Mitsubishi FR-F740 inverter installation environment - Solutions - Huaqiang Electronic Network

The standard specifications of the Mitsubishi FR-F740 inverter installation environment are shown in the table below. When used in places where this condition is exceeded, it will not only cause performance degradation, but also shorten the life and even cause malfunction. Take the following points and take sound countermeasures. Standard environmental specifications for the drive

The ambient temperature of the project is LD-10°C～+50°C (no icing) SLD-10°C～+40°C (no icing) ambient temperature 90%RH or less (no condensation) environmental flammable gas, oil mist, dust If the altitude is below 1000m, the vibration is below 5.9m/s2* (according to JIS C 60068-2-6 standard) When the temperature is above S220K, the speed is below 2.9m/s2. (1) Temperature The allowable temperature range of Mitsubishi inverter is -10 °C to +50 °C (when LD is set) or -10 °C to +40 °C (when SLD is set), and must be used within this temperature range. When used in excess of this range, the life of semiconductors, components, capacitors, etc., is significantly shortened. Take the following measures to control the ambient temperature of the inverter within the specified range. 1 High temperature countermeasures ■ Cooling methods such as forced air exchange are used. (Refer to page 30) ■ Install the inverter electrical cabinet in an air-conditioned electrical room. ■ Avoid direct sunlight. ■ Set the cover plate and so on to avoid direct heat from the heat source, warm air, etc. ■ Ensure good ventilation around the electrical cabinet. 2 Low temperature measures ■ Install a heater in the electrical cabinet. ■ Do not cut off the power to the inverter. 3 Intense temperature change ■ Select the inverter where there is no severe temperature change. ■ Avoid installing near the air outlet of air conditioning equipment. ■ Install away from the door when affected by the door switch. (2) Humidity The ambient humidity range of Mitsubishi inverter is usually 45 to 90%. Please use it within this humidity range. When the humidity is too high, insulation degradation and corrosion of metal parts may occur. On the other hand, if the humidity is too low, space insulation damage will occur. The insulation distance specified in JEM1103 “Insulation for Control Equipment” is 45 to 85% humidity. 1 High humidity countermeasures ■ Design the electrical cabinet as a sealed structure and put in a hygroscopic agent. ■ Drain dry air from the outside into the tray. ■ Install a heater in the electrical cabinet. 2 Low humidity countermeasures ■ Blow air of suitable humidity from the outside into the electrical cabinet. When installing or inspecting the component unit in this state, discharge (electrostatic) of the human body should be performed before operation. At the same time, it is important to not touch components and curves. 3 Condensation measures Condensation occurs when the temperature inside the electrical cabinet changes abruptly due to frequent start and stop, or when the ambient temperature changes abruptly. Condensation can cause insulation degradation or rusting. ■ Take 1 high humidity countermeasure. ■ Do not cut off the power to the inverter. (3) Dust, oil mist will cause contact failure in the contact part. When the dust absorbs moisture, the insulation will decrease, the cooling effect will decrease, and the filter mesh hole will cause the temperature inside the electrical cabinet to rise. In addition, the floating conductive powder environment may malfunction in a short time, and the insulation may be deteriorated or short-circuited. The same situation can occur in the case of oil mist, and it is necessary to take corresponding countermeasures. Countermeasures ■ Install in an electrical cabinet with a sealed structure. Take appropriate measures when the temperature inside the electrical cabinet rises. (Refer to page 30) ■ Perform air purification. The clean air pressure is sent from the outside into the electrical cabinet to keep the pressure inside the electrical cabinet larger than the external air pressure. (4) Corrosive gases, when the salt is installed in a place with corrosive gas or in a place near the coast that is susceptible to salt damage, may cause printed circuit boards, corrosion of components, and poor contact at the switch site. When using in such a place, please use the countermeasures in (3). (5) Inflammable and explosive gas inverters are not designed for explosion-proof construction and must be installed in a disk designed for explosion-proof construction. When it is used in a place that may be caused by explosive gas or dust, it must be structurally in compliance with the benchmarks in the law and passed the test. In this way, the price of the electrical cabinet (including inspection costs) will be very high. Therefore, it is best to avoid installation in the above places, but should be installed in a safe place. (6) In the high ground, use the inverter at an altitude of 1000 m or less. This is because the air becomes thinner as the height increases, which causes a decrease in the cooling effect, and the pressure drop is likely to cause deterioration of the insulation withstand capability. (7) Vibration and shock are based on JIS C 60068-2-6 standard. The vibration withstand capability of Mitsubishi inverter should be 10 to 55 Hz, and the acceleration should be 5.9 m/s2 or less when the amplitude is 1 mm (when the temperature is above S220K, the speed is 2.9 m). /s2 below). Even if it is shaken, if the impact is below the specified value, if it is applied for a long time, it may cause looseness of the mechanism part, poor contact of the connector, and the like. In particular, accidents such as breakage of the component mounting legs are likely to occur when the impact is repeatedly applied, and attention should be paid. Countermeasures ■ Install anti-vibration rubber in the electrical cabinet. ■ Strengthen the structure of the electrical cabinet to avoid resonance. ■ Keep away from vibration sources during installation.