Offshore Spotlight | ENERGY
Issue 05 | Sep 2015 | www.siemens.com/reyrolle
Current Matters
Siemens Protection Devices Ltd
Protecting your electrical assets ...
today and tomorrow
The Latest
information
from SPDL
Product features & Sales release,
advertisement featured in Pac
World and more.
1
Articles
017SR45 Argus
Self Powered Overcurrent
Protection Relay Available Now
027SR1x Argus
The first 7SR1x Argus OC & EF
devices have been delivered for
a contract in Oman
Welcome to
issue five
03New Product
App
The new Siemens app is here
04Product
Training
TLQ Sales training will be held
in Hebburn, UK
Dear reader,
Welcome to the latest edition of Current Matters. In this edition
we would like to introduce; the latest feature to the 7SR220
Argus Relay; Load Blinders and the sales release of the 7SR45
Argus Self powered overcurrent protection Relay.
In this issue you will also find information on the 2015 Asia
Pacific EA Sales conference and the first delivery of 7SR1x with
IEC61850 to Oman.
I hope you enjoy reading our latest news and if you are
interested in receiving more detailed information please
contact bruce.watson@siemens.com
Editor
Bruce Watson
Head of business development
and marketing
05Load Blinders
New feature
067SR11 and
7SR12
Latest Product News
07Asia Pacific
EA Sales
Conference
Reyrolle product updates were
presented by an
SPDL Representative
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a
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Ava ow!
n
7SR45 – Argus
Self Powered Overcurrent Protection Relay
The 7SR45 self powered overcurrent and
earth fault protection relay is primarily
intended for use in Ring Main Units.
The 7SR45 numeric relay provides both definite time
and inverse time overcurrent and earth fault
protection functions. The 4 current inputs are
designed to ensure sensitivity with a minimum
operate setting of 0.2 x In. The compact non drawout design provides front fascia navigation keys, LCD
display and front USB port for parameterisation.
The relay is powered directly by the current
transformers and does not require connection to an
auxiliary supply. Configuration can be done from the
fascia or via Reydisp Evolution PC Software,
available to download from the website.
Key Functions
ANSI
Function Description
50
Instantaneous Overcurrent
50N
Instantaneous Derived Earth Fault
50G
Instantaneous Measured Earth Fault
51
Time Delayed Overcurrent
51N
Time Delayed Derived Earth Fault
51G
Time Delayed Measured Earth Fault
50LC
Line Check / Switch On To Fault
Inrush Restraint
siemens.com/reyrolle
3
First Delivery of Reyrolle 7SR1x
Argus OC & EF Relays with IEC
61850 Communications
The first 7SR1x Argus
OC & EF devices with
integral IEC 61850
communications have
been delivered for a
contract in the
Sultanate of Oman.
A total of 31-pieces of 7SR11 Argus non-directional
OC & EF and 7SR12 Argus directional OC & EF relays
were provided to Muscat Electricity Distribution
Company (MEDC) for their Al-Ghubra North Project.
The relays were supplied via Al Hassan Switchgear
Manufacturing Company LLC (AHSG) who are based
in Muscat and are one of the largest established and
integrated manufacturers in the Gulf Region in terms
of turnover, product range and technology.
MEDC is responsible for the distribution and supply
of electricity in the Governorate of Muscat as per the
license granted by the Authority for Electricity
Regulation in Oman.
MEDC provides electricity for all residential,
commercial, industrial, agricultural and Government
sectors in the Muscat area.
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New
Product App!
The Siemens AG product app is
a guide for protection, Energy
Automation and Power Quality.
It enables you to always find
the right Siemens device for
your application.
¡¡ App for Android available in the
Google Play Store and for iOS in the
Apple iTunes Store for iPad
¡¡ English / German Language option
¡¡ Optimized for use with 7” and 10”
tablets
Reyrolle
Product
Training
2nd to 6th
November
TLQ Sales training will be
held in Hebburn, UK.
The sales training course is aimed for EA people who will
work in the offer preparation and sales persons providing
an overview of the product range, and a basic hands on
for operating the relays and software tools.
A detailed agenda, time table, information about the
location, will be provided closer to the time.
