Chint NU6-II G40/440-3P/20KA 서지 보호 장치 (SPD)

Chint NU6-II G40/440-3P/20KA is a Class II Test Surge Protective Device (SPD) primarily designed for lightning protection and transient overvoltage protection in three-phase power distribution systems. It features a maximum discharge current of 40kA, a nominal discharge current of 20kA, a continuous operating voltage of 440V, a 3-pole configuration, and a voltage protection level of 2.0kV. This device complies with the standards of GB/T 18802.11 그리고 IEC 61643-11, and has obtained certifications such as CQC and CE.

핵심사양

기능 및 응용

핵심 기능: Discharges transient energy such as lightning strikes and operational overvoltages, suppresses overvoltages, and protects downstream power distribution equipment and loads from damage caused by electrical surges.

일반적인 응용 분야: Lightning protection at the power supply input of three-phase power distribution incoming cabinets, 바닥 배전함, UPS front ends, frequency converters/servo drives, and other industrial control equipment. It can be used in combination with upstream Class I SPDs and downstream Class III SPDs to establish a cascaded protection system.

Selection and Installation Guidelines

1. 응용 시나리오: Suitable for three-phase 380V power distribution systems, especially occasions with significant line voltage fluctuations and a demand for higher Uc, such as industrial power grids and outdoor distribution boxes.
2. 백업 보호: It is recommended to equip with a Type C or Type D circuit breaker/fuse rated at 16-25A to prevent short circuits caused by SPD failures.
3. 배선 요구 사항: The cross-sectional area of connecting wires should be ≤16mm². The length of phase wires and ground wires should be as short as possible (≤0.5m) to reduce the impact of line impedance on protection performance.
4. 장착 방법: 35mm 표준 DIN 레일 장착, 점령 3 modular positions (approximately 54mm in width).

Price Reference and Procurement Tips

The retail price is approximately 180-280 단위당 인민폐 (as of December 2025, excluding tax and installation costs). 대량 구매의 경우 (≥10 units), the price can drop to 150-220 단위당 인민폐. Models with remote alarm (F형) have a price increase of 10-15%.

조달 채널: Chint Electric Mall and authorized distributors. It is crucial to verify the model suffix and certification marks to avoid non-standard or refurbished products.

Recommendations for Surge Protective Devices Similar to Chint NU6-II G40/440-3P/20KA

1. Recommendations for International Brands
2. 슈나이더 일렉트릭

iPRU SS Series: A9LM20403 (SS iPRU 40r 3P)

명세서: 입력=20kA, 아이맥스=40kA, Uc=350V, 3피, Voltage Protection Level ≤2.0kV

특징: Intelligent design, 결함 표시, and remote monitoring capabilities

가격 참고: 약 280-380 단위당 인민폐

IST Series: IST 40 3피

명세서: 입력=20kA, 아이맥스=40kA, Uc=340V, 3피

특징: Fixed design, 컴팩트한 사이즈, ideal for space-constrained environments

가격 참고: 약 250-350 단위당 인민폐

2. 씨줄

OVR T2 Series: 9AKK108466A4410 (OVR T2 3L 40-440 P TS QS)

명세서: 입력=20kA, 아이맥스=40kA, Uc=440V, 3피, Voltage Protection Level ≤1.8kV

특징: “TS” indicates with auxiliary contact; “QS” indicates pluggable for easy maintenance

가격 참고: 약 300-400 단위당 인민폐

3. 피닉스컨택트

VAL-MS Series: 2817741 (VAL-MS 440/20/3+0)

명세서: 입력=20kA, 아이맥스=40kA, Uc=440V, 3피 (no neutral line), Voltage Protection Level ≤2.2kV

특징: “Hot-swappable” 모듈식 디자인, enabling replacement without power cutoff, 중요한 장비에 적합

