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  MORE than a supplier     HV Power Customer Newsletter November 2012    
      In this issue:          
        Top 9 Questions about 11 & 22k V 630A Ring Main Units    
 

Photo - Warwick

 Commentary

Warwick Beech

Jingle Bells

I love Christmas and enjoy the traditions of cake, music and time with family etc. But there is a case of too much, too soon. My personal belief is that Christmas related items in shops should not be displayed till the first of December, and the count down on the number of days till Christmas should start with a number less than 10.

That said, as a supplier we would like to remind you to start considering:

A) Do you need to forward order items early, to account for the couple of weeks of manufacturing and delivery delay that will occur over the Christmas/New Year period?

B) Do you have your own “insurance spares” for critical items should equipment failure occur during this time when the supply chain cannot respond timely?

C) Have you managed your spares – are they actually where they should be (and have not been cannibalised for some other purpose), and has power been applied in the last 2 years to ensure the spares will actually work when required (Ideally electrolytic capacitors should be “conditioned” for 48 hours at least every 2 years).

We will hold off making our seasons greetings until the December issue of our newsletter!

Regards

Warwick

   
HV Power distributes Siemens 11kV and 22kV ring main units

Our road trip to introduce HV Power as Siemens NZ’s distributor for MV primary switchgear has now been completed. We travelled over 5600 kms from Auckland to Whangarei to Invercargill and back, seeing over 20 different distribution/lines companies. During these visits there were a number of common and interesting questions. We have put together our “Top 9”

1) What can be automated on the 8DJH Ring Main Unit?

  • The disconnect switches can be automated with 24, 48, 60, 100, 220 Vdc, 110 & 230 Vac motors
  • Spring recharge mechanism for vacuum circuit breaker and transformer fused feeder panels can be motorised (same voltages as above)
  • Transformer fused feeder can be fitted with shunt release for remote tripping
  • Circuit breaker open/close can be remotely operated
  • All visual status indicators can be provided with auxiliary contacts for remote indication
  • Earth switches cannot be automated

2) What is the wake-up time and minimum operating current of the self-powered protection relays?
The Kries self power relay for transformer monitoring features settings for three pick up currents, a short circuit current threshold, Overcurrent level (time delay, very inverse and extremely inverse settings) and earth fault over current time delay protection. Wake-up and minimum current to operate is not an issue as the unit has an internal battery that powers the device for up to 15 years, if current level is not sufficient for self-power operation!

3) What gas handling equipment do I need?
The units come filled with gas from the factory. Adding another panel on site requires no gas handling as the units simply bolt together to extend the busbar (extensible option).

4) What fuse ratings can the Fused Transformer Feeder unit use?
Standard DIN 43625 “medium” fuses with strikers are compatible with the Siemens RMU (fuse sizes approx 292 or 442 mm x 53/67/85 mm). You are not forced to use Siemens specific fuses. Fuse ratings of 16 to 125 A are supported and are suitable for (11 kV) transformers from 125 kVA to 1250 kVA. For larger ratings, the Circuit Breaker panels should be used.

5) What is the expected service life?
Under normal operating conditions the service life is expected to be at least 35 years. The service life is mainly limited by the electrical and mechanical endurance of the switching devices.

6) What VT options are there?
Circuit VT’s can be connected in the feeder panels, piggy backing onto cable T-plug connections. Busbar VT’s can also be mounted on the top of the RMU, connecting via bushings to the bus bar of Circuit Breaker, Bus Section or Metering Panels.

The “Billing Metering Panel” provides an air insulated panel for customer (or factory installation) of virtually any block type CT or VT. This is normally used for 11 kV metering applications where locally certified metering CT’s and VT’s are used.

7) What CT’s can be accommodated?
A low profile three phase current transformer (4MC63) can be mounted on the bushing of the cable connectors of the circuit breaker unit and the 500 mm wide Ring Main Unit (but not the 310 mm Ring Main Unit). Any CT can be installed onto the cables in the cable termination boxes of RMU, Circuit Breaker and Fused Transformer feeder – depending upon CT and cable sizes. With a bus sectionaliser panel, CT’s can be installed in the screened bus chamber. CT’s can also be installed in the Billing Metering Panel.

8) What indications are available to prove disconnection?
The front panel mechanical indicators are attached to the rotary arm of the breaker or switch actuator. Therefore these physically replicate the position of the Circuit breaker and Disconnector Switches.

9) Is the circuit breaker suitable for auto reclosing?
The circuit breaker can be supplied suitable for auto reclosing; in this case the closing spring can be recharged by hand, or automatically in the case of motor operated mechanisms. Thus, the closing option is available immediately on tripping.

 

   
      Top 9 Questions about 11-33 kV Reclosers from our Road Trip    
     
Siemens 3AD pole top recloser

1) Can the colours on the position indicator be changed?
Yes, the ordering codes include an option to allow the position indicator to show “Green” when the Recloser is closed and “Red” when the Recloser is open (or the other way around). The local pushbuttons in the control cubicle can also be changed to meet customer convention.

