Chint NKB8-32/8A-32A/AC220V제어 및 보호 스위칭 장치

Chint NKB8-32/8A-32A/AC220V is a Control and Protective Switching Device (CPS) that integrates the functions of a 접촉기, 회로 차단기, and motor protector. It is specifically designed for power systems with an AC frequency of 50Hz and a rated voltage up to 690V, and is particularly suitable for the control and protection of 3~15kW motors. 핵심정보 및 지원요령은 다음과 같습니다.:

1. 핵심 기능 및 기술 매개변수
2. Protection Module (CTU-1D32D)Chint NXR 시리즈 열 과부하 계전기 가격

과부하 보호: The setting range is 8~32A (corresponding to 3~15kW motors with 400V/AC-43 loads), supporting the adjustment of inverse time curves to avoid frequent misoperations.

Short-circuit instantaneous protection: Instantaneous tripping at 16 정격 전류의 배 (16즉) with a response time of <0.1 초, and the breaking capacity reaches 50kA (400다섯).

Intelligent protection functionsCHINT 회로 차단기 가격:

– 위상 손실 보호: Triggers tripping within 5 초 (default value) when a phase loss is detected.

– Three-phase imbalance protection: The threshold can be set (10%~100%), and it acts within 10 seconds when the default imbalance degree of 35% is reached.

– Locked rotor/blocking protection: Locked rotor protection is for the starting process (5~9Ie, 2-second delay), and blocking protection is for abnormalities during operation (5~9Ie, 2-second delay).

– Under-current/under-voltage protection: The under-current protection can be set to 20%~80% of the rated current (80% 기본적으로), and the under-voltage protection is 70%~90% of the rated voltage (80% 기본적으로).

2. Power Base Module (PBU1T32)CHINT 접촉기 가격

정격전류: 32에이, suitable for 3~15kW motors under 400V/AC-43 working conditions.

Control power supply: AC220V is directly controlled through A1/A2 terminals, or independently powered through A3/A4 terminals.

차단 용량: The short-circuit breaking capacity under AC-43 working conditions is 50kA, meeting industrial-grade requirements.

3. 모듈형 디자인CHINT 서지 보호기 가격

– Adopts a split structure, with the transformer module and main control unit installed separately, supporting 35mm guide rail or screw fixation, saving space in the control cabinet.

– Expandable communication functions (such as ModBus-RTU protocol) to realize remote monitoring.

1. Installation and Operation
2. 배선사양

주회로: The terminal blocks are suitable for 4~16mm² wires, with L1/L2/L3 as the incoming ends and T1/T2/T3 as the outgoing ends.

제어 회로: Use 0.75~1.5mm² wires, A1/A2 are connected to the AC220V control power supply, and A3/A4 can be optionally equipped with independent power supply.

Grounding requirements: 안정적인 접지 보장, with a grounding resistance ≤4Ω.

2. 매개변수 설정

– Enter the menu through the panel buttons (Ent/∧/∨/Esc) to adjust parameters such as overload current and delay time. 예를 들어, set the overload protection current to 1.1 모터 정격 전류의 곱, and the delay time matches the starting characteristics of the load.

– Supports manual reset (panel buttons) and remote reset (external signal input), and automatically locks the current value after a fault for analysis.

3. 상태 모니터링

LED indicators:(visually display the status of power supply, 작업, 초과 적재, 전압, 등.).

Data display: Cyclically display the average value of three-phase current and the real-time current of A/B/C phases, with an error of <±2%.

III. 적용 시나리오 및 선택 제안

1. 일반적인 응용 분야

Industrial field: Protection of three-phase asynchronous motors such as fans, 물 펌프, and cranes, especially suitable for loads with frequent starting (컨베이어 벨트와 같은).

상업용 건물: Energy saving and protection of air conditioning compressors and elevator motors, which can be connected to the building automation system through communication interfaces.

Alternative solution: Replace the traditional thermal relay + contactor combination, reducing cabinet space and improving protection accuracy.

2. 선택 포인트

전력 매칭: Select the corresponding model according to the rated current of the motor. CTU-1D32D is suitable for 3~15kW (400다섯) motors to avoid reduced protection sensitivity due to over-selection.

환경 적응성: A heat dissipation module is required for high-temperature environments (>50℃), and a cabinet with IP54 protection level is recommended for high-humidity environments.

인증 요구 사항: For export to the North American market, it is necessary to confirm whether it has passed UL certification (you can contact Chint customer service for the latest certification information).

1. 유지 관리 및 문제 해결
2. 일일 유지 관리

– Clean the housing and terminal blocks quarterly, and check whether the terminals are loose.

– Use a multimeter to detect whether the voltage of the control circuit is stable (AC220V±10%) to avoid misoperation caused by voltage fluctuations.

2. 일반적인 오류 문제 해결

False tripping: Check if the load is overloaded for a short time, or adjust the inverse time curve to extend the action time.

No display: Confirm whether the control power supply is normal, and check the voltage of A1/A2 terminals and whether the fuse is blown.

Communication interruption: Check if the RS485 wiring is correct and whether the baud rate setting is consistent with the upper computer.

3. 공식 지원

– Users in North America can purchase through local distributors or obtain customized solutions via Whatsapp: 0086-13811255435.

1. Compliance and Certification

Domestic standards: Complies with GB14048.9 “저전압 개폐 장치 및 제어 장치” CQC 인증을 통과했습니다..

International certification: It is recommended that export users confirm the certification requirements of the target market in advance (such as UL, CE), and can apply for customized certification versions through Chint’s official channels.

요약: With its integrated design, high-precision protection, 유연한 구성, NKB8-32/8A-32A/AC220V has become the preferred solution for motor control and protection in industrial and commercial fields. When selecting and using, a comprehensive evaluation should be made in combination with load characteristics, environmental conditions, and certification requirements to achieve the best protection effect.

