bowen@harchin.com
Gaodian Electric Power Co., Ltd

High Voltage Test Equipment

Series Resonant Test System

Variable frequency series resonant test set with compact size, real-time status display, adjustable test voltage, frequency range and dwell time, automatic capacitance calculation and 0.1 Hz frequency resolution. Resonant tuning lets a modest supply drive the large capacitive load of long cables and generators.

Series Resonant Test System
Standards
IEC 60502 · GB/T 12706
Applications
Cable AC withstand test · Generator test · Substation commissioning

Overview

Variable frequency series resonant test set with compact size, real-time status display, adjustable test voltage, frequency range and dwell time, automatic capacitance calculation and 0.1 Hz frequency resolution. Resonant tuning lets a modest supply drive the large capacitive load of long cables and generators.

Applicable Standards

  • IEC 60502
  • GB/T 12706

Application Scenarios

Cable AC withstand testGenerator testSubstation commissioning

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Frequently Asked Questions

Why use a series resonant test system instead of a conventional hipot set?
Long cables and large generators present a heavy capacitive load. A conventional test transformer would need a very large kVA rating to supply the charging current. A resonant system tunes the circuit so the reactor and the load capacitance exchange energy, letting a much smaller supply drive the same test voltage.
What does "variable frequency" mean here?
The system adjusts its output frequency to find the resonant point for the capacitive load, with 0.1 Hz resolution. It calculates the load capacitance automatically and lets the operator set test voltage, frequency range and dwell time.
What is this system typically used for?
AC withstand testing of power cables, generator stator windings and substation primary equipment during commissioning, following IEC 60502 and GB/T 12706 for cables.

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