‫المواصفات الفنية‬
‫لعملية شراء‬
‫عدد ( ‪ ) 273‬محول جهد‬
‫‪ 66‬ك‪.‬ف‬
‫لمحطات منطقة مصر‬
‫الوسطى‬
‫‪1‬‬
‫بيان بالمحطات واعداد المحوالت المطلوبة في كل محطة وجهد الثانوي ‪Table A‬‬
‫اسم المحطة‬
‫القطاع التابعة له العدد المطلوب‬
‫القطاع الشمالي‬
‫جهد الثانوي‬
‫‪6‬‬
‫‪√3/100‬‬
‫غرب ملوي‬
‫‪24‬‬
‫‪√3/100‬‬
‫المنيا شرق‬
‫‪24‬‬
‫‪√3/110‬‬
‫‪24‬‬
‫‪√3/110‬‬
‫مطاي‬
‫‪24‬‬
‫‪√3/110‬‬
‫مغاغة شرق‬
‫‪6‬‬
‫‪√3/110‬‬
‫ريفا‬
‫‪30‬‬
‫‪√3/100‬‬
‫البداري‬
‫‪6‬‬
‫‪√3/110‬‬
‫الغنايم‬
‫‪12‬‬
‫‪√3/100‬‬
‫‪24‬‬
‫‪√3/110‬‬
‫وادي الشيح‬
‫‪23‬‬
‫‪√3/110‬‬
‫اسيوط الجديدة‬
‫‪28‬‬
‫‪√3/110‬‬
‫بني رافع‬
‫‪24‬‬
‫‪√3/110‬‬
‫الخارجة‬
‫‪18‬‬
‫‪√3/110‬‬
‫الواسطى‬
‫المنيا‬
‫ديرمواس‬
‫اسيوط‬
‫والوادي الجديد‬
‫ساحل سليم‬
‫‪273‬‬
‫االجمالي‬
‫‪2‬‬
CONTENTS
Description Page
‫الشروط الخاصة‬---------------------------------------------------4
1-Scope--------------------------------------------------------5
2- Definitions -------------------------------------------------6
3- Classification ----------------------------------------------6
4- Requirements --------------------------------------------6
5- Marking----------------------------------------------------16
6- Testing and Inspection---------------------------------16
7- Sampling -------------------------------------------------19
8- Method of Test-------------------------------------------19
9- Acceptance And Rejection ----------------------------19
10- Delivery ---------------------------------------------------19
11- Guarantee ------------------------------------------------20
12- Submittals ------------------------------------------------20
13- Reference List---------------------------------------------21
14- Test schedules--------------------------------------------22
15- Tenderer Guarantee schedules ----------------------25
3
‫الشروط الخاصة‪-:‬‬
‫‪ -1‬صالحية العرض‪ :‬أربعة اشهر من تاريخ فتح المظاريف‬
‫‪ -2‬مدة التوريد‪ :‬أربعة أشهرمن تاريخ استالم امر التوريد‬
‫‪ -3‬طريقة الدفع ‪ %100 :‬بعد الفحص و االستالم المقبول فنيا بواسطة اللجنة المشكلة والتوريد بمخازن منطقة‬
‫كهرباء مصر الوسطى بالمنيا ‪.‬‬
‫‪ -4‬الضمان ‪ :‬يلزم المورد بضمان المهمات الموردة لمدة اربع سنوات من التوريد او ثالث سنوات من دخول‬
‫الخدمة وذلك بتقديم خطاب خاص بنكي غير مشروط يكون ساري طوال فترة الضمان‬
‫‪ -5‬مكان التسليم ‪ :‬بمخازن منطقة كهرباء مصر الوسطى (شوشة ‪ -‬سمالوط – المنيا)‬
‫‪-6‬تقديم مايفيد التسجيل بالفاتورة االلكترونية‬
‫‪ -7‬تقديم مايفيد التسجيل بضريبة القيمة المضافة وصورة البطاقة الضريبية والسجل التجاري‬
