HV Power
Customer Newsletter

New SIPROTEC Compact 7SJ80 relay

Siemens have just announced a new generation multifunction protection relay, targeted for feeder protection. The SIPROTEC Compact 7SJ80 incorporates a variety of innovations including pluggable CT & VT connections, a USB front port and Ethernet communications. In addition the relay comes standard with an impressive array of protection elements which include directional over- current , synch-check , high-impedance restricted earth-fault, breaker fail, auto-reclose to list just a few.

Local breaker controls are provided on the relay together with programmable function keys and a 6-line LCD display. Flexible control functions allow the control and interlocking of isolators etc. Monitoring functions include primary measurements, circuit breaker wear monitoring, trip circuit and fuse failure detection together with fault recording.

As part of the SIPROTEC family, the new 7SJ80 relay boasts multiple communication options, including DNP 3.00 serial and IEC 61850 over fibre or copper. The relay is available in a number of hardware configurations ranging from 3 to 7 binary inputs and 5 to 8 binary outputs (2 change over contacts).

Click here for introductory details on the 7SJ80

Regulator++

Significant cost savings are realised in the design and implementation of transformer control systems when a one-box approach is employed. Eberle’s multifunctional REG-D and REG-DA Regulators equipped with TMM option provide temperature control of cooling fans and pumps – in addition to their primary role of controlling the tap changer for voltage regulation. The $900 TMM option certainly stacks up well against the true cost of using conventional electromechanical temperature controls.

Click here for technical paper on TMM functions

Even greater value from the REG-D/REG-DA is being obtained by many of our NZ customers. The regulator is being used as the marshalling point for all status and alarm points from around the transformer. This information can then be simply report these back to SCADA via DNP 3:000 serial Modbus or IEC 61850 over copper or fibre.

Text Book - Numerical Distance Protection, Principles and Applications

Gerhard Ziegler has been involved with power system protection for over 35 years, working for a world leader in design and manufacturing and representing Germany on IEC technical committees for measuring relays and protection equipment. His 1999 publication was updated in 2005, following major network outages, to give greater detail on distance zone back-up protection.

This book is aimed at young (and other) engineers who wish to familiarise themselves with the subject of distance protection, its application. Furthermore it serves as a reference guide for solving particular application problems.

HV Power has limited stocks of this book available for NZ$90.00+GST.

Text book - Numerical Differential Protection, Principles and Applications

Also by Gerhard Ziegler, this text book provides over 240 pages of information on transformer differential, line differential and busbar differential protection, measuring techniques, CT parameters and communication options.

HV Power has limited stocks of this book available for NZ$90.00+GST, or purchase both text books for NZ$170.00+GST.

Additional learning resources on protection

HV Power also has available on CD various training presentations and reference material on differential protection and generator protection; used by Siemens Nikolaus Mueller during the series of half day seminars HV Power ran late last year.

Commentary:

Adding value

Rather than blindly launching a new product into the New Zealand market, HV Power firstly determines a level of suitability. When we offer any new product, we want to be confident that it is applicable to our NZ customers. Does the product have significant advantages over existing practices or products? Does the device offer a clear economic benefit e.g, by providing better information, greater reliability, or perhaps its new technology offering a competitive price point?

Our staff have considerable industry knowledge, but occasionally new potential products are outside of our core expertise. While our suppliers are product and application experts, often the New Zealand environment has unique attributes. Therefore we call upon selected customers to ask their experience. The results of these discussions often highlight common industry concerns and provide us with a template for product evaluation.

Many thanks to those of you we’ve recently contacted with regard to new product initiatives. Your input has been extremely valuable in ensuring HV Power continue to provide products, services and support that adds real value to your networks.

Regards

Warwick Beech
Business Development Manager

Continuous monitoring of network quality

For network performance engineers, benchmark studies are a very important resource . What was the power quality like before the installation of a new network asset? What was the quality prior to a large customer’s plant expansion? There is growing interest by lines companies to have permanently installed power quality equipment to allow measurement data to be gathered in the field. Using distributed power analyzers, connected via existing substation communications, it is now possible to record power measurements on a network wide basis to a central database. These multipurpose tools provide fault records, power quality “event” information and historical trend measurements. Recently A.Eberle announced expansion to both their PQ-ID range of permanently installed logging devices, and to the WinPQ software for database management and interrogation. Contact us for details.

DIGSI status:

Latest version of DIGSI is 4.81

DIGSI 4.80 and OMICRON PTL

With DIGSI 4.80 it is possible to export SIPROTEC 4 relay parameters in XRIO format.

The XRIO format expands upon the earlier RIO format, allowing not just distance protection settings, but all protection settings to be exported.

IEC 61850 validation tool

www.61850.com provides a convenient validator to confirm that the SCL files you generate are in conformance with IEC 61850-6. Both SCD and ICD files are supported.

HV Power Customer Newsletter