Digital Motor Protection Relay

Installation: Panel Mounting Type (Wire Through Type)

Model: DSP-3SD

Main Features

  • Access restricted to authorized operator : Password

  • Compact size, Multi-function

*Protection :
▶ Over current/Under current/Phase loss/Revers e phase/Locked rotor/
Current unbalance : 3SD,3SD-RG
▶ Ground fault : 3SD-RG
*Indication : Current/L1, L2, L3/Earth current

  • To cover a wide and precise current range for the protection

*10 Type
▶ Definite T-I : 0.5A∼10A, 0.5A~6A with extern al CT
▶ Inverse T-I : 0.5A~6A/800% to “oc”
*60 Type
▶ Definite T-I : 5A∼60A
▶ Inverse T-I : 5A~15A/800% to “oc”
*Extended protection current range with external CT : 1A∼600A → 3SD Type

  • Display for trip cause and operation information in character a nd/or number : 4 Digit Window

  • Rotated indication for each phase current with 3 sec interval

*1P(single phase) : L1-L3 current *3P(three phase) : L1-L2-L3

  • Ground fault protection based on residual zero phase current:0.5A~10A(not suitable for external CT application) : 0.5A~10A → 3SD-RG Type

  • Various trip reset options: Manual, Electrical or Automatic / flexible for automated and sequence machine operation.

  • Stable operation under frequency variation from Inverter : 30H z ∼ 400Hz

  • Possible to check and/or to change(optional condition) preset value during the operation

  • Self-diagnostic test by one touch for "SET" key

  • History of latest 8 trip events


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