We require frequency converters for our electrical testing laboratory to stabilize power sources. The specifications are:
- 3-phase system with Delta input and Wye output (4-wire configuration)
- Input/Output frequency: 50Hz
- Input voltage range: 0-440V, Output voltage range: 0-440V/220V
- Required capacities: 15KVA, 20KVA, 25KVA and 30KVA models
- Must handle inductive loads from electrical testing equipment
- Pure sine wave output with THD<3%
- Compliance with IEC standards for voltage/frequency tolerance
- Certification needed for ISO/IEC 17025 laboratory accreditation

No existing VFD installations in our system. Please provide technical specifications and certifications with quotation.

I am looking for a complete ultrasonic system suitable for use in high - temperature molten metal processing (up to around 1200?°C) for degassing and metallurgical improvement. Confirm: 1. Can the system operate near 1200?°C? 2. Maximum temperature resistance of the sonotrode and components? 3. What’s included in the full system? 4. Power output (W)? 5. Working frequency (kHz)? 6. Provide technical documentation or a warranty? Clarification: 1. Molten material reaches 1150–1200°C, system should be above the melt surface or partially immersed with proper thermal resistance and gas protection. 2. System for degassing and refinement of the melt structure. 3. Complete solution includes generator, transducer, booster, high - temperature sonotrode, mounting stand or tripod, HF cable and accessories. Advise: 1. Maximum working temperature the sonotrode can tolerate? 2. Available power options (min 1000W)? 3. Possible to have a system at 30 kHz? 4. Offer water - cooling or thermal insulation options for the convert?

We need two options, option 1 is Asynchronous Motors , Option 2 is Permanent Magnet Synchronous motors. 1. ALTERNATOR Model: ECP34 2S4C 50Hz 415V 100KVA. Suggested Motor Specifications: Type: Asynchronous Motors. Rated Power: size to meet the requirement for safe operation of alternators at all loading conditions. Input Voltage: 400 V. Design Base Frequency: 100 Hz. No of poles: 8. Rated Speed: 1500 r/min. Rated Torque: suitable to drive the Alternator at all loading conditions. Insulation Class: H. Protection Class: IP55. Outside temp :50 degree celcuis. Motor Encoder : Yes. Suitable for VFD Control: Yes, vector control with encoder input. 2. ALTERNATOR Model: HCO38 2L26 A 400Hz 180KVA. Suggested Motor Specifications: Type: Asynchronous Motors. Rated Power: size to meet the requirement for safe operation of alternators at all loading conditions. Input Voltage: 400 V. Design Base Frequency: 92.3Hz

We are interested in the frequency converter: - Input voltage 6 or 10 kV - Output voltage 6 or 10 kV - Inverter capacity from 6 MVA (6000 kVA). Can you send me a quote?

We are interested in the frequency converter: - Input voltage 6 or 10 kV - Output voltage 6 or 10 kV - Inverter capacity from 6 MVA (6000 kVA). Can you send me a quote?

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I'm going to purchase several frequency converters for the company.

Dear Sir/Madam, Kindly quote the price and availability of the following items. 1. EXCITATION TRANSFORMER Rating = 500KVA Continuous duty,11KV/265V, 50Hz with 5 tapping positions from 11.55kV to 10.45kV Insulation Class: F, Type: Three Phase two winding Converter transformer Resin insulation Dry type Model: ZSCB9-500/11 Standard: GB1094.11 IEC60076- 11, Certification: ISO9001 Certified Vector group= Yd11 Protection level: IP20 Rated current HV/LV: 26.2/1089A Type of cooling= AN/AF having cooling fans at each phase with temperature controller Rated Impedance =4.15%, Climatic Class: C2 Total mass: 2040kg, Environmental Class: E2, Fire behavior class: F1, Temp. Rise Limit: 80K Insulation level in kV (Line Terminal) HV side: LI/AC75/35 KV Insulation Level in kV (Line Terminal) LV side: LI/AC 0/3 KV 2. STATION SERVICE TRANSFORMER:       Type: Dry type, cast resin insulation Rating: 500KVA Continuous duty,11/0.4kV with 05 tapping positions (from 11.55kV to 10.45kV) ,50Hz. Model: SCB9-500/11, Standard: GB1094.11 IEC60076-11, Certification: ISO9001 Certified Operating condition: Indoor Cooling: AN/AF having cooling fans at each phase with temperature controller Thermal class: F class Rated Impedance: 3.88%, Vector group: Dyn11 Rated current primary side: 26.2A Rated current secondary side: 722A Temperature rise limit: 100K, Protection level: IP20, Total mass: 2090kg, Climatic Class: C2, Environmental Class: E2, Fire behavior class: F1 Insulation level in kV (Line Terminal) HV side: LI/AC75/35 Insulation Level in kV (Line Terminal) LV side: LI/AC 0/3   3. NEUTRAL GROUNDING TRANSFORMER Specifications Transformer Rating:11/0.5/0.11kV, 40KVA Single Phase Model: ZZD-11/1.367F, Certification: ISO9001 Certified, Rated voltage: 11/√3 kV, Rated frequency: 50Hz, Rated Current: 274A, Rated Time: 30 sec Resistance value: 1.367?, Weight: 1500kg

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