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  5. Testing Equipment and Devices
  6. 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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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 4 elements and current 4 elements in a single unit, which previously required multiple models. Its compact and lightweight design allows it to be used for maintenance and inspection of core systems, as well as for testing protection functions related to mega solar, wind power, and cogeneration. To improve the efficiency of work at electrical equipment maintenance sites 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, it is possible to build an automated relay testing system. 【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 ■ Supports comprehensive testing by combining with a three-phase simulated circuit breaker with output switching function ■ 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.

    Testing Equipment and Devices
rx4744A_thumb.jpg

Voltage 4-phase Current 4-phase Protection Relay Tester 'RX4744A/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 can be performed 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 for each phase, with output insulated for each phase *For more details, please refer to the PDF document or feel free to contact us.

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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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Company information

エヌエフ回路設計ブロック

エヌエフ回路設計ブロック

Electronic Components and Semiconductors

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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 company name and is representative of 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 aspire to continue providing innovative and highly valuable "trusted products" and "delightful products" for our customers, and we wish to remain a company that is always expected by our customers.

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