Coordination type (IEC 947-4-1)

Coordination type :

• Without Coordination
• Coordination Type 1
• Coordination Type 2
• Total Coordination

Without Coordination

• In the event of short circuit
  - Poses risks to operators and personal
  - At risk of installation and equipment
• All components of the starter motor must be replaced before restarting

Coordination Type 1

• In the event of short circuit
  - Not endanger personnel or installations
  - Contactors and / or may experience damage Overload Relay
• Before the restart, the starter motor component must be repaired

Coordination Type 2

• In the event of short circuit
  - Not endanger personnel or installations
  - No damage to starter
  - The possibility of contactor contacts melt can occur, but easy to be replaced
  - Electrical insulation is still the same, and the starter motor is still capable of operating at the same level of short circuit
• Before the restart, a simple check to be sufficient

 

Total Coordination

• In the event of short circuit
  - Not endanger personnel or installations
  - There was no damage to the starter
  - No contact is melted contactor
  - Electrical insulation is still well preserved
  
• Restarting can be done immediately

 

Type Selection Coordination

Example Use in Industry