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GVR RecloserFor Pole Mounting and Substation Application
www.fki-et.comwww.fitandforget.comwww.fkiswitchgear.com
FkiFit&ForgetTechnology
TM
From a new generation of intelligent switchgear, the GVR
brings the reliability of modern materials and technology
to overhead distribution networks, achieving a lifetime of
maintenance free operation.*
Key Features
The Whipp & Bourne patented, single coil magnetic
actuator mechanism which allows the GVR to operate
independently of the MV supply and to be tested in an
ordinary workshop.
Environmentally friendly vacuum interruption
produces no by-products.
The lightweight aluminium tank makes the GVR
easier to transport and install.
The EPDM or silicone rubber bushings are resistant
to damage from vandalism or mishandling.
By extensive use of insulated mouldings, in particular
the bushings, the total number of parts has been
reduced by a factor of x20 and the number of moving
parts by x50.
No scheduled maintenance for 30 years*
With a Choice of Protection
Polarr
The standard Polarr relay offers full auto-reclose
protection and control functionality. Its long life
lithium batteries eliminate the need for an auxiliary
supply.
Panacea
Alternatively, the Panacea offers the highest levels
of control and protection for improved distribution
network performance, from directional auto-reclosing
for closed loop schemes to full remote control
utilising the DNP3.0 protocol.
FIT AND FORGET RECLOSER
* Excludes control battery replacement
10 yrs or 10,000 ops for lithium batteries, 5 yrs for lead acid batteries.
GVR
Environmental Design
The award-winning* GVR gas-filled vacuum recloser
combines the high reliability of vacuum interruption
with the controlled environment and high dielectric
strength of SF6, in a compact, maintenance-free
unit. Since SF6 is only used as insulation, there is
no health hazard from toxic by-products of arcing.
Electrical life is well in excess of ANSI requirements.
The patented, single coil magnetic actuator provides
consistent performance and a dramatic reduction in
the number of moving parts. Materials and finishes
have been carefully chosen for reliability - from
EPDM bushings, tested for tracking and erosion to
IEC 61109, in salt, fog and other environments, to the
neodymium iron boron permanent magnets used in
the mechanism.
Application
The GVR can be pole mounted or substation mounted
and can operate as a stand alone recloser without
the need for an additional auxiliary supply, or it can
be integrated into the most advanced distribution
automation schemes.
By using the advanced control and protection
functions of the Panacea, the GVR can also be used
in applications where reclosers have not traditionally
been used such as closed rings and underfrequency
load shedding schemes.
* Queens Award for Technological Achievement and the MacRobert Award, both awarded in 1997.
Main Features
Single piece, aluminium or copper-cored EPDM
or silicone rubber bushings, with grooves to take
optional wildlife guards/MV boots.
Current transformers are mounted within the tank's
controlled environment, while optional capacitive
voltage dividers provide voltage signals for use by
the Panacea or an RTU.
Aluminium housing with lightweight, moulded
baseplate, secured by stainless steel bolts and
incorporating rubber 'O' ring seals.
Pressure-relief disc, to comply with IEC 60298
Appendix AA, offers the highest levels of safety.
Mechanical ON/OFF position indication visible through
clear viewing window from ground level.
Hook stick-operated manual trip and lockout control.
A single moulding supports the three phase vacuum
interrupter assembly, magnetic actuator mechanism
and one-piece drive beam.
The patented, single coil magnetic actuator is based
on a solenoid plunger, held in the tripped or closed
position by a permanent magnet.
Vacuum Bottles in Monoblock
ATTENTION TO ENGINEERING DETAIL
Magnetic Actuator
1
3
4
5
6
7
2
8
1
2
4
3
56
7
8
6
Patented, Single Coil Magnetic Actuator
The actuator coil is energised in one direction to
'power close' the GVR and in the opposite direction
to open it by de-latching the holding force. This is a
unique feature of the single coil actuator design used
in the GVR and ensures reliable tripping operation
under all battery conditions and even for manual trip.
Closing
The bi-stable design ensures that the plunger is
held back in the open position (1) until the solenoid
current rises above the level required to guarantee
closure. Once the holding force is overcome (2), the
circuit breaker closes positively (3), due to the stored
energy in the solenoid and permanent magnets.