‫‪-8‬التامين االبتدايي ‪ :‬بقيمة مبلغ وقدره ( ‪ ) 375000‬سبعة وثالثون الف وخمسمائة جنيه مصري‬
‫‪-9‬التامين النهايي ‪ :‬يكون بنسبة ‪ % 5‬على العرض الراسي عليه العملية اويستكمل التامين االبتدايي ليصبح‬
‫نهايي اوتقديم خطاب بنكي غير مشروط‬
‫‪ -10‬االسعار ‪ :‬بالجنيه المصري‬
‫‪-12‬ثمن كراسة الشروط (‪ )13000‬ثالثة عشر االف جنيه مصري‬
‫‪ -13‬يلتزم المورد بان تكون ابعاد الطرف االبتدايي لمحول الجهد قطر ‪ 30‬مم وطول ‪90‬مم واذا كانت االبعاد‬
‫مختلفة عن هذه القيم يقوم المورد بتوريد وصلة بين الطرف االبتدايي لمحول الجهد وموصل الخط من‬
‫النوع‪ACSR 380/50 mm2‬‬
‫‪-14‬مكونات المعدات ذات منشأ أوروبي أو أمريكي أو ياباني او مصري بترخيص سارى من شركة اوروبية او‬
‫امريكية اويابانية‬
‫‪ -15‬توريد شهادات المنشأ وشهادات المعايرة وتوضيح الطراز والموديل‬
‫‪ -16‬تسري أحكام اليحة العقود والمشتريات الخاصة بالشركة المصرية لنقل الكهرباء على جميع المهمات التي‬
‫يتم توريدها واألعمال التي يتم تنفيذها‬
‫‪ -17‬يحق للشركة المصرية لنقل الكهرباء زيادة أو خفض الكميات المقبولة فنيا وماليا بما تقضي به أحكام‬
‫الاليحة الخاصة بالشركة المصرية لنقل الكهرباء (اليحة المشتريات) ‪.‬‬
‫‪ -18‬يحق للشركة المصرية لنقل الكهرباء تجزية أو قبول أو رفض أي عطاء بدون ابداء االسباب ‪.‬‬
‫‪4‬‬
‫‪ -19‬أي مخالفة في هذه الشروط سوف يتم تقييمها ماليا عند التحليل المالي لالسعار المقدمة بالعطاء‬
‫‪ -20‬تلتزم الشركة الصادرة لها أمر التوريد بأن يكون استخدامها للعمالة غير المنتظمة عن طريق مديرية‬
‫العمل المختصة‬
‫‪ -21‬تقدم الرسومات مع شهادات اختبار للمعدات من نفس الطرازات التي سيتم توريدها لالعتماد في موعد‬
‫أقصاه اسبوع من اخطار القبول‬
‫‪ -22‬تقديم الكتالوجات الفنية الخاصة بالمهمات مع العرض ‪.‬‬
‫‪-23‬االسعار بالعملة المحلية ( الجنيه المصري )‬
‫‪ -24‬تقديم صورة من اوامر التوريد لقطاع الكهرباء والجهات االخرى‬
‫‪ -25‬يتم تثبيت محول الجهد على قاعدة من الصلب المجلفن عرض ‪40‬سم * طول ‪45‬سم‬
‫‪ -26‬يقوم المورد بتقديم رسومات تفصيلية بابعاد المحول مع العرض‪.‬‬
‫‪ -27‬يقوم المورد بتقديم شهادات اختبارات ‪ type test‬مع العرض بتاريخ اليزيد عن ‪ 10‬سنوات عند تاريخ‬
‫التوريد‪.‬‬
‫‪ -28‬يلتزم المورد بتوريد دليل صيانة لكيفية معالجة تسريب الزيت في حالة حدوثه وبيان ضغط الزيت وكيفية‬
‫ملء وتفريغ الزيت لمحول الجهد ‪.‬‬
‫‪ -29‬ضرورة قيام الشركات المتناقصة بزيارة احد المواقع التي سيتم تركيب المهمات بها ومعاينتها معاينة نافية للجهالة قبل‬
‫تقديم العطاء‬
‫‪5‬‬
66KV CONVENTIONAL OUTDOOR VOLTAGE INDUCTIVE
TRANSFORMERS
1- SCOPE
1.1 This specification mainly covers the design parameters, manufacturing, factory
testing, inspection, delivery, commissioning and guarantee of 66 kV
Conventional Indoor or outdoor inductive voltage transformers.
