▍ brief 　↴

YLBD seriesFully automatic electrical maintenance comprehensive testing systemIt is a testing equipment that integrates multiple electrical maintenance and testing functions, including transformer winding DC resistance testing, transformer ratio and group testing, transformer winding impedance characteristic testing (low-voltage impedance method), transformer insulation resistance measurement (absorption ratio and polarization index), transformer on load tap changer parameter measurement, transformer dielectric loss and capacitance measurement, transformer winding characteristic measurement (frequency response method), transformer demagnetization, high voltage circuit breaker mechanical characteristics and contact resistance. This system is controlled by an industrial computer, Windows operating system, dedicated test project control software, large-sized touch high-definition LCD display screen, and multi-purpose test connection line application. The test data is managed and stored in a computer database.

▍ Product functions and features 　↴

The testing equipment can be manually named

• Full touch screen industrial computer design, high integration level of functional testing
• Integrated design, compact and reasonable structure, lightweight and portable
Customized test reports can be generated according to testing requirements
• Large storage capacity for test data, can be stored on a USB flash drive
• With multiple wired and wireless communication interfaces, it facilitates the expansion of instrument functions
The system memory stores instructions and operation videos, making it convenient for users to make emergency calls on site
The system comes with automatic protection function for power misconnection and alarm function for grounding wire not connected, ensuring your safe use

▍ Product Technical Parameters　↴

performance
Using Windows operating system, 10/12 inch true color LED screen, Intel processor
32GB solid-state drive, 2GB DDR3 memory

DC resistance test of transformer winding
• Current output: 100mA, 200mA, 1A, 2.5A, 5A, 10A, 20A, automatic range
• Measurement range: 200 Ω~240 Ω
Ratio and group testing, rectifier transformer, Scott, inverse Scott, and balance transformer testing (optional)
Voltage output: High voltage side AC 12V, 24V, 48V, 80V, 160V optional
• Measurement range: 0.8-20000

Transformer winding impedance characteristic test (low voltage impedance method)
Impedance method for measuring voltage: 0~220V
Impedance measurement: 0-10A
Impedance method frequency: 50Hz/60Hz

Measurement of insulation resistance of transformers (absorption ratio and polarization index)
Voltage output: 100/250/500/1000/2500/5000V
• Measurement range: 0.01M Ω~500GM
• Output current: 5mA

Measurement of on load tap changer parameters for transformers
Three phase constant current source charging current: 3A/1A range; 0.6A/0.2A gear
• PortszuiHigh voltage: 24V
• Transition resistancezuiLarge range: 100 Ω
• Transition resistance measurement range: 1A gear: 0.4 Ω~20 Ω 0 2A gear: 10 Ω~100 Ω
• Duration of waveform recording: 300ms

Measurement of transformer dielectric loss and capacitance
•zuiHigh output voltage: 10kV
•zuiHigh output current: 200mA
•zuiLarge capacity: 2000VA
• Measurement range: TG δ unlimited, 15pF ＜ Cx ＜ 300nF 10kV: Cx ＜ 60nF 5kV: Cx ＜ 150nF 1kV: Cx ＜ 300nF
CVT measurement range: Cx<300nF
Self excitation power supply: AC0~50V/15A
CVT ratio measurement range: 10~10000

Measurement of Transformer Winding Characteristics (Frequency Response Method)
• Output voltage: Vpp-25V, automatically adjusted during testing
• Input impedance: 1M Ω (with a built-in 50 Ω matching resistor in the response channel)
• Output impedance: 50 Ω
• Wide measurement dynamic range: -120dB to 20dB
Sweep frequency range: 10Hz-2MHz

Transformer demagnetization
• Demagnetization current: 10/5A, 1A, 200mA, 5mA
• Demagnetization mode: intelligent automatic
• Demagnetization time: 9min/time
• Demagnetization effect: greater than 90%

Mechanical characteristics and contact resistance of high-voltage circuit breakers
• Main contacts: 12
Time measurement range: 1-16000ms
• Displacement sensors: 3
• Travel measurement range: 0-999 mm
• Speed measurement range: 0-20m/s
• Coil current testing range: 0-15 A
DC power output: 10-270V/10A
• Loop resistance measurement range: 10 μ Ω~19999.9 μ Ω
Test current: 100A
• Measurement range of action coil resistance: 1-5M Ω

▍ Recommended Function Configuration Table　↴

Overview: Windows operating system, dedicated test project control software, large-sized touch sensitive high-definition LCD display screen, multi-purpose test connection cable application, test data is managed and stored in a computer database.

YLBD-908
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test
• Dielectric loss test
• Short circuit impedance test
• Frequency response method for winding deformation testing
Transformer demagnetization

YLBD-918
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test
• Mechanical characteristic testing of switches
• Loop resistance test
• Resistance test of switch action coil
Transformer demagnetization

YLBD-919
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test
• Dielectric loss test
• Mechanical characteristic testing of switches
• Loop resistance test
• Resistance test of switch action coil
Transformer demagnetization

YLBD-907
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test
• Short circuit impedance test
• Frequency response method for winding deformation testing
Transformer demagnetization

YLBD-906
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test
• Dielectric loss test
Transformer demagnetization

YLBD-905
DC resistance test, maximum current of 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test
Transformer demagnetization

YLBD-904
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Dielectric loss test

YLBD-914
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV
• Load tap changer characteristic test

YLBD-903
• DC resistance test,zuiHigh current 20A
• Ratio and group testing
• Insulation resistance test,zuiHigh voltage 5kV