What is SK-R1-SCR1-CD-F8

SK-R1-SCR1-CD-F8 is a Converter SCR Assembly Kit for Rockwell Allen-Bradley PowerFlex 750 Series Frame 8-10 variable frequency drives.

Core Information

Equipamento aplicável: PowerFlex 750 Série (including PowerFlex 755 HIHP), suitable for Frame 8-10 high-power frames.

Especificações Elétricas: 400–480V input, responsible for the rectifier-side thyristor assembly and drive configuration.

Form & Doença: Complete spare part kit, original factory packaging (commonly surplus/new condition).

Related Models: Other F8-suffix parts in the same series include fan kit (SK-R1-FAN1-F8), IGBT gate driver board (SK-R1-IG1-E395F370), fuse kit, etc., which together form the power module.

Differences from Other Components

SK-R1-SCR1-CD-F8: Rectifier-side SCR assembly kit (core power rectification).

SK-R1-IG1-E395F370: Inverter-side IGBT gate driver board.

SK-R1-FAN1-F8: Cooling fan kit.

Rockwell Allen-Bradley PowerFlex 750 Série

The Rockwell Allen-Bradley PowerFlex 750 Series is a family of high-performance, modular AC variable frequency drives developed by Rockwell Automation, featuring high power rating, high flexibility, and high reliability. It is widely used in heavy industrial applications such as metallurgy, mining, cimento, power generation, guindastes, and material handling.

1. Series Composition (Core Models)

PowerFlex 753: General Purpose

Poder: 0.75 ~ 250 kW / 1 ~ 350 HP

Tensão: 200V ~ 480V

Controlar: V/Hz, sensorless vector, basic flux vector

Aplicativo: Standard fans, bombas, conveyors and other general loads

PowerFlex 755: Alto desempenho (your queried Frame 8-10 falls into this category)

Poder: 7.5 ~ 3640 kW / 10 ~ 6000 HP

Tensão: 400/480V, 600/690V

Controlar: TotalFORCE advanced vector, permanent magnet motor control, servo-grade positioning, regenerative power

Aplicativo: High-power drives, rolling mills, guinchos, high-speed paper machines, test benches and other high-end applications

PowerFlex 755T (TL/TR/TM): Premium Special Purpose

755TL: Active Front End (AFE), harmonic mitigation, high power factor

755TR: Regenerative braking unit, feeds braking energy back to the grid

755MT: Common DC bus system, multi-drive parallel connection for energy-saving networking

2. Frame Size vs. Power Rating

The Frame 8-10 you are focused on belongs to the ultra-high power range:

3. Key Technical Features

TotalFORCE Control: Adaptive torque control, full torque at zero speed, high-precision positioning

Modular Slot Architecture: Control board, I/O, comunicação, safety, encoder cards hot-swappable

DeviceLogix Embedded Logic: Built-in mini PLC functionality to reduce external relays

Predictive Diagnostics: Monitors lifespan of fans, capacitores, relays for early fault warnings

Funções de segurança: STO (Torque seguro desativado) SIL2/3, SSM Safe Speed Monitoring

Comunicação: EtherNet/IP standard; optional DeviceNet, ControlNet, Profibus

4. Key Spare Parts for Frame 8-10 (Summary of Your Queries)

Rectifier Side

SK-R1-SCR1-CD-F8: SCR Rectifier Assembly Kit

SK-R1-CBPFUSE3-F8: DC bus fuse kit

Inverter Side

SK-R1-IG1-E395F370: IGBT Gate Driver Board (395A/370A)

FF1400R121P4: Infineon PrimePACK 3 IGBT Module (1400A/1200V)

DC Bus

CD138-400V-7900μF: Jianghai DC bus electrolytic capacitor

Cooling System

SK-R1-FAN1-F8: Inverter cooling fan kit

Estrutura & Acessórios

SK-R1-CVRP1-F8: Power unit cover

20-750-POD1-F8: Power module mounting base

5. Weight Overview (Your Key Parameters)

SK-R1-SCR1-CD-F8: aprox.. 3.6 kg

FF1400R121P4: aprox.. 1.2 kg

SK-R1-IG1-E395F370: aprox.. 0.45 kg

SK-R1-FAN1-F8: aprox.. 1.2 kg

CD138-400V-7900μF: aprox.. 1.8 kg

6. Aplicações Típicas

Mining: Hoists, belt conveyors, moinhos de bolas

Metallurgy: Rolling mills, coilers, straighteners

Cement: Kiln main drives, roller presses, fãs

Poder: Induced draft fans, feed pumps, desulfurization systems

Papel: Rewinders, calenders, high-speed paper machines

Testing: Motor back-to-back test benches, new energy dynamometers