Technical Manual VERSION 2.0 -10-18-2018
67
●Faults or grounds in power transformer
●Heavy reactive single phase loads such as welders
A 3phase unbalanced voltages protector is upon request as optional accessory. Please contact Hanbell for more
details.
5.4 Grounding
There’s a grounding terminal inside cable box. Please accurately connect it to grounding of control panel for the system.
Suggestion:
a. The regular setting of electric leak protection should be greater than 50mA; for a humid location, 25mA is better.
b. Grounding voltage of casing should be no greater than 50V; for a humid location, the limit is 25V.
c. Grounding resistance should be no greater than 500 Ohm.
d. Air cut board (ACB) is regularly equipped with electric leak protection. Please refer to related settings for its normal
action.
e. If electric leak protection is active, please check if insulation of equipments is normal and if its wiring and setting are
correct.
Please make sure nothing is wrong before turning on the power. If there are any questions, please contact the
supplier of equipments.
Figure 58 Grounding Terminal
B:Pt100 / Pt1000
(Optional)
PW2:7,8,9
PW1:1,2,3
A:PTC
39
17
2
Earth Bolt
8
A
B
B:Pt100 / Pt1000(Option)
A:PTC
A
Earth Bolt
B
V
W
Y
X
Z
U
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