Rick Kernan richard.s.kernan@xcelenergy.com Presentation Overview - - PowerPoint PPT Presentation
Eaton Vaultgard Uses For Field Personnel Presented by Rick Kernan richard.s.kernan@xcelenergy.com Presentation Overview Denver Network Stats Legacy Construction Issues Identified Real time Vaultgard Uses Protector and other
Presented by
richard.s.kernan@xcelenergy.com
Presentation Overview
Denver Network Stats
➢ 126
➢ 805
➢ 12 – 3 Feeder
➢ 5
➢ 182,000 Ft.
➢ $8,000,000 in 2012
Legacy Construction Problems Identified with Vaultgard
Miss-Matched Impedance
940 978 958 640 678 679 693 708 708
These 3 transformers were changed out in
with miss-matched impendences. As you can see, the transformer with the least resistance 929P is “hogging the load”. This problem was identified with the Vaultgard monitoring system in 2012 after 26 years. Protector 927P – Impedance 7.08 Protector 928P – Impedance 7.06 Protector 929P – Impedance 5.13
929P - EATI1098 - Adams Mark Hotel– South Bank
Incorrect Tap Changer
1046P - CALI1836 – On Lincoln Park–2001614 637 658
The manufacturer installed the tap changer for transformer 1046P in the wrong position. The transformer appeared to be on tap 4. The tap was actually on tap 5. Protectors 1044P and 1045P would not close once
carrying 3 times the amperage.
Incorrect Tap Changer
1044P - CALI1836 – On Lincoln Park–2001
Protector 1044P is opened. The network buss voltage is 4+ volts higher than the transformer voltage. The relay will not close in the automatic position.
4.0 4.4 4.9
1045P - CALI1836 – On Lincoln Park–2001
Protector 1044P and protector 1045P are now opened. The newtork buss voltage is 7+ volts higher than the transformer voltage. Neither protector will close in the automatic position.
1044P - CALI1836 – On Lincoln Park–2001
8.0 9.0 9.7 7.7 8.7 8.8
Network buss voltage is 8+ volts higher than the transformer
Incorrect Tap Changer
1046P - CALI1836 – One Lincoln Park–2001
Protector 1044P and 1045p are now closed and sharing the load. Protector 1046P is open. This transformer voltage is now 9+ volts higher than the network buss.
9.8 10.2 10.9
Incorrect Tap Changer
9.7 10.1 10.9The transformer voltage is now 9+ volts higher than the
close in the automatic position.
Incorrect Tap Changer
At this point, the tap changer has been repositioned. The voltage issue has been corrected and the load on this spot network is now balanced. The protectors will close as needed in the automatic position. This spot network was built and put on line in 2007. This problem went unidentified for 5 years. The problem was identified and corrected 1 week after installing Vaultgard in 2012.
Bad Transformer
121 143 23 1043P - DTER1304 – Paramount Theater
This network grid location was rebuilt and upgraded in 2005. At the time of construction, voltages on protectors 975P and 1043P were checked and phased. In 2012, Vaultgard was installed and the amperage disparity on “C” phase was identified.
Bad Transformer
1043P - DTER1304 – Paramount Theater
123 124 124
Protectors 975P and protector 1043P are isolated from the secondary grid. Protector 1043P is opened. Voltage on 1043P checks good. Amperage transfers to protector
Bad Transformer
1043P - DTER1304 – Paramount Theater
123 124 108
Now protector 975 is now open and protector 1043P is
phase is now down to 108 volts. The transformer is identified as bad.
Bad Transformer
At this point, transformer has been changed out. The voltages are good and the load is being shared equally. . This problem went unidentified for 7+ years until Vaultgard was installed.
Catastrophic Breaker Failure
885P-LACO1788- AT&T Bank 2
This problem was identified on a routine weekly check using
missing amperage from “C” phase has been transferred to “C” phase on protectors 882P and 883P. Crew responded to find a catastrophic protector failure.
1365 1354 942 919 1 959 1019 950 1003
882P-LACO1787- AT&T Bank 2 883P-LACO1789- AT&T Bank 2
Real Time Vaultgard Uses
Real Time Amp & Volt Readings
This slide is an actual amp & volt reading on our system. We field checked approximately 50 locations to verify the Vaultgard readings. Vaultgard was within 1 to 3 amps of the field readings consistently. The volt readings are also extremely accurate.
System Performance Reports
This is an actual “A” phase voltage reading in graph from of an “in service”
information can also be down loaded into a spreadsheet format.
System Performance Reports
This is an actual “A” and “B” phase voltage reading in graph from of an “in service”
information can also be down loaded into a spreadsheet format.
System Performance Reports
This is an actual “A”, “B” and “C” phase voltage reading in graph from of an “in service” protector. This information can also be down loaded into a spreadsheet
was completed in less than 5
allows field personnel to communicate with the customer in real time.
Protector and Trouble Shooting
Protector Trouble Shooting
This screen shot shows a protector that is missing the “B” phase network voltage. This protector had a loose connection. Problem was identified with Vaultgard on a routine check.
Courthouse – CAPI 1481 - 1057 304 2 306
High Temperature Warning
This email was sent by Vaultgard. The high temperature alarm is set at 60 degrees Celsius. This protector is in an alley and had filled up with water due to a heavy rain storm. The resistors started to boil the water inside the protector. After receiving the alarm, the breaker was remote opened. The crew was able to dry out the protector and save a catastrophic failure.
61
High Temperature Warning
61.0 353P -ELTI1103 – MH 15-7-2
This is the screen shot showing the protector that was
Potential Return - Protector
470P - CALI 2022 - Fed Bldg - 1961 Stout
Protector 470P is “hung up” and will not open. With 22 protectors on this feeder, it could take up to 4 hours to physically run each location. With Vaultgard, it takes less than 5 minutes to identify the problem.
Protector 470P is “hung up” and will not open. Current flow is reversed and crossing the trip line. The protector wants to trip but can not due to mechanical failure.
49 69 52 284 284 283 284 284 283 0.0 0.0 0.0 22 508P - CALI 2022 – Total Tower – 929 18Th St – N Terrace – 7Th Fl
Protector 508P is a sympathy “hang up”. Protectors 511P & 516P on the same feeder opened up. Identified by Vaultgard.
Return Voltage GE Protector
72 68 69
007P – CAPI2759 – Blue Cross West Bank
This is al screenshot of a GE protector on an open substation
Return Voltage CM52 Protector
This is a screenshot of a CM52 protector on an open substation breaker. The secondary voltage returned thru the transformer is 7 volts. The return voltage form a CM52 is not an issue.
804P – CAPI2760- Blue Cross East Bank
7 5 5 7 5 5
➢ Dead front protector. ➢ Higher interrupting and fault close ratings. ➢ Standardized modular components. ➢ No adjustments required and fewer replacement parts. ➢ Built-in wear gauge. ➢ Remote racking ability. The CM-52 remote racking device provides a means of remotely connecting and disconnecting a network protector from the energized bus-work. ➢ CM52 is set up for NPARMS. Network Protector Arc Reduction Maintenance System (NPARMS) senses fault current in either forward or reverse direction in addition to providing the utmost in arc flash protection. When enabled, the innovative Arc Reduction Maintenance System establishes a preset instantaneous trip level that overrides the time delay function of traditional over current relays and schemes of the associated breaker.
Fault Locating Using Vaultgard
Xcel Energy has developed a procedure to use Vaultgard when a circuit lockout occurs.
Vaultgards associated with the locked out circuit.
projected area & start fault finding.
Step #1 – Check Emails
Mon 7/9/2018 18:34
Event=Alarm Active Device=RTD Bank 1 – CAPI 2756 – 824P Time=11/29/2018 11:36:08 /INCOM/Network/824/aBreakerPosition/Value=true
These are emails from a circuit lockout. The order in which they come in is the key to finding the area where the fault is located.
Step #2 – Plot Emails on Map
Plot the Vaultgard emails
the order they
emails will determine where the employees will start the fault finding process.
1St 3Rd 2Nd 5Th 6 T h 7Th 8Th 4Th
Step #3 – Establish Search Area
1St 3Rd 2Nd 4Th
After the first 4 emails are plotted on the map, a perimeter is drawn on the map around the
will the first area to be inspected by the field crews.
Step #4 – Open Event Log
Click on the Vaultgard Event Log button.
LOG
Step #4 – Download Event Log
Click on the Vaultgard “View the log” button. Download the event log
associated with the locked out circuit into an Excel spread sheet.
LOG
Step #5 – Evaluate Event Log
This spread sheet is the event logs of all Vaultgards associated with the faulted circuit. It has been sorted by time. It is very important to read the comments in the “Parameter Display Name” column. There is only “Trip Event” in this column. This indicates a cable fault is the likely cause of the lockout.
1St 3Rd 2Nd 4Th
FINAL ASSESSMENT. This fault occurred in July of 2018. The first 4 emails are going to determine the search area. The crew was dispatched to the area and searched each manhole and vault in the designated area. The crew found a pinhole in a transformer pothead located in a manhole (See picture on the next page). The process to find this fault took less than 2 hours. The old fault finding process could take up to 24 hours to identify the fault. This method has been proven to be accurate 14 of the last 15 circuit lockouts.
FAULT
FINAL ASSESMENT – FAULT #1
FAULTED POTHEAD
Step #1 – Check Emails
These are emails from a circuit
in which they come in is the key to finding the area where the fault is located.
