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MA-037 - CB Watch 3 Operating Manual 

v7.0 - May 2020 

Page 48 of 118 

The imperial unit output is different than for metric units. It is in psig (psi gauge) and it is a 

“relative” value as it is 

most often used in that way in non-metric regions. So, this is the 

same value as will be displayed by a gauge and there is no issue comparing them here. 

 

Gas pressure alarms 

Since all the nameplate values are usually given as gas pressures at 20

o

C, it is against this 

value that thresholds for alarms are entered. 3 standard thresholds are available: 

▪

 

Threshold 1 

“

nearly too low

”: 

when the pressure falls below this threshold, the CB is 

still capable of fulfilling its function, but a gas refill action is required urgently to 
prevent threshold 2 being reached. 

▪

 

Threshold 

2 “

lock-out

”: 

when the pressure falls below this threshold, the CB is no 

longer capable of fulfilling its function. Depending on configuration, when this 
threshold is reached, the CB either is locked closed or opens automatically first. 

▪

 

Threshold 

3 “Overfilling”: 

Used to indicate when the gas pressure in the CB is too 

high and there is a risk of overpressure at elevated temperature. 

Each of the thresholds has a decreasing pressure threshold (minimum) and an increasing 
pressure threshold (maximum) to take care of hysteresis. 

The figure hereafter illustrates the passage of the various thresholds with their hysteresis 
during the changes in gas density:  

 

 

Figure 65 

–

 Gas thresholds min/max 

 
The thresholds are entered in the HMI under the settings section.  

 

 

Содержание CB Watch 3

Страница 1: ...MA 037 CBW3 Operating Manual v7 0 May 2020 GE Grid Solutions CB Watch 3 Circuit Breaker Monitoring System Operating Manual ...

Страница 2: ...STATUS OVERVIEW 20 General Description 20 Risk Indexes 21 Risk Index Alarms 23 Risk Index History 23 Recommendations 24 OPERATION TIMING MONITORING 25 Introduction 25 Functionalities available Without Travel Sensor 25 Additional Functionalities With Travel Sensor 34 Timing Compensation 39 Setting Alarms 41 SF6 GAS Level MONITORING 44 General Description 44 Gas Measurements 47 Setting Alarms 57 CON...

Страница 3: ...tion 99 Ambient Temperature 100 Heater Temperature 101 Setting Temperature Alarms 102 GENERIC ANALOGUE CHANNEL MONITORING 104 General Description 104 Configuration 104 Alarms 105 DRY CONTACT RELAY ALARMS 106 General Description 106 Available Alarm Relays 106 Alarm Relay Assignment 107 Clearing Alarms 108 DIGITAL COMMUNICATION 110 Communication Protocols 110 Integration with Perception Fleet softwa...

Страница 4: ... display 22 Figure 22 Risk Index thresholds 23 Figure 23 Risk Index alarms 23 Figure 24 Log of Risk Index changes pt1 24 Figure 25 Log of Risk Index changes pt2 24 Figure 26 Download of Risk Index changes 24 Figure 27 Number of opening closing operation 25 Figure 28 Initial setting of number of operations 26 Figure 29 Setting operation counter thresholds 26 Figure 30 Operation counter alarms 26 Fi...

Страница 5: ...asurements 47 Figure 65 Gas thresholds min max 48 Figure 66 Gas pressure thresholds 49 Figure 67 Gas pressure alarms 49 Figure 68 Gas liquefaction pressure 49 Figure 69 Gas liquefaction risk alarm 50 Figure 70 Gas moisture level 50 Figure 71 Moisture alarm threshold 50 Figure 72 Excessive moisture alarm 51 Figure 73 Linear gas pressure extrapolation 51 Figure 74 Forecasted gas pressure values 52 F...

Страница 6: ...ist of previous archives 74 Figure 116 Maximum mean current threshold settings 74 Figure 117 Coil charge alarms 74 Figure 118 Coil charge threshold settings 74 Figure 119 Coil charge alarms 75 Figure 120 Coil resistance value 75 Figure 121 Historical coil mean current charts 75 Figure 122 Coil circuit continuity alarm 76 Figure 123 Control circuit monitoring alarms 77 Figure 124 DC voltage default...

Страница 7: ...own list of previous archives 96 Figure 164 Scaling graphs 96 Figure 165 COMTRADE files 97 Figure 166 Visualising a COMTRADE file 98 Figure 167 Number of PT100 sensors 99 Figure 168 Naming of PT100 sensors 99 Figure 169 Display of PT100 sensors 99 Figure 170 Ambient temperature 100 Figure 171 Last operation temperature measurements 100 Figure 172 Thresholds for measured temperatures 101 Figure 173...

Страница 8: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 8 of 118 Figure 190 uploading a product or system file 113 ...

Страница 9: ...how they can be used to monitor a high voltage circuit breaker All outputted information is detailed as well as all the possible alarms that can be set Communication and system settings are also covered Please refer to the CBWatch3 Installation Manual for information on the various modules and sensors comprising the CBW3 system It provides all the necessary information to install and connect them ...

