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 Troubleshooting • Fault Locating Using Vaultgard • The Tracko

Denver Network Stats • Vaultgards ➢ 126 • Protectors ➢ 805 • Networks ➢ 12 – 3 Feeder • Substations ➢ 5 • Fiber Optics ➢ 182,000 Ft. • Cost ➢ $8,000,000 in 2012

Legacy Construction Problems Identified with Vaultgard • Miss-Matched Impedance • Transformer With Incorrect Tap Changer • Bad Transformer • Catastrophic Breaker Failure

Miss-Matched Impedance 693 708 708 640 678 679 929P - EATI1098 - 940 978 958 Adams Mark Hotel – South Bank Protector 927P – Impedance 7.08 These 3 transformers were changed out in Protector 928P – Impedance 7.06 1986. These transformers were installed Protector 929P – Impedance 5.13 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.

Incorrect Tap Changer 1046P - CALI1836 – On Lincoln Park – 2001 614 637 658 Linc. Sidewlk Bsmnt 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 opened due to the voltage differential. Protector 1046P appears to be carrying 3 times the amperage.

Incorrect Tap Changer 1044P - CALI1836 – On Lincoln Park – 2001 4.0 4.4 4.9 Linc. Sidewlk Bsmnt 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.

Incorrect Tap Changer 1044P - CALI1836 – On Lincoln Park – 2001 8.0 9.0 9.7 Linc. Sidewlk Bsmnt 1045P - CALI1836 – On Lincoln Park – 2001 7.7 8.7 8.8 Linc. Sidewlk Bsmnt 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.

Incorrect Tap Changer 8.1 9.0 9.1 Network buss voltage is 8+ volts higher than the transformer voltage. Phasing voltage is negative. The protector will not close.

Incorrect Tap Changer 1046P - CALI1836 – One Lincoln Park – 2001 9.8 10.2 10.9 Linc. Sidewlk Bsmnt 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.

Incorrect Tap Changer 9.7 10.1 10.9 The transformer voltage is now 9+ volts higher than the network. Phasing voltage is now positive. The protector will 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 1043P - DTER1304 – 121 143 23 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 – 123 124 124 Paramount Theater Protectors 975P and protector 1043P are isolated from the secondary grid. Protector 1043P is opened. Voltage on 1043P checks good. Amperage transfers to protector 975P. Everything appears to be normal.

Bad Transformer 1043P - DTER1304 – 123 124 108 Paramount Theater Now protector 975 is now open and protector 1043P is closed. Amperage transfers to 1043P. Voltage on “C” 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 882P-LACO1787- 959 1019 1365 AT&T Bank 2 883P-LACO1789- 950 1003 1354 AT&T Bank 2 885P-LACO1788- 942 919 1 AT&T Bank 2 This problem was identified on a routine weekly check using Vaultgard. Protector 885P has no amperage on “C” phase. The missing amperage from “C” phase has been transferred to “C” phase on protectors 882P and 883P. Crew responded to find a catastrophic protector failure.

Real Time Vaultgard Uses • Accurate Amp and Voltage Readings • Real Time System Performance Reports

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” protector. This 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” protector. This 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 format. This report was completed in less than 5 minutes. This allows field personnel to communicate with the customer in real time.

Protector and Trouble Shooting • Protector Trouble Shooting • Instantaneous Alarm Alerts • Potential Return • Return Voltage GE vs CM52

Protector Trouble Shooting Courthouse – CAPI 304 2 306 1481 - 1057 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.

High Temperature Warning 61 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.

High Temperature Warning 353P -ELTI1103 – MH 61.0 15-7-2 This is the screen shot showing the protector that was overheating.

Potential Return - Protector 470P - CALI 2022 - Fed Bldg - 1961 Stout - W Bank 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.

Potential Return - Protector 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.

Potential Return - Sympathy 508P - CALI 2022 – Total Tower – 929 18 Th 49 69 52 284 284 283 284 284 283 0.0 0.0 0.0 22 St – N Terrace – 7 Th Fl Protector 508P is a sympathy “hang up”. Protectors 511P & 516P on the same feeder opened up. Identified by Vaultgard.

Return Voltage GE Protector 007P – CAPI2759 – 72 68 69 Blue Cross West Bank This is al screenshot of a GE protector on an open substation breaker. The secondary voltage returned thru the transformer is 68+ volts. This is equivalent to 1800+ volts on a 13200 volt system.

Return Voltage CM52 Protector 804P – CAPI2760- 7 5 5 7 5 5 Blue Cross East Bank 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.

CM52 – The Future of Protectors ➢ 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.