20S SCR Bus Supplies
PowerFlex 20S SCR Bus Supply
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Allen-Bradley PowerFlex 20S SCR Bus Supplies provide standard product offerings for the common DC bus application.
Standards Compliance
PowerFlex SCR DC Bus Supply conforms to the following:
| Conformity to: | Approvals & Standards | |
| UL Listed | ü | UL 508C |
| c-UL Listed | ü | CAN/CSA-C22.2 No. 14-M91 |
| CE Compliant ¬ | ü | EN61800-3, EN50178 |
| ¬ SCR Bus Supply will meet the essential requirements for CE compliance provided an externally mounted line reactor and HF filter are used. | ||
Description
PowerFlex SCR Bus Supplies are single-direction power converters for the front-end of common DC bus drive systems. The supplies convert incoming three-phase AC line voltage to a common DC bus voltage and current. The SCR Bus Supply offers the following features:
- Six-pulse, full-wave, three-phase SCR bridge rectifier unit.
- Built-in AC line and DC bus fuses (400 & 600A units). Rectifier branch fuses, snubber circuit and DC bus feedback fuses (1,000A units). All fuses feature trip indicator switches.
- Overtemperature sensor located in the heat sink for thermal protection of the SCR bridge rectifier.
- RC snubber circuit for dampening and linearity of overvoltages.
- MOV snubber circuit for surge protection.
- Precharge Board with enable contactor.
- Stand alone and master-slave configurations (1,000A units only). A maximum of four slave units may be connected in parallel.
Catalog Number Explanation
To interpret the meaning of a catalog number, match the values of the catalog number code in positions a, b, c, etc. with the tables labeled a, b, c, etc. below.
| 20S | D | 400 | N | E | N | |||||
| a | b | c | d | e | f |
| a | |
| Product | |
| Code | Type |
| 20S | SCR Bus Supply T |
| T SCR Bus Supply available through Drive Systems only. | |
| b | |||
| Voltage Rating | |||
| Code | Input Voltage | Ph. | DC Output |
| D | 400/480V AC | 3 | 540…650V DC |
| F | 600/690V AC | 3 | 675…930V DC |
| c | |
| Rating | |
| Code | Output |
| 400 | 400A, 400/480V |
| 600 | 600A, 400/480V |
| 1K0 | 1000A, 400/480/600/690V |
| d | ||
| Enclosure | ||
| Code | Rating | Conformal Coating |
| N | Open/IP00 | No |
| e | ||
| Documentation & Shipping Carton | ||
| Code | User Manual | Carton |
| E | English | Yes |
| f | |
| Configuration | |
| Code | Type |
| N | Stand Alone |
| M | Master (1000A Only) ¬ |
| S | Slave (1000A Only) ¬ |
| ¬ PowerFlex SCR Bus Supply units with Master and Slave configurations are available for 480 & 690 volts, but only with a 1000A output current rating. | |
Product Selection
| PowerFlex SCR Bus Supplies | ||
| Voltage | Description | Cat. No. |
| 400/480V | 400A, Stand Alone | 20SD400NEN |
| 600A, Stand Alone | 20SD600NEN | |
| 1000A, Stand Alone | 20SD1K0NEN | |
| 1000A, Master | 20SD1K0NEM | |
| 1000A, Slave | 20SD1K0NES | |
| 600/690V | 1000A, Stand Alone | 20SF1K0NEN |
| 1000A, Master | 20SF1K0NEM | |
| 1000A, Slave | 20SF1K0NES | |
HF Filter
When this filter is used, the HF emission limits for class A, group 2 (EN55011) in the second environment (industrial supply network) according to the product standard EN61800-3 are met, and the Bus Supply fulfills CE conformity.
| Description | Cat. No. |
| HF Filter, 690V | 20S-RFC |
AC Line Reactors
A minimum reactance is required to limit peak currents in the AC line and the bridge circuit. This can be accomplished with a matched supply transformer or by adding a line reactor to ensure the requested minimum voltage drop over the total line impedance. The minimum voltage drop must be 3%. Line Reactor selection is based on the DC Amps sum of the connected drives and the supply transformer used.