Страница 10: ...nstallation Manual Figure 1 CBW3 Modules 1 Power supply 5 AI8 2 Module 2 ProWatch Module 6 AI8 3 Module 3 DI16 Module 7 RTD8 Module 4 AI8 1 Module 8 DO16 Module Sensors Depending on your CBW3 configuration various sensors are connected to the modules either directly or through terminal blocs These sensors acquire the data from the circuit breaker so that it can be received by the corresponding I O...

Страница 11: ...happens every hour by default Otherwise manually by someone resetting the time using the HMI Keep that in mind For more details refer to the CBWatch3 Installation Manual Note that every 3 hours the date and time is written to a file If the system loses power for longer than the super capacitor can hold the system will indicate Warning RTC data corrupted in the system log If no automatic time synch...

Страница 12: ...ts the user configure the system set alarms and visualise all the measured parameters the alarm status and the curves graphs recorded in memory TCP IP configuration Before you can access the CBW3 s HMI you must first configure your network adapter Open Network Connections by clicking the Start button and then clicking Control Panel In the search box type adapter and then under Network and Sharing ...

Страница 13: ...d to set your network adapter to another address on that network for example 192 168 5 30 The last number 30 in this example could be between 1 and 254 except for 22 which is the CBW3 address To do that select Use the following IP address and enter The IP address 192 168 5 30 The sub net mask 255 255 255 0 You can leave the DNS server settings blank Then click OK Figure 5 Network card configuratio...

Страница 14: ... 100Mbs SFP module actually work Please contact GE to acquire a correct and tested SFP module Figure 7 Connection to the CBW3 Alternatively connect onto or VPN into the same network as the one the CBW3 is on Launch any Internet browser Google Chrome in this example but preferably not Internet Explorer which is old and has compatibility issues and enter the CBW3 s IP address in the address line 192...

Страница 15: ... possible to save the IP address into your browser and tell it that it is trusted so that the message will not appear next time Note 2 It is also possible to upload your own official secure SSL certificate into the CBW3 that your network will recognise to avoid this error message This can be done in the System Upload page under the Security section Figure 10 HMI SSL upload For more detail please r...

Страница 16: ...age of the HMI 2 Username supervisor Default password supervisor Only parameters for setting alarms are adjustable It is possible to download Comtrade files 3 Username specialist Default password specialist All of the parameters relative to the application are adjustable In particular all those required for setting up the system Changing Passwords Passwords can be changed for each username access ...

Страница 17: ...ill use Click on the required flag first and then click on any section of the top toolbar the language will automatically change Figure 13 HMI language selection Currently the following languages are supported English Spanish French Brazilian Portuguese For the pages that are most commonly used Measurements and Overview pages only Firmware version Please note that this Operating Manual may discuss...

Страница 18: ...tabs in the secondary menu toolbar Figure 14 HMI secondary toolbar for System section From now on in this Operating Manual the steps needed to reach any screen shown will be highlighted in black above the screen as per the example below As an example if you wanted to visualise the firmware versions being used you would select the System section first and then the Product info tab HMI System Produc...

Страница 19: ...ustment of a parameter can take effect it first needs to be validated and stored by pressing the Set or Change button in the corresponding sub section Figure 16 Set button example Note that while most changes will take place as soon as you press Set sometimes the system will ask you to reboot after a big change or will do it itself In particular it is essential to reboot the system after any major...

Страница 20: ...verview of the CBWatch3 the circuit breaker and all its functions that are being monitored HMI Overview Summary Figure 17 Overview Summary page The following information is displayed CBWatch3 information Serial number of the CBW3 Substation designation host name Status any internal alarms Circuit breaker information Number of open close operations cycles performed Date and time of last CB operatio...

Страница 21: ... overall operation of the circuit breaker or with a particular function of the CB that is being monitored While each monitoring function will be reviewed in detail in this manual an overall assessment is provided by the corresponding Risk Index We have defined the risk levels from 1 to 5 with the following definitions and colour coding Figure 19 Risk Index legend If one of the following functions ...

Страница 22: ...it reflects the overall state of the CB and is based on the worst of the individual monitored functions RI HMI Overview Summary Figure 20 Risk Index display Risk indexes are derived from the CB nameplate values common sense and alarm thresholds set by customers The risk evaluation takes into account the severity of the issue detected and the consequences to the safe and reliable operation of the c...

Страница 23: ...related to Risk Indexes section Alarms are also available through registers that can queried through the various communication protocols HMI Measurements Alarms Figure 23 Risk Index alarms Risk Index History Every time as functional Risk index changes the change is time stamped and recorded in the risk Index log This way the history and order of key events is preserved The following information is...

Страница 24: ...hanges pt2 This is all displayed in the HMI The whole history of the RI changes can be downloaded as a CSV file spreadsheet by pressing the Download as CSV button below the log to first generate the file creation and then by double clicking on the file name that appears to download the file HMI Overview Recommendations Figure 26 Download of Risk Index changes More information on all the functions ...

Страница 25: ... the first is by far the most common Functionalities available Without Travel Sensor Number of operations For each pole the following information is recorded date and time of the last opening and closing operation time elapsed since the corresponding previous close open operation cumulative number of opening and closing operations performed HMI Measurements Last opening results or Last closing res...

Страница 26: ...cts status The 52a 52b auxiliary contacts are proximity switches that are there to reflect a direct image of the circuit breaker position and indicate the status of the circuit breaker 52a aux contact is ON when CB is CLOSED and OFF when CB is OPEN 52b aux contact is OFF when CB is CLOSED and ON when CB is OPEN HMI Measurements Sensors Figure 31 Auxiliary contact status If for any one pole the 52a...

Страница 27: ...from all the sensors for a period of 0 3s 300ms When a current flowing to the coil is detected the system then samples every 0 4ms for 300ms we get a total number of sample of 300 0 4 750 By analysing the data from the 52a and 52b contact during this sampling period we determine the type of operation that has occurred using the following rules If the system sees a Closing operation first it will c...

Страница 28: ...open close command received and the 52a contact changing status Auxiliary contact 52b switching time Time elapsed between open close command received and the 52b contact changing status A graph is available showing the contact status change for each pole HMI Measurements Operations Charts Opening and Closing Figure 36 Auxiliary contact opening and closing graphs An alarm is raised if after an oper...

Страница 29: ... of the close command appearance of current on the control circuit The Reaction time t1 between the close command and the moment where the CB leaves the open position and the 52b auxiliary contact changes status The Operation time t2 between the close command and the moment where the CB arrives in the closed position and the 52a auxiliary contact changes status Figure 38 Operating time measurement...

Страница 30: ...act switching time and similarly for closing times Discordance between poles IPO CB only With an IPO CB when all poles are operated simultaneously the opening and closing operation timing are compared for each pole and any differences are highlighted The discordances are the timing differences pole to pole A B A C C B The maximum discordance is also recorded also referred to as discrepancy There w...

Страница 31: ...Closing Figure 42 Entry of key distances The difference between these two positions C O in this example 120 15 105mm is usually 80 of the stroke of the circuit breaker This stroke information will be found in the CB manual It is assimilated to the travel distance and the contact separation speed is calculated by dividing this distance by the opening travel time t2 t1 which has been recorded Becaus...

Страница 32: ...le discordance Closing all CB Minimum and maximum Reaction time t1 per pole Minimum and maximum Operation time t2 per pole Minimum and maximum Travel time t2 t1 per pole Closing IPO CB only Maximum t1 pole to pole discordance Maximum t2 pole to pole discordance Maximum t2 t1 pole to pole discordance The threshold values can be entered during setup here HMI Settings Opening and Settings Closing Fig...

Страница 33: ...following historical graphs are available with a point for each opening or closing operation Reaction time t1 for each pole Operating time t2 for each pole Contact separation speed for each pole DC voltage source 1 and 2 Ambient temperature The last two are provided to spot if voltage or temperature had an obvious effect on a particular historical value measured The graphs can be found in the Oper...

Страница 34: ...re 47 Entry of travel distances Using the travel sensor information Because we have a travel sensor we get real time information on the position of the contacts during opening and closing operations As the sensor passes one of the pre defined position setup in the section above then the system records the time and uses this value for calculations For each opening operation and for each of the pole...

Страница 35: ... of 118 Operation Graphs A distance vs time graph is recorded during each operation and stored HMI Measurements Operations charts Opening Figure 48 Operation graphs for opening HMI Measurements Operations charts Closing Figure 49 Operation graph for closing ...

Страница 36: ... Monitoring the auxiliary contacts Since the travel sensor displacement limits min and max in mm for the physical open and closed positions have been entered in the setup see 5 3 1 an alarm is then raised if the travel sensor position is not within these limits HMI Measurements Alarms Figure 51 Alarms from monitoring the auxiliary contacts Close position alarm Despite what 52a auxiliary sensor ind...

Страница 37: ... point reached during the operation The final resting position at the end of the operation as measured by the travel sensor and shown on the travel curve Figure 52 Monitoring the overtravel HMI Measurements Last opening results and Last closing results Figure 53 Overtravel display An alarm threshold can be entered for the maximum overtravel HMI Settings Operations monitoring Figure 54 Setting the ...

Страница 38: ...ing Manual v7 0 May 2020 Page 38 of 118 An alarm is raised if during an opening or closing operation the overtravel value measured exceeds the Max overtravel threshold entered HMI Measurements Alarms Figure 55 Overtravel alarm ...

Страница 39: ...be taken into account and compensated for before triggering an alarm if the timing limits have been set very tight This is to avoid false alarms These compensations can be activated or not both for opening and closing operations depending on the availability of the necessary compensation information The information required is detailed below and requires filling in a table during setup Data for co...

