Optimum OPTigrind GU 15B Betriebsanleitung Seite 41

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3.6 First commissioning
ATTENTION!
Before commissioning the machine, all bolts, fastenings and protections must be
checked and retightened as necessary!
WARNING!
The use of unsuitable grinding wheels, sanding belts and polishing wheels constitute a
safety hazard. Use only grinding wheels, sanding belts and polishing wheels
thatwithstand the speed requirements and possible loads.
WARNING!
First commissioned of the grinding machine by inexperienced personnel constitute a
risk to personnel and equipment.
We do not accept any liability for damages caused by incorrectly performed commissioning.

"Personnel qualification" on page 35
3.6.1 Power supply

Connect the electrical supply cable.

Check the fusing (fuse) of your electrical supply.
3.6.2 Grinding machines with speed regulated drive
Please check that the type of current, voltage and protection fuse correspond to the values
specified. A protective earth ground wire connection must be available. Mains fuse 16A. Due to
the design, the leakage current is greater than 3,5 mA. We ask for due attention while execut-
ing machine tests within the framework of industrial safety guidelines.
Since a direct current may be caused by the frequency converter in the protective earthing con-
ductor, if an upstream residual current device (ELCB / RCD) is required in the network, the fol-
lowing guidelines must be followed:
To avoid an operating fault, you need an AC/DC-sensitive ELCB. Be absolutely sure which
leakage current security is necessary for dangerous body currents, as regulated in DIN VDE
0100 part 410, at your mains connection.
3.6.3 When the ELCB triggers
Pulse current - sensitive ELCB type A

ELCB type A independent of rated voltage, for triggering when changing fault cur-
rents and pulsing DC fault currents.
AC/DC - sensitive ELCB type B

ELCBs of series type B also accept the detection of smooth AC fault cur-
rents as well as the detection of fault current shapes of type A; they are
therefore suitable for all the circuits mentioned. ELCBs of this series therefore detect all
types of fault current according to the triggering characteristic B, i.e. both smooth DC fault
Unpacking and connecting
Version 1.0.2 dated 2019-9-13
229.5 243.5 281.5
163 163 170
135 135 160
23 36 24
35 35 35
100 100 135
Translation of the original instructions
OPTIMUM
M A S C H I N E N - G E R M A N Y
319
212
170
39
35
138
GU15B │GU18B │GU20B │GU25B
®
GB
Page 41