Ground Wiring; Main Circuit Connection Diagram - YASKAWA L1000A Series Technical Manual

■ Ground Wiring

W hen using an E M C filter, the le a ka g e cu rre n t e xce ed s 3.5 mA. Therefore, a cco rd in g to IE C 61 80 0-5 -1 , a t le a s t o ne o f the
co n d itio n s b e lo w m u st be satisfied:
a) The cro ss-se ctio n o f the p ro te ctive ea rth in g c o n d u c to r m u s t be a t le a s t 10 m m 2 (Cu) o r 16 m m 2 (Al).
b) The p o w e r su p p ly m u s t be d is c o n n e c te d a u to m a tica lly in case o f d is co n tin u ity o f the p ro te ctiv e e a rth in g conductor.
E le c tric a l S h o ck H azard. A lw a ys use a g ro u n d wire that co m p lie s with te c h n ic a l stan dard s on e le c tric a l e q u ip m e n t a n d
lo c a l in sta lla tion regulations. M in im ize the le n g th o f the g ro u n d wire. Im p ro p e r e q u ip m e n t g ro u n d in g m a y cau se da ng erou s e le ctrica l
p o te n tia ls on e q u ip m e n t chassis, w hich co u ld re s u lt in de ath o r seriou s injury.
E le c tric a l S h o ck H azard. B e sure to g ro u n d the drive g ro u n d term inal. Im p ro p e r e q u ip m e n t g ro u n d in g m a y cause
d a n g e ro u s e le c tric a l p o te n tia ls on e q u ip m e n t chassis, w hich c o u ld re s u lt in death o r seriou s injury.
D o n o t sha re the g ro u n d w ire w ith o th e r d e vice s such as w e lding m a ch in e s o r la rg e -cu rre n t e le c tric a l equipm ent. Im p ro p e r
e q u ip m e n t g ro u n d in g c o u ld re su lt in drive o r e q u ip m e n t m a lfu n c tio n due to e le c tric a l interference.
W hen u s in g m ore than one drive, g ro u n d m u ltip le drives a c c o rd in g to instructions. Im p ro p e r e q u ip m e n t g ro u n d in g cou ld
re s u lt in a b n o rm a l o p era tion o f drive o r equipm ent.
Figure 3.16
■ Wiring the Main Circuit Terminal
E le c tric a l S h o ck H azard. S hu t o ff the p o w e r s u p p ly to the drive b e fo re w iring the m ain circu it term inals. F ailure to com p ly
m a y re su lt in de ath o r seriou s injury.

■ Main Circuit Connection Diagram

Refer to Main Circuit Connection Diagram on page 49
F ire H azard. The b ra k in g re s is to r con ne ction term in als are B1 an d B2. D o n o t c o n n e c t b ra k in g res is to rs to a n y o th e r
term inals. Im p ro p e r w iring con ne ction s c o u ld cau se the b ra k in g re s is to r to o ve rh e a t a n d cau se de ath o r serious in ju ry b y fire. F ailure to
c o m p ly m a y re s u lt in d a m ag e to the b ra k in g circu it o r drive.
3.7 Main Circuit Wiring