HCTT 15kV/75kVA Test Transformer

Mode: HCTT 15KV/75KVA
Introduction：
The AC test transformer are especially designed for testing high voltage products and components, such as power cables, transformers, gas-insulated switchgears, generators, bushings,  arresters and other HV apparatus. They are  mainly used for AC voltage withstand insulation test system. These systems are particularly suited for tests requiring stable voltage even if the load changes under voltage (corona, wet & pollution tests) or when the load is inductive (inductive voltage transformers).The AC dielectric voltage test system have two types: insulated cylinder type and metal tank type.

Cylinder type                                                                             Noise: ≤60db
Rated capacity:75kVA                                                              Waveform deviation factor:≤3%
Input voltage: 0-400V                                                               No-load current:IO<8%                                                            
Output voltage:15kV                                                                 Measurement winding voltage:100V
Output current:5A                                                                     PD Level: :<2pC at 100%UH of complete test system
Frequency:50Hz                                                                        Insulation level: withstand 5kV/min (Low voltage input ending to ground)
Single phase                                                                             Cooling methods: ONAN
Dielectric loss <0.5%                                                               Dimension: L800mm*W800mm*H950mm
Dielectric loss <0.5%                                                               Weight: 470 kg

 

Transformer Oil: 
25# transformer oil is from Karamay Refinery. The oil indicator can reach the oil level for 500KV transformers. Factory test of test transformer should use new transformer oil supplying with transformers and perform oil inspection before or after factory test. Oil inspection report should be provided when the transformer delivered filled with oil. Quality of transformer oil should meet the requirements of SH0040-91, GB2536-90, GB7595-87, SD187-86, Class II A of IEC-296 standards. Components PCB are prohibited in the oil. When doing acceptance test on-site, the oil performance should satisfy the following requirements: DGA analysis of total hydrocarbons less than 10 mg/L, the breakdown voltage of the oil should not be less than 65kV/2.5mm, dielectric loss (90°C) is not more than 0.3%, water content is not more than 10mg/L, the gas content is not more than 1%.     

Principle Diagram: