3.8 Main Circuit Wiring
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
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3.8 Main Circuit Wiring
This section describes the functions, specifications, and procedures required to safely and properly wire the main circuit
in the regenerative unit.
NOTICE:
Do not switch the regenerative unit input power supply on and off frequently. Frequently switching the unit on and off
shortens the life of the DC bus capacitors, and can cause premature unit failure. For the full performance life, refrain from switching the
unit on and off more than once every 30 minutes.
NOTICE:
Do not solder the ends of wire connections to the regenerative unit. Soldered wiring connections can loosen over time.
Improper wiring practices could result in regenerative unit malfunction due to loose terminal connections.
◆
Main Circuit Terminal Functions
Table 3.3 Main Circuit Terminal Functions
◆
Protecting Main Circuit Terminals
■
Insulation Caps or Sleeves
Use insulation caps or sleeves when wiring the regenerative unit with crimp terminals. Take particular care to ensure that
the wiring does not touch nearby terminals or the surrounding case.
◆
Wire Gauges and Tightening Torque
Use the tables in this section to select the appropriate wires and crimp terminals.
Note: 1.
Wire gauge recommendations based on continuous current ratings using 75
°
C 600 Vac vinyl-sheathed wire assuming ambient
temperature within 40
°
C.
2.
Use terminals and when connecting the drive to the regenerative unit.
Consider the amount of voltage drop when selecting wire gauges. Increase the wire gauge when the voltage drop is greater than 2% of motor rated
voltage. Ensure the wire gauge is suitable for the terminal block. Use the following formula to calculate the amount of voltage drop:
Line drop voltage (V) =
×
wire resistance (
Ω
/km)
×
wire length (m)
×
current (A)
×
10
-3
UL Standards Compliance on page 195
for information on UL compliance.
The wire gauges listed in
are Yaskawa recommendations. Refer to local codes for proper wire
gauge selections.
Terminal
Type
Function
Page
200 V Class
Model
2A03P5 to 2A0105
400 V Class
4A03P5 to 4A0300
R/L1
Main circuit power supply input
These are the power supply input terminals that connect to
the input reactor.
S/L2
T/L3
r1/ 11
Power supply voltage detection inputs
These terminals are to detect the power supply voltage order
and voltage levels.
1/ 21
t1/ 31
DC voltage input
These terminals input a DC voltage
–
For 200 V class: 100
Ω
or less
For 400 V class: 10
Ω
or less
Grounding terminal
–
+
+
–
3
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