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  6. Voltage 4-phase Current 4-phase Protection Relay Tester 'RX4744/AS'

Voltage 4-phase Current 4-phase Protection Relay Tester 'RX4744/AS'

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RX4744A / RX4744AS

last updated:Apr 22, 2026

エヌエフ回路設計ブロック
エヌエフ回路設計ブロック
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More efficient relay testing! This single unit supports testing of 4 voltage elements and 4 current elements.

The protection relay tester "RX4744" has achieved testing of voltage and current with four elements each, which previously required multiple models, all in a single unit. Its compact and lightweight design makes it suitable for maintenance and inspection of core systems, as well as for testing protective functions related to mega solar, wind power, and cogeneration. To improve the efficiency of work in electrical equipment maintenance and the manufacturing of protection relays, it is equipped with various operating modes for individual and comprehensive testing, enhancing operability. By combining peripheral devices and software, an automatic relay testing system can be constructed. 【Features】 ■Equipped with 80A and 40A current ranges ■ Equipped with microcurrent output in the 400mA/5mA range ■ High accuracy in amplitude, phase, and frequency output ■ Built-in counter (milliseconds) allows for measurement of operating time ■ Rich operating modes for individual and comprehensive testing ■ Output switching function combined with a three-phase simulated circuit breaker to support comprehensive testing ■ Supports automation and efficiency of testing with protection relay testing software ■ Two selectable models to match the exam: [Basic] RX4744A [Function Expansion] RX4744AS *For more details, please refer to the PDF document or feel free to contact us.

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rx4744A_thumb.jpg

Voltage 4-phase Current 4-phase Protection Relay Tester 'RX4744/AS'

rx4744A_thumb.jpg
rx4744A_thumb.jpg
  • Related Link - https://www.nfcorp.co.jp/pro/p-test/rx/rx4744a/

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basic information

【Other Features】 - Lightweight and compact, making transportation and installation easy - Testing possible with just one unit - Easy to set up tests and collect test results - Four-phase voltage (up to 250V) and four-phase current (up to 20A) with simultaneous continuous output, output is insulated for each phase *For more details, please refer to the PDF document or feel free to contact us.

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Price range

P6

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Applications/Examples of results

【Purpose】 ■Development, manufacturing, maintenance, and inspection of digital relays *For more details, please refer to the PDF document or feel free to contact us.

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Voltage 4-phase Current 4-phase Protection Relay Tester 'RX4744A/AS'

Voltage 4-phase Current 4-phase Protection Relay Tester 'RX4744A/AS'

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Protection Relay Tester Catalog

Protection Relay Tester Catalog

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Voltage 2-phase Current 2-phase Protection Relay Tester 'RX47022'

Voltage 2-phase Current 2-phase Protection Relay Tester 'RX47022'

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エヌエフ回路設計ブロック

エヌエフ回路設計ブロック

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Our company develops four business areas centered around our unique technology: electronic measuring instruments, power supply equipment, electronic components, and custom application products. Group companies, centered around the NF circuit design block, collaborate to handle development, production, sales, and field services, flexibly responding to our customers' diverse needs across a wide range of fields. NF is derived from our name and represents our unique analog technology, exemplified by negative feedback technology. Since our founding, we have continually challenged ourselves to develop cutting-edge technologies. Moving forward, we aim to continue providing innovative and highly valuable "trusted products" and "products that bring joy" to our customers, and we aspire to remain a company that is always expected by our customers.

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