NDFY-II Series Current Transformer Secondary Circuit Load Tester-Wuhan Nanxing Electric Power Technology Co., Ltd.

Phone: 400-027-8938

Mobile: 133 9714 9829

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NDFY-II Series Current Transformer Secondary Circuit Load Tester

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Instrument transformer, relay, and pressure relief valve testing series

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NDFY-II 系列电流互感器二次回路负载测试仪

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■Features and Benefits

It can perform fully automatic measurements for three-phase three-wire, three-phase four-wire, and single-phase systems.

It features an engineering‑plastic enclosure that is robust and durable, effectively ensuring the safety of test personnel and the system.

The instrument features automatic range switching to ensure measurement accuracy.

Adopts an electronic circuit design combined with… DSP The technology ensures excellent test stability and strong anti-interference capability.

Once the measurements are complete, the system automatically calculates all relevant parameters, facilitating customer analysis and testing.

Features a large-screen Chinese character waveform display. , All operations are guided by Chinese-character menus. ; The data supports non-volatile storage and retrieval. , It can transmit data online with a computer.

Adopting large capacity 7.2V/11Ah Powered by a lithium battery, it has no impact on the test circuit, thereby preventing protective shutdowns. It can also be used in field conditions where no external power supply is available.

During secondary‑side load testing, a clamp‑on ammeter is used to sample the current, eliminating the need to disconnect the secondary circuit. This enables live, on‑line measurements without interrupting power. The instrument automatically switches measurement ranges; during the test, it adjusts to the appropriate range based on the measured value, ensuring both measurement accuracy and adequate display resolution.

Working hours can be as long as 24 Hours; measurements can be taken while charging.

It comes with a lightweight charger for convenient measurements, and when the battery is low, you can connect an external charger to take readings.

The instrument is compact and lightweight.

Can store 480 Group measurement data can be retained for ten years after power loss.

Large-screen display with a Chinese interface, featuring RS-232 Communication interface

II. Main Technical Specifications

1. Environmental Conditions

– Temperature: -10°C to 40°C

— Relative humidity: <85% (25°C)

– Altitude: <2500m

— External disturbances: No severe vibrations, no strong electromagnetic fields.

2. Main technical specifications of the instrument during secondary voltage drop testing

⑴. Measurement range: Ratio error: 0.001% to 19.99% Angle difference: 0.01’ to 599’

⑵. Resolution: Ratio error: 0.001% Angular difference: 0.01’

⑶. Basic Instrument Error

——DX=±(2% × X+2% × Y)±2 characters;

——DY=±( Y × 2%+ X × 2% × 34.38) ± 2 characters.

Two characters—quantization error of the instrument

⑷. Voltmeter accuracy: 0.5%

⑸. Scope of Work

— Voltage: (50–120) V

⑹. Instrument indicates the actuation value (indicates an error)

— Error: The ratio error exceeds 20% or the phase angle error exceeds 600′.

— Voltage: Voltage < 2.0 V.

3、 Main Technical Specifications of the Instrument During PT Secondary Load Testing

⑴. PT Secondary Burden Test

— Admittance measurement range: 0.1 mS–50.0 mS

— Admittance measurement accuracy:

— Secondary voltage (50 V–120 V)

DX=±(2% × X+2% × Y)±2 characters

DY=±(2% × X+2% × Y)±2 characters

Two characters—quantization error of the instrument

⑵. Voltmeter movement: 0.5%

4. Main Technical Specifications of the Instrument During CT Secondary Burden Testing

— Impedance measurement range: 0.1 Ω–50.0 Ω

— Impedance measurement accuracy:

DX=±(2% × X+2% × Y)±2 characters

DY=±(2% × X+2% × Y)±2 characters

Two characters—quantization error of the instrument

Ammeter movement: 1%

Keywords:

NDFY-II Series Current Transformer Secondary Circuit Load Tester

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Provide a reasonable quotation.

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Provide professional technical support

We guarantee that a technical specialist will respond to any technical questions you may have within 24 hours.

Provide detailed information

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