Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Wiring Connection of stand-alone option units
FR-D700 SC EC 3 - 37
3.6.3 Connection of a brake unit FR-BU2
When connecting a brake unit to improve the brake capability at deceleration, make connection
as shown below.
Connection example with the GRZG type discharging resistor
If the control contacts are only specified for 230V control power you must install a transformer
when using a 400V power supply.
Connect the inverter terminals (P/+, N/
−
) and brake unit terminals so that their terminal
signals match with each other. (Incorrect connection will damage the inverter.)
The wiring distance between the inverter, brake unit and resistor unit should be within 5m.
If twisted wires are used, the distance should be within 10m.
If the transistors in the brake unit should become faulty, the resistor can be unusually hot,
causing a fire. Therefore, install a magnetic contactor on the inverters input side to configure
a circuit so that a current is shut off in case of fault.
Refer to FR-BU2 manual for connection method of discharging resistor.
I002077E
Fig. 3-29: Connection with the brake unit FR-BU2
Brake Unit Discharging Resistor External Thermal Relay
FR-BU2-1.5K GZG 300W-50
Ω
(one) TH-N20CXHZKP-1.3A
FR-BU2-7.5K GRZG 200-10
Ω
(six in series) TH-N20CXHZKP-3.6A
FR-BU2-15K GRZG 300-5
Ω
(eight in series) on request
Tab. 3-20: Recommended external relay
Fig. 3-30:
Connecting the thermal relay
I001458E
U
V
W
P/+
N/–
R/L1
S/L2
T/L3
PR
N/-
BUE
SD
P/+
A
B
C
FR-BU2
MC
MCCB
MC
MC
OCR
R R
ON
3-phase AC
power supply
OFF
Inverter
≤
5m
M
3~
Motor
T
OCR-
contact
External
thermal
relay
GRZG type
discharging resistor
To the brake unit
terminal P/+
To a resistor