CHINT Contactor NC1-2508/220V

1. تفسير النموذج

1. المعلمات التقنية الأساسية

ثالثا. الميزات الوظيفية

1. Flexible Multi-Pole Configuration: 4-pole design (2NO+2NC main contacts) adapts to various circuit control requirements, especially suitable for scenarios requiring bidirectional control or switching of the main circuit.
2. 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.
3. Long Mechanical and Electrical Life: Mechanical life up to 10 million cycles and electrical life of 100,000 cycles under AC-3, meeting the requirements of industrial scenarios with frequent start-stop operations.
4. Modular Expansion: Accessories such as auxiliary contact sets and mechanical interlock modules can be added to realize function expansion including signal feedback and reversible control.
5. 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.
6. 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.
7. Application Scope
8. التحكم في المحركات: 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.
9. Power Distribution System: 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.
10. الأتمتة الصناعية: 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.
11. Building Electrical Engineering: Control circuits of equipment such as fans, air conditioners and water pumps in shopping malls, مباني المكاتب, factory workshops and other places.
12. Not Suitable For: DC circuits, occasions with frequent reversing and large load inertia (AC-4 dedicated contactors are required), and heavy-duty circuits exceeding rated current.
13. اقتراحات الاختيار
14. Load Matching:

تحميل المحرك: 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.

2. Control Voltage Confirmation: Ensure that the coil voltage (220V) matches the power supply of the control circuit to avoid coil burnout.
3. Auxiliary Contact Expansion:

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

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

For alarm function: Install alarm contact module.

4. Protection Configuration: Use with NR2-25 series thermal overload relays with setting current 16-25A to achieve motor overload protection.
5. Brand Replacement Reference:

1. استكشاف الأخطاء وإصلاحها

سابعا. Installation and Maintenance Notes

1. قبل التثبيت, check that the contactor has no damage to appearance, no oxidation of coil and contacts, and the mechanical mechanism is flexible without jamming.
2. When installing on DIN rail, reserve ≥50mm heat dissipation space and avoid close installation with other heating elements.
3. During wiring, 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).
4. Use 1.5mm² copper core cable for control loop wiring to avoid excessive voltage drop due to insufficient wire diameter.
5. Conduct regular inspection every 3 شهور:

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.

6. 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)

Supplementary Selection Tips

1. 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.
2. Coil Voltage Selection: Prioritize voltage consistent with the control loop (على سبيل المثال, 220V). DC coils are suitable for industrial scenarios with strong electromagnetic interference to avoid false pull-in.
3. Auxiliary Contact Expansion: 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.
4. Reversible Control Configuration: Select 2 contactors of the same specification and install mechanical interlock module to prevent main circuit short circuit.