Tripping
The solenoid is energised in the reverse direction (4)
to overcome the magnetic hold-on force and de-
latch the actuator. Opening is then completed by the
energy stored during the closing stroke in the contact
pressure and opening springs and is completely
independent of the power supply during electrical
opening, and of the operator during manual opening.
The energy required to trip is approximately 1/30th of
that required to close.
Umbilical Cable Plug and Socket on GVR Tank
Position Indication
Magnetic flux from Permanent magnet
Actuator coil
Armature
Permanent magnet
Non magnetic drive rod
1
Magnetic flux from actuator coil
Closing current
Drive rod movement
2
Magnetic flux from Permanent magnet
Contact pressure springs compressed
3
Drive rod movement caused by spring pressure
Tripping current
4
CONTROL AND PROTECTION
POLARR
Principle of Operation
The Polarr is the standard relay package for the
GVR. It measures the 3 phase and residual currents
using CTs located in the GVR, and performs auto-
reclosing over current, earth fault and sensitive earth
fault protection. The low power, microprocessor
architecture of the Polarr is unique to the power
industry. Its design has been perfected over several
years and offers the user significant benefits
through the elimination of the need for any external
power supply. In addition to this, the Polarr offers
several advanced auto-reclosing functions in a
comprehensive but cost effective package.
Weather Protection
The Polarr relay and control batteries are housed in
a control box located on the pole at ground height
underneath the GVR. Connection to the GVR is via an
umbilical cable and weather proof plug and socket
that is used to carry the CT currents and the GVR
control signals. The IP56 sealed control box is made
from stainless steel, with an outer double skinned
sun shield of polyester-coated galvatite.
It protects against the harshest environment and
maintains an even internal temperature keeping the
relay condensation-free.
Control Batteries
High energy density lithium battery technology makes
the GVR with Polarr ideal for applications where an
auxiliary power supply is not available.
Alternatively, where an auxiliary supply is already
available, or when one is required to power an
additional RTU and communications equipment,
rechargeable lead acid batteries can be supplied
as an option.
Local Control
Push-buttons are provided for the standard auto-
recloser functions, while separate keys and LED
indication are used for the circuit breaker control.
Remote Control
All of these functions are also available through
a parallel SCADA port on the back of the relay,
accessible through a gland plate in the control box.
Voltage free contacts and opto-isolated inputs offer
a standard interface to a third party RTU of the
customer's choice. Alternatively, an enlarged control
box to house an RTU and rechargeable battery pack
can be provided. More advanced remote control
functionality is provided by the Panacea.
Programming Protection Settings
Protection settings can be programmed via the dot
matrix display and keypad or downloaded though the
serial port from a notebook computer using libraries
of settings created in Windows based software.
Data Logging
Historical, diagnostic and load current data can be
accessed through the local display or the serial port.
The Polarr history is held in non-volatile memory, and
includes the time and date of the last 20 sequences
together with the number of trips in the sequence and
fault magnitude of each of the elements.
Minimum Trip Currents
The multi-ratio CTs located in the GVR and a wide
range of programmable minimum trip settings
ensure that the GVR and Polarr can be used at any
point in the network, from substation through to the
feeder ends with the earth fault currents as low as
one ampere.
Short Cut Keys
In addition to large, clear control keys, LED indication
and a menu-driven display for entering settings
and viewing historic data, the front panel also
incorporates three push-buttons for instant access
to load current, fault target and battery condition
information.
Sequence Co-ordination
The Polarr's advance sequence co-ordination logic
and fast response times of the relay allow co-
ordinating delays as low as 60mS to ensure that
only the recloser closest to the fault operates.
User friendly windows software for programming settings
and viewing history.
GVR Control and Diagnostics
Operation of the GVR actuator is through energy
stored in long life capacitors.
Uninterruptable Power Supply
The Panacea Uninterruptable Power Supply (UPS)
is suitable for 120 vac. It includes a long life 24 volt
lead acid battery for standby use, with temperature
controlled charging and a battery test facility.
The UPS module monitors the auxiliary supply status,
operating characteristics and battery temperature
to ensure continuity of supply under all operating
conditions.
