Units for controlling piston and screw compressors: star-delta starting, motor protection, timed drains, operating temperature and running hours for oil changes and servicing. On special units we add the parameters the manufacturer asks for.
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XVDU071 hour totalizer with alarm
Counts the compressor's running hours and switches an alarm output when the programmed hours are reached: ideal for oil, filter and service reminders.
| 8 digitswith 2 decimals | Partial + totalprogrammable alarm | 8 Aalarm output | 48 × 48 mm11-pin socket |
| Reset | Front and external |
| Alarm | Total and partial alarm programming |
| Supply | 12 VDC · 24 VDC · 24 VAC · 48 VAC · 110 VAC · 230 VAC |
| Machine or installation | What to control | Unit |
|---|---|---|
| Compressor motor above 5.5 kW | Star-delta starting with changeover pause | |
| Compressor with unloader valve | Unloaded start and delayed loading | |
| Receiver and separator | Automatic drain at set intervals for a few seconds | |
| Compressor motor | Phase sequence and phase failure | |
| Compressor motor | Overload due to excess current | |
| Motor and head | Operating temperature | |
| Plant with 2 or 3 compressors | Alternation to share running hours | |
| Refrigeration and HVAC compressor | Anti-short-cycle delay between starts | |
| Maintenance | Running and idle hours, oil change |
Need a special function?
On special units we add the parameters you need to monitor: loaded and idle hours, pressure, alarms or communication with the panel.
Which unit gives an oil change reminder on a compressor?
The XVDU071: hour totalizer with alarm output and total and partial alarm programming.
Which star-delta starter do you recommend?
The VETV02, with a star-to-delta pause adjustable from 0.02 to 2 seconds and 16 A contacts, or the ZETV02 in 17.5 mm.
How is the receiver drain automated?
With an XTDU303 / XTDC303 asymmetrical cyclic timer, which sets the drain time and the time between drains separately.
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