2- DEFINITIONS
2.1 Inductive Voltage Transformer
Inductive voltage transformer is a single phase wound type. The
windings and terminal should be high conductivity copper or
copper alloy, as defined in IEC 61869-3
3- CLASSIFICATION
3.1 Inductive Type
It shall be single phase wound type, oil immersed in porcelain housing,
post type hermetically sealed, suitable for indoor or outdoor installation
under the environmental and system conditions defined in table 1.
6
Table (1) Standard Environmental Conditions
Description
1-
Value
Pressure mb-annual mean.
1013
2-
Atmospheric Temperature °C :Maximum mean daily
Minimum mean daily
Yearly mean
55
-5
35
3-
Relative humidity %
Maximum relative humidity
Minimum relative humidity
Average relative humidity
Daily mean
100
20
75
95
4-
5-
6789-
Rain fall mean-annual total (mm)
Maximum wind speed
above ground level.
(m/sec.)
at
10m
35
Soil temperature at a depth of 1.5 m.
25°C
Solar energy radiation W/m²
>1100
Wind pressure N/m²
766
Absolute black bulb °C max. recorded
Description
10-
65
75.7
Value
Thunder storms
Occasional
7
1112-
Sand storms
Occur occasionally
specially in desert.
Pollution
Heavy pollution >50
μS
Seismic load
According to
Egyptian Code and
attached map.
13-
Note : This table is valid altitude (0-1000m)
.
4- REQUIREMENTS
4.1
Environmental Conditions
4.1.1 The environmental conditions
shall apply.
listed
4.2 System Parameters.
The system parameters listed in table 2 shall apply.
8
in
table
1
Table (2) 66 kV System Parameters
Item
Parameter
unit
Value
Hz
50
1-
Frequency
2-
Configuration
3phase
3-
Neutral arrangement
Solidly
earthed
4-
Service system voltage
KV r.m.s
Rated system voltage for equipment
kV r.m.s
56-
Duration of max. temporary over voltage.
7-
Rated short-time withstand current.
8-
Rated duration of short circuit
9-
Rated peak withstand current.
1011-
Sec.
KA r.m.s
sec
66
72.5
1
40
1
KA
100
Lightning impulse withstand voltage
1.2/50 μs (LIWL)
kVpeak
325
One minute power frequency withstand
voltage
KA r.m.s
9
140
Item
12
Parameter
unit
Value
Min. specific leakage path service
voltage For equipment :
cm/kV
outdoor
indoor
13
3.5
2.5
Allowable Minimum Clearance (mm)
For the receiving steel structure
Between live conductors and earthed parts
mm
- Between phases in air
mm
For the equipment (indoor/outdoor)
- Between live conductors and
earthed parts
mm
- Between phases in air
mm
10
900
1120
800/900
800/1120
4.3 Quality Assurance
4.3.1 All voltage transformers and coupling capacitor devices
provided under this specification shall conform to the latest
edition of the applicable codes and standards of:EUS – Electricity Utility Specifications
IEC – International Electro technical Commission.
• IEC 60060-2 HV test techniques.
• IEC 61869-3 Inductive voltage transformers.
• IEC 61869-5 Capacitive voltage transformers.
• IEC 60233- tests on hollow insulators for use in electrical equipment.
• IEC 60269 – low voltage fuses.
• IEC 60270 – partial discharge measurements.
• IEC 60296 – insulating oil.
• IEC 60507 – artificial pollution tests on high voltage insulators.
• IEC 60529 – classification of degrees of protection provided
by enclosures.
BSI- British Standards Institution
• BS 4870 – welding procedures approval testing.
4.3.2 Alternative codes and standards
The supplier may propose alternative codes and standards
provided it is demonstrated that they give an equivalent degree of
quality as the referenced codes and standards. Acceptability of
any alternative code or standard at the discretion of the
purchaser.
11
4.3.3 Precedence of Codes and Standards.
In cases of conflict between this specification and any of the
referenced
codes and standards, the following order of
precedence shall apply:
- This specification.
