NDDS Series Analog Circuit Breaker Device-Wuhan Nanxing Electric Power Technology Co., Ltd.

Phone: 400-027-8938

Mobile: 133 9714 9829

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NDDS Series Analog Circuit Breaker Device

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Secondary Protection Testing Series

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NDDS 系列模拟断路器装置

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Product Details

■Product Overview

The circuit breaker simulator is primarily used for full‑set testing of relay protection devices and, in other test applications, serves as a substitute for the actual circuit breaker. It functions as an equivalent device during system‑level functional tests of relay protection and automatic control equipment that include switching operations. With accurate and reliable operation and an unlimited number of actuations, it significantly enhances the precision and completeness of tests, minimizes the number of actual circuit breaker operations, and extends its service life. This simulator can be integrated with relay protection test sets or operated independently. In particular, when newly commissioned substations or power plants have high‑voltage circuit breakers that have not yet been properly adjusted or do not yet have DC power applied, using this simulator for relay protection testing eliminates external influences, thereby shortening commissioning time and improving testing efficiency. For manufacturers and research institutions, employing this device yields even greater productivity. Other similar applications may be addressed on a case‑by‑case basis, depending on specific circumstances.

Key Features
Provides a set of fully isolated, adjustable DC power supplies with meter displays showing the regulated voltage.
It also provides six‑pole closing and tripping coils.
Equipped with manual make-and-break functionality;
The resistance of the closing and tripping coils can be adjusted in multiple steps.
The closing and opening output times can be selected across multiple time periods.
It comes with multiple pairs of dry-contact outputs for switch‑on and switch‑off positions.
Equipped with multiple pairs of open/close pulse output dry contacts.
The microcontroller-based control system supports intelligent upgrades, meeting a variety of requirements.
The high-performance hardware platform employs industrial‑grade components throughout, with core parts sourced from military‑grade specifications, ensuring superior device quality.

■ Product Specifications

Operating supply voltage: AC 220 V ±10%, 50 Hz; operating current less than 0.5 A.
Trip‑initiation nodes: The circuit breaker provides 12 pairs of independent position‑output contacts, divided into two groups that correspond to the circuit breaker’s trip coils.
Closing and opening operation voltage: DC 40–250 V, adjustable.
Closing and opening times: adjustable between 10 ms and 1000 ms, with an accuracy of no more than ±5 ms.
Closing and opening currents (coil resistance): ∞Ω, 880Ω, 440Ω, 220Ω, 110Ω, 44Ω
Manual closing and opening: Operated by pressing the “Manual Close” and “Manual Open” buttons on the touch screen.

At this time, no current flows through the trip and close coils of the circuit breaker simulator.

Output node: Contact rating: DC 220 V / 0.5 A, AC 220 V / 5 A.
Trip and close pulse output: Provides three sets of 500-millisecond digital output contacts.
The closing and opening currents are 0 A, 0.25 A, 0.5 A, 1 A, 2 A, and 5 A, respectively; when the trip‑close pulse is 110 V, the corresponding closing and tripping currents are 0 A, 0.125 A, 0.25 A, 0.5 A, 1 A, and 2.5 A, respectively.

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NDDS Series Analog Circuit Breaker Device

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