0-54346
0-54346 (Reliance Electric / ABB)
Product Overview
0-54346, also marked as 0-54346-NS, is a Static Rheostat Board designed for Reliance Electric AutoMax and MaxPak DC drive systems. It performs current limiting during startup and excitation circuit regulation. This legacy power board has been discontinued by the original manufacturer, and only NOS, refurbished or used units are available on the market.
Description
Model Definition
0-54346 is the base part number for static rheostat board. The suffix -NS stands for standard version without special revision. No direct OEM replacement is released, and cross-compatible equivalent parts are not available.
Technical Specifications
Form factor is standard 3U PCB with overall dimensions 248 × 171 mm and weight around 0.7 kg. It is rated for 230/460/575 VAC DC drives. Main components include high-power wirewound resistors, power diodes, filter capacitors and thermal control elements. Operating temperature ranges from 0 °C to 55 °C. It adopts standard 3U rack mounting with edge connector.
Interfaces & Communication
Equipped with 3U edge connector for installation on AutoMax and MaxPak rack backplane. External screw terminals are provided for excitation circuit and main power circuit wiring. This is a pure hardware power regulation board with no external communication ports.
Key Features
Provides inrush current limiting during power-up to protect rectifier bridges and power semiconductors. Regulates excitation current to stabilize the rotational speed of DC motors. Built with industrial-grade power components to withstand frequent start-stop operations. Standard 3U form factor fits original drive enclosures perfectly. Robust construction ensures long-term stable operation under harsh industrial conditions.
Application
Compatible with AutoMax and MaxPak series DC drives covering power range from 50 HP to 2000 HP. Widely deployed in steel, paper, mining, crane, conveyor and machine tool industries. It acts as a core component for startup current limiting and excitation control in DC drive systems.
Compatibility
Fits AutoMax DC Drives and MaxPak DC Drives with 230/460/575 VAC input voltage, applicable to DC drives between 50 HP and 2000 HP.
Critical Notes
This is a power regulation board, functionally different from memory boards and rectifier suppressor boards. Since no direct replacement is available, refurbished units or original board repair are the common solutions. Stock quantity is limited, so the delivery lead time is relatively long.
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