CONTROL AND PROTECTION
The Panacea is based on the SEL 351R Relay and includes
many features only associated with substation class
protection, offering the optimum in the control and protection
of distribution networks. The Panacea includes:
Advanced control and protection functions including
directional protection, voltage synchronisation, load
encroachment logic and underfrequency load shedding.
An intelligent communications port for direct connection
to a radio or modem, eliminating the need for an
additional Remote Terminal Unit and so saving on the
overall purchase price.
The Power System Variables
The line and residual currents are measured using
CT's located inside the GVR. The voltage on both sides
of the GVR and the residual voltage are taken from
internal capacitive dividers or external VT's. The output
of these transducers is produced in the Protection and
Measurement module using a combination of high speed
analogue circuitry and digital signal processing.
Protection
In addition to directional over current, earth fault and
sensitive earth fault auto-reclose protection, advanced
directional earth fault algorithms allow the Panacea
to make an automatic selection of the best earth fault
directional element for the system conditions. Other
protection features such as load encroachment logic and
underfrequency load shedding increase the functionality
of the GVR to levels previously only available in complex
substation schemes.
PANACEA (351P)
Metering and Load Profile
The power system variables including the volts, amps,
watts and vars, can be viewed in real time on the
Panacea front panel or remotely through the serial
port. It is also possible to average the current and
voltage measurements over 5, 15, 30 or 60 minute
periods to produce a load profile. This can be stored
in memory and later downloaded through the local or
remote serial ports.
Event Reporting
The Panacea can be set up to record various events
such as loss of auxiliary power or a protection
event. Up to 512 events can be stored in non-volatile
memory, each one date and time-stamped. This is
supported by a separate oscillogram report showing
up to thirty 15-cycle or fifteen 30-cycle reports.
Local Control
The Panacea local control panel offers the same
basic functionality as the Polarr. Local LED indication
has been increased to offer even greater operational
and system status information.
Remote Control
The Panacea controls, status indication, settings
and history are available remotely through one of 2
serial ports on the back of the relay. It is possible
to connect directly to a radio or modem and to
communicate with a SCADA system using the DNP3.0
protocol (other protocols available on request). Space
is provided in the control box to mount a suitable
radio or modem and the UPS provides a 12 volt 0.5
amp fused supply.
Capacitive Voltage Sensing (CVTs)
Located inside the GVR, these CVTs are a low cost
method of measuring source and load voltage. They
can be used with the Panacea for direct voltage
measurement.
The Loop Scheme Control System (LSCS)
The Loop Scheme Control System (LSCS) is used to
automatically restrict permanent faults to a smaller
section of a distribution system, whilst maintaining supply
to the un-faulted sections. For a typical five recloser
based Loop Scheme, a permanent fault anywhere on
either feeder should never result in the loss of more than
one third of the load on the affected feeder. Using the
power and flexibility of SELogic a customer specific logic
scheme can be developed.
The SEL-351R Recloser Control
For recloser users whose policy it is to standardise
on the Schweitzer 351-R Protection and Control rather
than the Panacea, then the option is available. The SEL-
351R Recloser Control combines traditional recloser
control functions with technologically advanced SEL
relaying features.
In the USA, Schweitzer Engineering Laboratories provide
complete technical support for the entire control cabinet.
User friendly Windows based software for EZ settings and history retrieval (above)
SUMMARY OF PROTECTION CHARACTERISTICS
Operating Sequence
Up to 4 trips to lockout are available for over current,
earth fault and sensitive earth fault sequences. The
time between GVR clearing the fault and reclosing
is known as the dead time and is selectable for
each trip. If the fault is temporary, the protection
will begin to reclaim after reclosing. If the fault is
permanent, the GVR will lockout after the last trip.
A Cold Load Pickup feature avoids spurious tripping
when manually closing onto de-energised loads.
Time Current Characteristics
Time current characteristics are programmable for
every trip in the sequence. There is a choice of time
dependant curves of definite time. The curves can be
modified using time multipliers, additional delays and
minimum response times. Instantaneous protection
offers the fastest fault clearing times and can be used
with additional delays for sequence co-ordination.
