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
Circuit breaker types to control
Oil
Vacuum
SF6
Electromagnetic
Air-blast
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
Number of current clamps channels	2	1
Ability not to account which side of the circuit breaker is grounded
Power supply by built-in battery
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)
Time parameters control
Linear travel control of pole drive moving elements
Air circuit breaker valve flow check with rheostatic transducers
Automatic recalculation of DP21 transducer data into travel and speed parameters of contacts
Travel and speed parameters control in three phases simultaneously
Measurement of electromagnetic currents and voltages
Monitoring of the voltage of control current mains
Circuit breaker life test
Determination of pole contacts position
Check of position of contacts with the per-insertion resistors
Calculation of contact response time difference
Bouncing calculation
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
Tests of the circuit breaker trip-free release mechanism in the programmed complex cycles "O-C", "C-O", "O-C-O"
Circuit breaker repetitive trials test
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
Ability to create personal measurement template
The presence of a visual display for making adjustments, technical data analysis and measurement charts, without the use of a laptop		monochrome	LED, 128x64, graphs are not displayed on the instrument screen	LED, 128x64
Storage of measurement base in instrument memory
Independent operation of the instrument - without a laptop
Instrument control from PC (laptop)
Instrument control from mobile app (smartphone)			in developing	in developing
Technical analysis of digital and graphical data on PC (cursors, dimensional squeezing, graph settings, automatic parameter calculation)			in developing
Overlay function for visual analysis of data differences in PC			in developing
Measurements storage on a laptop and various databases maintaining			in developing - cloud server on PC	in developing - cloud server on PC