Nidec Powerdrive MD2S, Руководство по установке

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36
L1
H
P
P - 80
P + 60*
Ø13
L - 28
L
PARAMETER-SETTING INTERFACE AND OPTIONS
Powerdrive MD2S Installation guide
4972 en - 2017.08 / d
5.6.2 - Braking resistors
• Before installing a braking resistor, make sure
that its presence does not constitute a fire hazard.
• A braking resistor must be mounted outside the
drive cabinet, as close as possible. Ensure that it is
incorporated in a grounded ventilated metal case, to
avoid any direct contact.
• The braking resistor must be wired in series with a
thermal relay calibrated to the resistor rms current. When
the relay trips, the drive must immediately stop and be
disconnected from the AC supply.
• Specific information warning of the presence of high
temperature must be affixed to the resistor.
• The braking resistor must be installed so that it
does not damage neighboring components with its heat
dissipation.
• Dimensions
* becomes D + 80 from
RF-MD-37500-5 upwards
Protection: IP13
Braking phases occur when energy is sent back from the
motor to the drive. Without an additional device, the maximum
power that can be absorbed by a Powerdrive MD2S is limited
to its internal losses. If the application calls for significant
braking power (inertia slowdown with short deceleration
times, fast braking, etc.) a device must be added to the
standard product consisting of an add-on braking module and
an external resistor.
Several MD2TF braking modules can be combined to
increase the braking capacity. They must not be mounted in
parallel on a single resistor: use as many resistors as there
are braking modules.
5.6.1 - Braking modules
MD2TF braking modules consist of an IGBT transistor and a
control circuit.
Rating T TH
Braking transistor
reference
MD2TF 400 MD2THF 330
Peak current (A) 400 330
Continuous current (A) 250 110
Minimum value of the
associated resistor (Ω)
1.8 3.5
Braking transistors are only mounted in the factory.
Leroy-Somer offers MD2TF units on their own or combined
with a thermal relay. This must be set to the stated current for
the resistor associated with it. See table below.
• Braking resistor characteristics:
Type
Electrical characteristics Dimensions (mm)
Weight
(kg)
Ohmic
value (
Ω
)
Thermal
power
(kW)
Rating Braking transistor kit Thermal relay
Peak
power
(kW)
rms
current
(A)
L L1 D H
RF-MD-27500-10 10 27.5 T MD2TF400-27500 48 to 65A 51 52 860 890 480 690 66
RF-MD-37500-5 5 37.5 T MD2TF400-37500 80 to 104A 100 87 960 1140 380 1150 77
RF-MD-55000-5 5 55 T MD2TF400-55000 95 to 125A 100 105 960 1140 540 1150 105
RF-MD-75000-4 3.5 75
T MD2TF400-75000 120 to 160A 145 146
1080 1260 680 1150 145
TH MD2THF330-75000 120 to 160A 345 146
RF-MD-110000-3 2.35 110 T MD2TF400-110000 160 to 220A 220 216 960 1140 740 1520 200
5.6 - Braking modules and associated resistors