Customers running TECO VFDs (TECO VFD series such as JNI, K, etc.) most often ask one thing: "what does the code on the screen mean?" We ranked the high-frequency alarms by how often they show up, and paired each with on-site troubleshooting steps you can follow directly. Bookmark this page—next time a fault pops up, don't rush to call service; you can clear more than half of them yourself.
2026/10/14 WUXI-TECO
When reading the TECO VFD selection manual, many people get stuck on the two letters ND / HD—same power, yet the ND-rated and HD-rated models differ in both price and load capacity. The TECO VFD ND and HD difference is essentially the "overload rating." Choose wrong and you either get frequent OL trips or overspend. This article explains it in one read.
2026/10/14 WUXI-TECO
TECO inverters provide multiple V/f curve selections. The default F0 or F1 is suitable for most general-purpose loads. When the load characteristics deviate from the default curve—for example, a constant-torque load that requires higher torque at low speed—it is necessary to switch to the corresponding curve or manually adjust the torque boost parameter.
2026/09/18 WUXI-TECO
For TECO inverters, the acceleration time parameter codes are Bn-01 (Acceleration Time 1) and Bn-03 (Acceleration Time 2); the corresponding deceleration times are Bn-02 and Bn-04. Some series also use 00-09 as Acceleration Time 1. The setting range is 0.1–3600.0 s, and the factory default is usually 10.0 s.
2026/09/18 WUXI-TECO
Complete guide to troubleshooting high-voltage motor cooling system failures. Covers temperature anomalies, water/air cooling checks, leak & blockage fixes, and daily maintenance to prevent overheating.
2026/09/04 WUXI-TECO
The most commonly used material in permanent magnet motors today is Neodymium Iron Boron (NdFeB). It has a very high energy product, which allows for strong magnetic fields, making motors smaller and more powerful. Ferrite permanent magnets are cheaper, but their magnetic performance is lower, so they are often used in low‑power or cost‑sensitive applications.
2026/08/15 WUXI-TECO
Traditional induction motors need to draw current from the power grid to generate a magnetic field. This current is called "excitation current" and it consumes electrical energy without doing useful work. In contrast, a permanent magnet motor has its own built-in permanent magnets on the rotor, so the magnetic field is provided by the magnets and no excitation current is required.
2026/08/14 WUXI-TECO
A frequency converter consists of four main parts: rectifier, DC link (intermediate DC circuit), inverter, and control circuit. The rectifier converts the mains AC into DC; the DC link filters and stores energy; the inverter, under the command of the control circuit, converts the DC back into AC with adjustable frequency and voltage for the motor.
2026/07/30 WUXI-TECO
Driving motors with frequency converters has become an irreversible trend. In practice, however, improper matching between the converter and the motor often leads to various issues.
2026/07/17 WUXI-TECO
A frequency converter (also called a variable frequency drive, VFD) is a power control device that converts a fixed‑frequency AC supply into an AC output with adjustable frequency and voltage. Most converters in use today adopt the AC‑DC‑AC conversion method (VVVF or vector control).
2026/07/16 WUXI-TECO
In industrial power distribution and equipment selection, calculating the rated current of a high‑voltage motor is a fundamental yet crucial task. Many engineers new to high‑voltage systems may think it is complicated, but in fact its core principle is the same as that for low‑voltage motors – it all comes down to power, voltage, and power factor.
2026/07/10 WUXI-TECO
In short, CE marking is the “passport” for products to enter the EU market; ATEX is one of the specific regulations that explosive‑atmosphere equipment must satisfy to obtain that CE marking; and IECEx is an “international passport” designed for global mutual recognition.
2026/06/30 WUXI-TECO
Since a reducer is a transmission device, many faults often occur during its operation due to external working conditions (e.g., bearing heavy loads) and internal factors.
2026/06/12 WUXI-TECO
It can be stated boldly – and accurately – that the overall volume of a motor is determined by the torque it must produce: the larger the volume, the greater the torque. Of course, there may be exceptions to this rule, but as a general guideline for motor selection, it is very useful.
2026/06/11 WUXI-TECO
Low-voltage motors are subject to mandatory BSMI inspection and control, while high-voltage motors are not subject to this restriction. Currently, high-voltage motors have no mandatory energy efficiency regulations and do not require registration in any official system; they only need to comply with relevant specifications for high-voltage electrical equipment.
2026/05/26 WUXI-TECO
KC Certification (Korea Certification) is a mandatory certification implemented by the Korean government to ensure the safety of electronic products and consumer goods. The Korean market has strict requirements for product safety and quality, and obtaining KC Certification is crucial for products to enter the Korean market.
2026/05/11 WUXI-TECO
ATEX certification and IECEx certification both describe the necessary requirements for equipment intended for use in potentially hazardous and dangerous areas, but they differ in certain aspects.
2026/04/29 WUXI-TECO
For Chinese companies planning to export products to Mexico, understanding the local compliance certification system is the first critical step to successfully entering the market. Among the various certifications in Mexico, NOM and FIDE are the two most relevant for electronic and electrical products. The former is a mandatory market access standard, while the latter is a voluntary energy efficiency label. This article provides a systematic overview of the key aspects of both certifications, offering practical compliance guidance for exporters.
