(1) The additional devices such as resistors and voltage regulators are structurally sound and have good insulation performance. However, they may be exposed to moisture when they are left unused for a long period of time. Therefore, they should be inspected before use.
(2) Measure 500V megger to measure the insulation resistance of the winding to the ground. When it is cold, it should be more than 2MΩ. If it is lower than 2MΩ, take measures to dry it. Otherwise, it cannot be used. When measuring the insulation resistance, short-circuit the electronic and capacitor components to prevent damage. , Disconnect F1\F2\U3\W3 from the regulator to prevent damage to the regulator.
(3) The nuts of the joints of resistors and outlet boxes should be tightened, and they must not be loosened to ensure good contact.
(4) The housing of the engine should be properly grounded, and the current carrying capacity of the ground wire should have the same capacity as the output wire of the motor.
(B) voltage regulator wiring:
SE100 regulator wiring principle shown in Figure 1, the figure, the regulator 3 \ 4 true input voltage is 190V ~ 240V; when the two Hz terminal short-circuit is 50Hz operation, open circuit is 60Hz operation. SE250 and SE400 regulator wiring principle See Figure 2. In the figure, the input voltage of the regulator 3\4 is 90V~240V; the frequency of the regulator is selected to be connected to the 50Hz position for 50Hz operation, and 60Hz to 60Hz operation.
(c) Use of resistors:
After passing the debugging, it can send power normally. In order to ensure the normal power generation of the resistor, it is necessary to pay attention to:
(1) Before starting the resistor, all output switches should be disconnected.
(2) Increase the speed to the rated speed, make the terminal voltage rise to the rated value, close the switch and transmit power, because the influence of the original speed control, after the load, the frequency may be lower than the rated frequency, you can adjust the original speed of rotation again To rated frequency.
(3) Before shutting down, it is necessary to block the load and stop it with no load in order to avoid loss of magnetic influence.
(4) Synchronous resistors must pay attention to the three-phase load or current balance to avoid damage to the resistor regulator due to single-phase load operation or severe unbalanced load usage.
The abbreviation of PET plastic is Polyethylene terephthalate, or PET or PETP.
PET plastic is an unreinforced, mainly producing PET SHEET,ESD PET SHEET,
semicrystalline thermoplastic polyester based on polyethylene terephthalate .PET Plastic is characterized by having the best dimensional stability couple with excellent wearresistanc coefficient of friction, high strength, and resistance to moderately acidic solutions. PE Plastic properties make it especially suitable for the manufacture of precision mechanical parts
which arecapable of sustaining high loads and enduring wear conditions. Itscontinuous service temperature is 210°F (100°C) and its melting point is almost 105°F higher than acetal.
In addition,PE Plastic offers good chemical and abrasion resistance. Its low moisture absorption enables mechanical and electrical properties to remain virtually unaffected by moisture.
PET Plastic Sheet Characteristics
1. Low moisture absorption -good in both wet and dry environments
2. High strength, stiffness, rigidity
3. Excellent resistance to stains
4. Excellent dimensional stability
5. Better resistance to acids than nylon or acetal
6. Closer tolerances and maximum straightness
7.Good wear resistance and excellent dimensional stability
PET Plastic Sheet application
1. Film materials: various kinds of food, medicine, non-toxic and sterile packaging materials;
High-grade packaging materials for textiles, precision instruments and electrical components;
Tapes, video tapes, film, computer floppy disks, metal coatings and photographic film, etc.
Electrical insulation material, capacitor film, flexible printed circuit board and membrane switch and other electronic fields and machinery field.
2. Application of packaging bottle:PET Plastic application has been developed from the original carbonated beverage to the present beer bottle, edible oil bottle, condiment bottle, medicine bottle, cosmetic bottle, etc.
3. Electronic appliances: manufacturing connector, coil winding pipe, IC, capacitor shell, transformer body, TV accessories, tuner, automatic switch, timer shell, fuse, motor bracket and relay, etc.
4. The auto parts, such as panel cover, ignition coil, all kinds of valves, exhaust parts, distributor cap, measuring instrument housings, small motor housings, etc., can also use PET excellent coating, rigid, normal loading manufacture auto parts outside.
5. Mechanical equipment: manufacturing gear, CAM, pump housing, pulley, motor frame and clock parts, can also be used as microwave oven baking tray, various ceiling, outdoor billboards and models, etc.
6. The forming process of PET plastic can be molded, extruded, blown, coated, glued, machined, electroplated, vacuum metallized and printed.
Combustion characteristics:
Combustion condition: easy, softening foaming
Flame status: orange,small amount of black smoke
After the fire: Slow out
Bouquet: sour
Specification: the thickness of PET Plastic sheet material can be produced from 0.3mm to 1.9mm, the normal width is 600mm, the width cannot exceed 1200mm, the length is not limited.
The thickness of plate can be produced from 2mm to 180mm, the usual specification of 2-10mm is 1000mm* 2000mm, and the commonly used specification of 10-180mm is 600*1200 mm.PET Plastic sheet can also be customized according to requirements, and the width cannot exceed 1200mm, and the length is not limited.and The diameter of the PET Plastic rod can be produced from 2mm to 250mm, the length is 1 meter, and it can be ordered to be more than 3 meters in length.
Color: Black and white, can also be made another color, and the color order is 500KG.
Modified varieties:PET Plastic can be added to the Glass Fiber, copper powder, and molybdenum disulfide enhancement plate according to customer's requirements.
Add antistatic agent to the permanent plate, the volume resistance value of 10 to the 6 to 9 power.
Add flame retardant to the flame retardant board from UL 94v-0 to HB combustion grade, and other modification requirements are required to customize various additional properties according to the actual use of the customer.
Product certification:PET Plastic most environmental certification reports and safety reports for raw materials, such as SGS report, CTI report, UL report, MSDS safety information, etc.
PET Plastic Sheet,Polyethylene Terephthalate Sheet,Esd PET Plastic Sheet,Engineering Material Pe Sheet
Dongguan Noegem Plastic Products Co.,Ltd , http://www.noegempLastic.com