Minimum Trip Settings
The combination of multi-tapped protection CTs and
the range of trip settings within Polarr and Panacea
relays ensure suitable operation at any point in a
network.
Directional Control
Phase and ground directional elements are standard
features of the Panacea. Direction and polarization
settings are available for the control of the phase
elements, earth fault elements and the negative
sequence elements.
Polarization quantities include positive sequence
voltage, negative sequence voltage and zero sequence
voltage.
Polarr Panacea
Trips to lockout 1 to 4
Dead times (S) 0.25 to 180 0.25* to 180
Reclaim time (S) 5 to 180
Polarr Panacea
Curves (t>) IEC 255 (IDMTL, VIDMTL, EIDMTL) & McGraw Edison
Inst. 1>> (xln) 1-20 times 1-30 times
Polarr Panacea
CT Ratio 300/200/100 400:1 or 250:1
1> (xln) 0.2 to 3.2 0.1 to 3.2
1o> (xln) 0.1 to 1.6 0.005 to 3.2
1osef>(xln) 0.01 to 0.16 0.005 to 1.5
* 0.25 for 1st dead time, 0.75 minimum for 2nd and 3rd dead times in sequence
* Ratings for 150kV impulse version.
Accuracy
Protection +/- 5% of time to IEC255
Instrumentation up to 1% for Panacea
Voltage measurement +/- 3% with CVTs or 1% with VT.
Type Tests
General ANSI C37.60
Electromagnetic IEC 801
Protection IEC 255
Umbilical Dimensions
Dimensions “L” Cable Length
Up to 2000 3000
2001 - 3000 4000
3001 - 4000 5000
4001 - 5000 6000
Bushing Dimensions
Dimensions
Voltage Creepage A B C D
Up to 27kV 830mm 369 286 571 298
38kv 1178mm 469 312 623 272
Typical Substation Support
Pole MountedSubstation Mounted
Electronic Control Unit
Battery Power pack
Low Voltage Umbilical Lead
Manual Trip/Lock Out(hook stick)
Dim
ensi
on "
L"
175
280
c
b
d
a
434
O620
Ratings (ANSI C37.60 or better)
GVR 15 GVR 27 GVR 38
Maximum System Voltage kVrms 15.5 27 38
Continuous Current Amp 630 630 630
Interrupting Current kA 12.5 / 16 12.5 10
Impulse Voltage Withstand kV peak 110 125 / 150 150 (internal) 170 (external)
Power Frequency Withstand Dry kVrms 50 for 60 secs 60 for 60 secs 70 for 60 secs
Power Frequency Withstand Wet kVrms 50 for 60 secs 50 for 60 secs 60 for 60 secs
Rated Gas Pressure for Above Atmospheric Atmospheric / 0.3 bar* 0.3 bar (gauge)
Number of Operations with No Maintenance 10,000 10,000 10,000
Weight kgs 145 145 / 155* 155
Switchgear Works, Castleton, Rochdale, Lancashire UK OL11 2SS Tel: +44 (0)1706 632051 Fax: +44 (0)1706 674236
Whipp & Bourne Inc.2500 Almeda Avenue, Suite 115, Norfolk USA VA 23513
Tel: +1 (0) 757 858 8972 Fax: +1 (0) 757 858 [email protected]
Newport Road, Blackwood, South Wales UK NP12 2XH Tel: +44 (0)1495 223001 Fax: +44 (0)1495 225674
Hawker Siddeley Switchgear Pty Brisbane AustraliaPO Box 36, Kallangur, Qld 4503, Australia
Tel: +61 (0) 7 3888 1455 Fax: +61 (0) 7 3888 [email protected]
www.hssaustralia.com
FKI Switchgear South AmericaCarrera 21 No 86A-31 of 101, Bogota, Colombia
Tel: +57 (0) 1 256 4617 Fax: +57 (0) 1 655 [email protected]
PART OF THE FKI GROUP OF COMPANIES
www.fki-et.com www.fitandforget.com
www.fkiswitchgear.com
Feb 2005
The Design and manufacture of our products are subject to constant review, therefore slight variation may occur between the details given and the equipment supplied.