가격 참고: 약 350-450 단위당 인민폐

4. DEHN

DG M TNC Series: DG M TNC 440

명세서: 입력=20kA, Uc=440V, 3피, Short-circuit Withstand Capacity 25kA

특징: Compact design with 3-module width, suitable for TNC systems

가격 참고: 약 320-420 단위당 인민폐

DEHNguard SE CI Series: DEHNguard SE CI 440

명세서: 입력=20kA, Uc=440V, integrated backup fuse

특징: Integration of overvoltage protection and backup fuse, reducing installation space

가격 참고: 약 380-480 단위당 인민폐

5. OBO

V20 Series: V20-C/3-440V (주문번호: 5094710)

명세서: 입력=20kA, 아이맥스=40kA, Uc=440V, 3피

특징: Modular design with optional FS (remote signaling) 기능

가격 참고: 약 300-400 단위당 인민폐

1. Recommendations for Domestic Brands
2. DELIXI Electric

CDYN Series: CDYN-II 40kA 3P 440V YX

명세서: 입력=20kA, 아이맥스=40kA, Uc=440V, 3피, Voltage Protection Level ≤2.0kV

특징: “YX” indicates with remote signaling function for remote fault indication

가격 참고: 약 160-260 단위당 인민폐

DZ47sY 시리즈: DZ47sY-II 20kA 3P 440V

명세서: In=10kA, Imax=20kA, Uc=440V, 3피

특징: Terminal power distribution type, 비용 효율적, suitable for household and small-scale industrial applications

가격 참고: 약 80-150 단위당 인민폐

2. Zhongguang Lightning Protection

ZGZNSD Series: ZGZNSD20-F

명세서: 입력=20kA, integrated monitoring module, supporting remote monitoring

특징: Intelligent design with lightning current and leakage current monitoring, suitable for critical systems

가격 참고: 약 220-320 단위당 인민폐

3. Other Models in Chint Series

NU6-II Series (Non-G Series)

NU6-II 40kA/440V 3P: 동일한 사양, the absence of “G” indicates no remote alarm

가격 참고: 약 180-280 단위당 인민폐

NXU-II Series (쿤룬 시리즈)

NXU-II G 40kA/440V 3P: Similar positioning and performance to the NU6-II G Series

가격 참고: 약 170-270 단위당 인민폐

III. Comparison Table of Product Specifications

메모: Some parameters are estimated values; refer to official manuals for actual specifications.

1. 선택 제안
2. Selection Based on Budget

경제적 (<200 인민폐): DELIXI DZ47sY-II Series, Standard Chint Models

비용 효율적 (200-300 인민폐): Chint G Series, DELIXI CDYN Series, Schneider IST Series

High-End (>300 인민폐): International Brands such as ABB, 피닉스컨택트, and DEHN

2. Selection Based on Functional Requirements

Remote Monitoring Needed: Choose models with suffixes like “에프”/”YX”/”FS” (예를 들어, NU6-II G40/440-3P/20KA-F)

Frequent Maintenance Needed: Choose models with “QS” (pluggable) 기능 (예를 들어, ABB OVR T2 Series)

Space Constraints: Consider compact designs (예를 들어, DEHN DG M Series, only 3-module width)

3. Compatibility Considerations

백업 보호: All recommended products should be equipped with Type C or Type D circuit breakers/fuses rated at 16-25A

시스템 호환성: Confirm compatibility with your power distribution system type (TN-S/TN-C/TT)

장착 방법: All products support 35mm standard DIN rail mountin。

1. Summary of Recommendations
2. Best Cost-Effectiveness: Chint NU6-II Series (same-brand alternative) or DELIXI CDYN Series (equivalent performance at a lower price)
3. First Choice for High-End Quality: ABB OVR T2 Series (slightly better protection level) or Phoenix Contact VAL-MS Series (convenient maintenance)
4. Special Requirements:

Remote Monitoring: Schneider iPRU Series or models with “에프” 접미사

Wind Power/Photovoltaic Systems: DEHN DG M TNC 440 or OBO V20 Series

It is advisable to make a selection based on the actual application scenario, 예산, and maintenance requirements, and purchase through official channels to ensure product quality and after-sales service. For more accurate selection, you can provide specific parameters of your power distribution system and protection requirements for further analysis.