CHINT 접촉기 NC1-2508/220V

모델 해석

모델 세그먼트	설명
NC1	제품 시리즈 코드; CHINT Electric NC1 series AC contactor, suitable for remote on/off control of AC circuits and frequent control of AC motors
25	Rated operating current class; rated operating current is 25A under AC-3 utilization category (400V에서)
8	보조 접점 구성, 0 평상시 열려 있음 + 8 평상시 닫혀 있음 (actually a 4-pole contactor with 2NO+2NC main contacts; auxiliary contacts need to be configured separately)
220다섯	Rated control voltage of the coil; 교류 220V, compatible with 50/60Hz frequency

핵심 기술 매개변수

매개변수 카테고리	특정 지수
정격 작동 전압 (우에)	Three-phase AC 690V (50/60헤르츠); Rated Insulation Voltage Ui = 800V
정격 작동 전류 (~ 안에)	25A at 400V under AC-3; 40A at 400V under AC-1; 16A at 690V under AC-3
활용 카테고리	AC-1 (non-inductive or slightly inductive loads), AC-3 (starting/running/breaking of squirrel-cage induction motors), AC-4 (frequent starting/reversing/braking of squirrel-cage induction motors)
주요 접점 구성	4-폴, 2아니요+2NC (2 평상시 열림 + 2 평상시 닫힘)
보조 연락처	Need separate configuration (예를 들어, AX series auxiliary contact sets); can be expanded to combinations like 2NO+2NC
코일 매개변수	Rated voltage AC 220V, 50/60헤르츠; Pick-up power approx. 370버지니아; Holding power approx. 45버지니아
기계적 수명	≥10 million cycles (무부하 작동)
전기적 수명	≥100,000 cycles under AC-3 (breaking at rated current)
보호 등급	IP20 (prevents finger access)
장착 방법	표준 35mm DIN 레일 장착 또는 나사 고정
규정 준수 표준	IEC/EN 60947-4-1, GB14048.4

III. 기능적 특징

Flexible Multi-Pole Configuration: 4-극 디자인 (2NO+2NC main contacts) adapts to various circuit control requirements, especially suitable for scenarios requiring bidirectional control or switching of the main circuit.
Wide Voltage Compatibility: The coil supports universal 50/60Hz frequency, adapts to power grid frequencies in different regions, and ensures stable and reliable control voltage.
Long Mechanical and Electrical Life: 기계적 수명은 최대 10 million cycles and electrical life of 100,000 cycles under AC-3, meeting the requirements of industrial scenarios with frequent start-stop operations.
모듈식 확장: Accessories such as auxiliary contact sets and mechanical interlock modules can be added to realize function expansion including signal feedback and reversible control.
Safe and Reliable Design: Adopts silver alloy contacts with strong anti-welding capability; the high-efficiency arc extinguishing system ensures short arcing distance during breaking, guaranteeing electrical safety.
High Versatility: Designed with reference to the Schneider LC1 series; can be matched with CHINT NR2 series thermal overload relays to form electromagnetic starters for overload protection.
적용범위
모터 제어: Can control motors up to 11kW (400V three-phase induction motor) under AC-3 category, suitable for frequent start-stop of equipment such as fans, water pumps and conveyors.
배전 시스템: Used for remote on/off control of circuits below AC 690V, such as control of non-inductive or slightly inductive loads (AC-1 category) like lighting systems and heating equipment.
산업 자동화: Serves as the core component of control circuits such as star-delta starters and reversible contactors, adapting to various motor control schemes including DOL (Direct-On-Line) starting and star-delta starting.
Building Electrical Engineering: Control circuits of equipment such as fans, air conditioners and water pumps in shopping malls, 사무실 건물, factory workshops and other places.
적합하지 않음: DC circuits, occasions with frequent reversing and large load inertia (AC-4 dedicated contactors are required), and heavy-duty circuits exceeding rated current.
선택 제안
부하 매칭:

모터 부하: Select according to motor power; 25A contactor is suitable for ≤11kW three-phase motors at 400V.

Power Distribution Load: Can carry 40A current under AC-1 category, suitable for lighting or heating loads with total power ≤17kW.

Control Voltage Confirmation: Ensure that the coil voltage (220다섯) matches the power supply of the control circuit to avoid coil burnout.
보조 접점 확장:

For signal feedback: Install AX-02 auxiliary contact set (2아니요).

For interlock control: Install mechanical interlock module (suitable for reversible control).

For alarm function: Install alarm contact module.

Protection Configuration: Use with NR2-25 series thermal overload relays with setting current 16-25A to achieve motor overload protection.
브랜드 교체 참조:

상표	교체 모델	핵심 차이점
슈나이더	LC1D25008M7 220V	더 높은 가격, same auxiliary contact configuration, slightly higher breaking capacity
지멘스	3RT6026-1AN20 220V	모듈형 디자인, compatible with Siemens automation systems, 더 높은 가격
맛있는	CJX2-2508 220V	Domestic product of the same grade, 일관된 매개변수, 높은 비용 성능

