YASKAWA V7 Technical Manual page 29

1.4 ELECTRICAL INSTALLATION
D. Auxiliary Input and Output Power Option Devices
A disconnect device (circuit breaker, contactor, disconnect switch, etc.) should NOT be used as a
means of starting and stopping the drive or motor.
A disconnect device can be installed for emergency stop purposes, but when that disconnect device
is opened, there may be loss of electrical braking.
Figure 1-3 is a factory guideline for proper wiring practices and relative locations within the electrical
path from the line to the load. It does not imply what devices are needed for a particular application,
nor does it show what devices were shipped with a particular order. Therefore, disregard those items
in the diagram which are not being used in your installation. However, it is recommended that an
input or DC reactor be used with all Drive ratings when wired to a source of 600 kVA or greater.
Mount all optional power devices close to the drive, and keep electrical connections as short as
possible.
DO NOT run input and output wiring in the same conduit.
NOTES
1. Connect drive ground terminal or panel to
earth ground. Always use low impedance
paths and connections.
2. Mount input and output RFI filters physically
as close to the drive as possible (on the same
panel, if possible). Filters should have a solid
connection from filter case or ground terminal
to drive panel or ground terminal (conduit with
good bare metal to bare metal connections
may serve as the path). If multiple input or
output RFI filters are used, they must be
wired in parallel.
3. Shield conductors with metallic conduit.
4. Connect output conduit in a manner that
allows it to act as an unbroken shield from the
drive panel to the motor casing.
5. RF noise filter (different from RFI filter) part
no. 05P00325-0023 is a delta wye capacitor
network which is wired in parallel with the
drive input terminals. On the smaller drives
with die cast chassis, it must be mounted
externally. On the larger drives with sheet
metal chassis, it may be mounted inside the
area where the input power wiring enters the
drive. On units equipped with bypass, it may
be wired to the primary side of the circuit
breaker and mounted to the bypass panel or
sidewall.
6. Connection points:
Drive w/o Bypass
Input L1, L2, L3
Output T1, T2, T3
Figure 1-3. Customer Connection Diagram For Isolation Transformers, Input Reactors,
Input RFI Filters, DC Reactors, Output Reactors and Output RFI FIlters
ISOLATION
TRANSFORMER
L3
H3
CUSTOMER'S
L2
H2
3Ø A.C. LINE
POWER
L1
SUPPLY H1
Drive w/ Bypass
Ckt Brkr L1, L2, L3
Unwired side of
Overload relay
Continued
INPUT
RFI FILTER
X3 C1(L3) (L3)C2
L
L
O
I
X2 B1(L2) (L2)B2
A
N
D
E
X1 A1(L1) (L1)A2
(G)
EARTH GROUND
SEE NOTE 2
RF NOISE
FILTER
SEE NOTE 5
EARTH GROUND
SEE NOTE 2
EARTH GROUND
SEE NOTE 1
OUTPUT
RFI FILTER
OUTPUT
REACTOR
A.C. MOTOR
1-11
INPUT
REACTOR
C1
C2
B1
B2
A1
A2
SEE NOTE 3
L1 L2 L3 L11 L21 L31
INPUT REACTOR
AC DRIVE
+ 1
SEE NOTE 6
+ 2
OUTPUT
T1 T2 T3
SEE NOTES 3, 4
TO CASE
1 2 3
IN
EARTH
OUT
GROUND
4 5 6
SEE NOTE 2
SEE NOTES 3, 4
A1 B1 C1
A2 B2 C2
SEE NOTES 3, 4
T1 T2 T3
DC