Chint TND1-1.5 منظم جهد كهربائي أوتوماتيكي AC أحادي الطور

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, offices, small-scale industries, and laboratories, serving as a fundamental power accessory to ensure the reliable operation of equipment.

1. Core Technical Parameters (Official Standard Values)

1. Core Functional Features
2. Wide Voltage Adaptability: 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, printers, laboratory instruments, and medical devices.
4. Multiple Safety Protection: Integrated with four protection functions (overvoltage, undervoltage, overload, and short-circuit protection). 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.

ثالثا. سيناريوهات التطبيق

1. Household Use: Used to protect household appliances such as refrigerators, air conditioners, TVs, washing machines, and computers, avoiding equipment failures caused by voltage fluctuations (على سبيل المثال, burnout of air conditioner compressors, damage to TV screens).
2. Office Scenarios: Suitable for office equipment such as printers, copiers, servers, and monitoring devices, preventing printing interruptions, server downtime, and loss of monitoring recordings due to unstable voltage.
3. Small-Scale Commerce: Cash registers, refrigerated cabinets, 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, small water pumps, and automatic control instruments, preventing motor burnout or control failure caused by voltage fluctuations.
6. توصيات الاختيار (Core Reference for Sales)
7. Load Matching Principles:

Resistive loads (lighting, electric kettles, resistance furnaces): Select the model directly according to the principle that the total load power ≤1.5kVA (it is recommended to reserve a 10% هامِش, أي., load ≤1.35kVA).

Inductive loads (air conditioners, refrigerators, motors): 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, أي., inductive load ≤500VA (على سبيل المثال, 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).

Mixed loads (على سبيل المثال, computers + printers + 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% (على سبيل المثال, lower than 176V or higher than 264V), recommend a customized wide-input-range voltage regulator.
3. Installation Environment Adaptability:

– Install indoors, avoiding humid, dusty, and corrosive gas environments (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 (على سبيل المثال, radiators, ovens).

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 (على سبيل المثال, servers, monitoring devices), emphasize the “voltage regulation without instantaneous power interruption” function, which is different from the switching-type voltage regulation of electronic regulated power supplies.

1. Installation and Maintenance Key Points (Key Points for Customer Explanation)
2. Installation Precautions:

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) to the load. It is essential to distinguish between the neutral wire and the live wire, and reverse connection is strictly prohibited; the grounding terminal (PE) 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. Daily Maintenance:

Regular cleaning: 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 <5مم), 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. Product Advantages
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. High Cost-Effectiveness: 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 (على سبيل المثال, 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.