Multi-frequency Power Supply

Features and Performance Overview

1 Overview: The voltage transformer (PT) is a critical equipment in the power system, and the induction withstand test is essential to ensure the quality of the product meets

A critical test in accordance with national standards. The longitudinal insulation withstand voltage test for the turns, layers, sections, and phases of the PT winding is an important part of the PT insulation test. The longitudinal insulation test requires applying test voltages through a variable frequency power supply unit. Conducting an induced withstand voltage test on the PT can help staff identify issues promptly, preventing serious consequences.

Our multi-frequency induction withstand test device, produced with microcomputer control and designed with advanced variable frequency and high-speed sampling technology, boasts higher efficiency than traditional three-frequency generators. It features stable output voltage, high measurement accuracy, excellent repeatability, and can automatically increase voltage, start a timer after reaching a set value, and automatically reduce voltage upon completion of the timer. The operation is extremely simple. The instrument is equipped with a backlit large-screen LCD display, a full Chinese operating interface, a real-time clock, and a miniature printer. It employs an integrated structure, is lightweight, and easy to carry.

Notice: The step change of 0.1Hz in low resolution is not only applicable to the induction withstand test of PT, but also suitable for other occasions requiring variable frequency power supply.

Key Features:

Prevent Rise: When paired with a high-impedance capacitor voltage divider, it can directly monitor the high voltage on the primary side and automatically complete the dielectric withstand test.

Simple Operation: Features both automatic pressure increase via pressure regulation and manual pressure increase, with an optional frequency range of 30Hz to 200Hz for constant pressure output.

Comprehensive Protection: The instrument features complete over-pressure and over-current protection, both of which are customizable by the user.

Presenting Clarity: With a backlit large LCD screen, the display is clear and the operational interface is straightforward.

Print Fast: Equipped with a miniature high-speed thermal printer, the device can quickly print displayed content.

Real-Time Clock: Records the date and time of measurements and displays the current time on an LCD screen.

Data Storage: Can store 92 sets of data, and can overwrite once full.

Seismic Performance: Equipped with anti-seismic design, the instrument can withstand rough transportation without damage.

Key Technical Indicators

1. Working Conditions: Environmental Temperature: -10℃ to 50℃; Relative Humidity: 30% to 90%

2 Power Supply: Three-phase AC380V±10% or AC220±10% 50 Hz±5 Hz; if powered by AC220, the power is halved.

3 Output Frequency: 30Hz～200Hz, with fine adjustment of 0.1 Hz

Output Voltage: 30~350V Sinusoidal Wave

Output Power: 10KW

6 Output Voltages: 350V

7 Output Currents: 25A

8-voltage small resolution: 0.01V

9 Current Low Resolution: 0.001A

10 Voltage and Current Accuracy: ±1%

Dimensions: 430 (Length) × 310 (Width) × 340 (Height) mm

Approximate weight of the 12 instruments: 28kg