Step #2 – Plot Emails
Plot the Vaultgard emails on feeder map in the order they report. The first 4 emails will determine where the employees will start the fault finding process.
1St 3Rd 2Nd 4Th 5 t h 7 t h 6 t h 8 t h
Step #3 – Establish Search Area
After the first 4 emails are plotted on the map, a perimeter is drawn on the map around the
will the first area to be inspected by the field crews.
1St 3Rd 2Nd 4Th
Step #4 – Open Event Log
Click on the Vaultgard Event Log button.
LOG
Step #4 – Download Event Log
Click on the Vaultgard “View the log” button. Download the event log
associated with the locked out circuit into an Excel spread sheet.
LOG
Step #5 – Evaluate Event Log
This spread sheet is the event logs of all Vaultgards associated with faulted circuit. It has been sorted by time. It is very important to read the comments in the “Parameter Display Name” column. Notice “Trip Event” in this column as well as “Over Current”. This could indicate a cable fault
FINAL ASSESMENT – FAULT #2
1St 2Nd 4Th 3Rd F A U L T FINAL ASSESSMENT. This fault occurred in May of
going to determine the search area. The crew was dispatched to the designated area and searched each manhole and vault. The crew found a bad transformer located in a manhole. The process to find this fault took less than 3 hours. The old fault finding process could take up to 24 hours to identify the fault. This method has been proven to be accurate 14 of the last 15 circuit lockouts.
Step #1 – Check Emails
These are emails are from a circuit
which they come in is the key to finding the area where the fault is located.
Plot the Vaultgard emails on feeder map in the order they
4 emails will determine where the employees will start the fault finding process.
3Rd 1St 4Th 2Nd 7Th 6Th 5Th 8Th
Step #3 – Etablish Search Area
After the first 4 emails are plotted on the map, a perimeter is drawn on the map around the
area will the first area to be inspected by the field crews.
3Rd 1St 4Th 2Nd
Step #4 – Open Event Log
Click on the Vaultgard Event Log button.
LOG
Step #4 – Download Event Log
Click on the Vaultgard “View the log” button. Download the event log
associated with the locked out circuit into an Excel spread sheet.
LOG
This spread sheet is the event logs of all Vaultgards associated with the faulted circuit. It has been sorted by time. It is very important to read the comments in the “Parameter Display Name” column. There is only “Trip Event” in this column and indicates a cable fault is the likely cause of the lockout.
FINAL ASSESMENT – FAULT #3
3Rd 1St 4Th 2Nd
FINAL ASSESSMENT.
This fault occurred in July
are going to determine the search area. The crew was dispatched to the area and searched each manhole and vault in the designated area. The crew found faulted cable located in a
find this fault took less than 3 hours. The old fault finding process could take up to 24 hours to identify the fault. This method has been proven to be accurate 14 of the last 15 circuit lockouts. FAULT
Step #1 Fault 4 - Check Emails
These are emails from a circuit
in which they come in is the key to finding the area where the fault is located.
Step #2 – Plot Emails on Map
Plot the Vaultgard emails
the order they
emails will determine where the employees will start the fault finding process.
2Nd 4Th 3Rd 1St 5th 8Th 7Th 6Th
Step #3 – Establish Search Area
After the first 4 emails are plotted on the map, a perimeter is drawn on the map around the
will the first area to be inspected by the field crews.
2Nd 4Th 3Rd 1St
Step #4 – Open Event Log
Click on the Vaultgard Event Log button.
LOG
Step #4 – Download Event Log
Click on the Vaultgard “View the log” button. Download the event log
associated with the locked out circuit into an Excel spread sheet.
LOG
This spread sheet is the combined event logs of all the Vaultgards associated with the faulted circuit. If we look at the highlighted data, we can see that Vaultgard was able to capture the exact time of damage of the fault and the associated fault current. The “Parameter Display Name” and “Value” column indicates the cable was physically damaged due to the recorded high fault current..
FINAL ASSESMENT This fault occurred in April
an underground boring
all 3 phases and was in the process of leaving the scene of the incident when the field personnel showed
considered a “miss” using the established trouble shooting procedure, it did, in fact, put the crew in the area to identify the fault cause within 30 minutes.
FINAL ASSESMENT FAULT #4
1St 3Rd 2Nd 4Th F a u l t
The Track-o
https://www.movexinnovation.com/en/material-handling/track-o-twin-track-66
https://www.youtube.com/watch?v=YztSJ83Q38A https://www.youtube.com/watch?v=g2NF3pvtwxA
Vaultgard Benefits & Cost Savings
Fault Locating Abilities Distressed Equipment Identification Identification of System Deficiencies Real Time Instantaneous Email Notifications Real Time Secondary Phasing Real Time System Recording Daily System Monitoring Documentation of System Performance Customized Breaker Parameters Potential Return Identifier