Download TECHNICAL DETAILS of THE TEST SYSTEMS

HIZAL ELEKTROEROZYON SANAYİ ve TİCARET LTD.
TuranÇiğdem Cad.No.3 OSTİM V.D. Ark. ANKARA-TURKEY
Tel: (90) 0 - (312) 354 00 82 , 354 67 16 Fax: (90) 0 - (312) 354 54 98
www.hizaledm.com , [email protected]
TECHNICAL DETAILS of THE TEST SYSTEMS
A ) 2MV LIGHTNING IMPULSE TEST SYSTEM
SCOPE of THE EQUIPMENT
2.4 MV (No Load) impulse generator
200 kV DC Charging Unit
2.4 MV Capacitive Voltage Divider
Lightning Impulse Resistor Groups
Safety Grounding Sytems
Control and Measurement Cables
Impulse Generator Control Unit
Double Beam Digital Storage Oscilloscope
Operation / Maintanence Instructions and Test Reports
Installation on Site and Operator Training
DETAILED SPECIFICATIONS
2.4 MV Impulse Generator
The Impulse Generator is of Marx multiplier circuit design consisting of 12 stages ,
each stage having the following technical specifications ;
Stage capacitance
Maximum Charging Voltage per Stage
No of Capacitors per stage
:
:
:
125 nF
200 kV
2
Other characteristics of the Impulse Generator are as follows :
Total Number of Stages
Total Impulse capacitance
Maximum Charging Voltage
Maximum Energy Stored
:
:
:
:
12
8.33 nF
2.4 MV
24 kJoules
1
The Impulse Generator is constructed from nonhydroscobic insulating materials on a
steel frame which also carries the charging unit for improved stability. The
generator is designed for minimum internal inductance with proper resistive
compensation to prevent oscillations and ringing. The stages of the generator are
normally connected in series , however when required any number of stages can be
used at one time and also they can be connected in parallel and series combinations
to adjust the voltage and energy of the generator for a given load . The generator is
equipped by automatic safety grounding systems which discharges the generator
energy when the power is switched off or on a power outage. A set of wave shaping
resistors are supplied with the generator in order to adjust the impulse waveshape
for different loads.
DC Charging Unit
The DC charging unit of the Impulse Generator has the following specifications :
Maximum DC Output Voltage
Maximum Continuous Output Current
Intermittent Max. Current ( 50 % duty cycle )
Input Power requirement
: 200 kV
: 100 mA
: 150 mA
: 220 Volt , 50 Hz , 100 Amp. Max.
2.4 MV Capacitive Voltage Divider
A multiunit damped capacitive voltage divider of noninductive design is supplied with
the following characteristics ;
Maximum Impulse Voltage
Waveshape for correct Calibration
Total HV Arm capacitance
Number of HV arm capacitor
Maximum Response Time
Number of Interchangable LV Arm Units
:
:
:
:
:
:
2.4 MV peak
1.2 / 50 µsec Lightning Impulse
600 pF
2 of 1200 pF
0.1 µsec
3
An additional Oscilloscope Input Divider Unit is also supplied for further dividing
the signal by a factor of 3 .
Lightning Impulse Resistor Groups
The resistors of the Impulse Generator are of three groups , namely the charging
resistors , the wavefront resistors and the wave tail resistors . the charging resistors
are normal wirewound resistors whereas the other are noninductive wirewound (
bifilar ) resistors. All the resistors are epoxy varnished and placed in protective
housings for stability and long life. There are charging , front and tail resistors in
each stage of the generator as well as external resistors for easy and quick
adjustment of the waveshape.
2
The internal waveshaping resistors can also be fitted and removed easily
adjusting the generator parameters for different loads .
for
Safety Grounding Sytems
The Impulse generator is equipped with an
discharges the generator capacitors through
switched off , a motor operated grounding
capacitors in the generator to ensure safety
generator resistors or connections and a
safety.
automatic grounding system which
suitable resistors when the energy is
system which short circuits all the
when it is necessary to change the
manual grounding rod for improved
Control and Measurement Cables
Control and measurement cables are used to operate the generator remotely from a
control room and to transmit the voltage divider output signal to the oscilloscope
in the control room . these are properly shielded and coaxial cables of 20 m
length.
Impulse Generator Control Unit
The Impulse Generator Control Unit consist of charging voltage supply which is
smoothly adjustable from zero to the maximum value , a digital charging voltage
meter and generator firing and grounding controls. The unit is also equipped with
an isolating transformer and HF filter system in order to supply the measuring
Oscilloscope from a safe and noise free source .
