Admin Table of Contents
- 1 How many amps is a 167 kVA transformer good for?
- 2 How many amps is a 75 kVA transformer good for?
- 3 How many amps can a 10 kVA transformer handle?
- 4 What size breaker do I need for a 45 kVA transformer?
- 5 How to calculate the voltage of a transformer?
- 6 How big is the exciting current on a no load transformer?
How many amps is a 167 kVA transformer good for?
Three Phase Transformer
| KVA | 208V | 600V |
|---|---|---|
| 50 | 139 | 48.2 |
| 60 | 167 | 57.8 |
| 75 | 208 | 72.3 |
| 100 | 278 | 96.3 |
How many amps is a 75 kVA transformer good for?
| Three Phase Transformers, Full Load Amperes (FLC) | ||
|---|---|---|
| KVA | 208V | 240V |
| 75 | 208 | 180 |
| 112.5 | 312 | 270 |
| 150 | 416 | 360 |
How many amps can a 10 kVA transformer handle?
45.45 Amps
It’s comprised of both electrical potential (Volts) and electrical current (Amps). 1 kVA is a frequently used unit; it represents 1,000 Volt-Amperes….kVA To Amps Calculator (With Table)
| kVA (Apparent Power) | Voltage (220 V) | Amperage (A) |
|---|---|---|
| How many amps is 5 kVA? | 220 V | 22.73 Amps |
| How many amps is 10 kVA? | 220 V | 45.45 Amps |
How do I choose a transformer?
To select the proper transformer, determine the input and output voltages, frequency and current. The faster the voltage changes, the higher the frequency. The higher the current, the more heat is produced.
What size breaker do I need for a 75 kVA transformer?
125 Amp
The rated current of the transformer can be used as the basis for a breaker. The rated current of a 3 phase, 75 kva transformer is 112 Amps, which is 25% of the rated current of a 125 Amp breaker.
What size breaker do I need for a 45 kVA transformer?
For a 45kVA transformer, 125A×1.25=156A, so use a 175A protection device.
How to calculate the voltage of a transformer?
Transformer Formulas. The transformer calculator uses the following formulas: Three Phase Transformer Full-Load Current (Amps) = kVA × 1000 / (1.732 × V) V = voltage (volts). I2 = secondary current. Example: A 50 kVA single-phase transformer has a 4000 V primary, and a 400 V secondary. Assuming an ideal transformer,
How big is the exciting current on a no load transformer?
The no-load primary current I0 called the exciting current, is very small in comparison to the full-load primary current. It ranges from 2 to 5 percent of full load primary current.
How is the kVA rating of a transformer calculated?
Transformer capacity is rated in KVA (kilo-volt-amperes). The load voltage and load amps must be known to calculate KVA rating. * NOTE: We do not recommend loading a transformer above 80% of its KVA rating. When the KVA rating has been calculated, divide that number by 0.8 to get the minimum KVA rating needed.
How to calculate the primary and secondary currents of a transformer?
I2 = secondary current. Example: A 50 kVA single-phase transformer has a 4000 V primary, and a 400 V secondary. Assuming an ideal transformer, determine (a) the primary and secondary full-load currents, (b) the transformer turns ratio. Primary full-load current, I 1 = (50 × 1000 / 4000) = 12.5 A