Страница 40: ...time temperature compensation values Effect of DC supply voltage The control line voltage compensation depends on the actual DC voltage being supplied to the coil when the command is sent compared to the nominal DC voltage It requires the presence of the DC voltage measurement sensor to provide the measured DC voltage information required The coil voltage compensation is computed by shifting the a...

Страница 41: ...me per pole No Yes Yes Opening reaction time t1 per pole Yes Yes Yes Yes Opening operation time t2 per pole Yes Yes Yes Yes Opening travel time t2 t1 per pole Yes Yes Yes Yes Opening reaction time t1 discordance No Yes Yes Yes Opening operation time t2 discordance No Yes Yes Yes Opening travel time t2 t1 discordance No Yes Yes Yes Opening contact separation speed per pole Yes No Yes Yes Closing re...

Страница 42: ...aration and touching speed Contact separation speed distance travelled opening travel time Contact touching speed distance travelled closing travel time Required data with travel sensor present When a travel sensor is present and used the following distances in mm are required by the system The timing is measured when the travel sensor reaches these positions A Open position Always 0mm as we start...

Страница 43: ...osing Reaction time discordance Opening Closing Operation time discordance Opening Closing Travel time discordance Data is usually available from the CB Operating Manual A typical discordance threshold value would be 3 5ms but it depends on the CB type and state Opening contact separation speed per pole Data is usually available from the Operating Manual or FAT Typical values would be between 2 an...

Страница 44: ...as to avoid SF6 gas emissions to the atmosphere and thus reduce cost avoid penalties and save the environment Measurement principle Because gas pressure varies with temperature see figure below pressure values cannot be compared over time unless they are temperature compensated The variation of pressure with temperature is linear in the range of service 25oC to 50oC Temperature independent compari...

Страница 45: ...ses communication with the gas sensor it retries communication up to 5 times If there is still no answer from the digital sensor then the sensor power supply is turned off and on again to reset the communication protocol A counter is kept of the number of no answer The reset procedure may be repeated 3 times before the sensor is declared faulty and the Sensor absence alarm is raised HMI Measuremen...

Страница 46: ...rm stack XXX short horizon minutes x 2 5 10 values Long term stack XXX long horizon days x 2 5 values The status of the stack fill is displayed in the HMI See Figure 61 Gas sensor information When there are not enough data points received to date to calculate the short or long term trend then the corresponding stack not enough alarm flag is See Figure 62 Gas sensor alarms The values requiring data...

Страница 47: ... be seen above the display can be set see setup instructions in the Installation Manual to either show pressures in Metric units bar absolute pressure in tank or Imperial units psig psi gauge pressure relative to atmospheric pressure The gas sensor records the absolute value of the pressure inside the gas chamber and outputs it digitally in bar This is what is shown in the HMI for metric units If ...

Страница 48: ...ts function but a gas refill action is required urgently to prevent threshold 2 being reached Threshold 2 lock out when the pressure falls below this threshold the CB is no longer capable of fulfilling its function Depending on configuration when this threshold is reached the CB either is locked closed or opens automatically first Threshold 3 Overfilling Used to indicate when the gas pressure in t...

Страница 49: ...he SF6 gas will change from gas phase to liquid phase At normal ambient temperature the liquefaction pressure is very high and is not a problem but when the temperature falls below freezing the liquefaction pressure gets closer to our operating pressure range Therefore if the gas temperature falls below 3oC 37 4oF the liquefaction pressure for the gas or gas mixture at 20oC is displayed so that it...

Страница 50: ...in the gas is continuously displayed in the HMI HMI Measurements Gas Figure 70 Gas moisture level The moisture level is indicated in ppmv parts per million by volume This is the units most commonly used and quoted in the IEC standard 62271 1 This value represents one million times the ratio of the volume of moisture water vapor present in the gas to the total volume of the gas including water vapo...

Страница 51: ...corded every day These values are used to calculate a linear extrapolation forecast of the pressure in the future at the end of either the short term or long term time horizon that was set Short term extrapolated pressure at 20 C future value computed using linear regression and a history of 2 5x the short term horizon in minutes that has been set Long term extrapolated pressure at 20 C future val...

Страница 52: ...p For long term gas pressure trend calculations the equivalent gas pressure at 20 C is recorded every night at 2 AM This allows for consistent conditions and the removal of external influences such as variations in line load or solar radiation For the short term trend the recordings are taken much more frequently and will show greater sensitivity to external influences It is therefore much more di...

Страница 53: ... per hour in the short term using short term stack Gas pressure unit per year in the long term using long term stack Gas mass unit per year in the short term using long term stack Gas volume per year in the long term using long term stack for one or three separate tanks depending on the number of sensors installed HMI Measurements Gas Figure 77 Gas leak rates Remember that If not enough data is av...

Страница 54: ...essure Nominal fill gas pressure Initial gas mass Nominal fill gas mass per tank so the total mass divided by 3 if there are 3x tanks These values are available from the CB name plate Figure 78 Typical CB nameplate with gas info HMI Settings Gas monitoring Figure 79 Nominal gas values entry Since we know the density of the gas at 20oC that goes with these 2 nameplate information and since we also ...

Страница 55: ...ngs Gas monitoring Figure 80 Gas leak rate thresholds The leak rate alarms are displayed with the other gas alarms HMI Measurements Alarms Figure 81 Gas leak rate alarms Historical Graphs On the HMI you can view graphs displaying the history of the key gas parameters Using the drop down menu you can select either Short term graphs with resolution of 1 value every 10 minutes Long term graphs with r...

Страница 56: ...t 20oC Gas temperature Gas moisture level HMI Measurements Gas Short term Figure 83 Short term gas graphs gas density You can adjust the time span on all the graph s X axis narrow down the time span to focus on a period by selecting highlighting it with your mouse HMI Measurements Gas Long term Figure 84 Long term gas graphs gas pressure ...

Страница 57: ...This table summarises all the alarms that can be set in terms of SF6 gas monitoring Required data The data required to set alarm thresholds is readily available from the CB operating manual or from the CB s name plate Figure 85 Name plate data Min Alarm Max Alarm Digital Relay Gas pressure at 20 C Yes 2x Yes Yes Yes Gas liquefaction risk Yes No Yes Yes Gas moisture level No Yes Yes Yes Gas short t...

Страница 58: ... lock out pressure If a key concern is to ensure that any gas leak is detected as early as possible so that it can be fixed before too much gas is lost then the warning level threshold T1 above could be set to show T1 A small decrease below nominal pressure to alert that there is a leak closer to nominal and further away from the warning level of the density meter One should always use the maximum...

Страница 59: ...leak rate Government or corporate gas leak targets are usually set in yr for example 5 yr So to meet this target you would need to make sure that you were notified of any important leak For this you may want to set your alarm at 2 per year if you have a young fleet of CB that don t leak much If on the other hand all your CB are old and leaking you may want to increase this level to show you the re...

Страница 60: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 60 of 118 Figure 87 Example settings ...

Страница 61: ...ive total for normal opening operations is important especially for frequently operating breakers what is more damaging to the contacts are the opening under fault current triggered by the protection relays In these cases the fault current and therefore the corresponding i2T values can be 10 or up to 100 times larger and the erosion of the contacts magnified Some breakers may only be able to opera...

Страница 62: ...lowing the command to the coil the minimum and maximum peak current values Imin and Imax are determined The value of the interrupted current is calculated using the equation Irms Imax Imin 2 2 Figure 90 Current before and during interruption This RMS interrupted current value for each pole is displayed in the HMI HMI Measurements last opening results Figure 91 Interrupted current value ...

Страница 63: ...CB FAT and type tests we know the original time offset between when the CB starts to open 52a and when the arcing contacts physically separate We must rely on this separation time offset ts t1 which we input during the setup based on FAT measurement data from the manufacturer of the CB It can be set differently per pole but is usually the same HMI Settings Opening Figure 92 Separation offset input...

Страница 64: ...e Arcing time alarm To receive a warning when the breaker is not interrupting the arc fast enough and the arcing time is too long an alarm can be set against a maximum threshold HMI Settings Opening Figure 96 Max arcing time threshold Any alarm raised can be seen in the HMI HMI Measurements Alarms Figure 97 Max arcing time alarm To avoid false alarms if Z described above is less than 0 25 of the m...

Страница 65: ... time Ts and until definitive extinction of the current time Ta we cumulate the squared amps interrupted by the circuit breaker to estimate the electrical deterioration induced by the operation We do that independently for each phase pole Electrical contact wear per operation Irms i t 2dt The function above is set by default to f Irms 1 for all Irms values The calculated value above represents the...

Страница 66: ...en we are approaching the time when the arcing contacts need to be replaced due to wear a comparison is made between the cumulative electrical wear and the maximum value specified by the manufacturer of the arcing contacts used Alarms can be set per pole and with two threshold values Threshold 1 a warning level approaching contact wear limit Threshold 2 an alarm level contacts need to be replaced ...

Страница 67: ...Operations Charts section HMI Measurements Operations charts Opening Figure 103 Cumulative arcing contact wear graph Non linear contact wear To account for the case where the electrical wear is not linear higher wear at lower currents for examples the function above can be modified and act as a magnifying or reducing factor for a given amp rating by entering a coefficient greater than 1 0 or small...

Страница 68: ...ng contact manufacturer s recommendations and based on the operational planning lead time required to purchase new ones and go replace them T1 approaching contact wear limit for example 120 KA2s T2 contacts need to be replaced for example 150 KA2s When installing on an already operational CB we may need to enter during setup an estimate of the cumulative electrical wear to date This is very tricky...

Страница 69: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 69 of 118 HMI Settings Opening Figure 106 Contact wear alarm thresholds ...

Страница 70: ...is can occur when the DC power is supplied by substation batteries not in optimal shape and when several operations are taking place at the same time With the appropriate sensor installed the CBW3 can continually monitor DC voltage source 1 and DC voltage source 2 if present that supply the coil circuit voltage The values are displayed in the HMI HMI Measurement Sensors Figure 107 Continuous displ...

