The power resistor unit in the PRU series is a type of resistor cabinet which is made up of wire wound resistors. It is suitable for the dynamic braking circuit of the transducer of the high-power, strong current braking equipment, testing equipment, elevator and crane. The working voltage of the routine product is below 1200V DC and the rated power ranges from 20KW to 200KW.

Technical Indications

1. Rated power range: 30kW-200kW

2. Operating voltage range: <1200V

3. Rated resistance range: 0.5kR-100kR

4. Electric strength: AC 3KV 50Hz 5s

5. IP Grade: IP00/IP23

6. Vibration: 0.5g

7. Range of temperature excursion: ≤400ppm/℃

8. Material of the current carrier: 0Cr25AL5

9. Advantage: High-power

10. Disadvantage: Relatively poor vibration resistance

11. It is applied in elevator, lifting high-power brake circuit and the simulated load test

Outline & Mounting Dimension (Unit:mm)

Type	Power (KW)	Dimension(mm)						Terminal	Gross weigth (kg)	Cable(m㎡)	Combination
Type	Power (KW)	W	D	H	H1	D1	W1	Terminal	Gross weigth (kg)	Cable(m㎡)	Combination
	30	700	500	1100	1185	342	615	M6	73.4	16	12*2. 5kW
	40	700	500	1100	1185	342	615	M6	87	25	16*2. 5kW
	50	700	500	1500	1585	342	615	M6	100	25	20*2. 5kW
	60	700	500	1500	1585	342	615	M6	114	35	24*2. 5kW
	70	700	500	1800	1885	342	615	M6	127	35	28*2. 5kW
	80	700	500	1800	1885	342	615	M6	138	50	32*2. 5kW
	90	700	500	2000	2085	342	615	M6	155	50	36*2. 5kW
	100	700	500	2000	2085	342	615	M6	165	50	40*2. 5kW
	200	1400	500	2000	2085	342	615	M6	331	75	2*100kW

Wiring Diagram for Inverter System

Recommended brake assembly matching specification

Inverter		Braking Unit		Braking resistor
Voltage(V)	Motor(KW)	Model	Quantity(PCS)	Recommed resistor value	Resisitor specification	Quantity(PCS)
220V	0.75KW	Built-in		80W200Ω	80W200Ω	1
	1.5KW	Built-in		200W100Ω	200W100Ω	1
	2.2KW	Built-in		300W70Ω	300W70Ω	1
	3.7KW	Built-in		400W40Ω	400W40Ω	1
380V	0.75KW	Built-in		80W750Ω	80W750Ω	1
	1.5KW	Built-in		200W400Ω	200W400Ω	1
	2.2KW	Built-in		300W250Ω	300W250Ω	1
	3.7KW	Built-in		400W150Ω	400W150Ω	1
	5.5KW	Built-in		600W100Ω	600W100Ω	1
	7.5KW	Built-in		800W75Ω	800W75Ω	1
	11KW	Built-in		1000W50Ω	1000W50Ω	1
	15KW	Built-in		1500W40Ω	1500W40Ω	1
	18.5KW	4030	1	2500W35Ω	2500W35Ω	1
	22KW	4030	1	3000W27.2Ω	3000W27.2Ω	1
	30KW	4030	1	5000W19.2Ω	2500W38.4Ω	2
	37KW	4045	1	6000W16Ω	2000W48Ω	3
	45KW	4045	2	9600W13.6Ω	2500W54.4Ω	4
	55KW	4030	2	12000W10Ω	2000W60Ω	6
	75KW	4045	2	19200W6.8Ω	2500W54.4Ω	8
				Braking Resistor Box		Quantity(PCS)
	90KW	4030	3	9600W20Ω		3
	100KW	4220	1	9600W20Ω		3
	132-160KW	4220	1	40KW3.4Ω		1
	185-220KW	4220	1	60KW3.2Ω		1
	250-315KW	4220	2	40KW4.5Ω		2
	315-600KW	4220	3	60KW3Ω		3