2026/04/23 WUXI-TECO
The core difference between the routine test (factory test) and the type test for high-voltage three-phase asynchronous motors is:
The routine test is a "factory pass certificate" performed on every motor to verify the manufacturing quality of each unit. The type test is a "design validation report" performed on a sample from the same specification to verify the design and performance compliance of the entire series.
2026/04/16 WUXI-TECO
The insulation class of high-voltage three-phase asynchronous motors is a core technical indicator defined based on the maximum allowable operating temperature of the insulation materials.
2026/04/10 WUXI-TECO
There are many factors that affect the efficiency of high-voltage motors, including motor body losses, operating conditions, design and structural factors, as well as installation, maintenance, and environment. A detailed analysis is provided below.
2026/03/27 WUXI TECO
The five core performance parameters of a motor are key indicators for evaluating its performance, suitability for application scenarios, and selection criteria. They directly determine the operating state and effectiveness of the motor, including rated power, rated voltage, rated current, rated speed, and rated frequency.
2026/02/11 WUXI TECO
The current mandatory Energy Efficiency Label catalog in China covers 38 product categories. Key motor-related products included are:
• Permanent Magnet Synchronous Motors
• High-Voltage Three-Phase Squirrel-Cage Induction Motors
The implementation rules for these products are specified in the 2025 catalog. For Permanent Magnet Synchronous Motors, the new rules took effect on January 1, 2026. For High-Voltage Three-Phase Induction Motors, the rules will take effect on April 1, 2026.
2026/02/11 WUXI TECO
For enterprises engaged in the business of importing motors for re-export, the application of these exemption clauses is subject to strict limitations. The key lies in proving that the motors are not for sale or use within China but are intended for re-export.
2026/01/29 WUXI TECO
The specific scope of CCC compulsory certification for low-voltage motors is as follows:It applies to low-power drive motors with a rated voltage above 36V (excluding 36V) and below DC 1500V or AC 1000V, including:
2025/10/29 WUXI TECO
Components imported for the exclusive purpose of manufacturing finished products that will be entirely exported may apply for an exemption from CCC certification. The applicant must be the factory/company that uses these components.
2025/10/29 WUXI TECO
NEMA standard enclosure types and their corresponding application environments, and convert NEMA enclosure type ratings to ANSI/IEC 60529 enclosure classification designations (IP).
2025/09/03 WUXI TECO
IEEE 841-2021: For ultra-high-efficiency, heavy-duty, fully enclosed, low-voltage squirrel-cage induction motors for the petrochemical industry, with a power range of 0.75 kW to 370 kW (1 hp to 500 hp).
2025/08/14 WUXI TECO
SPM, or surface permanent magnet synchronous motor, is characterized by its permanent magnets being directly attached to the rotor surface. In contrast, IPM, or internal permanent magnet synchronous motor, is designed and placed inside the rotor.
2025/07/16 WUXI TECO
The reasons for the reduction of motor insulation performance include environmental factors, material aging, mechanical damage, electrical problems, etc. The following methods can be used to deal with them.
2025/07/16 WUXI TECO
When a NEMA motor has special mounting dimensions, flanges, or special shaft features, this is indicated by adding a suffix letter to its frame number.
2025/07/16 WUXI TECO
The protection level is also called the IP level. The larger the number, the better the protection performance, and of course the higher the price. The IP (INGRESS PROTECTION) protection level system was drafted by IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION) to classify electrical appliances according to their dust and moisture resistance characteristics.
2025/07/11 WUXI TECO
When the motor is running, copper loss, iron loss and mechanical loss are all manifested in the form of heat. Part of this heat is absorbed by the motor and part is transmitted to the air. The heat ab
2025/07/11 WUXI TECO
CE certification, the abbreviation of "Conformité Européenne", is a certification mark issued by the European Union (EU) to indicate that the product complies with the relevant regulations and standards of the European internal market and has certain safety, quality and environmental protection performance. CE certification is an important proof for the sale and circulation of products in the European market.
2025/07/04 WUXI TECO
Before installing the encoder, you need to select the encoder based on the motor model, specifications, load, and usage scenarios. Select an encoder model that matches the motor. Explosion-proof motors require explosion-proof encoders, and the encoder needs to have a CCC explosion-proof certificate.
2025/07/04 WUXI TECO
What is a Class 1 Division 2 Hazardous Area?You might have come across the term, Class I, Division 2 Hazardous Area. What does it mean?To understand this, we need to first understand two things- what
2023/07/28 WUXI TECO
Motor Efficiency & How to improve it?Electric motor is a type of machine which converts electrical energy into mechanical energy using the interaction between magnetic field and current in its win
2023/07/26 WUXI TECO
Why use explosion proof motors?The use of explosion proof motors is essential for the safety of your personnel and equipment when operating in a hazardous location. Explosion proof motors are designed
2023/07/26 WUXI TECO
Non-Hazardous LocationsType 1 : General Purpose - IndoorEnclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment and
2023/07/26 Young
Common causes of bearing abnormal noise:1. Impurities such as sand or carbon particles are mixed into the bearing to act as abrasives;2. Dirt such as water, acid or paint is mixed into the bearing to
2023/06/20 WUXI TECO