Страница 71: ... Charts section HMI Measurements Operations charts Opening or Closing Figure 111 DC voltage drop graph This can provide valuable information about the coil status if the coil current is not being monitored Coil Integrity Coil current With the appropriate CTs installed the CBW3 can measure the current passing through each coil during an opening or closing operation This is useful data to measure th...

Страница 72: ...rrent and actuation time it is the area under the coil current vs time curve and is the integration of the current multiplied by the time A x ms The diagram below shows that the coil actuation charge can be longer green curve if the latch is sticking for example and the CB does not start moving as early as on the pink normal curve A damage coil will also show a higher current and a longer coil cha...

Страница 73: ... Data is recorded for 300ms acquisition time and a coil current vs time curve is displayed in the HMI and stored HMI Measurement Operations charts opening or closing Figure 114 Graph of coil current during opening or closing operation The current curves from the last operations are stored so the user can review and compare any previously saved curve using the drop down menu ...

Страница 74: ... closing if the coils are different HMI Settings Analog channels Figure 116 Maximum mean current threshold settings The resulting alarms are displayed in the HMI HMI Measurements Alarms Figure 117 Coil charge alarms Coil charge Alarms thresholds can be set during setup on Minimum and maximum coil charge when opening Minimum and maximum coil charge when closing HMI Settings Analog channels Figure 1...

Страница 75: ...ange If the resistance comes down then the coil is degrading HMI Measurements Last opening closing results Figure 120 Coil resistance value Historical graphs Graphs that display the history of the values recorded are available They provide an easy visual method of spotting variations and trends in the recorded values over time The following historical graphs are available with a point for each ope...

Страница 76: ...tations with older relays If present the optional TCW continuity monitoring sensor injects a small current in the control line at either side of each coil below the level needed to actuate the coil in order to continually check that the coil is not open circuit The sensor has 3 channels and returns a digital true false signal as to the good state of the coil If at least one coil goes open for 10s ...

Страница 77: ...n determine the minimum and maximum values of the mean coil current recorded We can use them as shown in the table below to calculate the max threshold for both opening and closing operation Opening Closing Nominal DC Voltage A Coil resistance C D Max mean coil current A C x 100 p 100 A D x 100 p 100 Figure 125 Mean coil current max threshold calculation Min Alarm Max Alarm Digital Relay Coil circ...

Страница 78: ... below to calculate the min and max coil charge for both opening and closing operation Opening Closing Minimum Maximum Minimum Maximum Coil current A B C D Time E F G H Coil charge AxE x 100 p 100 BxF x 100 p 100 CxG x 100 p 100 DxH x 100 p 100 Figure 127 Coil charge alarm threshold calculation Where a percentage p margin is subtracted from the lowest figure or added to the highest figure observed...

Страница 79: ...stops the rewinding motor In IPO CB there are 3 separate motors The springs are rewound quite quickly measured in seconds With a pneumatic hydraulic mechanism enough pressure is stored in a tank to enable several operations The pump motor starts whenever the pressure in the storage tank falls below a certain level When the required pressure is built up again then a contact is triggered and stops t...

Страница 80: ...n time hours has been reached The number of times the motor starts is also recorded but it is the same as the number of closing operations so is not very significant with a spring drive HMI Measurements Last closing results Figure 131 Spring rewind data When installing in a retrofit situation the initial value for the counters can be entered HMI Settings Closing Figure 132 Spring motor initial val...

Страница 81: ... more torque or a problem with the motor itself Both the mean average motor current and the maximum motor current peak inrush current are recorded and displayed in the HMI HMI Measurements Last closing results Figure 135 Spring rewind motor current data An alarm can be set on the maximum inrush current value of the motor by setting a Max threshold value HMI Settings Analog channels Figure 136 Spri...

Страница 82: ...MI the user is also able to display the previous curves saved in the CBW3 Figure 139 Drop down list of previous archives Historical graphs In addition the following historical graphs are also available for Mean motor current value measured Maximum inrush motor current value measured Spring rewinding time measured Outside ambient temperature when these measurements were made These graphs enable use...

Страница 83: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 83 of 118 HMI Measurements Operations charts Spring Figure 140 Operation charts for spring rewind ...

Страница 84: ...anism alarms Alarm thresholds Spring rewind time Data is usually available from the Operating Manual A possible value could be 25s but it depends on the CB type Cumulative spring rewind motor run time Data is usually available from the motor s maintenance manual A possible value could be 12 000 min 200 hr but it depends on the motor type Peak spring rewind motor current Data is usually available f...

Страница 85: ...son purposes and to spot if the compressor is needing more time to restore the desired pressure a possible indication of pump problem But the results can be affected if the CB is operated at the same time as the compressor is trying to restore pressure The cumulated pump run time is also displayed so that maintenance of the pump s can be performed when the prescribed number of run time hours has b...

