Transformer Parameters & Current · 常用电气计算

⚙ Input

Transformer rating Sn (kVA)

HV voltage Uh (kV)

LV voltage Ul (kV)

Load factor f (0–1)

Power factor cosφ

Rated (full-load) current I = Sn/(√3·U). Operating current at a given load and power factor I = f·Sn·10³/(√3·U·cosφ). A distribution transformer is usually loaded to about 80%.

✅ Results

The CT secondary current should not exceed 5 A.

📛 Power & regulating transformer type letters

🗂 Transformer classification by capacity

📏 Standard transformer capacity levels

Standard capacity steps (kVA) in the Chinese distribution/transmission system series.

Transformer Parameters & Current (变压器参数与电流计算)

⚙ Input

✅ Results

📛 Power & regulating transformer type letters

🗂 Transformer classification by capacity

📏 Standard transformer capacity levels