(2) Converter output terminals (P(+), N(-))
Connect the converter output terminals (P(+) and N(-)) to the inverter DC input P(+) and N(-). The premise is that
this connection uses busbars. When using wires for connection, however, keep the wiring length between
stacks within 2 m. When using wires for connection to the PN branch bars or PN branch terminals, keep the wiring
length within 2 m and put the wires close together (or twist them together).
Figure 3.3-6 Restrictions on Using Wires for Connection to PN Terminals
(3) Grounding circuit
• Be sure to connect the grounding terminal E (G).
Fire may result.
Be sure to connect the grounding terminal E (G) of the PWM converter and that of the filter stack for safety and
noise reduction.
From the view of noise reduction, a low circuit impedance is necessary to suppress noise generation and reduce
mutual effects on pieces of equipment. Therefore connect a thick and short cable from the grounding terminal to the
grounding electrode prepared in common with the inverter system.
PN busbar
DCF
Within
2 m
Within
2 m
Converter
stack
Inverter
stack
PN branch bar
(PN branch terminal
)
Put close together
DCF
Converter
stack
Inverter
stack
Within 2 m
between stacks
Use identical
wires.
Put close together
3-13