Страница 86: ...ire the pump to operate would be a leak in the system Therefore resetting every day at midnight we also report in the HMI The number of pump starts in the last 24 hours The number of CB operations in the last 24 hours The number of pump starts without CB operations in the last 24 hours the difference between the first two The total pump run time in the last 24 hours HMI Measurements Pump Figure 14...

Страница 87: ...ical per 24h graphs In addition the following graphs are shown to aid the comparison and graphically detect anomalies History of the number of pump starts per 24 hours History of the number of CB operations per 24 hours History of the total pump run time per 24 hours HMI Measurements Pump Figure 149 Pump historical data per 24h ...

Страница 88: ...sh current An alarm can be set on the maximum inrush current value of the pump motor by setting the Max threshold value HMI Settings Analog channels Figure 151 Pump motor inrush current maximum threshold setting The alarm is displayed when the threshold has been reached HMI Measurement Alarms Figure 152 Pump motor inrush current alarm A graph of the first 12 seconds of the pump motor current vs ti...

Страница 89: ...re 154 Drop down list of previous archives Historical graphs In addition the following graphs are available to aid the comparison and graphically detect any change in value over time for Maximum inrush pump compressor motor current Pump run time to bring pressure back to level HMI Measurement Operations charts Pump Figure 155 Historical pump data graphs ...

Страница 90: ...is is done by selecting which of the generic channels 1 to 4 are relevant to display in the pump page HMI Measurement Settings Pump Figure 156 Display of generic channels As an example if we connect the sensors that give us the above mentioned information to generic channels 2 and 3 and we select these 2 channels to be displayed as part of the pump data then we would see the following information ...

Страница 91: ...uple of days so this should be considered Depending on how often the breaker is supposed to operate more than 2 or 3 pump starts per day should be flagged Pump run time 24h Depending on how long the pump cycle takes typically 15 20minutes the pump run time should not exceed 60 minutes per day Cumulative pump motor run time Data is usually available from the motor s maintenance manual A possible va...

Страница 92: ... 92 of 118 CB OPERATION GRAPHS HMI Graphs Operation Graphs We have already seen that you can view various operation graphs in the web HMI 10 1 1 1 Opening Operation Graphs HMI Measurements Operations charts Opening Figure 159 Operation graphs for opening ...

Страница 93: ...g Manual v7 0 May 2020 Page 93 of 118 10 1 1 2 Closing Operation Graphs HMI Measurements Operations charts Closing Figure 160 Operation charts for closing Note that the content will depend on the presence of the related sensors ...

Страница 94: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 94 of 118 10 1 1 3 Spring Rewind Graphs HMI Measurements Operations charts Spring Figure 161 Operation charts for spring rewind ...

Страница 95: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 95 of 118 10 1 1 4 Pump Motor Graphs HMI Measurements Operations charts Pump Figure 162 Operation charts for pump motor ...

Страница 96: ...list of previous archives Graphs is stored in memory and the oldest is replaced by the most recent when the buffer memory is full Graph scaling The scale on the graphs can be changed by selecting an area on the graph with the mouse as shown below The scaling will automatically expand Figure 164 Scaling graphs To return to the original scaling position the cursor on one of the points on the graph r...

Страница 97: ...sing operation data _sprg for spring rewind data _pump for pump operation data Each COMTRADE file is in fact made up of two files one with extension cfg and one with extension dat The file name shows the date at which the operation occurred and the data was recorded These files can be downloaded by going to the System Downloads area of the HMI HMI System Downloads Figure 165 COMTRADE files Because...

Страница 98: ...cfg and dat into the same location Use a COMTRADE file reader software for example WaveWind Point the reader to the location where the 2 files have been stored You will then be able to see the data and the graphs The example below shows the content of an opening operation file where all 6 coils open 1 and open 2 have fired to open the CB Figure 166 Visualising a COMTRADE file ...

Страница 99: ...e ambient 3x Drive cabinets 1x control cabinet and 3x tank heaters could be a possible use of the 8 sensors By default the temperatures are displayed in degrees centigrade but degrees Fahrenheit can be selected to display in instead HMI Settings Aux temperatures Figure 167 Number of PT100 sensors Each temperature sensor can be given a name to make it easier to identify what temperature is being me...

Страница 100: ... usually mounted away from direct sunlight an underneath the breaker the temperature sensor built into the gas sensor is used as the ambient temperature reference If there are 3x gas sensors then the average of the 3 measurements is used Provided there is a source the information is continuously displayed in the HMI HMI Measurements Sensors Figure 170 Ambient temperature The outside ambient temper...

Страница 101: ...e CBW3 prefers to monitor the end result of keeping the correct cabinet temperature We are therefore interested in setting a minimum and maximum threshold for the temperature in the cabinet An alarm will be raised if Measured value Maximum threshold Measured value Minimum threshold HMI Settings Aux temperatures Figure 172 Thresholds for measured temperatures The other temperature sensor inputs can...

Страница 102: ...and to decide what thresholds to set alarms at as this will depend on the customer s operational priorities and risk philosophy However here are some guidelines that may prove helpful in deciding what threshold values to use Alarm summary This table summarises all the alarms that can be set for monitoring the hydraulic pneumatic energy storage mechanism Figure 175 Spring energy storage mechanism a...

