YASKAWA L1000A Series, Техническое руководство

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8.5 Installing Peripheral Devices
■ Using Braking Units in Parallel
When multiple braking units are used, they must be installed with a master-slave configuration with a single braking unit
acting as the master. Figure 8.16 illustrates how to wire braking units in parallel.
Wire the thermal overload contacts o f all CDBRs and all braking resistors in series, then connect this signal to a drive
digital input. This input can be used to trigger a fault in the drive in case o f overload in any o f the CDBRs or braking
resistors.
© 3 e
D riv e
B ra k in g R e s is to r
O v e r h e a t C o n ta c t
(Thermal Trip Contact)
B ra k in g
R e s is to r
T h e r m a l tr ip c o n t a c t T h e r m a l t r ip c o n ta c t T h e r m a l tr ip c o n ta c t
F ig u r e 8 .1 6 C o n n e c ti n g B ra k in g U n its in P a ra lle l
• Installing a Molded Case Circuit Breaker (MCCB)
Install a MCCB for line protection between the power supply and the main circuit power supply input terminals R/L1,
S/L2, and T/L3. This protects the main circuit and devices wired to the main circuit while also providing overload
protection.
Consider the following when selecting and installing a MCCB:
• The capacity o f the MCCB should be 1.5 to 2 times the rated output current of the drive. Use a MCCB with an
operation characteristics so that the MCCB does not trip faster than the drive overload protection works (shuts off the
drive after 1 min. operation at 150% o f the drive rated current).
• If several drives are connected to one MCCB, use a sequence that shuts the power OFF when an error occurs in one
drive by using magnetic contactor (MC) as shown in the following figure.
B
M C
A - P o w e r s u p p l y C - C o n tr o l P o w e r S u p p ly
B - D rive
F ig u r e 8 .1 7 P o w e r S u p p ly I n t e r r u p t W irin g (E x a m p le )
W ARNING! E le c tric a l S h o c k Hazard. S w itch o ff a n d lo c k p o w e r s u p p ly a n d lo c k th e s w itch b e fo re w irin g term inals. F a ilu re to co m p ly
c o u ld re s u lt in s e rio u s in ju ry o r death.
306 YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual