T3500 Frequency Deviation Relay

$ 1,689.00

Frequency Deviation Relay
T3500 Brochure



Frequency Deviation Relay

  • Acts on Δf/Δt
  • Programmable delay
  • External blocking
  • Loss of mains application
  • Marine approved
The SELCO T3500 Frequency Deviation Relay will, based on a simple AC voltage measurement, monitor the change in frequency over a time period of one second.
The T3500 Pick up LED will ignite as soon as the voltage frequency has changed more than 0.5 Hz to 1.5 Hz per second, while the internal relay (and the relay indication LED) activates after the frequency deviation has existed for more than 100 milliseconds.
The 100 millisecond delay can be omitted by bridging two external connection terminals. An alternative delay of 50 milliseconds can be obtained by inserting a resistor between the two terminals. The Pick Up and Relay LED will ignite simultaneously if the delay is omitted.

Additional information

Weight 2 lbs
Dimensions 9 × 9 × 9 in

T3500.0010 Frequency Deviation Relay. 230V, T3500.0020 Frequency Deviation Relay. 400/450V, T3500.0030 Frequency Deviation Relay. 415/480V, T3500.0040 Frequency Deviation Relay. 100/110V, T3500.0050 Frequency Deviation Relay. 100/110V, Special