ZIV - Distance Protection IED

IEC 61850 complied ZIV IEDs can be used as primary or secondary protection in transmission or sub transmission networks, in underground lines, overhead lines or mixed lines of different characteristics like : unbalance loads, one or multiple source, parallel circuits, with or without series compensation etc. It is designed for applications with single- or three phase trips and can be used with or without tale protection schemes.

Protection Functions

• Distance protection 3PH(4 reversible zones)
• Distance protection 1PH/3PH(4 reversible zones)
• Distance protection 1PH/3PH(5 reversible zones)
• Recloser
• Synchronism check
• Minimum voltage
• Maximum voltage
• Maximum ground voltage
• Directional phase overcurrent
• Phase overcurrent
• Directional ground overcurrent
• Ground overcurrent
• Negative sequence directional overcurrent
• Negative sequence overcurrent
• Weak Infeed logic
• Maximum / minimum frequency
• Rate of change
• Thermal image element
• Power swing blocking
• Tripping on loss of stability
• Negative sequence overcurrent (desq. I)
• Close onto fault detector
• Overcurrent supervision for distance detection
• Stub bus protection
• Teleprotection scheme
• Breaker failure
• Trip and Close Coil Supervision
• Pole discordance detector
• Fault locator
• Oscillographic recorder
• Dead Line detector

• Step distance trip
• Extension zone 1
• Permissive underreach trip
• Direct transfer trip
• Permissive overreach trip
• Directional comparison unblocking
• Directional comparison blocking
• Additional logic: current reversal
• blocking, load limiters (load encroachment logic)
• Power swing and fuse failure detector
• Series compensation line logic
• Breaker (KA2) supervision and excessive number of trips
• Integrated simulator
• Four (4) settings tables
• Time delay elements with curve selection (IEC and ANSI)
• Control and monitoring
• Alphanumeric display
• Two (2) dedicated Open/Close buttons
• Six (6) configurable command or control buttons
• Programmable logic
• Communications ports and protocols
• LEDs
• Configurable digital inputs (from 8 to 39)
• Configurable digital outputs (from 6 to 36)
• Time synchronization (protocol IRIG-B 003 and 123) or via communications
• Event and metering history records
• Oscillographic recording (CONTRADE 99 format)
• Power supply voltage monitoring (depending on model)
• ZiverComPlus communications software