- EUS specification.
- IEC recommendations and publications.
- Other referenced codes and standards.
- Acceptable alternative codes and standards.
4.4 Design
4.4.1 Voltage Transformer Inductive Type
The transformers have their winding wound on a magnetic core.
The primary winding is carried to the head through a capacitive
bushing.
The active parts are placed inside tank filled with oil up to the top
of the bushing .
The compensation of the oil volume variations is carried out by
means of stainless steel bellow placed in the upper part of the
head, also provided with oil level indicator, pressure relief and
oil sampling valve. The transformers are hermetically sealed.
12
4.4.2
Inductive
voltage
transformer
burdens, accuracy classes and voltage factors.
rated
Description
Type
Standard
Unit
Rated primary voltage
kV
No. of secondary core
transformation
Value
Inductive – Outdoor
IEC 61869-3
66 / √3
2
Rated secondary voltage
V
Core 1
100 / √3
Or 110 / √3
Core 2
100 / √3
Or 110 / √3
According Table A
Application
- Accuracy class
Rated burden
Simultaneous burdens
Rated voltage factorContinu
Continuous
VA
VA
Secondary terminal
Secondary terminal box degree of protection
Insulation level voltage
Oil level indicator
Gasket/O rings
Insulation
According Table A
Measurement
0.5
>100
>150
Protection
3P
>50
1.2
1.9
30 sec
Max. dielectric dissipation factor at Um/√3
Max partial discharge test voltage
@ 1.2Um
@ 1.2Um/√3
Secondary insulation with stand voltage to ground
& between windings for 1 minute
Ambient air temperature category
Average Ambient air temperature(24h)
Limit of Temperature rise of winding
Insulation type / color
Material of ( winding / terminal )
Altitude
Insulation material
Insulating oil
ratios,
%
Pc
>
>
>0.5
KV
3
o
C
o
C
o
C
10
5
-25/+50
35
55
Porcelain / brown or silicon rubber
Copper or copper alloy
m
<1000
Oil / paper
According to latest edition IEC60296
Stud type or spring loaded contact similar to clip on
(weidmueller) terminal RSE type
IP54
KV
72.5/140/325
Oil site window (prismatic type)
Nitrile / butyl rubber NBR/Viton shall be used
No CORK gaskets shall be used
Class A or higher
13
4.4.3 Inductive voltage transformer transient response requirements.
Inductive voltage transformer shall be dimensioned for rapid
response to changes in primary voltages as specified by IEC
61869-5. Where special response characteristics are required in
conjunction with the use of high speed solid state relays
4.4.4 Protection of inductive voltage transformer secondary windings.
Each secondary winding shall be protected by M.C.B to be
accommodated in the secondary terminal box
The recommended M.C.B type shall be provided with two normally open / closed
contacts to initiate an alarm in the control room and initiate fuse fail in distance
relay and size shall be stated in the tender. The MCB should be connected to the
secondary terminals of the voltage transformer
The VT shall be so designed to avoid ferro – resonance effects.
4.4.5 Porcelain Housing
The insulator unit or units shall be of made of commercial grade
wet process porcelain, brown glazed over its entire visible
surface, which shall be relatively free from imperfections. It shall
be designed to withstand the static and dynamic stresses imposed
by rated voltage, short circuit current, conductor pull, and other
loads imposed by the environmental conditions in table1. The
load resulting from wind pressure will be 765N/m² .
The voltage transformer should have test tap for testing tan delta
and dissipation factor.
The supplier shall, if required furnish evidence of the integrity of
the porcelain housing, such as test certificates for electrical
routine test, porosity test and temperature cycle test in
accordance with IEC 60233 and IEC 62155ED-1-0.
14
4.4.6 Terminal Boxes
Terminal boxes shall be weatherproof, protected against the entry
of insects and ventilated to prevent condensation to the level of
IP54, the bottom plate of the box shall be furnished undrilled,
but sufficiently large to accommodate three cable glands of up to
40mm external diameter.