Specifications
| Input Ratings | ||||
| Description/Cat.No. | 20SD400 | 20SD600 | 20SD1K0 | 20SF1K0 |
| Nominal AC Input Voltage: | 400/480V | 600/690V | ||
| Frequency: | 47-63 Hz | 47-63 Hz | ||
| Operational AC Input Voltage: | 187-528V | 269-759V | ||
| Input Current (Max. Cont. RMS): | 355 | 521 | 843 | 843 |
| Input kVA at Max. Cont. RMS Amps: | 246/295 | 361/433 | 584/700 | 876/1007 |
| Output Ratings | ||||
| DC Bus Amps | ||||
| 300 | 500 | 800 | 800 | |
| 450 | 750 | 1200 | 1200 | |
| Max. Continuous DC Bus Amps without Overload: | 400 | 600 | 1000 | 1000 |
| Power Dissipation - Watts at Max. Continuous Amps: | 1200 | 1600 | 2700 | 2800 |
| DC Bus Voltage: | AC Input | Nominal | Maximum | |
| 400V | 540V | 750V | ||
| 480V | 650V | 750V | ||
| 600V | 810V | 1080V | ||
| 690V | 930V | 1080V | ||
| Specifications Common to All SCR Bus Supply Units | |
| Voltage Tolerance: | –10% of minimum, +10% of maximum |
| Frequency Tolerance: | 47-63 Hz |
| Displacement Power Factor: | 0.92 lagging (entire load range) |
| Efficiency: | 99.5% at rated amps, nominal line volts. |
| Line Transients: | up to 6000 volts peak per IEEE C62.41-1991 |
| Maximum Short Circuit Current Rating: | 85 kA |
| Cooling: | Forced ventilation cooled by tangential blower below heat sink. |
| 200 VA | |
| 600 m3/h | |
| Control Input Specifications | |
| Enable Contactor Coil: | Single-Phase 115V AC, 30 VA (pickup), 4.5 VA (hold) |
| Blower Current Consumption: | Single-Phase 115V AC, 50/60 Hz, 1A |
| Control Output Specifications | |
| Heat Sink Temperature Sensor: | Sensor trips if heat sink temperature exceeds maximum temperature. |
| Resistive Rating: 15A at 125V AC, 10A at 250V AC, 7A at 24V DC | |
| Inductive Rating: 10A at 125V AC, 6A at 250V AC | |
| Fuse Trip Indication Micro Switches F1-F11, NC Contact Output Rating (max.): | Resistive Rating: 10A at 30 to 250V AC, 8A at 30V DC |
| Inductive Rating: L/R=25ms, 10A at 30 to 250V AC | |
| Enable Contactor K1, NC Contact Output Rating (max.): | Resistive Rating: 10A at 24 to 230V AC, 3A at 30V DC |
| Inductive Rating: L2.2A at 24 to 230V AC | |
| Permitted Max. Capacitance for Connection to the DC Bus Supply: | This is the total DC Bus capacitance sum of the permitted drives to connect. |
| Approvals and Standards Compliance | |
| The Bus Supply is designed to meet the following specifications: | NFPA 70 - US National Electrical Code NEMA ICS 3.1 - Safety standards for Construction and Guide for Selection, Installation and Operation of Adjustable Speed Drive Systems. NEMA 250 - Enclosures for Electrical Equipment IEC 146 - International Electrical Code. |
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UL and cUL Listed to UL508C and CAN/CSA-C22.2 |
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Marked for all applicable European Directives EMC Directive (89/336/EEC) |
| Emissions: EN 61800-3 Adjustable Speed electrical power drives systems Part 3 |
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| Immunity: EN 61800-3 Second Environment, Restricted Distribution |
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| Low Voltage Directive (73/23/EEC) EN 50178 Electronic Equipment for use in Power Installations |
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| Environmental Specifications | |
| Altitude: | 1000 m (3300 ft.) max. without derating. Above 1000 m the derating for the output current is 1% per 100 m (330 ft). |
| Ambient Operating Temperature without Derating: Open Type/IP00: |
0 to 40°C (32 to 104°F) Above 40°C up to 50°C (122°F) maximum temperature the output Amps must be derated by 1% per °C (1.8% per °F). |
| Storage Temperature (all): | –40 to 70°C (–40 to 158°F) |
| Relative Humidity: | 5 to 95% non-condensing |
| Shock: | 15G peak for 11ms duration (±1.0 ms) |
| Vibration: | 0.152 mm (0.006 in.) displacement, 1G peak |
Bus Supply Mounting Dimensions
The dimensions and weights provided in the following drawing are for estimating purposes only. Contact your local Rockwell Automation Sales Office if certified drawings are required.
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| Unit Type | A | B | C | D | Weight |
| 400A | 535 (21.1) | 404 (15.9) | 580 (22.8) | 276 (10.9) | 30 kg (66 lb) |
| 600A | 740 (29.1) | 490 (19.3) | 785 (30.9) | 276 (10.9) | 43 kg (95 lb) |
| 1000A | 740 (29.1) | 490 (19.3) | 785 (30.9) | 276 (10.9) | 67 kg (147 lb) |
| Dimensions are in millimeters and (inches) | |||||