December 25, 2016
December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
TRANSMISSION MATERIALS STANDARD SPECIFICATION
35-TMSS-01, Rev. 01
TABLE OF CONTENTS
1.0
SCOPE
2.0
CROSS REFERENCES
3.0
APPLICABLE CODES AND STANDARDS
4.0
DESIGN AND CONSTRUCTION REQUIREMENTS
4.1
4.2
4.3
4.4
General
Performance Characteristics and Ratings
Construction
Nameplate
5.0
TESTS
6.0
DATA SSCHEDULE
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 2 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
1.0
35-TMSS-01, Rev. 01
SCOPE
This Transmission Material Standard Specification (TMSS) specifies the minimum technical
requirements for design, engineering, manufacture, inspection, testing and performance of
Metal Oxide Surge Arresters for 11kV through 380kV system voltages, intended to be used
in the system of National Grid SA. This standard is not applicable for GIS surge arrester and
arresters provided in link box.
2.0
CROSS REFERENCES
This Transmission Material Standard Specification shall be read in conjunction with the
latest revision of National Grid SA General Specification No. 01-TMSS-01, titled "General
Requirements for All Equipment/Materials", which shall be considered as an integral part of
this TMSS.
This TMSS shall also be read in conjunction with National Grid SA Purchase Order or
Contract Schedules for project, as applicable.
3.0
APPLICABLE CODES AND STANDARDS
The latest revisions of the following Codes and Standards shall be applicable for the
equipment/material covered in this TMSS. In case of conflict, the vendor/manufacturer may
propose equipment/material conforming to one group of Industry Codes and Standards
quoted hereunder without jeopardizing the requirements of this TMSS
4.0
3.1
IEC 60099-4 Surge Arresters-Part 4 : Metal-Oxide Surge Arresters without gaps
for a.c system
3.2
IEC 60099-5 Surge Arresters-Part 5 : Selection and Application Recommendations
3.3
IEC 62155
Hollow pressurized and unpressurized ceramic and glass insulators for
use in electrical equipment with rated voltages greater than 1000 V
DESIGN AND CONSTRUCTION REQUIREMENTS
The analysis of a power system subject to temporary over-voltage, lightning over-voltage, or
switching over-voltage at a transmission line structure requires specific data on the following
parameters.
4.1
General
The surge arrester shall be of metal oxide, gapless type for outdoor / indoor service,
as specified in Data Schedule.
4.2
Performance Characteristics and Ratings
Ratings and requirements of surge arrester shall be as specified in Data Schedule
4.2.1
The nominal discharge current for surge arresters shall not be less than 10kA
4.2.2
The ratings of the surge arrester shall be as specified in Table-1
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 3 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
Table - 1
Effectively
Grounded System
(kVrms)
(kVrms)
Nominal
System
voltage
11
13.8
33
34.5
69
110
115
132
230
380
4.2.3
10
12
30
30
60
96
108
120
192
360
8.4
10
24
24
48
76
84
92
152
265
35-TMSS-01, Rev. 01
Non-Effectively
Grounded System
Arrester
Arreter
Rating
MCOV
(kVrms)
(kVrms)
12
10.2
15
12.7
36
29
39
31.5
72
57
120
98
132
106
Minimum acceptable single impulse energy capability in kj/kV of surge
arrester rating shall be as specified in Table-2.
Table - 2
Rating
(kV rms)
4.2.4
4.3
Minimum Energy
Absorption Capability
(kJ/kV of Arrester Rating)
for single impulse
Arrester class
per Table 1 of
IEC 60099-4
3-48
4
SL
54-245
7.2
SM
360
10
SH
Minimum external insulation withstand levels of the surge arrester housing
shall be as specified in IEC 60099-4.
Construction
4.3.1
35TMSS01R01/KSB
General
a.
The surge arresters shall be of pedestal type , self-supporting and fitted with
insulating bases.
b.
The surge arrester base shall be insulated from ground for 5kVminimum
for outdoor surge arresters.
c.
The arrester shall not be used as a bus support device.
d.
Outdoor surge arresters shall be capable of withstanding a washing
pressure of up to 3500kpa without penetration of water into the surge
arrester. The manufacturer shall furnish evidence of withstanding this
pressurized water washing pressure.
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 4 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.3.2
35-TMSS-01, Rev. 01
Insulator Housing
Insulator housings shall be made of Silicone Rubber or electrical grade wetprocessed porcelain up to 380kV.. The manufacturer, if required, shall furnish
evidence regarding integrity of the porcelain housings in accordance with IEC62155 or equivalent.
