Electric/Electronic Components (A2FJ020000) Spare Parts

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A2FJ020003: Prolong Model Handle Switch

Housing: Reinforced PA66 Engineering Plastic (Flame-Retardant UL94 V-0); Contacts: Silver-Plated Copper Alloy; Handle: Rubber-Coated Aluminum Alloy

Rated Voltage: AC 220V/380V; Rated Current: 10A; Contact Type: Single Pole Double Throw (SPDT)

1. Contact wear and oxidation from frequent on-off operations; 2. Mechanical fatigue of internal springs and linkages due to repeated handle actuation; 3. Ingress of dust and moisture leading to contact corrosion and insulation degradation

1. Avoid frequent and rapid actuation of the handle to reduce mechanical fatigue; 2. Install a dust-proof and waterproof cover (IP65 rating) in dusty or humid environments; 3. Regularly inspect contact surfaces for oxidation (use a multimeter to check contact resistance, limit: ≤50mΩ); clean or replace if exceeded

2

A2FJ020007: Select Switch

Housing: Flame-Retardant ABS Plastic (UL94 V-0); Contacts: Silver-Nickel Alloy; Switch Core: Brass Alloy

Rated Voltage: AC 380V; Rated Current: 6A; Switch Positions: 3-Position (0-1-2)

1. Contact ablation caused by arcing during load switching; 2. Wear of the switch core's positioning mechanism from repeated position adjustments; 3. Insulation damage due to voltage surges or static electricity

1. Ensure the switch is used within rated voltage/current limits to avoid arcing; 2. Avoid switching under full load; use auxiliary contactors for high-current loads; 3. Install surge protectors (SPD) in circuits prone to voltage surges; ground the switch housing properly

3

A2FJ020010: Air Switch

Housing: Die-Cast Aluminum Alloy (Anti-Corrosion Coated); Diaphragm: Nitrile Butadiene Rubber (NBR); Contacts: Silver-Plated Copper

Control Air Pressure: 0.3-0.8 MPa; Rated Voltage: AC 380V; Rated Current: 16A

1. Wear of the rubber diaphragm from repeated air pressure actuation; 2. Contact corrosion due to moisture in compressed air; 3. Blockage of air inlet by oil or debris in the air system

1. Ensure compressed air is clean and dry (dew point ≤ -20℃); install an air filter-regulator upstream; 2. Regularly drain condensate from the air system to prevent moisture intrusion; 3. Inspect the diaphragm for cracks or aging every 1200 operating hours; replace if damaged

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A2FJ020011: Air Switch

Housing: Die-Cast Aluminum Alloy (Anti-Corrosion Coated); Diaphragm: Fluororubber (FKM); Contacts: Silver-Plated Copper

Control Air Pressure: 0.2-0.7 MPa; Rated Voltage: AC 220V; Rated Current: 10A

1. Degradation of FKM diaphragm due to exposure to oil mist in compressed air; 2. Mechanical wear of internal actuation components from vibration; 3. Contact loosening caused by equipment vibration

1. Use oil-free compressed air or select oil-compatible FKM diaphragms if oil mist is present; 2. Mount the switch on a vibration-damping bracket to reduce mechanical stress; 3. Check contact tightness regularly; re-tighten terminal screws if loose (use torque wrench: 0.8-1.2 N·m)

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A2FJ020014: Explosion-Proof Magnetic Switch

Housing: Cast Iron (Ex d IIC); Contacts: Silver-Plated Tungsten Alloy; Coil: Copper Wire with Heat-Resistant Enamel (Class F Insulation)

Explosion-Proof Rating: Ex d IIC T6; Rated Voltage: AC 380V; Coil Voltage: AC 220V; Rated Current: 25A

1. Contact wear from arcing in high-current applications; 2. Coil overheating due to voltage fluctuations or overload; 3. Sealing failure leading to ingress of flammable gases (hazardous for explosion-proof performance)

