Units for controlling the movements of overhead cranes, tower cranes, gantries and hoists: lifting, travel and slewing. Rugged electronics designed for panels with heavy electrical noise, in DIN-rail and 48 × 48 mm panel formats. We also design custom electronic boards and can fit your crane with a capacitive HMI touch screen driven by a sequencer (a small PLC), at a much lower cost than a PLC with an HMI display.
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ZCFF01 phase sequence and failure relay
A crane that starts with a reversed or missing phase moves the load in the opposite direction to the command. The ZCFF01 detects it before the manoeuvre and cuts the control circuit.
| 208 – 480 VACsupply | 85 %detects regenerated phases | 8 Aoutput contact | 17.5 mm1 DIN module |
| Variants | ZCFF01 no delay · ZCFF02A 0.5 s delay · ZCFF02B 1 s delay |
| Detection | Phase sequence and phase failure |
| Mounting | 35 mm rail (EN 60715) |
| Machine or installation | What to control | Unit |
|---|---|---|
| Crane power supply | Phase sequence and failure before any manoeuvre | |
| Crane panel | Alarm for over/under voltage and phase loss | |
| Hoist motor | Overload due to excess current | |
| Hoist motor | Winding temperature | |
| Motor brake | Brake delay and manoeuvre times | |
| Travel and slewing | Pause when reversing direction | |
| Trolley and hook with encoder | Position with slow-down pre-warning and final stop | |
| Tower crane anemometer | Pre-warning and stop on wind speed | |
| Whole crane | Running hours for periodic inspections |
Need a special function?
We adapt our standard units and design custom functions for crane and hoist manufacturers and maintenance companies.
Custom solutions: Sequencers with HMI display · Custom units · Custom electronic boards · Machine builders (OEM)
What is the difference between the ZCFF01, ZCFF02A and ZCFF02B?
All three monitor phase sequence and phase failure. The ZCFF01 trips with no delay; the ZCFF02A waits 0.5 seconds and the ZCFF02B 1 second before tripping, to avoid nuisance trips on short dips.
How is the hoist motor protected against overload?
With a ZCIx5xx maximum current relay, which has a built-in toroid, or with the MCIV02 when programmable maximum and minimum alarms are needed.
Can a wind pre-warning be given with standard units?
Yes. The XVEU102 tachometer converts the anemometer pulses with its scaling factor and has two presets: one for the pre-warning and one for the stop.
See also: Construction · Compressors · Price list
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Machine builders (OEM)
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