Mitsubishi FR-BU2-1.5K, Инструкция по эксплуатации

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16
WIRING
3.4 Connection Example with the GRZG Type Brake
Resitor
Configure a sequence which shuts off power when the brake unit outputs an
alarm to prevent burnout due to the temperature rise of the brake resistor in
case the transistor inside the brake unit is damaged. In addition, it is
recommended to configure a sequence which shuts off power in the input
side by the external thermal relay connected to the brake resistor. The
external connection diagram is shown below.
3.4.1 When connecting one inverter and one brake unit
•
External connection diagram 1
*1 Connect the inverter terminals (P/+, N/-) and brake unit (FR-BU2) terminals so that their terminal
names match with each other. (Incorrect connection will damage the inverter and brake unit.)
Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
*2 When the power supply is 400V class, install a step-down transformer.
*3 When using the FR-BU2 with the FR-A500, A700 series inverter 7.5K or less or FR-V500 series
inverter 5.5K or less, be sure to remove a jumper across terminal PR and PX.
*4 Keep a wiring distance of within 5m between the inverter, brake unit (FR-BU2) and brake resistor.
Even when the wiring is twisted, the cable length must not exceed 10m.
*5 It is recommended to install an external thermal relay to prevent overheat of brake resistors. (Refer
to page 17
)
CAUTION
To replace the existing BU type brake unit, set "1" in Pr.0 Brake mode switchover .
(Refer to page 33 . )
GRZG
GRZG
U
V
W
P/+
N/-
R/L1
S/L2
T/L3
Motor
IM
Inverter
PR
N/-
BUE
SD
P/+
A
B
C
FR-BU2
GRZG type
brake registor
R R
Three
phase
AC
power
supply
MCCB MC
MC
OFF ON
MC
T
PR
PX
*1
5m or less
*4
*4
*3
*2