Comparison of SKB EP high-voltage circuit breaker analyzers
Various methods are used to assess the condition of high-voltage circuit breaker, but the most convenient way of circuit breaker diagnostic is the use of specially designed instruments such as PKV/M15, PKV/M7 и PKV/U3.0 .
PKV group instruments application significally reduces the time of the complete diagnostic with a considerable increase in its quality and allows you to avoid the necessity of major maintenance.
PKV/U3.0 | PKV/М7 |
PKV/М15 expert modification |
PKV/М15 basic modification |
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Circuit breaker types to control | |||||||
Oil |
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Vacuum |
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SF6 |
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Electromagnetic |
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Air-blast |
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General characteristics | |||||||
Number of discrete channels for circuit breaker contacts monitoring | 20 | 4 | 3 | 3 | |||
Number of movement transducer channels | 3 | 1 | 1 | 1 | |||
Number of variable-resistance transducer channels | 12 | 1 |
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Number of current clamps channels |
2 | 1 |
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Ability not to account which side of the circuit breaker is grounded |
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Power supply by built-in battery |
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PC connection | RS-232, LAN | USB host, LAN, RS-232, RS-485 | USB, Bluetooth, cloud server on PC | USB, Bluetooth, cloud server on PC | |||
Operating temperature range, ºC | -15...+40 | -20...+40 | -20...+55 | -20...+55 | |||
Dimensions,mm | 300х140х400 | 360х290х165 | 165х100х60 | 165х100х60 | |||
Instrument weight, kg |
10 |
7 | 1 | 1 | |||
Functions | |||||||
Triggering by closing and opening dry contacts (control of BB-TEL and similar type of circuit breakers) |
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Time parameters control |
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Linear travel control of pole drive moving elements |
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Air circuit breaker valve flow check with rheostatic transducers |
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Automatic recalculation of DP21 transducer data into travel and speed parameters of contacts |
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Travel and speed parameters control in three phases simultaneously |
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Measurement of electromagnetic currents and voltages |
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Monitoring of the voltage of control current mains |
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Circuit breaker life test |
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Determination of pole contacts position |
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Check of position of contacts with the per-insertion resistors |
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Calculation of contact response time difference |
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Bouncing calculation |
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Control module block and circuit breaker test requirements (according to RD 34.45-51.300-97) | |||||||
Maximum switching test current, A | 35 | 14 | 20 | 20 | |||
Tests of the circuit breaker trip-free release mechanism in programmed simple close (C) or open (O) operations |
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Tests of the circuit breaker trip-free release mechanism in the programmed complex cycles "O-C", "C-O", "O-C-O" |
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Circuit breaker repetitive trials test |
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Technical characteristics | |||||||
Measuring and recording range of time intervals, s | 0,0004 ÷ 8 | 0,001 ÷ 5,2 | 0,001 ÷ 10 | 0,001 ÷ 10 | |||
Measuring range of speed, m/s | 0,002 ÷ 20 | 0,002 ÷ 20 | 0,002 ÷ 20 | - | |||
Measuring range of linear movement, mm | 0,5 ÷ 900 | 1 ÷ 900 | 1 ÷ 900 | - | |||
Measuring range of angular movement, º | 0,09 ÷ 360 | 0,09 ÷ 360 | 0,09 ÷ 360 | - | |||
Interface and PC software | |||||||
Built-in measurement templates for specific circuit breaker models |
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Ability to create personal measurement template |
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The presence of a visual display for making adjustments, technical data analysis and measurement charts, without the use of a laptop |
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![]() monochrome |
![]() LED, 128x64, graphs are not displayed on the instrument screen |
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Storage of measurement base in instrument memory |
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Independent operation of the instrument - without a laptop |
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Instrument control from PC (laptop) |
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Instrument control from mobile app (smartphone) |
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Technical analysis of digital and graphical data on PC (cursors, dimensional squeezing, graph settings, automatic parameter calculation) |
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Overlay function for visual analysis of data differences in PC |
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Measurements storage on a laptop and various databases maintaining |
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