4.3.3
4.3.4
4.3.5
Pressure Relief Device
a.
When an arrester is fitted with a pressure-relief device, the failure of the
arrester shall not cause explosive shattering of the housing.
b.
The pressure relief device shall be capable of withstanding the symmetrical
fault current of the system as specified in Data Schedule or whichever is
higher.
c.
The pressure relief device shall be designed to ensure safety to operating
personnel and other apparatus in the vicinity, in case of the operation of the
pressure relief device.
Mounting Arrangement
a.
The surge arrester shall be suitable for base mounting with adopter plate in
a vertical position. The arrester base or end casting shall be furnished with
at least three mounting holes at 120 degrees on a 254 mm or 420mm
diameter bolt circle. The mounting holes shall accommodate either 13mm
or 19mm bolt with flat and lock washers. Surge arresters for the 13.8kV
and 34.5kV system shall be bracket mounted, if specified. Structure is to be
designed for wind load of 2kN per square meter on the arrestor and steel
structure.
b.
Arrester shall never be mounted on pipe carrying oil.
Fittings
All exposed ferrous parts shall be hot-dip galvanized in accordance with 01-TMSS-01.
4.3.6
Terminals
The surge arrester line terminal shall be of 4-hole terminal pad2 with NEMA
Standard drilling, suitable for line conductor of sizes up to 240mm .The terminal
pad shall be an integral part of the arrester head. The terminal pad
shall be corrosion resistant.
4.3.7
35TMSS01R01/KSB
Accessories
a.
230kV and 380kV arresters shall be equipped with grading rings.
b.
Surge arresters for system voltages of 69kV and above shall have a surge
(discharge) counter along with a built-in milli ammeter to monitor the
leakage/internal current of the surge arrester continuously.
c.
The surge counter shall record the number of lightning and switching
discharges of the surge arrester automatically on a five-digit cyclometer dial.
The surge counter shall be non- resettable and capable of registering up to 5
discharges per second.
d.
The leakage and internal current indicator shall monitor and measure the
sum of leakage current across the external porcelain insulator plus the
internal current flowing through the surge arrester. The scale range shall be
0-50 mA Peak /√2 (nonlinear scale).
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 5 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
e.
35-TMSS-01, Rev. 01
The surge counter and leakage/internal current indicator unit shall be
maintenance free, weatherproof sealed type.
Insulated cable connection shall be provided between surge arrester
ground terminal and surge monitor. The insulation withstand of the
cable shall be 5kV minimum. By pass shunt shall be provided to
establish continuity to ground from the surge arrester ground terminal
for ease in maintenance. It is mandatory for the manufacturer to
provide this cable.
.
4.3.8
Grounding
Each surge arrester shall be provided with one grounding pad, sized to
accommodate connectors suitable for stranded copper conductor of sizes up
to 70mm2. The connection between surge arrester and discharge counter/
leakage current indicator shall be made with 70mm2 insulated stranded
copper conductor. Whereas the connection from leakage indicator to
grounding grid shall be made with 2*240mm2 bare stranded copper
conductor.
4.3.9
Pressure relief device
The arrester should have the capability to withstand internal fault currents
after a failure without violent shattering of the housing Therefore the fault
current withstand of the arrester should be equal to or greater than the
maximum fault current through the arrester at the installation point of the
arrester in case the arrester equipped with pressure relief device.
4.3.10 Pollution withstand characteristics
The pollution withstand capability of the arrester concerns three aspects:
a.
The arrester housing should withstand the pollution stresses without
flashover according to IEC 60507.
b.
The arrester should withstand the possible temperature increase due to
the changes in voltage distribution caused by the pollution activity on
the surface of the housing. Consideration should be given to the
pollution level and the frequency and amplitude of over voltages
caused by faults and reclosing operations during polluted conditions.
c.
The arrester should withstand internal partial discharges, caused by
disturbed voltage grading on the housing due to pollution, without
damage to the varistors or to the internal mounting elements.
4.3.11 Live washing characteristics
When live washing of the arrester is foreseen, assurance is required that the
arrester housing will not flash over and that the temperature increase of the
varistors remains within the specified maximum temperature. Suitable test
procedures have to be defined.
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 6 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.4
35-TMSS-01, Rev. 01
Nameplate
4.4.1
Each surge arrester shall bear a nameplate permanently and legibly marked in
English with the information listed per IEC 60099-4 or as applicable and the
following additional information:
a. The words “ ” kV Surge Arresters
b. National Grid SA Purchase Order Number/Contract Number/J.O.