Chint CTU1-32 motor protector is the core component of the NKB8 series control and protection switching devices, specially providing comprehensive protection for motors. The following is its key information and application guidelines:

1. 핵심 기능 및 기술 매개변수
2. 보호 기능

과부하 보호: Supports definite time and inverse time actions, with the overload current setting range of 3~12A (corresponding to 1.1~5.5kW motors with 400V/AC-43 loads). The inverse time curve can be adjusted according to load characteristics to avoid frequent misoperations.

Short-circuit instantaneous protection: Instantaneous tripping at 16 정격 전류의 배 (16즉) with a response time of <0.1 초, effectively preventing the expansion of short-circuit faults.

Phase loss/open-phase protection: Triggers tripping within 5 초 (default value) after detecting a power failure in any phase, avoiding motor burnout due to phase loss.

Three-phase imbalance protection: The imbalance threshold can be set (10%~100%), and it acts within 10 seconds when the default imbalance degree of 35% is reached.

Locked rotor/blocking protection: Locked rotor protection is for the starting process (5~9 times the rated current, 2-second delay), and blocking protection is for abnormalities during operation (5~9 times the rated current, 2-second delay).

Under-current/under-voltage protection: The under-current protection can be set to 20%~80% of the rated current (80% 기본적으로), and the under-voltage protection is 70%~90% of the rated voltage (80% 기본적으로).

2. 전기적 매개변수

정격전류: 32에이, suitable for 3~15kW motors under 400V/AC-43 working conditions.

차단 용량: The short-circuit breaking capacity under AC-43 working conditions reaches 50kA (400다섯), meeting industrial-grade short-circuit protection requirements.

Control power supply: Powered by AC220V, which can be directly controlled through A1/A2 terminals or independently powered through A3/A4 terminals.

3. 모듈형 디자인

– Adopts a split structure, with the transformer module and main control unit installed separately, supporting 35mm guide rail or screw fixation, saving space in the control cabinet.

– Expandable communication functions (such as ModBus-RTU protocol) to realize remote monitoring and data collection.

1. Installation and Operation
2. 설치 요구 사항

환경 조건: Operating temperature -30℃~70℃, 습기 <90%, avoiding strong electromagnetic interference and corrosive gases.

배선사양: The main circuit terminals are suitable for 4~16mm² wires, and the control circuit uses 0.75~1.5mm² wires, ensuring reliable grounding.

설치방법: The transformer module is directly connected in series to the main circuit of the motor, and the main control unit is fixed on the control cabinet panel through a buckle, supporting embedded or rail installation.

2. 매개변수 설정

– Enter the menu through the panel buttons (Ent/∧/∨/Esc) to adjust parameters such as overload current, 지연 시간, and protection threshold. 예를 들어, set the overload protection current to 1.1 모터 정격 전류의 곱, and the delay time matches the starting characteristics of the load.

– Supports manual reset (panel buttons) and remote reset (external signal input), and automatically locks the current value after a fault for analysis.

3. 상태 모니터링

LED indicators: The status of power supply, 작업, 초과 적재, 전압, 등., is visually displayed through different color LEDs.

Data display: Cyclically display the average value of three-phase current and the real-time current of A/B/C phases, with an error of <±2%.

III. 적용 시나리오 및 선택 제안

1. 일반적인 응용 분야

산업용 장비: Protection of three-phase asynchronous motors such as fans, 물 펌프, and cranes, especially suitable for loads with frequent starting (컨베이어 벨트와 같은).

상업용 건물: Energy saving and protection of air conditioning compressors and elevator motors, which can be connected to the building automation system through communication interfaces.

Alternative solution: Can replace the traditional thermal relay + contactor combination, reducing cabinet space and improving protection accuracy.

2. 선택 포인트

전력 매칭: Select the corresponding model according to the rated current of the motor. CTU1-32 is suitable for 3~15kW (400다섯) motors to avoid reduced protection sensitivity due to over-selection.

환경 적응성: A heat dissipation module is required for high-temperature environments (>50℃), and a cabinet with IP54 protection level is recommended for high-humidity environments.

인증 요구 사항: For export to the North American market, it is necessary to confirm whether it has passed UL certification (you can contact Chint customer service for the latest certification information).

1. 유지 관리 및 문제 해결
2. 일일 유지 관리

– Clean the housing and terminal blocks quarterly, and check whether the terminals are loose.

– Use a multimeter to detect whether the voltage of the control circuit is stable (AC220V±10%) to avoid misoperation caused by voltage fluctuations.

2. 일반적인 오류 문제 해결

False tripping: Check if the load is overloaded for a short time, or adjust the inverse time curve to extend the action time.

No display: Confirm whether the control power supply is normal, and check the voltage of A1/A2 terminals and whether the fuse is blown.

Communication interruption: Check if the RS485 wiring is correct and whether the baud rate setting is consistent with the upper computer.

3. 공식 지원

– Users in North America can obtain customized solutions via Whatsapp: 0086-13811255435.

1. Compliance and Certification

Domestic standards: Complies with GB14048.9 “저전압 개폐 장치 및 제어 장치” CQC 인증을 통과했습니다..

International certification: It is recommended that export users confirm the certification requirements of the target market in advance (such as UL, CE), and can apply for customized certification versions through Chint’s official channels.

요약: With its modular design, high-precision protection, 유연한 구성, the CTU1-32 motor protector has become the preferred solution for motor protection in industrial and commercial fields. When selecting and using, a comprehensive evaluation should be made in combination with load characteristics, environmental conditions, and certification requirements to achieve the best protection effect.