Double Beam Digital Storage Oscilloscope
A 60 MHz , 200 Msps , Digital storage Oscilloscope with two channels is supplied
with the Impulse Measurement System. The Oscilloscope comes with the necessary
software and cable / terminal for transferring the recorded waveforms to a PC for
printing and documentation
3
B) 600 KV, 50 mA HIGH VOLTAGE AC TEST SYSTEM
SCOPE of THE EQUIPMENT
High Voltage Test Transformer
High Voltage AC Voltage Divider
Current Transformer
Control Unit
Overcurrent Protective resistor
Supply and Measurement Cables
Technical Documents and Users Manual
Installation and Training
DETAILED SPECIFICATIONS
High Voltage Test Transformer
High Voltage Test Transformer has the following specifications :
Insulation :
Oil impregnated paper under high vacuum ( < 0.1 mm Hg.)
Maximum Output Voltage :
600 kV
Maximum Continuous Output Current : 50 mA
Maximum Intermittent Output Current : 100 mA at 20
% Duty cycle
Design : Two units in Cascade , 300 kV s each.
High Voltage AC Voltage Divider
This system enables a direct and accurate measurement of the voltage applied to the
test object.
Design : Multiunit resistive HV column with calibrated LV arm and measurement
cable
HV Arm resistance : Approx. 2000 MOhm
Divider Ratio
: 1/2000
Current Transformer
1/1 transformer connected to the ground end of the HV winding. to provide safe
isolation between HV winding and the measurement system
4
Control Unit
This unit consists of a variac controlled power supply to the primary (LV)
winding of the test transformer and a digital voltmeter for the HV divider output a
mA meter for the test current which flows through the HV winding.
Overcurrent Protective resistor
This resistor protects the tranformer winding from overcurrents when a short circuit
occurs in or across the test object by limiting the short circuit current to a safe value.
The resistor has a value of approx. 1 Mohm and rated for short duration overcurrents
( < 1 sec)
Supply and Measurement Cables
These are the cables of approx. 20 m length used for supplying the power to the
transformer’s primary winding and for the measurement of the load voltage and
load current .
5
C.
220 KV LIGHTNING IMPULSE TEST SYSTEM
TECHNICAL DETAILS of THE TEST SYSTEM
SCOPE of THE EQUIPMENT
220 kV (No Load) impulse generator
110 kV DC Charging Unit
220 kV Capacitive Voltage Divider
Lightning Impulse Resistor Groups
Safety Grounding Sytem
Control and Measurement Cables
Impulse Generator Control Unit
Double Beam Digital Storage Oscilloscope
Operation / Maintanence Instructions and Test Reports
DETAILED SPECIFICATIONS
220 kV Impulse Generator
The Impulse Generator is of Marx multiplier circuit design consisting of 2 stages ,
each stage having the following technical specifications ;
Stage capacitance
:
250 nF
Maximum Charging Voltage per Stage
:
110 kV
No of Capacitors per stage
:
2
Other characteristics of the Impulse Generator are as follows :
6
Total Number of Stages
: 2
Total Impulse capacitance
: 125 nF
Maximum Charging Voltage
: 220 kV
Maximum Energy Stored
: 3
MV
kJoules
The Impulse Generator is constructed from nonhydroscobic insulating materials on a
steel frame
generator
which also carries the charging unit for improved stability. The
is designed for
compensation
to prevent
minimum internal inductance
with
proper
resistive
oscillations and ringing. The stages of the generator are
normally connected in series , however when required any number of stages can be
used at one time and also they can be connected in parallel and series combinations
to adjust the voltage and energy of the generator for a given load . The generator is
equipped by automatic safety grounding systems which discharges the generator
energy when the power is switched off or on a power outage. A set of wave shaping
resistors are supplied with the generator in order to adjust the impulse waveshape
for different loads.
DC Charging Unit
The DC charging unit of the Impulse Generator has the following specifications :
Maximum DC Output Voltage
:
110 kV
Maximum Continuous Output Current
: 100 mA
Intermittent Max. Current ( 50 % duty cycle ) : 150 mA
Input Power requirement
:
220 Volt , 50 Hz , 20 Amp. Max.
220 kV Capacitive Voltage Divider
A multiunit damped capacitive voltage divider of noninductive design is supplied with
the following characteristics ;
7
Maximum Impulse Voltage
:
Waveshape for correct Calibration
:
220 kV peak
1.2 / 50 µsec
Total HV Arm capacitance
:
200 pF
Number of HV arm capacitor
:
200 pF
Maximum Response Time
:
0.1 µsec
Number of Interchangable LV Arm Units
:
1
Lightning Impulse
Lightning Impulse Resistor Groups
The resistors of the Impulse Generator
are of three groups , namely
the charging
resistors , the wavefront resistors and the wave tail resistors . the charging resistors
are normal wirewound resistors whereas the other are noninductive wirewound (
bifilar ) resistors. All the resistors are
epoxy varnished and placed in protective
housings for stability and long life. There are charging , front and tail resistors in
each stage of the generator
as well as external resistors
for easy and quick
adjustment of the waveshape.
The internal waveshaping resistors can also be fitted and removed easily
for
adjusting the generator parameters for different loads .
Safety Grounding Sytems
The Impulse generator is equipped with an
discharges the generator
switched off ,
capacitors through
suitable resistors
when the energy is
a motor operated grounding system which short circuits all the
capacitors in the generator to ensure
generator
automatic grounding system which
resistors
safety when it is necessary to change the
or connections and a
manual grounding rod for improved
safety.
Control and Measurement Cables
8
Control and measurement cables are used to operate the generator remotely from a
control room and to transmit the voltage divider output signal to the oscilloscope
in the control room . these are properly shielded and coaxial cables of
8 m
length.
Impulse Generator Control Unit
The Impulse Generator Control Unit consist of
charging voltage supply which is
smoothly adjustable from zero to the maximum value , a digital charging voltage
meter and generator firing and grounding controls. The unit is also equipped with
an isolating transformer and HF filter system in order to supply the measuring
Oscilloscope from a safe and noise free source .
Double Beam Digital Storage Oscilloscope
A 20 MHz , 200 Msps , Digital storage Oscilloscope with two channels is supplied
with the Impulse Measurement System. The Oscilloscope comes with the necessary
software and cable / terminal for transferring the recorded waveforms to a PC for
printing and documentation
Operation and Maintanence
An operators manual is supplied
studied before oparating
with the equipment
the generator
for maximum
which should be carefully
safety
and trouble free
operation. The system is almost maintanence free except periodic cleaning and
removing dust from the insulating parts and the sphere-gaps. During transport and
installation , it should be
assembly and resistors
are
carefully observed that the generator’s
protected from bending , mechanical
sphere-gap
forces
and
displacement . The sphere-gaps are accurately adjusted for consistent firing of the
generator.
9
100 KV, 50 mA HIGH VOLTAGE AC TEST SYSTEM
TECHNICAL DETAILS of THE TEST SYSTEMS
SCOPE of THE EQUIPMENT
High Voltage Test Transformer
High Voltage AC Voltage Divider
Current Shunt
Control Unit
Overcurrent Protective resistor
Supply and Measurement Cables
Technical Documents and Users Manual
DETAILED SPECIFICATIONS
High Voltage Test Transformer
High Voltage Test Transformer has the following specifications :
Insulation :
Oil impregnated paper under high vacuum ( < 0.1 mm Hg.)
Maximum Output Voltage
: 100 kV
Maximum Continuous Output Current : 50 mA
Maximum Intermittent Output Current : 100 mA at % 50 duty cycle , 150 mA
at 20 % Duty cycle
Design : Two units in Cascade , 50 kV s each.
High Voltage AC Voltage Divider
This system enables a direct and accurate measurement of the voltage applied to the
test object.
Design : Multiunit resistive HV column with calibrated LV arm and measurement
cable
HV Arm resistance : Approx. 300 MOhm
Divider Ratio
: 1/1000
Current measurement Shunt
Shunt resistor connected to the ground end of the HV winding. to provide safe and
accurate measurement of the HV winding current .
10
Control Unit
This unit consists of a variac controlled power supply to the primary (LV)
winding of the test transformer and a digital voltmeter for the HV divider output a
mA meter for the test current which flows through the HV winding.
Overcurrent Protective resistor
This resistor protects the tranformer winding from overcurrents when a short circuit
occurs in or across the test object by limiting the short circuit current to a safe value.
The resistor has a value of approx. 1 Mohm and rated for short duration overcurrents
( duration < 1 sec)
Supply and Measurement Cables
These are the cables of approx. 8 m length used for supplying the power to the
transformer’s primary winding and for the measurement of the load voltage and
load current .
Users Manual
This is supplied with the equipment
11
Appendix .1. Construction and Circuit Diagrams.
DIAGRAM OF THE 100 KV AC TEST SYSTEM
12
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YÜKSEK GERİLİM DARBE GENERATÖRÜ
GENEL KULLANMA TALİMATNAMESİ
HIZAL ELEKTROEROZYON SANAYİ ve TİCARET LTD
15
1. MONTAJ VE YERLEŞTİRME
Yüksek Gerilim darbe generatörü ve ölçme sistemi Şekil.1. deki gibi yerleştirilecek ve
bağlantıları yapılacaktır. Ölçme sisteminde gürültü ,girişim ve istenmeyen sinyalleri en az
düzeyde tutmak için gösterilen yerleştirme ve bağlantı düzenine dikkat edilmesi gereklidir.
Ayrıca gerek sistemin sağlıklı çalışması gerekse dışarıdaki diğer hassas cihazların
(bilgisayar vs.) korunması amacıyla Yüksek Gerilim Darbe Generatörü , zemininde iyi bir
toprak ağı bulunan ve
bir Faraday Kafesi
yapısına sahip bir laboratuvara
yerleştirilmelidir.
2. ÇALIŞTIRMA ve TEST GERİLİMİNİN AYARLANMASI
Yukarıda zikredilen tüm bağlantıların doğru yapıldığı kontrol edildikten
generatörün çalıştırılması için aşağıdaki sıra takip edilir.
sonra
,
a) El -Topraklama çubuğunu kaldırınız.
b) Kontrol panosu üzerindeki voltaj ayar düğmesini ( variak kolu ) minimuma
( en sola ) getiriniz ve ana güç şalterini ON a getiriniz.
c) Mains ON Butonuna basarak panoya güç veriniz. Osiloskop anahtarına basarak
çalışmasını sağlayınız ve Osiloskobu Single veya Normal moduna getiriniz..
d) HV ON Butonuna basarak yüksek gerilim yükleme sistemini çalıştırınız. Bu sistemin
çalışması için her defasında gerilim ayar düğmesinin ( variak kolu ) en solda bulunması
gerektiğini unutmayınız. Generatörün yeniden şarj edilebilmesi için READY ışığının
yanması gereklidir.
e) Generatörün sağlıklı ve kararlı çalışması küre aralıklarının doğru ayarlanmış
olmasına bağlıdır. Küreler tam kapalıyken en alt küre aralığı yaklaşık 0.5 mm diğer
küre aralıkları 1 mm olmalıdır.
f) Gerilim ayar düğmesini yavaşça sağa doğru çevirerek ( Increase Voltage ) generatör
kademelerini istenilen gerilime yükleyiniz. Osiloskobun ( RUN ) butonuna basarak sinyali
kayda hazır duruma getiriniz.
g) Bu durumda , FIRE Butonuna basarak generatörü ateşleyebilirsiniz.FIRE Butonu
üzerinde parmağınızı bir saniye kadar tutunuz ve bırakınız . Böylece generatör küre
aralıkları bir sonraki ateşleme için uygun pozisyonu otomatik olarak alacaktır.
h) Osiloskop , gerilim bölücüsünden gelen sinyali kaydettikten sonra
Osiloskobun
MEASURE kontrolü yardımıyla gerilimin büyüklüğü ölçülebilir veya hafızaya
kaydedilebilir .
3.GENERATÖRÜN KAPATILMASI
Generatör bir otomatik emniyet topraklama düzeni ve birde el - topraklama çubuğuna
sahiptir. Otomatik topraklama düzeni HV ON a basılmasıyla birlikte devreden çıkar ve
OFF a basılınca otomatik olarak kapanır .
Bu nedenle , Generatör yüklendikten sonra herhangi bir nedenle kapatılmak istenirse
hemen OFF a basılmamalı , KESİNLİKLE yükün ölçme direnci üzerinden yavaşça
boşalması beklenmeli veya generatör ateşlenerek boşaltılmalıdır.
HIZAL ELEKTROEROZYON SANAYİ ve TİCARET LTD
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Generatör kapasitörlerindeki gerilim az bir düzeye ( 3- 4 kV) indikten sonra OFF a
basılmalıdır. Aksi takdirde oldukça büyük olan generatör kapasitanslarındaki enerji şarj
dirençlerine ve otomatik topraklama sistemine zarar verebilir. Ayrıca kondansatörlerin
yüksek akımla çok ani boşalması da kondansatörlerin ömrünü azaltabilir.
j) Generatör kapatıldıktan ve otomatik topraklamanın çalıştığı ve voltmetredeki
gerilimin sıfıra düştüğü GÖZLE görüldükten sonra MUTLAKA El topraklama
çubuğu uygun yerine ( birinci kademe SOL küre çubuğuna ) yerleştirilmelidir.
Generatör kondansatörleri oldukça büyük olduğundan bunlarda kalacak az bir gerilim
dahi hayati tehlike oluşturabilir.
DARBE
GENERATÖRÜ ŞEMASI
HIZAL ELEKTROEROZYON SANAYİ ve TİCARET LTD
17
ŞEKİL.1. YÜKSEK GERİLİM DARBE GENERATÖRÜ
YERLEŞTİRME ve BAĞLANTI ŞEMASI
HIZAL ELEKTROEROZYON SANAYİ ve TİCARET LTD
18
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