1. Strictly use within explosion-proof rating limits; avoid using in environments exceeding IIC T6; 2. Monitor power supply voltage (fluctuation ≤ ±10% of rated voltage) to prevent coil overheating; 3. Regularly inspect sealing gaskets for aging or damage; replace and re-seal if necessary (torque for housing bolts: 8-10 N·m)

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A2FJ020015: Switch

Housing: Flame-Retardant PC Plastic (UL94 V-0); Contacts: Silver-Plated Copper Alloy; Internal Mechanism: Steel Alloy

Rated Voltage: AC 220V; Rated Current: 16A; Contact Type: Double Pole Single Throw (DPST)

1. Contact oxidation from long-term static operation; 2. Mechanical wear of internal springs from occasional actuation; 3. Damage from accidental impact or improper operation

1. Conduct regular on-off tests (monthly) to prevent contact oxidation; 2. Install a protective cover to avoid accidental impact; 3. Avoid using the switch to control loads exceeding its rated current; use a relay for overload protection

1

A2FJ020012: Voltage Changer

Housing: Steel Sheet (Powder-Coated); Transformer Core: Silicon Steel Sheet (30Q130); Windings: Oxygen-Free Copper Wire

Input Voltage: AC 380V ±10%; Output Voltage: AC 110V/220V (Adjustable); Rated Power: 500VA

1. Core loss and winding heating due to long-term full-load operation; 2. Insulation aging of windings caused by high temperature or humidity; 3. Vibration-induced loosening of winding leads

1. Avoid long-term full-load operation; keep load ≤ 80% of rated power; 2. Ensure adequate ventilation around the changer (clearance ≥ 10cm); monitor operating temperature (limit: ≤ 85℃); 3. Check lead connections regularly; re-solder if loose or oxidized

2

A2FJ020013: Transformer (380/220V 1000VA)

Core: Cold-Rolled Silicon Steel Sheet (35W250); Windings: Copper Wire (Class B Insulation); Housing: Flame-Retardant Plastic (UL94 V-0)

Input Voltage: AC 380V; Output Voltage: AC 220V; Rated Power: 1000VA; Frequency: 50/60Hz

1. Overheating of windings due to overload or poor ventilation; 2. Core vibration and noise caused by loose core laminations; 3. Insulation breakdown due to voltage surges or moisture ingress

1. Install the transformer in a well-ventilated, dry location; avoid direct sunlight; 2. Use a thermal protector (temperature setpoint: 130℃) in series with the primary winding; 3. Install a surge arrester at the input terminal to protect against voltage spikes; ground the housing properly

3

A2FJ020022: UPS (Continuous Current 6011)

Housing: Aluminum Alloy (Heat-Dissipating); Battery: Sealed Lead-Acid Battery (VRLA); Circuit Board: FR-4 Epoxy Resin Board

Input Voltage: AC 220V; Output Voltage: AC 220V; Rated Current: 60A; Backup Time: 15-30min (Full Load)

1. Battery capacity degradation from frequent charge-discharge cycles; 2. Circuit board component damage due to electromagnetic interference (EMI); 3. Overheating of inverter module from long-term backup operation

1. Perform regular battery maintenance: charge fully every 3 months if not used; replace battery every 3-5 years; 2. Install the UPS away from high-EMI equipment (e.g., motors, frequency converters); 3. Avoid long-term backup operation; switch to mains power promptly after power recovery; monitor inverter temperature (limit: ≤ 90℃)

1

A2FJ020020: Pressure Transformer (MB300GV1B1C1, 0-2.5 MPa)

Sensing Element: Piezoresistive Silicon Chip; Housing: 316L Stainless Steel; Cable: PVC-Sheathed Shielded Cable

Pressure Range: 0-2.5 MPa; Output Signal: 4-20mA DC; Accuracy: ±0.5% FS; Supply Voltage: 24V DC

1. Sensing element drift due to temperature changes; 2. Corrosion of pressure port by aggressive media (e.g., acidic/alkaline fluids); 3. Cable damage from mechanical abrasion or oil contamination

