132-1: 2015
CEB
SPECIFICATION
TEMPORARY PROTECTIVE GROUNDING
EQUIPMENT (POLE APPLICATION)
CEYLON ELECTRICITY BOARD
SRI LANKA
Telephone: +94 11 232 8051
Fax: +94 11 232 5387
CEB SPECIFICATION 132-1: 2015
CONTENTS
Page
1. Scope
03
2. System Parameters
03
3. Service Conditions
03
4. Applicable Standards
03
5. Basic Features
03
6. Technical Requirements
04
7. Inspection and testing
05
8. Additional Requirements
06
9. Information to be furnished with the offer
08
10. Annex
07
Annex-A
Schedule of guaranteed technical particulars
08
Annex-B
DS&S/2015/132-1 Temporary Protective Grounding Equipment
11
Annex -C
Non-Compliance Schedule
12
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CEB SPECIFICATION 132-1: 2015
TEMPORARY PROTECTIVE GROUNDING EQUIPMENT (POLE APPLICATION)
1.0
SCOPE
This specification covers the general requirement of design, manufacture and testing of
Temporary Protective Grounding Equipment to be used on de-energized electric power lines
for 11KV and 33KV overhead distribution system of the CEB.
2.0
3.0
4.0
SYSTEM PARAMETERS
(a) Nominal voltage
11kV
33kV
(b) System highest voltage
12kV
36kV
(c)
50Hz
50Hz
(d) Number of phases
03
03
(e) System faults level, rms
(f) Method of earthing
12.5kA
13.1kA
Effectively earthed
Non Effectively earthed
System frequency
SERVICE CONDITIONS
(a)
Annual average ambient temperature
30 °C
(b)
Maximum ambient temperature
40 °C
(c)
Maximum relative humidity
90%
(d)
Environmental conditions
(e)
Operational altitude
Humid tropical climate with polluted
atmosphere
From M.S.L. to 1000 m above M.S.L.
APPLICABLE STANDARDS
The equipment and components supplied shall be in accordance with the latest editions/
amendments of the standards specified below. However CEB Specification shall supersede
these Standards in the event there is a discrepancy.
5.0
(a)
ASTM F855 : 2014
(b)
IEC 61230: 2008
(c)
(d)
IEC 61138: 2007
IEC 60227-1: 2007
(e)
(f)
(f)
IEC 61235: 1993
IEC 60855:2009
ASTM F711-02:2013
Temporary Protective Grounds To be used on De-Energized
Electric Power Lines and Equipment
Live Working – Portable Equipment for Earthing or Earthing
and Short- circuiting
Cables for Portable Earthing and Short-circuiting Equipment
Polyvinyl Chloride Insulated Cables of Rated Voltages up to
and Including450/750 V
Live Working- Insulating Hollow Tubes for Electrical Purposes
Insulating Foam-Filled Tubes and Solid Rods for Live Working
Standard Specification for Fiberglass-Reinforced Plastic
(FRP) Rod and Tube Used in Live Line Tools 1
BASIC FEATURES
The Temporary Protective Grounding Equipment shall be comprised of parts as depicted in
table-01 (Please see Annex-B for the drawing).
Table-01: Parts of the Temporary Protective Grounding Equipment.
Part of the equipment
Grounding cable set – cable length 1.4m
Grounding cable set – cable length 3m
Grounding cable set – cable length 12m
Cluster bar
Temporary grounding rod
High voltage operating stick
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Nos.
3
1
1
1
1
1
Clause reference
6.1,6.2,6.3
6.1,6.2,6.3
6.1,6.2,6.3
6.4
6.5
6.6
CEB SPECIFICATION 132-1: 2015
Each grounding cable set of the Temporary Grounding equipment, should be factory
assembled with clamps, ferrules and clear (transparent) heat shrinkable tubing (sleeve) at
both the ends of ferrule-cable joint.
Ultimate current rating of the Temporary Protective Grounding Equipment shall be equal or
greater than 13.1 kA under the following conditions.
Fault time
X/R
1s
40
Every part of the complete equipment shall be free of structural porosity, fins, sharp edges,
splits, cracks and other defects that affect handling and performance. Further it shall be
formed, machined and assembled with sufficient accuracy, ensuring the smooth manual
operation. Clamps, cables and ferrules shall be assembled tightly and securely to develop the
full short circuit capacity.
6.0
TECHNICAL REQUIREMENTS
Technical requirements for temporary protective equipment are described, item wise for the
ease of description.
6.1 Grounding Cables
All the properties of the cable shall be in accordance with IEC 61138 or ASTM F855 and
relevant references for each.
Properties of the cables shall be as depicted in table-02.
Table-02: Properties of the cable.
Properties
Conductor size
Conductor Material
Minimum
number
of
strands
Material of cable covering
Thickness
of
cable
covering
Color of the cable covering
IEC 61138
50mm
2
Stranded Annealed Copper
1442 (Diameter of a wire-0.21mm)
General purpose thermoplastic
based on a compound of
thermoplastic polyvinylchloride or
one of its co-polymers as per IEC
61138, clause 1.6.2.1
1.5mm ±0.25mm
No color (transparent)
ASTM F855
American Wire Gauge 1/0
(53.48 mm2)
Stranded Soft-drawn Copper
259(Diameter
of
a
wire0.51mm/20.2mils) or more
An elastomer material as per
ASTM D753,D7268,D2270 and
D2229.
1.14mm (minimum)
No color (transparent)
Cables shall be free of structural defects that affect installation, assembly or performance and
solder parts are not allowed.
6.2 Clamps
Clamp shall be of Copper based alloy or Aluminium based alloy and having following
mechanical and electrical properties.
Properties of the clamp material shall be as depicted in table-03.
Table-03: Properties of the clamp material.
Property
Minimum tensile strength
Minimum yield strength
Minimum elongation
Copper based alloy
207 MPa (30 000 psi)
90 MPa (13 000 psi)
6%
Alumium based alloy
207 MPa (30 000 psi)
138 MPa (13 000 psi)
3%
The type of the clamp should be an equivalent of C-type grounding Clamp and Jaws of the
clamps should have serrated contact surfaces.
Resistance of the clamp shall be less than that of an equal length (equal to the length of the
clamp) of grounding cable. Clamps shall accept hand assembly of all cables fitted with
compatible ferrules and, it shall be able to accommodate conductor sizes from 4mm to 20mm
diameter. Further, clamps shall be equipped with eyes to install with removable hot sticks.
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CEB SPECIFICATION 132-1: 2015
Positive screw locking device or any other mechanism to protect against unintentional loosing
of nut of the ferrule after fixing it to the grounding clamp shall be provided.
In the event the clamp is over tightened during installation, normal fracture shall be such that
the attached cable remains under control by being retained with the stick.
Minimum clamp torque strength
Yield = 32 Nm. / Ultimate= 37 Nm.
6.3 Ferrules
Type of the ferrule shall be Threaded Stud Shrouded Compression, and they shall accept
cables for which they are rated without alteration of strands, and can be assembled by hand
with compatible clamps. Ferrule design shall be suitable to the current carrying capacity and
the size of the grounding cable. It shall be provided an inspection vent-hole (minimum
diameter-3mm) at the cable connecting end of the ferrule.
Ferrule material
Copper based Alloy (Copper content 60% minimum).
6.4 Cluster bar
Cluster bar shall be designed to attach two clamps (described in clause 6.2) together, and the
chain of the cluster bar shall be of adjustable type. The current rating of the cluster bar should
be twice that of the current rating of clamps.
Length of the Chain
Cluster bar material
150cm ± 5cm
Copper based alloy/ Aluminium
base alloy/Aluminium
6.5 Temporary Grounding rod
The Copper clad steel spindle, screw type Temporary Grounding Rod shall be provided with a
suitable bronze spiral and a handle, pinned at both the ends.
Total Length
Diameter of the rod
150cm ~ 180cm
15mm~ 19mm.
6.6 High Insulating Operating Stick
All the properties shall be in accordance with IEC 61235 and IEC 60855 or ASTM F711-02,
and it should be two meters (2m) in length. Head of the operating rod should match with the
design of the clamp.
Operating Rod category (Pole Category)
Bending Force
Maximum deflection
7.0
Reinforced
100N
65mm
INSPECTION AND TESTING
Type tests and routine tests requirements are given bellow.
7.1 Type Tests
Temporary protective ground set should be subjected to following type tests according to
ASTM F 855 – 97 or, according to IEC 61230.
Table-04: Type tests as per ASTM F 855 – 97 and IEC 61230.
