Electric Motor Calculator – Current, Cable Size, MCB & Power Calculation

ProCal Motor

IEC 60364 / IEEE Compliant

Nameplate Data

Rated Power

kW HP

Voltage (V)

Phase 3-Phase 1-Phase

P.F (cos φ)

Efficiency (%)

Speed (RPM)

Installation & Cable

Distance to Motor (meters)

Material Copper (Cu) Aluminum (Al)

Ambient Temp (°C)

Install Method Perforated Tray Buried/Conduit

Grouped Cables 1 (Single) 2 3 4-6 7-9 10+

Motor Study Report

Generated on

---

1. Electrical Analysis

Rated Current (FLC)

--

Amps

Starting (DOL)

-- A

Starting (Y-Δ)

-- A

Slip

-- %

Apparent Power

-- kVA

Reactive Power

-- kVAR

Torque

-- Nm

2. Cable Sizing

Recommended Size

--

mm²

Copper XLPE/PVC

Derated Capacity

-- A

Iz > Ib

Voltage Drop -- V

--% Limit: 5%

Voltage drop exceeds 5%! Increase cable size.

3. Protection

Circuit Breaker

MCB / MCCB (Curve D/C)

-- A

Overload Relay

Thermal Setting

-- A

Contactor

AC-3 Rating

-- A

Earth Cable

Min. CSA

-- mm²

Calculations based on:

• IEC 60364-5-52 for cable capacities (30°C Ambient base).
• Approximate voltage drop using resistivity method.
• Standard motor efficiency curves (IE2/IE3 typical).

ver 2.4.0

Use for estimation only.