How do you find the maximum current capacity?
Table of Contents
How do you find the maximum current capacity?
How is current carrying capacity calculated?
- The formula for calculating current carrying capacity is:
- I = permissible current rating.
- ∆Φ = Conductor temperature rise in (K)
- R= Alternating current resistance per unit length of the conductor at maximum operating temperature (Ω/m)
Which cable is used in 11kV?
Technical Specification
| Cable type | Cu/XLPE/SC/SWA/PVC | |
|---|---|---|
| Rated voltage (U) | (kV) | 11kV |
| Voltage to neutral (Uo) | (kV) | 6.35kV |
| Material of conductor | Copper | |
| Nominal cross-section area of conductor | (sqmm) | 185sqmm |
How do you calculate current rating of a cable?
Full Load Current = (KVA · 1000) / (1.732 · Voltage): Full Load Current = (100 · 1000) / (1.732 · 415) = 139 Amp….Let’s select 3.5 core 95 Sq.mm cable for single run, short circuit capacity = 8.2 KA.
- Current capacity of 95 Sq.mm cable is 200 Amp,
- Total derating current of 70 Sq.mm Cable = 200 · 0.93 = 187 Amp.
What is HT cable size?
HT Cable, Size: 95 Sqmm X 3c HT Cable
| Number of Cores | 3 |
|---|---|
| Conductor Material | Aluminum |
| Size | 95 Sqmm X 3c HT Cable |
| Armoured | Yes |
| Minimum Order Quantity | 50 Meter |
How do you find the current capacity of a cable?
Cable Capacity For Cable Current Capacity = 4X Size of Cable in Sq.mm, Ex. For 2.5 Sq.mm = 4×2.5 = 9 Amp.
How do you calculate cable capacity?
Full Load Current = (KVA · 1000) / (1.732 · Voltage): Full Load Current = (100 · 1000) / (1.732 · 415) = 139 Amp….Cable Depth Correction Factor (K5)
| Laying Depth (Meter) | Rating Factor |
|---|---|
| 0.9 | 1.01 |
| 1 | 1 |
| 1.2 | 0.98 |
| 1.5 | 0.96 |