4.4.7 H.V. Terminals
H.V. terminal shall be of heavy tinned electrolytic grade copper
and shall be standard size (30mm diameter * 90mm long )
If H.V. terminal does not have this dimension (30mm diameter * 90mm long ) the
bidder must provide compression joint terminal connector suitable to connect his VT
H.V terminal to ACSR conductor of 380/50mm2
HV terminal shall be design to withstand the electrical and
mechanical stresses due to rated voltage short circuit current
(40KA for 1 sec) and mechanical forces. The rated mechanical
load, in any direction, shall be 1.25KN for static load and
the dynamic load shall be 1.4 times the static load
4.4.8 Earthing
The low voltage end of the inductive units divider shall be
terminated in a bushing insulation from the metal base. An
external earthing stud capable of accepting twin lugged copper
conductors of 150mm² cross-sectional area, connected to the
metal base shall be provided on all units. inductive voltage
transformers shall have an earthing terminal provided within the
secondary terminal box for earthing the secondary windings
and cable screens.
15
4.4.9 Galvanizing and Welding
All exposed ferrous parts shall be hot dip galvanized.
Tenderer shall clearly state the corrosion protection applied to
aluminium and aluminium alloy parts.
Welding, where necessary, shall be carried out using procedures
approved as specified in BS 4870 or equivalent specification.
4.4.10 Mounting Arrangements
Capacitive/inductive voltage transformers will be mounted on a
free standing structure
5- MARKING
The rating plate for inductive voltage transformers shall be in
accordance with IEC 61869-2. A plate with easily legible data of
the transformer and marking of the winding should be provided.
In addition the order number and the year of manufacture shall
be marked in English on all units. All rating plates shall be made
of stainless steel.
6- TESTING AND INSPECTION
6.1 Testing
6.1.1 General
All inductive voltage transformers shall be tested in accordance
with the latest edition of the referenced standards and as
specified herein. Following completion of the tests, two certified
copies of the test reports shall be submitted to the purchaser for
approval. No inductive voltage transformers devices shall be
shipped until the test reports have been approved by the
purchaser.
The purchaser at his discretion may waive type test requirements
where type test have previously been carried out and where
acceptable type test certificates shall be based on the stated
requirements for type testing contained in this specification.
16
6.1.2 Validity of Test Certificates
Test certificates are considered valid if the test have been carried out within the last ten
years on equipment identical to that on offer using test methods outlined in this
specification .
6.1.3 Location of Tests
Routine test shall be carried out at the supplier’s factory. Type tests
shall be carried out at an approved independent testing laboratory and
be witnessed by a representative of an approved independent test
laboratory or other representative acceptable to the purchaser.
6.2 Inspection
The purchaser has the right to witness tests or visit the factory
during manufacture of any or all items covered by this
specification. Accordingly, the supplier shall give the purchaser
adequate notice of manufacturing and test schedules.
6.3 Type Tests
6.3.1 Type tests shall be carried out in accordance with IEC 61869-5
and 61869- 3 for inductive voltage transformers.
6.3.2 Type tests shall be supported by a test certificate, giving the
type, description, location and date of the tests carried out by an
approved
independent testing laboratory or witnessed by the
representative of an approved independent testing laboratory.
17
6.3.3 The type tests required inductive voltage transformer are :6.3.3.1 Temperature Rise Test
6.3.3.2 Lightning And Chopped Impulse Tests
6.3.3.3 Short – Circuit Withstand Capability Test
6.3.3.4 Wet Test For Outdoor Transformer
6.3.3.5 Test for Accuracy
6.3.3.6 Special measurement of transmission factor for high frequency of
over voltage.
6.3.3.7 Determination of temperature coefficient .
6.3.3.8 Measurement of capacitance and dielectric dissipation factor (tan δ ). .
6.3.3.9 Tightness test
6.3.3.10 electromagnetic compellability test
6.4 Routine Tests
Routine tests shall be carried out in accordance with IEC 61869-5
for inductive voltage transformers.