Number.
c. 35-TMSS-01, Rev.01
4.4.2
5.0
The nameplate material shall be of anti-corrosion material and shall be
fastened to surge arrester by stainless steel screws or rivets. The marking
shall be engraved.
Type (Design) Tests
All type tests prescribed in the latest revision IEC 60099-4 standard shall be performed on
the representative unit or on the first unit of every new design or rating to be supplied to
National Grid SA.
In lieu of the actual type tests, certified test reports of type (design) tests performed on an
identical unit may be submitted to National Grid SA for review and approval during bidding
stage.
All test results shall be provided for review and acceptance by National Grid SA. Tests will
be accordingly but not limited to the following:
5.1
Type Test
1-
Insulation withstand tests on the arrester housing comprising
a. Lightning Impulse test
b. Switching Impulse test
c. Power frequency withstand test.
2-
Residual voltage test
a)
Steep current impulse residual voltage test
b)
Lightning impulse residual voltage test
c)
Switching impulse residual voltage test
3-
Test to verify Long term stability under continuous operating voltage.
4.
5.
6.
7.
8.
9.
10.
11.
Repetitive Charge transfer withstand test
Heat dissipation behavior verification of test sample
Operating duty test.
Power frequency voltage versus time
Short circuit tests.
Bending moment.
Environmental tests
Seal Leak rate
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 7 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
5.2
35-TMSS-01, Rev. 01
12.
Radio interference voltage (RIV)
13.
Test to verify the dielectric withstand of internal components
14.
Test on internal grading components
Routine (Production) Tests
All routine tests prescribed in the latest revision IEC 60099-4 shall be performed on all
surge arresters
5.3
Type, Special and Routine Tests for Polymer Insulator
Tests per IEC 60099-4 shall be performed.
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 8 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
6.0
35-TMSS-01, Rev. 01
DATA SCHEDULE
SURGE ARRESTER FROM 11kV THROUGH 380kV NOMINAL
National Grid SA
Enquiry No.
Date:
National Grid SA
Purchase Order No.or
Contract No
Date:
National Grid SA PTS No./Project Title
with J.O. No.
REFERENCE
SECTION NO.
DESCRIPTION
'A'
'B'
'C'
SYSTEM DATA
Nominal System Voltage(kV)
(11kV, 13.8kV, 33Kv, 34.5kV, 69kV,
110kV, 115kV, 132kV, 230kV or 380kV)
*
System Fault Current Level at
Rated System Voltage (kA)
*
Maximum Duration of Ground Fault (ms)
*
System Neutral Grounding at Arrester Point
Of Installation (Effectively, Non-Effectively
Grounded)
'A'- NATIONAL GRID SA SPECIFIED DATA/PARAMETER.
'B'- BIDDER/SUPPLIER/VENDOR/CONTRACTOR PROPOSED DATA/PARAMETERS.
'C'- REMARKS SUPPORTING THE PROPOSED DEVIATION IN COLUMN 'B'.
(*)- DATA/PARAMETER TO BE PROVIDED/PROPOSED BY THE BIDDER/SUPPLIER/
VENDOR/CONTRACTOR IN COLUMN 'B'.
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 9 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
6.0
35-TMSS-01, Rev. 01
DATA SCHEDULE
SURGE ARRESTER FROM 11kV THROUGH 380kV NOMINAL
REFERENCE
SECTION NO.
DESCRIPTION
'A'
'B'
'C'
System Component(s) to be protected
Transmission Line
Surge Impedance (ohms)
Length (kM)
*
*
Underground Cable
Capacitance (µF/kM)
Length (kM)
*
*
Capacitor Banks
Capacitance (MVAR)
Others
(Power Transformers, Reactors, GIS etc.,
attach details)
*
3.0
APPLICABLE INDUSTRY STANDARDS
*
4.0
DESIGN AND CONSTRUCTION REQUIREMENTS
4.1
General
Type
Model Designation
Location (Indoor/Outdoor)
4.2
*
*
Performance Characteristics and Ratings
Rated Voltage
Arrester Class
*
Dielectric Withstand for Housing
Lightning impulse sithstand voltage,
with 1.2/50µs waveform (kVpeak)
*
Power frequency withstand voltage(Wet for
outdoor/ Dry for indoor)
*
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 10 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
6.0
35-TMSS-01, Rev. 01
DATA SCHEDULE
SURGE ARRESTER FROM 11kV THROUGH 380kV NOMINAL
REFERENCE
SECTION NO.
