Zapi SEM-Zero, Manual

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Page 7
2.3 SAFETY & PROTECTION FEATURES
- Connection Errors :
All Inputs are protected against connection errors.
- Thermal Protection :
If the chopper temperature exceeds 70°C, the maximum current reduces in
proportion to the thermal increase. The temperature can never exceed 80°C (below
-10°C, the current is reduced to 80%).
- Low Battery Charge :
When the battery charge is low, the maximum current is reduced proportionally to
the battery discharge.
- Protection against accidental Start up :
A precise sequence of operations are necessary before the machine will start.
Operation cannot commence if these operations are not carried out correctly.
Requests for drive, must be made after closing the key Switch.
- Protection against uncontrolled movements :
The Line Contactor will not close if :
- The Power Unit is not functioning
- The Logic is not functioning perfectly.
- Main / Line Contactor :
Should be fitted to give protection to the chopper against reverse battery polarity,
and safety.
- External Agents :
The chopper is protected against dust and the spray of liquid to a degree of
protection meeting IP54.
2.4 DIRECTION ORIENTATION
Machines fitted with Tillers, Belly Switches, and Pulse Control Systems providing rapid
reversal should conform to the requirements of Directive prEN 1175. This Directive re-
quires that Direction Orientation should match the following drawing:
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