variable-resistance transducers monitoring (2 or 12): PKV/U3.1 and PKV/U3.0, correspondingly. Thereby, PKV/U3.1 allows monitoring of all types of air-blast circuit breakers, except for models VO-750, VO-1150, VNV-1150, which is available in the other instrument version.
Wide ranges of time intervals (up to 8.1 sec), speed (up to 20 m/sec) and travel measurement (up to 900 mm) For instance, the smaller time range of similar instruments does not allow for monitoring the operation of circuit breakers in compound cycles. There are a number of nuances at measurement performance. For example, while registering of time characteristics of any high-voltage circuit breaker is quite a simple process, receiving of travel and speed characteristics can be performed only with the use of special linear or angular movement transducers. Thus, if the advertisement of the instrument indicates that it can perform monitoring, for instance, of vacuum or oil circuit breakers but no transducer is included in the instrument kit, it means that monitoring of time characteristics only is envisaged. PKV/U3.0 is supplied with incremental (discrete) transducers for measurement of speed characteristics and travel parameters which do not require adjustment or correction of conversion factors; these transducers provide accurate results and are convenient in service. Instruments with wire rope transducers, for instance, have a limited upper value for speed. Pull-back spring of these transducers does not have enough time to reel the wire rope onto the drum in case of rapid change of speed and measurement results become less accurate. It is not recommended to use laser movement transducers as there is a risk of eye damaging by the laser beam in case of mishandling.
High measurement accuracy For measurements of speed characteristics and stroke parameters, high accuracy is provided by incremental (discrete) sensors of the type of angular and linear displacement with a resolution of 0.09 ° and 0.5 mm. The accuracy of the measurement of time characteristics is ± 0.1 ms. Often used in other devices (analogs of the PKV / U3.1 device) potentiometer type sensors have a more (up to ± 1%) error even under normal conditions. For example, with a maximum stroke of 900 mm, such an error gives an uncertainty of ± 9 mm.
Work with diagnostic results, device control and data transfer to PC The PKV / U3.1 device is an measuring unit. All commands are given to it remotely via a PC (laptop) and special software (software), and the device carry out all the calculations. Special software allows you: Maintain a database of measurement results; To operate the device from the computer; Store measurement templates; Display measurement results in tabular and graphical form; Automatically calculate switch parameters; Build charts and work with overlay tools; To make reports (protocol) of measurements; Print diagnostic data. Table of measured and automatic calculations of the technical characteristics of high-voltage circuit breakers All diagnostic results of the object are displayed on a PC (laptop) monitor in the form of a table with measured and calculated parameters for each cycle operation (when processing the results of measuring complex cycles, the device automatically breaks the cycle into simple operations). The tables provide data such as: Stroke parameters (full stroke, stroke to contact closure, stroke, difference of responses along the course, bounce along the course, flight, rebound); Time parameters (total time of circuit breaker closing, proper time of circuit breaker closing and pole turning on time); Speed parameters (speed when turned on, contact timing different times and time bounce). More detailed information on the status of the circuit breaker can be extracted from the recorded schedules In addition to tables with measured parameters, more detailed information about the state of the circuit breaker can be extracted from recorded schedules, which are operated with cursors, overlays and scaling through special software on a PC (laptop). The device is registered: relation between speed and time, speed and travel; relation between electromagnet currents and voltages, and time and travel; diagrams of contact opening-closing. For example, the condition of the guide system cannot be estimated without the availability of graphs of the processes of moving moving parts. In addition, it is difficult to determine from the numerical data which node is the reason for the delayed shutdown time. Here, the graph of the dependence of speed on the time of the shutdown process will give comprehensive information, since it can clearly divide the operating time of the drive from the operating time of the circuit breaker mechanisms. One of the functions of the software is the automatic overlay of motion diagrams of the traverse phases of the circuit breaker, which makes it possible to accurately recognize such serious malfunctions as backlash of the pole mechanisms. This is especially important for circuit breakers with one drive for three phases. It is impossible to notice such a malfunction using only numerical data.
Monitoring of high-voltage circuit breakers in simple and compound cycles PKV/U3.0 is equipped with a power switch for control of switching device drive with solenoid current of up to 35А (direct and alternating) which allows performing both simple switching close or switching open operations and compound cycles "Open-Close", "Close-Open", "Open-Close-Open". PKV/U3.1 is represented in two modifications One of the main characteristics of PKV/U3 is that it is produced in two modifications which differ in the number of channels of movement transducers (1 or 3) and number of channels of variable-resistance transducers monitoring (2 or 12): PKV/U3.1 and PKV/U3.0, correspondingly. Thereby, PKV/U3.1 allows monitoring of all types of air-blast circuit breakers, except for models VO-750, VO-1150, VNV-1150, which is available in the other instrument version.