Protection Relays

Sycon Products

SYCON-771X - Protection Relay - Earth Leakage Relays with Test winding CBCT


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 – 771X Earth leakage Relay continuously detects the leakage current with the help of CBCT (Core Balance Current Transformer.) The CBCT is mounted externally. The overall load current whose leakage current is to be detect, 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 7711 30 mA to 300 mA 0.15 Sec To 3 Sec
SYCON 7712 300 mA to 3 A 0.15 Sec To 3 Sec
SYCON 7713 1 A to 8 A 0.15 Sec To 3 Sec

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.

Display Features

  • Healthy & Fault Indication

Control Features

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

Electrical Specifications

Input Auxiliary Supply 230 VAC (110&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 L.E.D
CBCT 65mm, 100mm, 150mm, 200mm other diameter on request

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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