All trainings are free of charge (except travel expenses and
accommodation) and have the aim to support our regional
partners with the necessary knowledge to work
autonomously and successfully in the business field of EA.
Please contact your SPDL Regional Sales representative if
you wish to participate.
5
5
New
Feat
ure
Load Blinders
Growth of Distributed Generation
Load Blinders are used with overcurrent
elements to block tripping during periods
of high reverse load currents that can
occur in distribution networks.
GENERATORS
One of the major factors contributing to
high reverse load conditions is an increase
of installed distributed generation capacity
which can feed power back into the
network contrary to the normal direction
of power flow. This can result in current
levels above the relay setting and can
cause tripping of overcurrent elements.
TRANSMISSION NETWORK
DISTRIBUTION
NETWORK
Reverse load Power Factor may be
expected to be high but could be low
where significant VAr support is provided
by the Distributed Generators.
G
UTILISATION
7SR220 - Argus
A load blinder element is provided in
the 7SR22 relay with two operating
modes, three-phase and single-phase
¡¡ Application
¡¡ Theory
¡¡ Principle of Operation
¡¡ Settings
¡¡ Demo Tests
7R22
Additional Functions:
¡¡ Core functionality is OC protection.
¡¡ Flexible multi-characteristic
directional protection. Can be
applied to all circuit types
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6
50
AFD
67
M
E
T
E
R
S
M
Load Blinders
Growth of Distributed Generation
3 Phase Load Blinder
The 3-Phase Load Blinder is intended to block protection only during definable allowable
system power flow conditions i.e. a 21LB-3P blocking signal is only issued when:
¡¡ Positive Sequence Voltage Vpps is not significantly reduced i.e. is above the 21LB-3P
VPPS Setting AND
¡¡ Negative Sequence Current Inps is lower than 21LB-3P INPS Setting AND
¡¡ The impedance measured in all phases is within the operate zone
¡¡ Zpps is calculated from Vpps and Ipps. The calculated Zpps is used to determine if the
impedance is in the operate zone i.e. greater than the 21LB-3P Impedance setting and
less than the 21LB-3P Angle settings. Suitable settings can be chosen to provide
overcurrent blocking in the forward or reverse directions.
+X
b
a
b
-R
c
a = 21LB-3P Impedance setting
b = 21LB-3P Angle +ve setting
c = 21LB-3P Angle -ve setting
FWD Load
Blinder
OC Block
Output
+R
c
-X
Single Phase Load Blinder
The single phase load blinder can provide phase segregated blocking. The blinder is
operated when:
¡¡ Positive Sequence Voltage Vpps is not significantly changed i.e. is above the 21LB-1P
VPPS setting AND
¡¡ Zero Sequence Current Izps is lower than 21LB-1P IZPS Setting AND
¡¡ The impedance measured per phase is within the operate zone
¡¡ Zphase is calculated from Vphase (peak) and Iphase (peak). The calculated Zphase is
used to determine if the impedance for that phase is in the operate zone i.e. greater
than 21LB-1P Impedance setting and less than 21LB-1P Angle settings.
¡¡ Suitable settings can be chosen to provide outputs in the forward or reverse directions.
7
7
7SR11 and
7SR12 Relay
Latest Product News
Sales and delivery release for the latest
firmware is planned for October 2015.
New Features include:
¡¡ 50AFD Arc Flash Detection in both the
7SR11 and 7SR12
¡¡ 32 Power in the 7SR12
¡¡ 32SEF Sensitive Power in the 7SR12
¡¡ 55 Power Factor in the 7SR12
EA Sales
Conference 2014
The Asia Pacific EA Sales
Conference 2015 was held at
The Grand Ho Tram Strip, Ho
Chi Minh City, Vietnam.
Organised by Siemens EA Head Quarters, the event was
attended by 40 participants from all over the Asia Pacific
Region. Topics discussed during the conference included
updates from EA PRO and SYS products and solutions,
Manufacturing, Repairs & Returns / Product Quality, Cross
Border Management and New Technologies. Team
Building activities and Workshops were also part of the
agenda. Reyrolle product updates were presented by an
SPDL Representative.
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Siemens Protection Devices Ltd
North Farm Road
Hebburn
Tyne and Wear
NE31 1LX
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