2) Are the Reclosers supplied with mounting frames?
Yes both standard design pole mounting and substation mounting frames are available to order. However, if the standard mounting frames don’t suit your local requirements, HV Power will customise a design to your needs.

3) Are there electronic modules located in the unit at the top of the pole?
There are no electronics installed in the pole top unit, all electronics are located in the control cubicle and readily accessible if service is ever required. The controller itself is also withdrawable and can be changed even with the Recloser in service – this provides a simple method to change settings without needing a technician at site.

4) What VT options are there, and where do a second set of VT’s mount for Sync Check and Loop Automation applications?
The Recloser can be supplied with a high accuracy integral resistive voltage divider on one side. For applications where voltage needs to be measured on both sides of the Recloser, a separate VT for the second side can be mounted on the pole mounting frame.

5) Is DNP-iP supported?
DNP serial protocol is standard, but the controller can be ordered with an Ethernet adapter for DNP-iP communications.

6) For switchyard use, can I locate the controller inside and how far away?
Yes, the controller can be mounted remotely from switch unit, the distance depends whether the voltage sensor is required or not.

7) After the number of designated recloses, does the Recloser just become disposable?
Yes, the unit is SF6 free, so no special disposal methods are required. The controller records the number of operations and I2t information, so any need for replacement can be predicted.

8) What is the fault current capability of the Recloser?
Two ordering options are available, either 12.5 kA or 16 kA.

9) Is the 10,000 load break operation rating associated with the fault current rating?
No, the 10,000 operations is at normal rated current (400 A, 630 A or 800 A). The Reclosers are type tested and certified for 116 operations at full short circuit current to meet the Standards requirements. However, testing has actually been extended to over 300 operations to ensure robust and reliable design.

 

   
      Upcoming Training    
     
HV Power Training

Don’t forget about the following upcoming HV Power training courses:

  • REG-D/DA Voltage Regulator Design Workshop                    30th Nov 2012
  • REG-D/DA Voltage Regulator Testing & Commissioning     22nd Feb 2013

See our website training page, or contact Vladimir Brijacek directly for further details and course costs.

Phone 09 304 1685 or Email vladimirb@hvpowerautomation.com

 

   
      HV Power’s new staff    
     
New staff

We welcome Shankaran Pillay Paramanathan (Shank) to the role of Auckland based sales engineer. Shank has attained a BCom and a BE degree. The bulk of this, his first year as a graduate engineer, was spent at Ergo Consulting cutting his teeth doing detailed design work for upgrades of local substations involving the installation of a range of technologies. We wish him every success as he gets to grip with our extensive product portfolio. After-hours we’ve heard he plays a mean game of chess and enjoys rugby and tennis. We expect that many of our customers will get to personally meet Shank in his new front line role.
shankp@hvpowerautomation.com, DDI Phone 09 304 1686

 

Meanwhile, supporting HV Power with our Technical Support and inwards goods processing, we also have the following staff members who, having completed graduate studies, are now getting to grips with their futures.

Purathany Palany (Pura) completed her studies in Electrical and Electronics Engineering at UoA and is racking up the work hours to graduate in September next year. Receiving grounding in DIGSI software and learning to provide technical support for our Recloser and Differential Protection Relays is a good foundation on which to realise her ambition of becoming a Protection Engineer. Pura enjoys a game of badminton in her spare time, an interest she shares with her boyfriend whom she will marry on 5th December. We wish her every happiness in these ventures.
purap@hvpowerautomation.com, Phone 09 377 2001


Mohit Phadnis completed the same studies as Pura at UoA, but is set to graduate in April next year. Another Protection Engineer in the making, Mohit will provide technical support on our Distance and Overcurrent Protection Relays, while honing his skills and understanding of DIGSI software. Continuing his education with a further course in Advanced Power Studies, this ‘eligible bachelor’ plays tennis in the little remaining spare time he has.
mohitp@hvpowerautomation.com Phone 09 377 2001


Brine Liu completed his studies in Network Engineering at AUT and joined HV Power as the lead for Goods Processing with the additional technical support role for SICAM PAS (IEC 61850 & DNP) Substation Automation and REG-D/DA’s. His employment was earmarked by an early, but short, ‘career break’ as he and his girlfriend returned home to China to get married. The happy couple’s peace and tranquillity is due to be disrupted in February when they will be blessed by the arrival of their firstborn. Parenthood is another skill we wish Brine and Yuki every success in.
brinel@hvpowerautomation.com Phone 09 377 2001

 

   
      National Maintenance Engineering Conference and Exhibition    
     
Bender Insulation Monitoring

HV Power featured a display stand at the 2012 National Maintenance Engineering Conference Exhibition in Rotorua this month. Rob Knight and Warwick Beech were in attendance, giving focus to the benefits that Bender Insulation Monitoring equipment can bring to electrical installations.

For a brief introduction to the BENDER range of devices, see our website.

