Abdul Ndove

09/05/2026

Single Line Diagram of 33kV/11kV SubsEnEngineer

This is the heart of power distribution system where 33kV incoming supply is stepped down to 11kV for safe and efficient power distribution to feeders and consumers.

♒ Main Components:
✅ 33kV Incoming Line
✅ Lightning Arrester (LA) – protects from surge voltage
✅ Isolator – used for safe isolation during maintenance
✅ Current Transformer (CT) – for measurement & protection
✅ Potential Transformer (PT) – for voltage sensing
✅ Vacuum Circuit Breaker (VCB) – for fault interruption
✅ Power Transformer (33/11kV) – steps down voltage
✅ 11kV Busbar – distributes power to outgoing feeders
✅ 11kV Feeders – supply to industries, residential & utility load

♒ Working Principle: 33kV power enters the substation → passes through protection devices → transformer reduces voltage to 11kV → power is distributed through multiple outgoing feeders safely.

♒ Why Important? Because without proper substation operation, stable and reliable electricity supply is impossible. Protection, control, and safe switching are the backbone of every power system.

N.B

Substation knowledge is the foundation of every Electrical Engineer

04/05/2026

Am an Industrial Automation Engineer.

Am looking out for friends 🙏

29/04/2026

Unaelewa nini Ukiwa umewasha Generator na ikaandika " LOAD DUMP " ?

LET'S GO 👇


Load dump is a type of electrical disturbance, mainly seen in automotive and power systems, where a sudden removal of load causes a high voltage spike.
Simple explanation:
When a large load (like a battery or heavy electrical device) is suddenly disconnected, the system’s energy has nowhere to go → voltage rises sharply → this spike is called load dump.
In automotive systems (most common case):
The alternator supplies power and charges the battery.
The battery acts like a stabilizer (absorbs excess energy).
If the battery is suddenly disconnected (e.g., loose terminal while engine running):
The alternator is still generating power
No battery to absorb it
Voltage can shoot up to 40V–100V+ (in a 12V system)
➡️ This high voltage spike = load dump transient
Why it matters:
Can damage electronic components (ECUs, sensors, ICs)
Causes insulation stress
May lead to system failure
Protection methods:
TVS diodes (Transient Voltage Suppressors)
Zener diodes
Voltage regulators
Snubber circuits
One-line definition:
Load dump is a sudden voltage surge caused by disconnecting a load (especially a battery) from a powered system while energy is still being supplied.
If you want, I can show a waveform diagram or explain how engineers design circuits to survive load dump conditions.

25/04/2026

21/11/2024

Guys express your self,,,

06/10/2024

Recently question for many electricians
Dear guys Remember that.
Salt is sodium chloride help retain soil moisture for effective ground and charcoal help to create a low resistance path to electrode/earth road.

The issue of salt & Charcoal not constantly for all lands materials, some lands have own nature of retaining moisture.

11/02/2024

Dro your comments

18/09/2023

Forward /reverse motor control ⚠️⚡️🦺

18/09/2023

⚡️⚠️🦺👊