Chint TND1-1.5 Single-Phase AC Automatic Voltage Regulator

The Chint TND1 series is a classic single-phase high-precision automatic voltage regulator. The TND1-1.5 model has a rated capacity of 1.5kVA. Its core function is to stabilize the voltage of single-phase 220V AC power grids, preventing damage to electrical equipment caused by voltage fluctuations. It is widely used in scenarios such as households, สำนักงาน, small-scale industries, and laboratories, serving as a fundamental power accessory to ensure the reliable operation of equipment.

1. พารามิเตอร์ทางเทคนิคหลัก (Official Standard Values)

1. คุณสมบัติการทำงานหลัก
2. ความสามารถในการปรับแรงดันไฟฟ้าได้กว้าง: The input voltage range of the standard model covers 176V~264V, capable of handling low or high voltage issues in rural power grids, old residential areas, and remote regions. It is particularly suitable for scenarios with frequent voltage fluctuations.
3. High-Precision Regulated Output: The servo motor adjusts the position of the carbon brush in real time to quickly compensate for voltage deviations. The output voltage accuracy is controlled within ±1%~±2%, which can meet the needs of equipment sensitive to voltage stability, such as computers, เครื่องพิมพ์, เครื่องมือในห้องปฏิบัติการ, and medical devices.
4. Multiple Safety Protection: Integrated with four protection functions (แรงดันไฟฟ้าเกิน, แรงดันตก, โอเวอร์โหลด, และป้องกันการลัดวงจร). When grid voltage is abnormal or load malfunctions, it quickly cuts off the output to avoid equipment burnout. A built-in thermal protection device prevents the regulator itself from overheating damage.
5. Stable Voltage Regulation Without Power Interruption: Adopting a contact-type voltage regulation structure, there is no instantaneous power interruption during voltage adjustment, which will not cause restart of sensitive equipment such as computers and monitoring devices, ensuring work continuity.
6. Easy Operation and Maintenance: The panel is equipped with a power indicator (for working status) and a protection indicator (for fault prompt). Some models are equipped with a voltage display meter for intuitive monitoring of input/output voltage. With a simple structural design and no complex electronic components, later maintenance only requires cleaning the carbon brushes and wiring terminals.
7. Low Energy Consumption and Low Noise: The iron core is made of high-quality silicon steel sheets, and the coil windings are optimized. The efficiency is ≥90% under rated load, and the no-load loss is ≤30W. The servo motor runs smoothly with noise below 55dB, suitable for quiet environments such as homes and offices.

III. สถานการณ์การใช้งาน

1. Household Use: Used to protect household appliances such as refrigerators, เครื่องปรับอากาศ, ทีวี, เครื่องซักผ้า, and computers, avoiding equipment failures caused by voltage fluctuations (เช่น, burnout of air conditioner compressors, damage to TV screens).
2. Office Scenarios: Suitable for office equipment such as printers, เครื่องถ่ายเอกสาร, เซิร์ฟเวอร์, and monitoring devices, preventing printing interruptions, server downtime, and loss of monitoring recordings due to unstable voltage.
3. Small-Scale Commerce: Cash registers, ตู้แช่เย็น, and lighting equipment in convenience stores and small supermarkets; hair dryers and perm machines in barbershops, avoiding disruption to normal business operations caused by voltage fluctuations.
4. Laboratories/Medical Field: Small laboratory instruments, analytical equipment, blood pressure monitors, and ultrasonic instruments in medical clinics. High-precision voltage regulation ensures accurate measurement data of the equipment.
5. Small-Scale Industry: Front-end voltage regulation for equipment such as single-phase motors, ปั๊มน้ำขนาดเล็ก, and automatic control instruments, preventing motor burnout or control failure caused by voltage fluctuations.
6. คำแนะนำในการคัดเลือก (Core Reference for Sales)
7. โหลดหลักการจับคู่:

โหลดตัวต้านทาน (แสงสว่าง, กาต้มน้ำไฟฟ้า, เตาต้านทาน): Select the model directly according to the principle that the total load power ≤1.5kVA (ขอแนะนำให้จองก 10% ระยะขอบ, เช่น., load ≤1.35kVA).

โหลดอุปนัย (เครื่องปรับอากาศ, ตู้เย็น, มอเตอร์): Since the starting current is 3~7 times the rated current, select the model according to the principle that “rated power of load ×3” ≤1.5kVA, เช่น., inductive load ≤500VA (เช่น, the rated power of a 1HP air conditioner is about 750W, and the starting power is about 2250W, which exceeds 1.5kVA, so a larger capacity model such as TND1-3kVA should be selected).

โหลดแบบผสม (เช่น, คอมพิวเตอร์ + เครื่องพิมพ์ + small refrigerators): Calculate the total load according to the formula “power of resistive loads + power of inductive loads ×3” ≤1.5kVA.

2. Voltage Range Confirmation: First understand the grid voltage fluctuation range of the customer’s application scenario. The standard model (±20%) is suitable for most urban power grids. If the voltage fluctuation in the customer’s area exceeds ±20% (เช่น, lower than 176V or higher than 264V), recommend a customized wide-input-range voltage regulator.
3. Installation Environment Adaptability:

– Install indoors, หลีกเลี่ยงความชื้น, เต็มไปด้วยฝุ่น, และสภาพแวดล้อมของก๊าซที่มีฤทธิ์กัดกร่อน (moisture-proof measures are required for kitchens and bathrooms).

– Reserve ventilation space, with no obstacles within ≥10cm around the regulator, and avoid placing it close to heat sources (เช่น, radiators, เตาอบ).

4. Special Demand Recommendations:

– If the customer needs real-time voltage monitoring, recommend models with a digital display meter (some TND1-1.5 models can be equipped with input/output voltage display).

– If the customer’s equipment is sensitive to power outages (เช่น, เซิร์ฟเวอร์, monitoring devices), emphasize the “voltage regulation without instantaneous power interruption” การทำงาน, which is different from the switching-type voltage regulation of electronic regulated power supplies.

1. ประเด็นสำคัญในการติดตั้งและบำรุงรักษา (Key Points for Customer Explanation)
2. ข้อควรระวังในการติดตั้ง:

Single-phase 220V wiring: Connect the input terminals (L-in, N-in) to the grid power supply, and the output terminals (L-out, N-out) เพื่อโหลด. It is essential to distinguish between the neutral wire and the live wire, และห้ามเชื่อมต่อแบบย้อนกลับโดยเด็ดขาด; the grounding terminal (วิชาพลศึกษา) must be reliably grounded with a grounding resistance ≤4Ω.

Wire cross-sectional area for wiring: Select copper-core wires with a cross-sectional area ≥1.5mm² for input/output wiring, and tighten the wiring terminals to avoid heating caused by poor contact.

Overload use is strictly prohibited: Do not connect loads with a total power exceeding 1.5kVA, especially avoid long-term operation with inductive loads.

2. การบำรุงรักษารายวัน:

การทำความสะอาดเป็นประจำ: Clean the regulator shell and heat dissipation holes every 3~6 months to avoid dust accumulation affecting heat dissipation.

Carbon brush inspection: After 1~2 years of use, open the shell to check the wear condition of the carbon brushes. If the carbon brushes are severely worn (remaining length <5มม), replace them in a timely manner (original Chint accessories are available).

Fault handling: If the protection indicator light is on, first cut off the power supply, check whether the load is overloaded or short-circuited, or whether the grid voltage is abnormal, and restart after troubleshooting; if tripping occurs frequently, check the internal wiring of the regulator or contact after-sales service for testing.

1. ข้อดีของผลิตภัณฑ์
2. Chint Brand Guarantee: As a leading enterprise in domestic low-voltage electrical appliances, the product has passed 3C certification, with reliable quality and a nationwide after-sales service network (national warranty), providing customers with more peace of mind.
3. ความคุ้มค่าสูง: The 1.5kVA capacity is suitable for most small-load scenarios, with an affordable price. Compared with imported brands, it has a more competitive price advantage, making it suitable for bulk procurement (เช่น, residential property management, small enterprises).
4. Stability and Durability: The mature servo motor + carbon brush structure features a low failure rate. The normal service life can reach 5~8 years, with low later maintenance costs.