Mitsubishi Electronics FR-F700 instruction manual Fr-Bu-Hk, Fr-Br-Hk, Connection example

Name (type) Specifications, Structure, etc.

￿The brake unit and resistor unit are options that will fully exhibit the regenerative braking capability of the inverter and are always used as a set.

￿There are six different brake units as in the following table, from which make selection according to the necessary braking torque and deceleration time.

￿The brake unit is equipped with a seven-segment LED that displays the duty (%ED) and alarm.

￿Brake unit selection table

￿%ED at short-time rating when braking torque is 100%

		Motor Capacity		5.5kW	7.5kW	11kW	15kW	18.5kW	22kW	30kW	37kW	45kW	55kW
		Inverter	200V	5.5K	7.5K	11K	15K	18.5K	22K	30K	37K	45KK	55K
			400V	5.5K	7.5K	11K	15K	18.5K	22K	30K	37K	45KK	55K
	2	FR-BU-15K		80	40	15	10	------	------	------	------	------	------
unit	0	FR-BU-30K	%ED	------	------	65	30	25	15	10	------	------	------
	0
Brake	V	FR-BU-55K		------	------	------	------	90	60	30	20	15	10
	0	FR-BU-H30K	%ED	80------	------	65	30	25	15	10	------------	------	------
	4	FR-BU-H15K			40	15	10	------	------	------		------	------
	0
	V	FR-BU-H55K		------	------	------	------	90	60	30	20	15	10

￿Braking torque (%) at short-time rating when 10%ED is 15s

		Motor Capacity		5.5kW	7.5kW	11kW	15kW	18.5kW	22kW	30kW	37kW	45kW	55kW
		Inverter	200V	5.5K	7.5K	11K	15K	18.5K	22K	30K	37K	45KK	55K
			400V	5.5K	7.5K	11K	15K	18.5K	22K	30K	37K	45KK	55K
	2	FR-BU-15K	Braking	280	200	120	100	80	70	------	------	------	------
unit	0	FR-BU-30K	Torque	------	------	260	180	160	130	100	80	70	------	Brake unit
	V	FR-BU-55K	(%)	------	------	------	------	300	250	180	150	120	100
Brake	0													Resistor unit
	0	FR-BU-H30K	Torque	------	------	260	180	160	130	100	80	70	------
	4	FR-BU-H15K	Braking	280	200	120	100	80	70	------	------	------	------
	0		(%)
	V	FR-BU-H55K		------	------	------	------	300	250	180	150	120	100

Brake unit	￿ Brake unit and resistor unit combinations and used cables
						(Note) 1. The temperature rise of the resistor unit is about a
			Brake Unit Type	Resistor Unit Type	Cable (P/+-P/+, N/--
FR-BU-(H)￿￿K						maximum of 100°C. Therefore, use heat-resistant wires
					N/-, P/+-P, PR-PR)
Resistor unit		2	FR-BU-15K	FR-BR-15K	3.5mm2	(such as glass wires).
FR-BR-(H)￿￿K		0	FR-BU-30K	FR-BR-30K	5.5mm2
		0
		V	FR-BU-55K	FR-BR-55K	14mm2
		4	FR-BU-H15K	FR-BR-H15K	3.5mm2
		0	FR-BU-H30K	FR-BR-H30K	3.5mm2
		0	FR-BU-H55K	FR-BR-H55K	5.5mm2
		V

Use the wires of the above recommended size or larger.

￿ Connection example							*3
						ON	Inverter
								FR-BU		FR-BR
						OFF	P/+	P/+	P/+	P
			T *2
						MC
							N/-	N/-	PR	PR
				MC
					FR-BR		Within		Within
							5m		5m
MCCB	MC
		R/L1	U	Motor	P	TH1	Inverter
Three-phase AC
		S/L2	V	IM					FR-BU	FR-BR
power supply					PR
							Twist			Twist
		T/L3	W			TH2
							P/+		P/+ P/+	P
		Inverter			FR-BU		N/-		N/- PR	PR
					PR	HA
							Within 10m			Within 10m
			P/+	*1	P/+	HB
			N/−		N/−	HC
							*3. Minimize the cable length between the inverter and brake
				*3			unit and the resistor unit and brake unit. Use a twisted
							cable when the wiring length exceeds 5m. (If twisted
				5m or less
							wires are used, the distance should be within 10m.) Use
*1. Connect the inverter terminals (P/+, N/-) and brake unit (FR-BU (H)) terminals so that their
							the wires of the above recommended size or larger.
terminal signals match with each other.
(Incorrect connection will damage the inverter.)
*2. When the power supply is 400V class, install a step-down transformer.

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