 

   
      REG-D/DA Remote I/O Box via Fibre & other installation options    
     
VRR technical note

We have taken the information from our August newsletter about the new fibre connected I/O boxes and goose messaging options to create a new technical note “REG-D/DA Remote I/O Boxes & other Voltage Regulator Relay installation options”. A copy of this document can be downloaded from our website Technical Library.

If you are interested in finding out about some of the installation options available with REG-D/DA voltage regulators, then signup for our REG-D/DA Design Workshop
(23rd Nov 2012).

 

   
      SNMP & SYSLOG features in Tekron Clocks    
     
Tekron SysLog features

Tekron’s latest generation of “E” series GPS clocks such as TCG 01-E and TTM 01-E feature Ethernet interfaces for local and Remote Engineering Access.

This same Ethernet port can also be activated at time of ordering, or later via licence code update, to function as a NTP (Network Time Protocol) Server.

However, even without the NTP option, the GPS Clocks will provide SNMP and SYS LOG features.

Here is a quick overview of what this means to those getting to grips with computer networks and its many acronyms.

SNMP is the acronym for Simple Network Management Protocol. It’s intended to provide a standardised mechanism to monitor/manage equipment over a network. Typically a Network Management System uses SNMP to monitor network attached devices to alert administrators to conditions that warrant attention.

The SNMP model includes:

  • Managed devices (e.g. Tekron TCG 01-E)
  • The Agent – code that runs within the managed device to deliver SNMP information
  • Network Management System – software that runs on a “Manager” to gather data from managed devices and report to Network Administrators

SNMP itself does not define what data should be reported, but rather the manufacturer of each managed device provides a MIB (Managed Information Base) file that defines the structure of the information handled by that device’s agent.

A Network Management System can request specific information from a managed device (using its knowledge of the MIB and a SNMP GET command), and where permitted it can also request a change to a setting via the SET command.

SNMP is called “Simple” as only five basic message types are used (GET, GET-NEXT, GET-RESPONSE, SET & TRAP).

The SNMP TRAP message is the only message that is initiated by the agent. This allows the “device” to notify the manager of an alarm condition, instead of needing to wait for the SNMP manager to poll the device status.

Note that the MIB information is resident within the agent, and a SNMP “WALK” command can be used by the likes of a Network Management Systems to retrieve from a managed device the full “subtree” of variables accessible within the device. The MIB information is also normally available as a standalone .mib file, to allow network managers to manually import and set the parameters of interest within their Network Management System.

To gain an experience of SNMP activity first hand, use the third party program SNMP Trap Watcher which is provided on the CD-ROM delivered with your GPS Ethernet clock. Running this program on a PC connected to the clock will capture and display the different SNMP TRAP messages issued by the clock. (Refer to the SNMP section of the Tekron user manuals for required clock settings). Messages include information on the status of the antenna connection, power supply and number of satellites visible.

The SYSLOG features in Tekron GPS Ethernet clocks allows the IP addresses of up to two computers running sys-logging software to be identified. The clock will send to these IP addresses messages that can be logged and time stamped. Syslog’s can provide network administrators important forensic information for resolving network issues. An example of the type of information that is reported by Tekron clocks is shown by the following log:
• <133>Jan 1 12:00:08 Tekron.SN=1898 RCM: Cold start.
• <134>Oct 25 15:54:53 Tekron.SN=40 RCM: Antenna OK.
• <134>Oct 25 15:55:03 Tekron.SN=40 RCM: Power A OK.
• <134>Oct 25 15:54:58 Tekron.SN=40 RCM: Satellites OK.
• <132>Oct 25 15:56:56 Tekron.SN=40 RCM: Antenna fail.

 

   
      PQ-Box 100 & WinPQ mobil update (V1.7.08)    
     
WinPQ Mobile software for PQ-Box 100

In September a major update of WinPQ Mobil for the popular PQ-Box 100 Power Quality Analyser was released (V1.7.01), with new features including:

  • Programmed start/stop time – preset the PQ-Box 100 to automatically start/stop recording at user defined date/time
  • Details Tab reports max/min/mean values of the currently displayed graph – allows you to quickly gather the information commonly required
  • COMTRADE & XML file output option

A maintenance release is now available from the A.Eberle website (Version 1.7.08), which includes a correction enabling the saving of the “.sel” ASCII export template/filter selection. Updated firmware is also available.

A.Eberle WinPQ software download page (WinPQ Mobil)
A.Eberle PQ-Box 100 firmware download page

As part of our ongoing commitment to the range of A.Eberle Power Quality devices, Edition 10 of our Hints and Tips document has been published to our Technical Library Website.

Also, by clicking on the subscription link at the bottom of this email, you can join our PQ-Box 100 newsletter list to receive future PQ-Box 100 information directly as it is published.

 

   
      Tekron website    
     
New Tekron website

Tekron International have a new look website, which now includes pictures of common accessories.

www.tekroninternational.com

If you have been puzzled about the Tekron order codes, a guide to these now features on the Resources Tab for most products. We may be slightly biased, but for the MOFR, we recommend our own guide, which can be found in our website Technical Library.

 

   
Copyright 2012 HV Power Measurements & Protection Ltd