25/11/2025
What effect does loadshading have on your appliances?
Load-shedding affects appliances in **three major ways**, and these effects can slowly damage or suddenly destroy equipment if not managed well. Here is a clear explanation:
# # ✅ **1. Power Surges (When Power Returns)**
When ZESCO restores power, the initial current spike is often **higher than normal voltage**. This surge can:
- Burn power supplies in TVs, decoders, routers
- Damage fridge and freezer compressors
- Blow chargers, adapters, and extension boards
- Reduce the lifespan of LED bulbs and electronics
**Why this happens:** After an outage, the grid stabilizes slowly, and the sudden inrush current hits appliances that are still “ON”.
# # ✅ **2. Low Voltage & Fluctuations**
During heavy load-shedding rotations, the grid may not return to full voltage immediately. Low voltage can cause:
- Motors (fridge, freezer, borehole pump) to **overheat**
- TVs and electronics to behave erratically or shut down
- Frequent tripping of breakers
- Appliances drawing more current than they are designed for
Low voltage is just as dangerous as a surge — it stresses components.
# # ✅ **3. Frequent ON-OFF Cycling**
This particularly affects **refrigerators, freezers, water pumps, and AC units**.
Effects include:
- **Compressor failure** (most common)
- Broken relays
- Reduced cooling efficiency
- Shortened lifespan of motors
Every time power cuts and comes back, the appliance tries to restart under load, which damages internal parts.
# ⚠️ Vulnerable Appliances (Most to Least)
1. **Fridges & freezers** – compressor stress
2. **Borehole pumps & water pumps** – motor burnout
3. **TVs, decoders, routers, computers** – sensitive electronics
4. **Microwaves & ovens** – circuits and magnetrons
5. **Chargers & adapters** – surge-sensitive
6. **LED bulbs** – flicker damage, premature burning
# ⭐ How to Protect Your Appliances (Practical for Zambia)
# # # **1. Use Surge Protectors**
A must-have for TVs, fridges, routers, computers.
# # # **2. Use a Voltage Guard / Voltage Protector**
Devices like *FridgeGuard, TVGuard, AVS, Sollatek* help:
- Delay restart after power returns
- Block low voltage
- Stop high-voltage spikes
# # # **3. Install a Good Quality MCB or RCCB**
Protects your wiring from overcurrent and short circuits.
# # # **4. For Fridges & Freezers: Always Use a Restart Delay Plug**
This allows the compressor to restart safely.
# # # **5. If Possible → Solar + Inverter + Battery Backup**
Even a small 1–2 kVA system can protect your essential appliances and give continuous power.