6.4.1 The required routine tests are:6.4.1.1 Verification of Terminal Markings
6.4.1.2 Power Frequency Withstand Tests
6.4.1.3 Partial Discharge Measurement.
6.4.1.5 Sealing Test
6.4.1.6 Tests for Accuracy
6.4.1.7 Visual Inspection
6.4.1.8 Ferro resonance Check
6.4.1.8 Test (hollow insulator)
6.4.1.9
polarity test
6.5. special test :
a- Chopped lighting impulse
b- mechanical tests
c- multiple chopped impulse
d- over voltage transferred to secondaries
e- internal ARC test
18
7- SAMPLING
7.1 Type test shall be carried out on one of each type of unit offered.
7.2
Routine
tests
shall
be
carried
out
on
all
units
ordered.
8- METHOD OF TEST
8.1 All tests shall be carried out in accordance with IEC 61869-5,
IEC 60358, IEC 61869-3 and other IEC recommendations referred to
therein , unless otherwise indicated.
9- ACCEPTANCE AND REJECTION
9.1 The supplier shall forward to the purchaser, two copies of
certificates proving that all tests required have been carried out.
9.2 Acceptance or rejection of the units will be based on the criteria
specified in IEC 61869-5 and IEC 60358, IEC 61869-3 and as
indicated in the attached test schedules.
10- DELIVERY
10.1 Packing and Shipment
Each unit shall be packed in a strong non-returnable case to
protect it against corrosion, dampers and breakages.
The sides and top of each case shall be marked clearly with the
supplier’s name, purchaser’s order number, item number, case
serial number and gross weight and shall be accompanied by a
detailed packing note in Arabic and English.
19
10.2 Delivery
10.2.1 The tender shall include a guaranteed delivery time from
the date of receipt of the official order.
10.2.2 Equipment supplied from local shall be delivered to designated
stores.
11- GUARANTEE
11.1
The
supplier
guarantee
the
delivered
equipment
against manufacturing, design and material defects for a period
as given in the tender documents.
12- SUBMITTALS
12.1 Submittals Required with Tender:
Submittals required with tender are three copies each of :12.1.1 Fully completed copy of tender schedules.
12.1.2 Fully detailed type test reports.
12.1.3 Outline dimensioned drawings of complete
including drilling details of mounting flange for line traps.
equipment
12.1.4 Drawings showing arrangements for ratio connection,
secondary terminal boxes, oil expansion devices, porcelains, etc.
12.1.5 Erection and commissioning instructions.
12.1.6 Details of routine test to which all units will be submitted before
dispatch.
20
12.1.7 If applicable, a statement describing in detail how the units
offered are not in compliance with the requirement of the
specification.
12.1.8 The supplier’s quality assurance program and/or manual together
with list of international/national standards and specifications
covering raw materials, components, processes, tolerance, test
procedures, and a list of test normally carried out on raw
materials, with a description of test equipment.
12.1.9 Any further information necessary to fully describe the offer.
12.2 Submittals Required Following Award of Contract
Submittals required following award of contract are three copies each of :-
12.2.1 Guaranteed rated values and characteristics.
12.2.2 Detailed physical and electrical drawings.
12.2.3 Detailed erection, operation and maintenance instructions
in Arabic and English.
12.2.4 Summary of type tests and routine tests, with copies of
the test certificates.
12.2.5 Transportation / delivery proposals.
13. REFERENCE LIST
14.1 Tenderer shall submit a reference list that the proposed
equipment have been in successful operation in an integrated system on
three different substations of same or higher capacity outside country
of manufacturer and/or in EEHC network for a period not less
than three years during the last ten years. The experience of
manufacturer and the sub-manufacturer shall be evaluated on the above
basis.
21
TEST SCHEDULES
Test Schedules
66 kV Indoor/Outdoor Inductive Voltage Transformers
Type Test According to IEC 61869-3
Test
Conditions for Acceptance
Temperature rise test
Temp. rise not greater than
value in IEC 61869-3
Impulse voltage test
No breakdown
appropriate
Short – circuit withstand No visible damage.
capability.
Performance not impaired.
Test for accuracy
As IEC 61869-3
Errors do not exceed those listed in table
V, clause 22 or table IV, clause 28 for
accuracy class specified.
