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2T105 Protection Class Timer Relay

The 2T105 time delay on or off relay is particularly suitable for use in protection & control schemes where precision time delays are required.

A typical use is in providing a definite time delay in circuit breaker failure protection. For example: The transformer multi-trip relays energise the 2T105 timer & if the circuit breaker (CB) fails to clear the fault within the pre-set delay the timer times out & operates a multi-trip relay. This in turn trips all CB's on the section of the busbar connected to the CB which has failed to trip.

Features

  • Four time ranges: 0-0.99s, 0-9.9s, 0-99s, 0-990s
  • High accuracy & repeatability timing compensated for output relay delay
  • Time settings easily selected by digital thumb wheel switches
  • Selectable delay operate or delay release
  • Optional reset functions: Instantaneous, definite time, count down
  • 4 C/O output contacts
  • Wide auxiliary supply range with fail alarm contact
  • Timing in progress LED
  • Non-volatile trip indication
  • Multi voltage timer initiate input
  • Multi voltage flag reset input
  • Size 2M28-S draw out case
  • Made in Australia
 

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