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Chapter 3 Installation
The wiring length of brake unit shall not be more than 10m, and only twisted pair or
tight double-line is available in parallel.
Brake resistance cannot be connected onto DC bus directly, or it may cause damag-
es to AC drive, or even fire hazard.
AC drive
≤
22KW and built- in brake unit.
The recommended value of brake resistance model selection reference and wiring
distance shall be less than 5m, or it may cause damages to AC drive.
AC drive output side shall not be connected to capacitor or surge absorber, or it
will frequent protection of AC drive, or even damages.
When the cable of motor is overlong, the effects of distributed capacitance will
generate electric resonance easily, and give rise to dielectric breakdown of motor.
The generated large leakage current makes AC drive suffer overcurrent protection. If
cable length is more than 100m,alternating current output reactor shall be installed.
Terminals must have been reliable ground connection,and resistance value ofground
wire shall be less than 4
Ω ,
or it will cause abnormal work of equipment,and even
damages.
Grounding terminal and null line N terminal of power supply cannot be shared.
C.Brake resistance connection terminal (+) and PB:
D.AC drive output side U, V and W:
E.Grounding terminal :
3.6 Control circuit terminal and wiring
3.6.1 Schematic diagram of control circuit wiring terminal
RA
RB
RC 10V AI1 AI2 AI3 ACM AO1 AO2 ACM SG+
TA
TB
TC
S1
S2 DCM S3
S4
S5
S6 DCM MO1
SG-
P24
Figure 3-4
Schematic diagram of main control board wiring terminal
C
h
a
p
te
r
3
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