Test Schedules
66 kV Indoor/Outdoor Inductive Voltage Transformers
Type Test According to IEC 60358, IEC 61869-3
Test
High
tests
Conditions for Acceptance
frequency Measured capacitance equal to rated capacitance
(-20% or 50%). Equivalent series resistance not
greater than 40 ohms. Stray capacitance not greater
than 200 pF. Stray conductance not greater than 20
us.
22
Test
Conditions for Acceptance
Determination of temp. co efficient
Measured value not greater
than specified value.
Measurement of capacitance and dielectric
description factor
Tan δ < 0.5%.
Mechanical test
No evidence of damage.
Wet test for outdoor transformer No breakdown.
Test Schedules
66 kV Indoor/Outdoor Inductive Voltage Transformers
Type Test According to IEC 600507, IEC 60233
Test
Conditions for Acceptance
Artificial
pollution testsolid layer
method.
No flashover occurs during three consecutive Applications of
the test voltage for the various reference layer conductivities
in clause 13.2. If only one flashover occurs, a fourth test
shall be performed and the insulator passes the test if no
flashover occurs.
Porosity test
(insulator)
Absence of porosity.
Temperature
cycle test
(insulator)
No deterioration in electrical and mechanical properties.
Verification of
dimensions
(insulator)
Dimensions as specified..
23
Test Schedules
66 kV Indoor/Outdoor Inductive Voltage Transformers
Routine Test According to IEC 61869-3, IEC 60358, IEC 60233
Test
Conditions for
Acceptance
Verification of terminal markings
Markings as specified.
Power frequency tests and partial
measurement.
discharge
No breakdown
Sealing test
No leakage.
Capacitance and tan δ
Values as specified in
IEC.
Test for accuracy
As specified in IEC
61869-3.
Visual inspection
(insulator)
No
cracks
damage.
Electrical routine test (insulator).
No puncture.
Ferroresonance checks
24
or
TENDERER GUARANTEE SCHEDULES
GUARANTEE TABLES
66 KV POTENTIAL TRANSFORMERS
Ref Description Unit Offered
1- Maker’s name ----------2- Type ----------3- Standard specification ----------4- Service voltage at site KV ----------5- Highest system voltage KV ----------6- Rated frequency HZ ----------7- Winding material ----------8- Rated voltage (UN): ----------- - Primary. KV ----------- Measuring winding V
- protection winding. V ----------9- Rated burden at ambient temp. 45°C for ----------- Measuring windingVA
- protection.winding VA ----------10- Accuracy class for:
a. Measuring ----------b. Protection ----------11- Short circuit strength: 1 sec. KA ----------- 3 sec. KA ----------12- Phase errors: ----------a- 25% and 100% of rated burden at 80% to 120% of rated voltage
(measuring core) min ----------- to 150% of rated voltage(protection
core). min ----------b- 25% and 100% of rated burden at 2%
13- Power frequency withstand voltage KV ----------14- Partial discharge PC ----------25
15- Rated voltage factor ----------- - Continuous ----------- - 30 sec. ------16- Impulse test voltage with wave 1.2/50 micro sec. KV ----------17- Leakage path. cm/kv ----------18- Capacitance PF ----------19- Dielectric dissipation factor (tan δ) at 20°
……….. %
20- Maximum temperature rise.……..°C
21- Approximate weight …………..Kg
22- Height………. mm
23- Grade of filling oil ………
24- pressure of oil ………
25- type of oil ………
26- gasket martial type…….………
27- dimension of HV terminal…………….
28- bellow make and material and size……………
I/We guarantee the information given above for the equipment offered.
Signature: ---------------------------- Date : ---------------------------
26
27
‫التوقيع‬
‫اعضاء لجنة وضع الشروط والمواصفات الفنية ‪:‬‬
‫‪ -1‬مهندس ‪ /‬محمد خليفة عبدالمجيد‬
‫‪ -2‬مهندس‪ /‬محمد حسني امين‬
‫‪ -3‬االستاذ ‪ /‬احمد كامل عبدالسميع‬
‫‪ -4‬المحاسب ‪ /‬تيسير محي الدين طه‬
‫رئيس اللجنة‬
‫مهندس‪/‬‬
‫طارق عبدالفتاح عمر‬
‫‪28‬‬