2C64 Instantaneous Current Check Relay

The 2C63 & 2C64 Series relays are three pole current detectors designed specifically for CB fail applications. A critical requirement is for a fast reset characteristic which is achieved through the use of air core CT's. The low burden auxiliary supply makes the relay suitable for continuous energisation. Harmonic filtering is employed to minimize output relay chattering. Fully solid state sensing & measuring circuitry is employed with each phase current setting continuously adjustable on a front panel control.

The 2C63 definite time current check relay may be specified where an integrated delay timer is preferred. The internal time delay element is initiated when either the current exceeds the user selectable setting or when the internal timer initiate input is energized. The image depicts the 2C63 relay.

The 2C64 instantaneous current check relay may be specified where an integrated delay timer is not required.

The 2C80 current check relay may be specified where a zero stand by burden is required. Initiation of the relay is achieved through application of the auxiliary supply on a single or three phase basis. The linear power supply provides high speed start up but results in higher operating burden & non continuous rating.

Features

• 10:1 PU setting ranges
• 5 - 50% or 20 - 200% of nominal input current
• 1A or 5A nominal CT's
• Fast reset times(<15ms at 20x setting, repeated offset)
• <5% transient over-reach
• Three instantaneous phase segregated(<20ms at 2x setting) C/O contacts
• Timing in progress LED
• Hand & remote flag reset
• 40-300V DC auxiliary supply Power supply fail relay drops out if the Auxiliary supply fails.
• Optional 20-70V DC supply
• Size 4M56 draw out case
• Made in Australia