Mitsubishi Electric FR-V540-1.5K to 55K Specifications download pdf (Page 12)

348

n VARIABLE FREQUENCY DRIVES

E700 Series Plug-In Options

Model Number Description Stocked Item

FR-PU07 Alpha-Numeric multi-language keypad S

FR-PU07BB-L

Battery powered Alpha-Numeric multi-language

keypad

FR-CB20

Keypad extension cable S

SC-FRPC Serial communications cable S

FR-ABR-

K External brake resistor S

FR-RJ45-HUB4 Serial Network Hub - 2 Stations -

FR-RJ45-HUB10 Serial Network Hub - 8 Stations -

FR-RJ45-TR Terminating Resistor For FR-RJ45-HUB -

E700 Dynamic Braking

All Mitsubishi Electric VFD’s have some inherent braking capability. During controlled deceleration, motor regenerative losses are

dissipated in the motor, wire, and VFD circuitry. The built-in DC injection braking allows for low speed braking and stopping.

When the above capabilities are inadequate for an application, it is necessary to add a power transistor brake unit and resistor unit in

series across the DC bus. Motor regeneration causes the DC bus voltage to increase, and when the voltage exceeds a specified threshold,

the transistor turns on to pass current through the resistor. Motor kinetic energy is converted to heat energy. VFD overcurrent and

overvoltage protective circuits are active at all times, and will fault-trip the VFD if the brake size is inadequate.

Two main factors must be considered when sizing the brake, the effective duty cycle (%ED) and the short time duty rating. The

effective duty cycle is increased when an external resistor is added. It is preferable to profile the effective duty cycle of the units of time.

With this information, the short time duty is known and the %ED can be calculated, as shown in the below example.

%ED = Braking time / total time for complete operating cycle *100

Example: Complete cycle is:

5 sec: Acceleration time to reach set speed

60 sec: Run time at set speed

3 sec: Deceleration time to come to a complete stop

12 sec: Time period motor remains stopped

%ED = 3 / (5 + 60 + 3 + 12) x 100 = 3.6%

The tables shown assume 100% brake torque, when brake torque is represented by its percentage to the rated torque of the applied motor.

Torque (kg.m) = 974 x Power (kW) / Speed (rpm).

E700 Series External Options

240VAC Dynamic Braking Resistor at 100% Braking Torque

480VAC Dynamic Braking Resistor at 100% Braking Torque

Note: _ _ represents drive kW rating

Model Number Description Stocked Item

FR-A7NC E KIT CC-Link Network Option S

FR-A7ND E KIT DeviceNet Network Option S

FR-A7NP E KIT Profibus-DP Network Option S

FR-A7NL E KIT LonWorks Network Option S

FR-A7AX E KIT Additional 16-bit Digital Input S

FR-A7AY E KIT Additional Analog & Digital Output S

FR-A7AR E KIT Additional Relay Output S

FR-E7TR

Multidrop for Serial

Communication

Resistor Kit Model

Number

Weight

Resistance

(Ohms)

Continuous

Permissible

Power

(W)

Motor

(Hp)

Drive Model

Stocked

Item

D710W &

D720(S)

% ED

FR-ABR-0.4K 0.2 (0.5) 200 60 1/2 025 10% S

FR-ABR-0.75K 0.4 (0.9) 100 80 1 042 10% S

FR-ABR-2.2K 0.5 (1.1) 60 120 2 & 3 070 / 100 10% S

FR-ABR-3.7K 0.8 (1.8) 40 155 5 165 10% S

FR-ABR-5.5K 1.3 (2.9) 25 185 7 1/2 238 10% S

FR-ABR-7.5K 2.2 (4.9) 20 340 10 318 10% S

FR-ABR-11K 3.4 (7.5) 13 560 15 450 6% S

FR-ABR-15K

(2 resistors in parallel)

2.4 (5.3) x 2 9 (18 / 2) 805 20 580 6% S

Resistor Kit Model

Number

Weight

Resistance

(Ohms)

Continuous

Permissible

Power

(W)

Motor

(Hp)

Drive Model

Stocked

Item

D740 % ED

FR-ABR-H0.4K 0.2 (0.5) 1200 45 1/2 012 10% S

FR-ABR-H0.75K 0.2 (0.5) 700 75 1 022 10% S

FR-ABR-H1.5K 0.4 (0.9) 350 115 2 036 10% S

FR-ABR-H2.2K 0.5 (1.1) 250 120 3 050 10% S

FR-ABR-H3.7K 0.8 (1.8) 150 155 5 080 10% S

FR-ABR-H5.5K 1.3 (2.9) 110 185 7 1/2 120 10% S

FR-ABR-H7.5K 2.2 (4.9) 75 340 10 160 10% S

FR-ABR-H11K 3.4 (7.5) 52 530 15 230 6% S

FR-ABR-H15K

(2 resistors in parallel)

2.4 (5.3) x 2 36 (18 x 2) 870 20 295 6% S

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 61 62

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Mitsubishi Electric FR-V540-1.5K to 55K Specifications Page 12

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