Protection Relays

Sycon Products

SYCON-770X - Protection Relay - Earth Leakage Relay

Sycon 770X

Earth leakage current give rise to temperature and progressive failure of insulation which leads to operating flash over. It is essential to detect earth leakage current well before they cross threshold limits and isolate the circuit. SYCON 770X Earth leakage Relay continuously detects the leakage current with the help of CBCT (Core Balance Current Transformer.) The CBCT is mounted externally. The current carrying cables (it may be 3 phase supply or 1 phase supply) are passed through the CBCT. CBCT detects the level of current and trip the device at set current & time.

Order code Current Range Tripping Time
SYCON 7701 30 mA to 300 mA 0.15 Sec To 3 Sec
SYCON 7702 300 mA to 3 A 0.15 Sec To 3 Sec
SYCON 7703 1 A to 8 A 0.15 Sec To 3 Sec


  • Green LED for Healthy Indication
  • Red LED for trip indication

General Features

  • Solid state
  • Wide operating current range
  • Low power consumption
  • Variable current and time setting
  • Ideal for compliance to I E rule 61-A

Control Features

  • Site settable Current & Time
  • Reset Facility
  • Test Mode Facility

Electrical Specifications

Input Auxiliary Supply 230 VAC (110 VAC & 415 VAC optional)
Current Sensitivity Variable from 30mA to 8A settable with DIP switches in three different models
Trip Time From 0.15 Seconds to 3.00 seconds settable with DIP switches
Relay Contacts Potential free NO-C-NC, 10Amps at 250 VAC contacts
Trip Indication LED
CBCT 65 mm, 100 mm, 150 mm, 200 mm ,250 mm ,300 mm
other diameters available on request

Mechanical Specifications

Dimensions 96 (L) x 96 (W) x 60 (D) mm
Panel Cutout 91 mm X 91 mm

Wiring Diagram

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Systems & Controls (Sangli) Pvt. Ltd.

C-24, MIDC, Miraj 416410
Sangli, Maharashtra, India

Phone: +91 233 2644765 / 2644320
Fax: +91 233 2645053