Страница 103: ...maximum temperature threshold could be set at 70oC to warn of any serious overheating issue within the cabinet If no alarm is required a very low minimum threshold 100oC and a very high maximum threshold 100oC should be set to ensure that no alarm is ever triggered Relative cabinet temperature To avoid condensation it is usually accepted that the inside of a cabinet should not be much colder than ...

Страница 104: ...ured by each channel can be configured by the user to reflect the value monitored The units of the value being measured can also be configured by the user This is done through the HMI The user can also specify in which COMTRADE file the data recorded will be added to O Open C Close Rewind Spring Pump HMI Settings Analog channels Figure 176 Spare analogue channels configuration Both the name and th...

Страница 105: ... analogue channels alarm thresholds Any alarm triggered can be seen in the HMI HMI Measurements Alarms Figure 179 Spare analogue channels alarms Alarm summary Data obtained from CBW3 Min Alarm Max Alarm Any analogue sensor voltage or current output 1 Yes Yes Any analogue sensor voltage or current output 2 Yes Yes Any analogue sensor voltage or current output 3 Yes Yes Any analogue sensor voltage o...

Страница 106: ...otocols are most often used it is available for connection to older SCADA systems Available Alarm Relays Two dry contact alarm relays K1 and K2 are provided as standard on the base ProWatch module The K2 output is used to provide the state of the CBW3 It is the result of the system s own self checking function It can inform the maintenance service and or supervision system of an internal malfuncti...

Страница 107: ...ix pages The alarms available have already been defined in each of the relevant previous sections Each monitored function has its own alarms that can be assigned in a similar manner to one of the 16 relays or K1 by selecting them in the appropriate table in the alarm setup section This example shows the matrix for the gas alarms shown in the example in Figure 180 above HMI Settings Relays Gas Figu...

Страница 108: ...igital protocols nowadays Clearing Alarms Some alarms depend on the status of a continuous measurement and auto clear themselves when the status changes Other alarms are based on an operation and will stay active based on the value recorded during the last operation They can however be cleared manually by Selecting the Clear alarms note that it does not affect the relay assignment Pressing the Set...

Страница 109: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 109 of 118 One for all the Operations related alarms HMI Settings Relays Operations Figure 184 Clearing operations related alarms ...

Страница 110: ...lable from Modbus DNP3 IEC 61850 Ed2 The protocols enabled in the configuration are displayed with a tick in HMI System Network Figure 185 Protocols available Please refer to the specific documentation of each protocol for further information Note that each protocol uses memory and processing power and that no more than two protocols should be enabled at any one time and preferably not DNP3 and IE...

Страница 111: ...sly open the individual CBWatch3 web HMI Figure 186 Screenshot from Perception Fleet software For more information about Perception please consult the perception User Manual In order to be able to do that you will need CBWatch3 firmware v4 1 or greater Perception Fleet software v2 0 or greater Furthermore Perception relies on a Modbus connection to retrieve its data so you will need to enable the ...

Страница 112: ...e asked to generate download and send data about the configuration of your system so that GE can help you understand and remotely fix any issue encountered The Assistance file can be accesses as follows Login as Specialist and go to the bottom of the following page HMI System Downloads Figure 188 Generating the remote assistance file ...

Страница 113: ... file Product System Files We may also ask you to download and send us product ini and or system ini files These files contain the system setup and settings This can be done again using the Specialist login by double clicking on either of these two files HMI System Downloads Figure 183 Generating the remote assistance file If we have to make some changes to your configuration we will then send you...

Страница 114: ... 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 114 of 118 Choose the file by browsing to the location on your laptop Upload the file by pressing the Send button Repeat for the other file if required ...

Страница 115: ...ccuracy 0 1 of measuring range A D conversion 16 bit Temperature Accuracy 0 1oC PT100 3 wire Time Accuracy 1 second Data storage Short Term gas data last 3 000 values 1 per minute Long Term gas data last 500 values 1 per day Operations measurement Feature Value Time horizon Operation 0 3 seconds Motor current 12 seconds Refresh frequency every 400 micro seconds 0 4ms Analogue measurements Accuracy...

Страница 116: ...CB Watch 3 Operating Manual v7 0 May 2020 Page 116 of 118 Processor Feature Value CPU frequency 100 MHz Memory 512Mbit SDRAM 256Mbit Flash Battery No battery used Date time Saved by super capacitor for 15days ...

Страница 117: ...MA 037 CB Watch 3 Operating Manual v7 0 May 2020 Page 117 of 118 Page left blank ...

Страница 118: ...tions com MD htm Customer Service Centre 24 hours a day 365 days a year T 1 800 361 3652 United States and Canada T 1 514 420 7460 worldwide ge4service ge com GE the GE monogram CBWatch are trademarks of the General Electric Company GE reserves the right to make changes to specifications of products described at any time without notice and without obligation to notify any person of such changes Co...

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