hager HZI815, Instruction Manual

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8.6. Timers
8.6.1. Fail timers and Return timers
Source failure timers FT and source return timers can be configured using the DIP switches.
The source fail timer FT is the time during which the source can be outside the voltage and frequency
threshold before it is considered lost. (cf. graph below)
The source return timer is the time for which the source must be within the voltage and frequency
threshold before it is considered available. (cf. graph below)
If only one source is present, the controller will give the order to switch to this source before the return
timer has finished counting.
Source available
Start FT
+ΔU/ΔF
[Hyst]
[Hyst]
-ΔU/ΔF
Vn 230 V a c L/N
Un 400 V a c L/L
Fn 50Hz
Start RT Start FT Start RT
T
8.6.2. Cooldown timer
When the switch returns in position I the Cooldown timer will start counting (Default value 180 s) during
the cooldown timer, the contacts will maintain the generator start signals.
8.6.3. Dead band timer ODT
The dead band timer ODT can be configured using the DIP switches 5 (2 s or 0 s). This timer defines the
time for which the switch should stay in the 0 position when transferring from one source to another.
8.6.4. Priority settings
Priority settings can be configured using the DIP switch 2 “PRIO SET” or through communication.
The priority can be set to:
- S1, in this case when source 1 is available the controller will give the order to switch to position I
- No prio, if both sources are available the controller will give the order to remain in the current position.
8.6.5. Tests
HZI815 or HZI825 allows for 2 test functions using the HMI test button:
A short press on this button (< 3 s) will start a LED test, allowing the user to check that all LEDs are
functional.
A long press (> 3 s) on this button will start a TEST ON LOAD, this test will start the genset, and transfer
to the Source 2 once the source is considered available.
The product will remain on source 2 until the test ends, to end the test press again the test button for
more than 3 s to return in the last working mode (Manual or Automatic).
It is also possible to start and stop the test on load and off load through communication.