(a)
(b)
(c)
(d)
ASTM F 855 – 97
Mechanical torque strength test on grounding
clamps (ASTM F 855, Clause 12.2)
Electrical short circuit capacity test on grounding
cable (ASTM F 855, Clause 12.3, and Clause
25.2)
Testing of jackets of grounding cables (ASTM
Test Methods D470, D2633, and Clause
35.2.3.2)
Bending deflection check on Insulated Operating
Sticks(ASTM F 711-02,Clause 12.3.1)
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IEC 61230
Fatigue test on cable with end fittings on
grounding clamps (IEC 61230, Clause 6.2)
Short circuit current test on grounding
cable (IEC 61230, Clause 6.6)
Testing of jackets of grounding cables(IEC
60227-1, Table 2)
Bending Test on Insulated Operating
Sticks (IEC 61230, Clause C.3)
CEB SPECIFICATION 132-1: 2015
Test certificates shall be from an accredited independent testing laboratory acceptable to
the purchaser. Proof of accreditation by a national/ international authority shall be forwarded
with the offer. Test reports shall be complete including all the pages as issued by the testing
authority. Parts of test reports shall not be acceptable.
7.2 Routine Test
The following routine tests as per ASTM F 855 or IEC 61230 shall be carried out on all the
Temporary Protective Ground sets ordered and the routine test reports shall be made
available for the observation of the CEB Engineer at the time of inspection.
a)Visual Inspection and hand operation to verify technical requirements in accordance with
Clause 6.0.
b)Verification of the clamps ferrules and cable size, for markings and lengths as specified.
7.3 Inspection
The selected Bidder shall make necessary arrangements for inspection of the equipment by
an Engineer appointed by the Purchaser and also to carry out in his presence necessary
Acceptance / Sample tests of the materials and equipment, offered. CEB may waive off the
inspection with the condition of carrying out the acceptance tests by an independent testing
authority acceptable to CEB. In such a situation a notice of waive off will be issued in advance
to the supplier.
7.4 Acceptance /Sample Tests
The following Acceptance/Sample tests conforming ASTM F 855 or IEC 61230 shall be
witnessed by the Engineer.
a)Mechanical torque strength (ASTM F 855, Clause 12.2) or Fatigue test on cable with end
fittings (IEC 61230, Clause 6.2)
b)Resistance comparison test (Size of ferrules should be suitable for the current caring
capacity and the size of the grounding cable).
c) Visual Inspection and hand operation to verify workmanship, finish and appearance.
d)Verification of clamps, ferrules and cable size, marking and lengths as specified.
8.0
ADDITIONAL REQUIREMENTS
8.1 Manufacturing Experience
Manufacturer shall have at least ten years experience in the field of manufacturing temporary
protective grounding equipment, and manufacturer shall have supplied the product at least for
five utilities within the past ten years.
8.2 Markings
Markings shall be clearly legible and durable. The letters size shall be at least 3mm high.
Markings are described item wise in the table-05.
Table-05: Markings on the Temporary Protective Grounding Equipment.
Item
Cable
Clamp
Ferrule
Cluster Bar
Insulating Operating Stick
Marking
2
Cross section in mm , material and a double triangle symbol at
1m intervals on each cable.
Name or the logo of the manufacturer, identity number and the
year of the manufacture.
Manufacturer’s identity code.
Manufacturer’s identity code
Name or the trade mark of the manufacturer
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CEB SPECIFICATION 132-1: 2015
8.3 Packing
The temporary protective grounding equipment shall be supplied with carrying case suitable
for rough use at the field for not allowing any deformity of any part of the equipment.
9.0
INFORMATION TO BE FURNISHED WITH OFFER
The following documents shall be furnished with the offer.
a)A Catalogue describing the equipment, type, model number and all the features.
b)A User Manual containing relevant technical literature and complete user guide.
c) Completed schedule of particulars (Please see Annex – A)
d)Certified copy of the quality assurance conforming to ISO 9001:2008.
e)Type test certificates as per clause 7.
f) Evidentiary documents should be produced as a proof of manufacturer’s experience as
per clause 8.1.
Failure to furnish the above will result in the offer being rejected.
10.0 ANNEX
Annex-A
Schedule of guaranteed technical particulars
Annex-B
DS&S/2015/132-1 Temporary Protective Grounding Equipment
Annex -C
Non-Compliance Schedule
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CEB SPECIFICATION 132-1: 2015
ANNEX-A
SCHEDULE OF GUARANTEED TECHNICAL PARTICULARS
CEB Specified
1.
2.
3.
4.
5.
Name of the
manufacturer
Country of the origin
Model No. as stipulated
in the catalogue
Applicable Standards
a)Cable size
IEC61230,IEC16138,IEC61235,IEC602271,IEC6855/ASTMF855- 97,ASTM F711-02
AWG 0/1 or 50mm2
b)Cable Material
Annealed copper / Soft-drawn copper
c) Stranding of the cable
e)Thickness of the
covering
IEC 61138(1442 strands, Dia. Of a strand0.21mm)/ASTM F855 (259 strands, Dia.
