TITLE:
BI – METAL LINE TAP
Doc. No
Issue No.
1
Revision No.
1
Date of Issue
Page No:
KE/300-043
SCOPE
BI – METAL LINE TAP
This specification covers technical requirements of design, manufacture,
testing of bi – metal line taps and accessories for trouble free and efficient
operation per IEC standards & Nigerian specification of local statutory
authorities. The bi-metal line tap shall be designed to provide an effective
corrosion barrier between the dissimilar metals
Reference to NESIS:
Chapter 3 Section 3.2.3
Chapter 7 section 7.2.3.15.3
The equipment provided shall conform with the following standards:
IEC 61284
Overhead Lines – Requirement and Test for
STANDARDS
fittings
And
IEC 60889
Hard-drawn aluminium wire for overhead line
REFERENCES
conductors
IEC 60888
Zinc-coated steel wires for stranded conductors
SYSTEM
DETAILS
The following system parameters are applicable:
Nominal System Voltage
11kV
Highest System Voltage
12kV
Relative humidity
10-100%
Number of phases
3
Safety Factor
≥2.5
Frequency
50Hz
Max. Ambient air temperature
50°C
Creeping distance
320mm
Colour
Silver
Minimum failing Load
6kN
Grounding
Ground through earthing transformer
Issued by: HOG Engineering Standards
Signed:
Date:
Authorized by: Head of Engineering Services
Signed:
Date:
TITLE:
BI – METAL LINE TAP
Doc. No
Issue No.
1
Revision No.
1
Date of Issue
Page No:
Issued by: HOG Engineering Standards
Signed:
Date:
Authorized by: Head of Engineering Services
Signed:
Date: