270kVA-270kV Series Resonance Test Device

Product Introduction

The main purpose of the MEXB-270kVA-270kV Variable Frequency Series Resonance Test System is to test the AC withstand voltage of 10/35/110kV cables, as well as 110kV transformers, busbars, switches, and other major electrical equipment. Because the reactors are built as several distinct units, they can be tested for low-voltage AC withstand voltage requirements, including those for 10kV cables, as well as high-voltage, low-current equipment. Because of its broad range of applications, it is a perfect withstand voltage device for power installation, maintenance, and testing engineering units as well as high-voltage testing departments at the provincial, municipal, and county levels.

The MEXB-270kVA-270kV Variable Frequency Series Resonance Test System primarily consists of a variable frequency control power supply, excitation transformer, reactors, and capacitive voltage divider.

Product Parameter (specification)

1. Variable Frequency Power Supply (One Unit)
Rated Power	15kW;
Input Voltage	Single-phase 380V±5% 50Hz
Output Voltage	Adjustable 0–400V
Output Voltage Frequency	30–300Hz
Adjustable in	0.1Hz steps
Frequency Unstability	≤0.02%
Output Current	0–37.5A
2. High-Voltage Reactors (six units total)
Rated Operating Voltage	45kV
Rated Operating Current	1A
Rated Inductance	124.5
Continuous Operating Time	15 min
Temperature Rise	<45°C
Operating Frequency	30~300Hz
3. Excitation Transformer (one unit)
Rated Capacity	15kVA
Input Voltage	400V
Output Voltage	1kV/3kV/5kV/20kV
Output Current	15A/5A/3A/0.75A
4. Capacitive Divider (One Set)
Self-Capacitance	1000pF
Rated Voltage	300kV
Operating Frequency	30–300Hz
Uncertainty	1.5%
Rated Voltage	300kV/1000pF
5. Test Lead Set and Accessories (One Set)
1) Internal Connection Cables (One Set) 2) Reactor Insulation Bases (Six Pieces) 3) Equalizing Rings (One Pair) 4) Divider and Reactor Supports (Two Sets)

Product feature and application

1. The device has protective features for overvoltage, overcurrent, zero-position start, and system detuning (flashover). The thresholds for overvoltage and overcurrent protection can be changed to suit the needs of the user. The flashover protection turns on during specimen flashover and logs the flashover voltage measurement for test analysis.

2. Because each unit is lightweight, on-site operation is made easier.

3. To improve testing efficiency, the gadget has three operating modes that users can choose according to site conditions.
Three operating modes are available: Auto-Tuning Manual Voltage Increase Mode, Fully Automatic Mode, and Manual Mode.

4. Remote data storage and printing is possible. Numerical identifiers are assigned to stored data to facilitate user recognition and retrieval.

5. The beginning frequency can be flexibly adjusted within the designated range during automatic frequency sweeping. It is possible to choose an upward or downward sweep direction. Users can easily identify resonant point detection by viewing the scan curve on the huge LCD screen.

6. Makes use of DSP platform technology, which improves the user-friendly human-machine interface and for the flexible addition or removal of features and improvements based on user needs.

Prodection details

1. AC Withstand Voltage Test for 10/35/110kV Cross-linked Polyethylene Cables

2. AC Withstand Voltage Test for 110kV Transformers, Line Insulators, Switches, GIS, and Other Primary Electrical Equipment

Company Qualifications

FAQ

1)What advantages does the MEXB-W270kVA/270kV variable frequency series resonant test device gain by adopting DSP platform technology?

Answer: The adoption of DSP platform technology enables this device to conveniently add or remove functional modules based on actual user requirements. It also facilitates post-production upgrades and iterations of product functionality, adapting to a wider range of test scenarios. Additionally, it enhances the user interface with greater intuitiveness and clearer operational logic, reducing the learning and usage difficulty for operators while improving the overall convenience of test operations.

2)During testing, if the MEXB-W270kVA/270kV variable frequency series resonant test device fails to start its fan, what are the possible causes?

Answer: Two potential causes exist: First, if the device undergoes an emergency stop, fault protection, or detuning protection, and the operator fails to press the "Fault Reset" button, the fan cannot start normally. Second, excessive internal temperature may trigger thermal protection in the power components, thereby interrupting the fan's operating circuit.

3)The touchscreen display of the MEXB-W270kVA/270kV variable frequency series resonance test set features a "Parameter Calculation" function. What operations does this function enable?

Answer: The "Parameter Calculation" function supports inputting any two known values from the three physical quantities: inductance, capacitance, and frequency. The system automatically calculates the third unknown quantity. Operators can use this function to quickly obtain key parameters required for testing, providing data references for formulating and adjusting test plans, thereby enhancing test preparation efficiency.

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