Of a strand-0.51mm/20.2mils)
As per IEC 61138, clause 1.6.2.1/ As per
ASTM D753, D7268, D2270 and D2229.
1.5mm ±0.25mm -IEC/1.14mm (Minimum),
ASTM.
f) Color of the covering
No color (Transparent)
a)Clamp material
Copper based
alloy
207MPa
Aluminium based
alloy
207MPa
c) Clamp material Yield
strength, min
90MPa
138MPa
g)Clamp material
Elongation, min
6%
3%
h)Line Clamp conductor
range
4mm-20mm
i) Clamp torque strength
Yield, min
32Nm
j) Clamp torque strength
Ultimate, min
37Nm
k) Type of the line Clamp
C-Type or equivalent
l) Device to prevent
slippage or rotation of
the screw and nut of
ferrule
Available
m)
Marking on the
clamp
Name or Logo of the manufacturer,
Identity number, year of manufacture
a)Ferrule Type
Treaded Stud Shrouded Compression
b)Ferrule Material
Cu based alloy – Cu, 60% min.
d)Covering Material
6.
b)Clamp material
Tensile strength, in
7.
8/12
Offered
Comment
CEB SPECIFICATION 132-1: 2015
8.
c) Marking on the ferrule
Manufacturer’s identity code
a) Cluster bar chain
length
150cm±5cm
b) Material of cluster bar
Copper based alloy/ Aluminium based
alloy/Aluminium
Minimum, twice that of the current rating of
the provided clamp
c) Current rating of the
cluster bar
9.
10.
d) Marking on the
Cluster bar
Manufacture’s identity code
a) Temporary
Grounding rod type
screw type
b) Material of the
spindle
Copper clad steel
c) Material of the screw
and handle
Bronze
d) Diameter of the rod
15mm-19mm
e) Length of the Rod
150 cm-180cm
a) High insulating
operating rod
category
Reinforced
b) High insulating
operating rod
bending force,
minimum
100N
c) High insulating
operating rod
maximum deflection,
maximum
65mm
d) Marking of the
operating rod
Name or the trade mark of the
manufacturer.
11.
Ultimate current carrying
capacity of the
equipment after 1 second
of the fault occurrence,
X/R=40.
12.
Whether the offered
Temporary Protective
Ground sets are fully
conform to,
Clause 5.0 – Basic
Features?
Clause 6.1 – Grounding
Cables?
13.1kA
Yes/No
Yes/No
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CEB SPECIFICATION 132-1: 2015
13.
14.
15.
Clause 6.2 – Clamps?
Clause 6.3 – Ferrules?
Clause 6.4 – Cluster bar?
Clause 6.5 – Temporary
grounding rod?
Clause 6.6 – High
insulating operating
sticks?
Whether the Type Test
Certificates are furnished
as per Clause 7.0?
Whether the Acceptance
/Sample Tests as per
Clause 7.0 will be carried
out?
Whether the 9001:2008
quality assurances
certificate furnished?
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
I/We certify that the above data are true and correct.
--------------------------------------------------------
--------------------------
Seal and the signature of the manufacturer
Date
10/12
CEB SPECIFICATION 132-1 : 2015
Annex B
See Datail "X"
FERULE
( Detail -W )
Eye
Clamp
Shrink
Tubing
Cable
Ferule
See Detail
"W"
Shrink
Tubing
Cluster Bar
( See Detail "Y" )
CLAMPS
GROUNDING CABLE SET
( Detail -X )
Clamp Lock
CLUSTER BAR
( Detail -Y )
See Datail "Z"
Earth Rod
Drive
EARTH ROD
( Detail -Z )
Note :
All the figures are indicative
DISTRIBUTION STANDARDS & SPECIFICATION
CEYLON
ELECTRICITY
BOARD
SCALE : NOT TO SCALE
DRAWN : LALANI
TEMPORARY PROTECTIVE GROUNDING EQUIPMENT
DATE : March, 2014
DESIGNED BY
APPROVED BY
DRG. NO : DS&S /2015/132-1
RE PROJECTS & PROC.
( REGION - 01) BRANCH
E.E. ( R E P & P )
11/12
CHAIRMAN, SPECIFICATION COMMITTEE
CAD NO :
CEB SPECIFICATION 132-1: 2015
Annex – C
Non-Compliance Schedule
On this schedule the bidder shall provide a list of non-compliances with this specification,
documenting the effects that such non-compliance is likely to have on the equipment life and
operating characteristics. Each non-compliance shall be referred to the relevant specification clause.
Clause No.
Non-Compliance
……………………………………………….
Signature of the Manufacturer/bidder and seal
12/12
……..……………
Date