Yaskawa Sigma-5 User Manual: Setup for Rotary Motors - Manual (Page 78)

3 Wiring and Connection
3.3.2 SERVOPACK Main Circuit Wire Size
3-20
3.3.2 SERVOPACK Main Circuit Wire Size
This section describes the SERVOPACK Main Circuit Wire Size.
External
regenerative
resistor terminals
B1/ , B2,
or
B1, B2
R70F, R90F, 2R1F, 2R8F,
R70A, R90A, 1R6A,
2R8A
If the regenerative capacity is insuf-
ficient, connect an external regener-
ative resistor (option) between B1/
and B2.
3R8A, 5R5A, 7R6A,
120A, 180A, 200A,
330A, 1R9D, 3R5D,
5R4D, 8R4D, 120D,
170D
If the internal regenerative resistor is
insufficient, remove the wire
between B2 and B3 and connect an
external regenerative resistor
(option) between B1/
and B2, or
B1 and B2.
470A, 550A, 590A,
780A, 210D, 260D,
280D, 370D
Connect a regenerative resistor unit
(option) between B1/
and B2, or
B1 and B2.
DC reactor
connection
terminals for
power supply
harmonic
suppression
1, 2
†††A
†††D
Normally short 1 and 2.
If a countermeasure against power
supply harmonic waves is needed,
connect a DC reactor between
1
and 2.
Main circuit plus
terminals
B1/ or B1
†††A
†††D
Use when DC power supply input is
used.
Main circuit minus
terminals
2 or
†††A
†††D
Servomotor
connection
terminals
U, V, W Use for connecting to the servomotor.
Ground terminals
( × 2)
Use for connecting the power supply ground terminal and servo-
motor ground terminal.
(cont’d)
Name
Terminal
Symbols
Model SGDV-†††† Description
1. Wire sizes are selected for three cables per bundle at 40 °C sur-
rounding air temperature with the rated current.
2. Use a wire with a minimum withstand voltage of 600 V for the
main circuit.
3. If cables are bundled in PVC or metal ducts, take into account the
reduction of the allowable current.
4. Use a heat-resistant wire under high surrounding air or panel
temperatures, where polyvinyl chloride insulated wires will rapidly
deteriorate.