1. Calibrate the transformer annually using a standard pressure gauge; perform temperature compensation if used in extreme temperatures (-20℃ to 80℃); 2. Select compatible process connections and materials for corrosive media; install a chemical filter if necessary; 3. Route the cable through cable trays or protective conduits to avoid abrasion; avoid pulling or twisting the cable

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A2FJ020030: Quadratic Transformation Instrument (0-2.5 MPa)

Housing: ABS Engineering Plastic (Flame-Retardant); Circuit Board: FR-4 Epoxy Resin; Display Panel: LCD (Anti-Glare)

Input Signal: 4-20mA (from Pressure Transducer); Output Signal: 0-10V DC; Pressure Range: 0-2.5 MPa; Accuracy: ±0.2% FS

1. Circuit board component aging due to high temperature and humidity; 2. Display panel damage from direct sunlight or mechanical impact; 3. Signal interference caused by unshielded wiring

1. Install the instrument in a temperature-controlled environment (0℃ to 50℃); avoid high-humidity areas (relative humidity ≤ 85%); 2. Use an anti-glare cover for the display panel; avoid direct sunlight; 3. Use shielded twisted-pair cables for signal transmission; ground the shield at one end (signal source side)

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A2FJ020031: Quadratic Transformation Instrument (0-25 MPa)

Housing: ABS Engineering Plastic (Flame-Retardant); Circuit Board: FR-4 Epoxy Resin; Display Panel: LCD (Anti-Glare)

Input Signal: 4-20mA (from Pressure Transducer); Output Signal: 0-10V DC; Pressure Range: 0-25 MPa; Accuracy: ±0.2% FS

1. Overload damage from input signal exceeding the instrument's range; 2. Circuit board corrosion due to moisture ingress; 3. Terminal loosening caused by equipment vibration

1. Ensure the input signal is within the 0-25 MPa corresponding range (4-20mA); install a signal limiter if necessary; 2. Seal the instrument's cable entry with a cable gland to prevent moisture ingress; 3. Check terminal connections regularly; re-tighten screws with a torque wrench (0.5-0.8 N·m)

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A2FJ020032: Quadratic Transformation Instrument (0-40 MPa)

Housing: ABS Engineering Plastic (Flame-Retardant); Circuit Board: FR-4 Epoxy Resin; Display Panel: LCD (Anti-Glare)

Input Signal: 4-20mA (from Pressure Transducer); Output Signal: 0-10V DC; Pressure Range: 0-40 MPa; Accuracy: ±0.2% FS

1. High-pressure signal-induced component fatigue; 2. Electromagnetic interference (EMI) from nearby high-voltage equipment; 3. Power supply fluctuation causing signal distortion

1. Install the instrument away from high-voltage equipment (clearance ≥ 1m); use EMI filters if necessary; 2. Use a stabilized power supply (voltage fluctuation ≤ ±5%) to power the instrument; 3. Perform regular calibration (semi-annually) using a high-precision pressure signal simulator

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A2FJ020021: Electromagnetic Valve

Valve Body: 304 Stainless Steel; Spool: Hardened Steel (HRC 58-62); Sealing Elements: Fluororubber (FKM); Coil: Copper Wire (Class H Insulation)

Rated Voltage: DC 24V / AC 220V; Operating Pressure: 0.1-31.5 MPa; Flow Rate: 10 L/min; Response Time: ≤ 10ms

1. Spool jamming caused by contamination of hydraulic oil (metal particles, sludge); 2. Seal wear and leakage due to high-pressure hydraulic oil; 3. Coil burnout caused by overvoltage or reverse polarity (for DC coils)

1. Use hydraulic oil that meets ISO 6743/4 standards (e.g., HM 46); install a high-precision filter (filtration accuracy ≤ 10μm) in the hydraulic system; 2. Regularly check for oil leakage around the valve; replace seals if leakage is detected; 3. Ensure correct voltage polarity (for DC coils); install a voltage regulator to avoid overvoltage; check coil temperature during operation (limit: ≤ 105℃)