weEk4: 18&19th dAys!

Next we have been transfered to metering department.Tn.Haji Azmi asked us to follow the technician to go to home by home to placed the meters.

He explained a little bit about metering unit.

Meter is a device to measure the electricity sold by the electric utility company.

it is also used to measure the electric energy passing through various parts of the generation, transmission and distribution systems.

There are 3 types of meter:

a)Single-Phase Low Voltage Meter

b)Three-Phase Low Voltage Meter

c)Current Transformer Meter (CT Meter)

Maximum Demand
Metering Requirement
< 10 kVA
Single phase, two wire 240V
10 kVA < X < 45 kVA
Three phase, four wire 415V
45 kVA < X < 500 kVA
Three phase, four wire CT meter 415V

Generally, supplies to domestic premises are given at single phase. However, TNB does provide three phase supply where the load requirements justify it.

check out the address!

CT meter : use digital electronic meter

capacitor band

main switch

the old one: meter electromechanical

the new one: meter electronic

A box for neutral wire connection between TNB supply and the contractor’s wiring for the house. Rated current for neutral link is 60A and 100A.

wEek4: 15,16&17th days~

this week we still at the substation department.we are so lucky because uncle Rajah from PMUKB (Pencawang Masuk Utama Kota Bharu) willing to explain and teach us about what actually covered in this department!

A substation is defined as the combination of voltage transformation and control equipment that provides supply voltage suitable for the consumers’ utilization needs.

as we already know,there are few types of substation which are:

a) Indoor substation
b) Outdoor substation
c) Pole mounted substation (H-pole)
d) Package or Compact substation

we also need to understand the substation's compartment.There are 3 main compartments of a substation. They are:
a) Transformer >a device that use for step up or step down the voltage )

b) Switchgear > Received the 11kV and feed to transformer.
> Isolate supply when it is needed

c) Low voltage distribution board (LVDB) or feeder pillar >a device that supplies the low voltage to consumers.

we also got an opportunity to see how the maintenance of substation.The purpose of maintenance of substation is to avoid supply interruption to consumer and to protect the TNB’s properties such as transformer and switchgear.

the transmission line
inside the PMU

maintenance job~