Alternating relay AVR 300 and AVR 400

The alternating relays AVR300 and AVR400 are required to alternate the load between pumps and compressors, including in response to a fault.
The goal is to balance the load placed on the machines and even out machine wear.

The alternating relays AVR300 and AVR400 alternate the inputs 3 (4) to the outputs 3 (4).
It is possible to select the required alternating mode according to the following:

- Alternate following each operating cycle
- Following a given number of operating hours
- Fixed alternation after 12 hours

If voltage is applied to one of the fault inputs 3 (4), operations are switched to a fault-free output.
If 1 and 2 have been selected, switchover is initiated after all the inputs are again voltage free.
The control state of the relay and the input with a fault are indicated by means of LEDs.

Principal functions:

  • Choice of three alternating options
  • Switchover to reserve pump(s) when fault occurs
  • LED when output is active
  • LED blinks when fault occurs
  • Easy to install
  • Pluggable Housing

Technical data

Operation voltage 230 V / 50 Hz 24 VDC and 24 VAC (Option)
Power consumption ca. 6 VA
Output contacts 250 V / 50 Hz, 1 A max. 100 VA
Housing ABS
Degree of protection IP 50
Emission
Immunity