The voltage between phase to neutral not exceed than 600V (alternative
current). The voltage between phases not exceeds 1000V (direct current). SAVR works include:
a)Stretch or tighten a new line or Bare Wire type ANC.
b) Digging, planting and replacing wooden pole to spun concrete pole.
c) Connect the broken line.
d) Install the Black Box or fuses.
e) Make and Plant 'stay wire' and all the equipment.
f) Attract and change house new service users.
g) Install the neutral link and 'cut out' to users.
h) The system of street lighting.
i) Handle 'Breakdown'.
j) Cutting the branches on the top line (rentis).
Material usually used:
- J-HOOK
- Used to hold and support the terminal and gripping suspense setter (suspension clamp).
- SUSPENSION CLAMP
- Used in suspension or neutral wire coated cause damage to the insulation.
- DEAD END CLAMP
- Used to hold tension on the cable terminal poles, distribution and corner posts which shifts the angle exceeds 30 degrees.
- There are three sizes supplied depending on the size of the suspension or neutral wire 25mm, 70mm, and 120mm
- NYLON TAPE
- Black nylon binder used to bind the core back kedawai suspension or neutral conductor in each place where the conductor out of the cassing when installation materials made on line.
- IPC ( insulation piercing conductor )
- IPC is used to obtain the continuity of the electrical connection between the main line with the conductors 'tee-off'. Serrated contact stingy provided can penetrate directly to the conductor insulation to get a good electrical connection without having wasting any cable coating.
- IPC is used to connect the phase conductor sizes and neutral wires are as follows:
* IPC 185-120mm/185-95mm
*IPC 185-120mm.185-16mm
*IPC 120mm/70mm
*IPC 95-70mm/95-70mm
*IPC 95-70mm/25-16mm
*IPC 25-16mm?25-16mm
Tools for testing is
• Test chop
• Voltage indicator (low voltage tester)
Low voltage wire type: 3 x 185
3x 95
3x 16 (most commonly used for 3 phase connection)
1x16 (continued for 1 phase)
There are three types of commonly used POLE in Tenaga Nasional Berhad to support low-voltage power lines:
- concrete pole
- spun concrete pole
- steel pole
- 9 meter - Used on the mains line (main). Planted into the pole depth of 1.5 meters (5ft).
- 7.5 meter - Used in the mains supply (service). Planted into the pole is 1.2 meter (4ft).
This type of pole _ is formed in a circular and grows till at certain base of the post. There are 3 sizes that have different sizes:
i) pole 9m long, 140mm diameter and 260mm top to bottom and has 5 holes. Weight is 400kg concrete pole.
ii) pole 7.5m long, 140mm diameter and 240mm at the top to the bottom and has 5 holes only. Weight is 320kg concrete pole
iii) pole 7.5m long, 100mm diameter and 175 top to bottom and has a 4 hole. Weight is 120kg concrete pole.
There is a hole at the top of the point of the grounding connection is provided at a position 1.2m from head end pole and another hole in the bottom on the position of the tip of mast 1.2m The holes are used to run the ground wire (to enter and remove the ground wire has been provided with a pilot wire contact between the two holes) during the grounding work.
