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Delta-Star Converter for Energy Saving

Current Range

  • 0.25 TO 5 Amp
  • 4 TO 61 Amp
  • 40 TO 500 Amp
  • 400 TO 1200 Amp

Product Details

Power Source : 3 Phase 4 Wire [ R-Y-B-N]
CT Type : In built in 0.25-5A / DIN Rail Mount Phase CT Unit in 4-61 A / External Phase CTs for above 61 A
Voltage Type : AC
Application : i MCC & Energy Saving
Display : Back lit LCD 16 X 2
Mounting : Door Mount [Door Cut out 92 X 92 mm]
Output Contact : P-NO & P-NO-NC [3 A 240VAC]


  • Single Phasing Protection Current
  • Single Phasing Protection Voltage
  • Over Load Protection
  • Over Voltage Protection
  • Under Load Protection
  • Under Voltage Protection
  • Phase Un-balance
  • Phase Reversal Protection
  • Locked Rotor Protection
  • Short Circuit Protection
  • Earth Fault Protection


  • C
  • V
  • OL
  • OV
  • UL
  • UV
  • Ub
  • Ph-r
  • L
  • S
  • E
Display : Current
Operating Hour
Start Counter
Trip Counter
Current Status at Last Trip
Voltage Status at Last Trip through.
Standar Features : Selectable IT Curve OR Definite Time
Selectable Trip Time for SPP & UL
Selectable Rotor Locked Value
RS-485 Communication
Digital Timer for Star-Delta Starter
In-built Delta-Star Converter for purpose of Energy Saving
Optional Feature : Add On Current Module For Remote Monitoring of Current.
4 to 20mA O/P w.r.t. Running KW value
Add On Module 4 to 20mA O/P w.r.t. Running KW value

Principle of Operation:

When the motor is loaded for less than 50% of Motor’s full load capacity in terms of power, the motor can be switch over to Star for Energy Saving purpose. Again when load increases beyond 50% of Motor’s full load capacity in terms of power it will automatically convert to Delta without disturbing process.

Motors used to operates high inertia loads require higher capacity motors to meet the starting torque requirements. While in normal running the same motors draw very lesser power than its capacity. In such a cases motor can be start with Star-Delta Starter & as it start to draw a 50 % lower power than its capacity, it can be run in Star to improve its Power Factor and hence sizable amount of Energy can be save.

In such cases, if the motors are connected with DOL starter are worthwhile to convert to a Star Delta starter along with i.MWM-IO/SDS module to get Energy Saving.


Energy saving

Reduction in KVA , contributing to reduction in maximum demand

Improvement in power factor

Motor runs cooler leading to increased motor life.


Your Requirements Of Micro-Controller Based Motor Protection Devices Under One Roof