문제 해결

일반적인 결함	가능한 원인	솔루션
Coil not pulling in after power-on	1. Mismatched coil voltage or open circuit in control loop	1. Verify coil voltage and check control loop wiring
	2. 구운 코일	2. Measure coil resistance (대략. several hundred ohms under normal condition); replace if burned
	3. Jammed mechanical mechanism	3. Clean the interior of the contactor and check for jamming of springs and armature
장착 후 소음이 심함	1. Oil stain or rust on armature end face	1. Clean armature end face to remove oil stain and rust
	2. Broken shading ring	2. Replace shading ring or contactor body
	3. 낮은 코일 전압	3. Check control power supply voltage to ensure it is within 卤10% of the rated value
Overheating or welding of contacts	1. Load current exceeding rated value	1. Replace with contactor of larger capacity or reduce load
	2. Poor contact of contacts	2. Clean contacts and polish oxide layer; replace contacts if severely damaged
	3. Failure of arc extinguishing system	3. Check for damage to arc extinguishing cover and replace in time
Abnormal signal of auxiliary contacts	1. Poor contact of auxiliary contacts	1. Clean auxiliary contacts and check wiring
	2. Loose installation of auxiliary contact set	2. Reinstall auxiliary contact set and tighten screws
	3. Severe wear of contacts	3. Replace auxiliary contact set
Frequent coil burnout	1. Excessive fluctuation of control voltage	1. Install voltage stabilizer or surge protector
	2. Long-term coil energization (exceeding design life)	2. Optimize control loop to avoid long-term coil energization
	3. 높은 주변 온도	3. Improve ventilation and heat dissipation conditions to reduce ambient temperature

Ⅶ. 설치 및 유지 관리 참고 사항

설치 전, check that the contactor has no damage to appearance, no oxidation of coil and contacts, and the mechanical mechanism is flexible without jamming.
When installing on DIN rail, reserve ≥50mm heat dissipation space and avoid close installation with other heating elements.
배선 중, use wires suitable for 25A current for main circuit terminals (4mm² copper core cable is recommended) and tighten terminal screws (tightening torque 2.5N·m).
Use 1.5mm² copper core cable for control loop wiring to avoid excessive voltage drop due to insufficient wire diameter.
Conduct regular inspection every 3 개월:

Check contact wear; replace when contact thickness is less than 1mm.

Monitor coil temperature; normal operating temperature should be ≤80℃.

Check flexibility of mechanical mechanism and remove dust and oil stains.

After a fault occurs, cut off power supply first, troubleshoot and repair before putting into use; operation with fault is strictly prohibited.

Parameter Comparison Table of CHINT NC1 Series Contactors (9A/12A/25A/40A/65A/95A)

비교 차원	NC1-09	NC1-12	NC1-25	NC1-40	NC1-65	NC1-95
정격 작동 전류 (AC-3, 400다섯)	9에이	12에이	25에이	40에이	65에이	95에이
Suitable Three-Phase Motor Power (400다섯)	4kW	5.5kW	11kW	18.5kW	30kW	45kW
정격 작동 전류 (AC-1, 400다섯)	12에이	18에이	40에이	63에이	100에이	150에이
정격 절연 전압 (우이)	800다섯	800다섯	800다섯	800다섯	800다섯	800다섯
정격 작동 전압 (우에)	교류 690V	교류 690V	교류 690V	교류 690V	교류 690V	교류 690V
주요 접점 구성	3아니요 (3 평상시 열림)	3아니요	2아니요+2NC (4-폴)	3아니요	3아니요	3아니요
코일 전압 옵션	AC 24/36/110/220/380V	Same as left	Same as left	Same as left	Same as left	Same as left
코일 전압 옵션	DC 24/110V	Same as left	Same as left	Same as left	Same as left	Same as left
Coil Pick-up Power	대략. 70버지니아	대략. 85버지니아	대략. 370버지니아	대략. 500버지니아	대략. 650버지니아	대략. 800버지니아
Coil Holding Power	대략. 8버지니아	대략. 10버지니아	대략. 45버지니아	대략. 60버지니아	대략. 80버지니아	대략. 100버지니아
기계적 수명	≥10 million cycles	≥10 million cycles	≥10 million cycles	≥10 million cycles	≥10 million cycles	≥8 million cycles
전기적 수명 (AC-3)	≥100,000 cycles	≥100,000 cycles	≥100,000 cycles	≥100,000 cycles	≥100,000 cycles	≥80,000 cycles
보호 등급	IP20	IP20	IP20	IP20	IP20	IP20
장착 방법	35mm DIN rail/screw fixing	Same as left	Same as left	Same as left	Same as left	Same as left
Matching Thermal Overload Relay	NR2-11.5	NR2-11.5	NR2-25	NR2-40	NR2-65	NR2-95
일반적인 애플리케이션 시나리오	작은 팬, 슬리퍼, 조명 제어	컨베이어, small compressors	Central air conditioning fans, 물 펌프	대형 팬, 공기 압축기	사출 성형기, 파쇄기	Cooling towers, large motors

보충 선택 팁

Load Matching Priority: For motor loads, select according to rated current under AC-3; for power distribution/lighting loads, select according to rated current under AC-1. The load current shall be ≤80% of the contactor’s rated current to avoid overload.
코일 전압 선택: Prioritize voltage consistent with the control loop (예를 들어, 220다섯). DC coils are suitable for industrial scenarios with strong electromagnetic interference to avoid false pull-in.
보조 접점 확장: All specifications can be equipped with AX series auxiliary contact sets (2NO/2NC/1NO+1NC) to meet the needs of signal feedback and interlock control.
Reversible Control Configuration: Select 2 contactors of the same specification and install mechanical interlock module to prevent main circuit short circuit.