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Home / Download Center / Electrical Software Reviews / Calculate Size Of DOL and Star-Delta Starter Components
Calculate Size Of DOL and Star-Delta Starter Components
Calculate Size Of DOL and Star-Delta Starter Components

Easy way to calculate motor torque, fuse, CB, OL relay and contactor

For both DOL and Star-Delta Starter input fields are:

  1. System Voltage (V)
  2. Phase (1ph/3ph)
  3. Type of Motor (single phase, 3-phase induction, synchronous, wound rotor etc.)
  4. Motor Size (HP or kW)
  5. Motor Code (A, B, C… -H)
  6. Motor Efficiency (%)
  7. Motor RPM
  8. System P.F
  9. Application of Motor (motor load in household application, hermetic refrigerant comperssor motor etc.)

According to above inputs, following starters components are calculated:

Motor Torque / Current

  • Motor Rated Tourque (Full Load)
  • Motor Rated Tourque (Full Load)
  • Motor Starting Torque
  • Lock Rotor Current IL (Min)
  • Lock Rotor Current IL (Max)
  • Motor Starting Current
  • Motor Full Load Current (Line)
  • Motor Full Load Current (Phase)

Fuse (As per NEC 430-52)

  • Non-Time Delay Fuse (Max)
  • Time Delay Fuse (Max)

Circuit Breaker (As per NEC 430-52)

  • Instantaneous Trip Circuit Breaker (Max)
  • Inverse Time Circuit Breaker (Max)

Over Load Relay Setting

  • Relay Min (70% of FLC Phase)
  • Relay Max (120% of FLC Phase) or
  • Relay Setting (100% of FLC Line)

Contactor (for DOL starter)

  • Type of Contactor
  • Making / Breaking Capacity of Contactor:
  • Main Contactor (100% of FLC Line):

Contactor (for Star-Delta Starter)

  • Type of Contactor:
  • Making / Breaking Capacity of Contactor:
  • Main Contactor (58% of FLC Line):
  • Delta Contactor (58% of FLC Line):
  • Star Contactor (33% of FLC Line):

Transient Time Delay Setting (for Star-Delta Starter)

Software:Calculate Size Of DOL and Star-Delta Starter Components
Version:10.6.13
Developer:Jignesh Parmar
Size:274 KB
Price:Free
Download:Right here | Video Courses | Membership | Download Updates
Calculate Size Of DOL and Star-Delta Starter Components (Contactor Configuration Sheet)
Calculate Size Of DOL and Star-Delta Starter Components (Contactor Configuration Sheet)

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31 Comments


  1. AMARNATH
    Oct 07, 2021

    thank you, Great

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