3.7 Main Circuit Wiring
3.7
Main Circuit Wiring
This section describes the functions, specifications, and procedures required to safely and properly wire the main circuit
in the drive.
N O TICE:
O n ly c o n n e c t re c o m m e n d e d d e vice s to the drive s b ra k in g tra n s is to r term inals. F a ilu re to c o m p ly c o u ld re s u lt in da m a g e to
the drive o r b ra k in g circuit. C a re fu lly re v ie w in s tru c tio n m a n u a l TO B
p
C 7 2 0 6 0 0 0 0 w h en c o n n e c tin g a b ra k in g op tio n to th e drive.
N OTICE:
D o n o t u se the n e g a tiv e D C bu s te rm in a l “- ” as a g ro u n d term inal. This te rm in a l is a t h ig h D C volta ge potential.
Im p ro p e r w irin g c o n n e c tio n s c o u ld d a m a g e the drive.
N OTICE:
E q u ip m e n t Hazard. C o m p ly w ith p ro p e r w irin g p ra ctices. The m o to r m a y ru n in re v e rs e i f the p h a s e o rd e r is backw ard,
ca u s in g in c o rre c t e le v a to r d ire ctio n m o ve m en t. C o n n e c t m o to r in p u t te rm in a ls U, V a n d W to drive o u tp u t te rm in a ls U /T 1,V /T 2, a n d W /
T3. The p h a s e o rd e r fo r the drive a n d m o to r s h o u ld m atch.
Note: D o not solder the ends o f w ire connections to the drive. Soldered wiring connections can loosen over time. Im proper wiring
practices could result in drive m alfunction due to loose terminal connections.
N O TICE:
D o n o t s w itch the drive in p u t to sta rt o r sto p the m otor. F re q u e n tly s w itc h in g the d riv e on a n d o f f s h o rte n s the life o f the DC
b u s c h a rg e c irc u it a n d the D C b u s capacitors, a n d can ca u se p re m a tu re d riv e failures. F o r the fu ll p e rfo rm a n c e life, re fra in from
s w itc h in g the drive on a n d o ff m o re tha n on ce e v e ry 3 0 m inutes.
♦ Main Circuit Terminal Functions
Table 3.1 Main Circuit Terminal Functions
Terminal
Type
200 V
Class
Model
2A0018 to 2A0075
2A0085, 2A0115
2A0145 to 2A0415
Function
Page
400 V
Class
CIMR-LC
4A0009 to 4A0039
4A0045, 4A0060
4A0075 to 4A0216
R /L1
S/L2
Main circuit power supply input
Connects line power to the drive
4 7
T/L3
U /T1
V /T 2
Drive output
Connects to the motor
4 7
W /T 3
B1
Braking resistor
N ot available
Available for connecting a braking resistor or a
3 05
B2
braking resistor unit option
+2
• DC reactor connection (+1,
not available
+1
+ 2 ) (remove the shorting bar
betw een +1 and +2)
• DC power supply input
(+
1
, - )
• DC power supply input
(+
1
, - )
• DC power supply input
(+1, - )
• Braking unit connection
For connection
• o f the drive to a DC power supply (terminals +1
and - are not EU or U L approved)
• o f dynamic braking options
3 08
+3
not available
(+3, - )
-
Grounding terminal
61
Note: U se terminal B1 and - when installing the braking unit (C D BR type) to the drives w ith built-in braking transistor (2A0018 to
2A0115, 4A0009 to 4A0060).
• Wire Gauges and Tightening Torque
Use the tables in this section to select the appropriate wires and crimp terminals.
Gauges listed in the tables are for use in the United States.
Note: 1. Wire gauge recom m endations based on drive continuous current ratings using 75°C 600 Vac vinyl-sheathed w ire assuming ambient
tem perature w ithin 40°C and w iring distance less than 100 m (328 ft.).
2. Terminals B1, B2, +1, +2, and +3, are for connecting a DC reactor, braking resistor or DC power supply. Do not connect other
nonspecific devices to these terminals.
• Consider the amount o f voltage drop when selecting wire gauges. Increase the wire gauge when the voltage drop is
greater than 2% o f motor rated voltage. Ensure the wire gauge is suitable for the terminal block. Use the following
formula to calculate the amount o f voltage drop:
Line drop voltage (V) = -/3 x wire resistance (П/km) x wire length (m) x current (A) x 10-3
• Refer to instruction manual TOBP C720600 00 for braking transistor option or braking resistor option wire gauges.
• Use terminal +1 and the negative terminal when connecting a regenerative converter or a regen unit.
• Use terminal B1 and - when installing the braking unit to the drives with built-in braking transistor (2A0018 to
2A0115, 4A0009 to 4A0060).
•
Refer to UL Standards Compliance on page 403
for information on UL compliance.
56
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual