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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 | |||||
| W | D | H | H1 | D1 | W1 | ||||||
| 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 | ||
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