DESCRIPTION
Switching impulse withstand voltage
With 250/2500µs waveform (for arrester
with rated voltage 200kV and above (kVpeak)
'A'
'B'
'C'
*
Nominal Discharge Current (Lightning Impulse
Classyifying Current) with 8/20 µs waveform (kV) *
High Current impulse Capability with 4/10µs
Waveform (kApeak)
*
Maximum Lightning Impulse Residual Voltage
With 8/20 µs waveform (kVpeak) at a Discharge
classifying) current of :
- 5kA
- 10kA
- 20kA
- 40kA
*
*
*
*
Maximum Switching Surge Residual Voltage
(kVpeak) at Discharge Current of
- 0.5kA
- 1kA
- 2kA
*
*
*
Maximum Steep Current /Front-of-Wave
Residual Voltage Based on 1/ 2 or 0.5 µs
Waveform as Applicable (kVpeak)
- 10kA
*
-
*
20kA
Temporary over voltage capability (kVrms)
(manufacturer shall submit curve for TOV for the
Following duration with and without Prior duty)
- 0.1second
- 1 second
- 10 second
100second
*
*
*
*
Maximum R.I.V (µv)
*
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 11 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
6.0
35-TMSS-01, Rev. 01
DATA SCHEDULE
SURGE ARRESTER FROM 11kV THROUGH 380kV NOMINAL
REFERENCE
SECTION NO.
DESCRIPTION
'A'
Maximum External Insulation Levels
Power Frequency Dry Withstand Voltage (kVrms) *
4.3
Power frequency wet withstand voltage (kVrms)
*
Lightning impulse withstand voltage (kVpeak)
*
Switching impulse withstand voltage (kVpeak)
*
Leakage current through Arrester at MCOV (mA)
*
Maximum Energy Absorption Capability
i) kj/kV of arrester rating
ii) kj/kv of MCOV
*
*
Repetitive Charge Transfer rating (Qrs(C))
*
Maximum resistive current acceptable
*
'B'
'C'
Construction
Pressure Relief Capability (rms symmetrical)
High Current Short duration
Low current, long duration (A)
600
Porcelain Housing
Color
Creepage Distance (mm)
Bending Failing Load (kN)
Cantilever Strength min (kN)
Torsional Strength (kN)
Compression Strength (kNm)
No. of Stacks in each unit
Height (mm)
*
*
*
*
*
*
*
*
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 12 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
6.0
35-TMSS-01, Rev. 01
DATA SCHEDULE
SURGE ARRESTER FROM 11kV THROUGH 380kV NOMINAL
REFERENCE
SECTION NO.
DESCRIPTION
Internal Pressure Required to Operate
Pressure relief device as a Percent of
Pressure required to Burst Porcelain (%)
'A'
'B'
'C'
*
Mounting arrangement
Mode of mounting (self-supporting/bracket
Bracket supporting)
Bolt circle diameter (mm)
No. of holes
Size of Bolts (mm)
*
*
*
*
Accessories
Scale range of leakage ammeter(mA)
*
Diameter of the grading ring if applicable (mm)
*
Material of grading ring if applicable
*
Terminals
Type
Size (mm)
Material (Al or CU)
Pad
*
*
Grounding
Size (mm)
Material
*
*
MISCELLANEOUS
Minimum clearance between live parts
and earth parts (mm)
*
Minimum Permissible Center to Center
Distance between Arresters (mm)
*
Overall Height of arrester (mm)
*
Weight of arrester (kg)
*
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 13 OF 14
TRANSMISSION MATERIALS STANDARD SPECIFICATION
6.0
35-TMSS-01, Rev. 01
DATA SCHEDULE
SURGE ARRESTER FROM 11kV THROUGH 380kV NOMINAL
A.
ADDITIONAL TECHNICAL INFORMATION OR FEATURES TO BE FURNISHED BY
NATIONAL GRID,SA:
B.
ADDITIONAL SUPPLEMENTARY DATA OR
BIDDER/VENDOR/SUPPLIER/CONTRACTOR:
C.
OTHER PARTICULARS TO BE FILLED UP BY BIDDER/VENDOR/SUPPLIER/
CONTRACTOR:
FEATURES
Actual Manufacturer
of Equipment/Material
PROPOSED
BY
Vendor/Supplier/
Contractor
Name of the Company
Location and address
Name and Signature of
authorized
representative
and date
Official Seal/Stamp
of the Company &
Date
35TMSS01R01/KSB
Date of Approval: December 25, 2016
License=Air Products Middle East Industrial Gases LLC/SA-1111280-t Not For Resale ,2/7/2021 2:17:45 PM Saudi Time
PAGE 14 OF 14