Combination Wave Surge Test System | VS-FHB

Products Details

Lightning surge and switching transient disturbances are common sources of electromagnetic interference in electrical and electronic systems. Indirect lightning strikes, lightning-induced voltage on external lines, nearby ground current, power system switching, capacitor bank operation, thyristor switching, and grounding faults may all introduce high-energy pulses into power lines, I/O lines, and communication lines. Surge immunity testing provides a repeatable way to evaluate whether equipment can continue operating or recover properly after such disturbances.

The VS-FHB Combination Wave Surge Test System is designed to provide a controlled surge disturbance source for EMC immunity evaluation. It is based on the 1.2/50 us and 8/20 us combination wave used in IEC 61000-4-5. The generator output is defined by open-circuit voltage and short-circuit current performance, allowing laboratories to test equipment under standardized surge conditions.

The instrument supports open-circuit surge voltage from 0.5 kV to 6 kV with positive, negative, or alternating polarity. The corresponding short-circuit current range is 0.25 kA to 3 kA. For direct generator output, the equivalent output impedance is 2 ohm, matching the combination wave generator requirement for many power-line and short-distance interconnection surge tests.

A built-in three-phase coupling/decoupling network allows surge pulses to be coupled onto EUT power lines while reducing reverse injection into the power supply network. The CDN supports three-phase 380 V ±10%, 32 A max EUT power capacity. The instrument supports line-to-line differential mode coupling and line-to-ground common mode coupling, helping users apply surge tests to common AC or DC power input configurations.

The VS-FHB provides flexible injection control. Surge injection can be asynchronous, synchronous, or phase-gradient controlled. In synchronous mode, the injection phase angle can be set from 0° to 359° in 1° steps. Surge trigger count can be set from 1 to 99999 times, and interval time can be set from 20 to 99999 seconds. This makes the system suitable for both standard compliance testing and customized engineering verification.

The instrument uses a true color LCD with a four-wire resistive touch screen. Users can set voltage, polarity, phase, trigger count, interval, coupling mode, EUT power state, trigger mode, and multi-step test parameters from the interface. Parameter files can be saved, imported, exported by USB, or managed through the built-in file system. Ethernet communication is available for PC software control when required.

Specification

Technical Parameters
Item	Specification
Product model	VS-FHB
Product type	Combination Wave Surge Test System / Lightning Surge Generator
Applicable standards stated in manual	GB/T 17626.5-2008, IEC 61000-4-5:2004, EN 61000-4-5
Surge waveform	1.2/50 us combination wave
Open-circuit voltage waveform	1.2 us ±30% / 50 us ±20%
Short-circuit current waveform	8 us ±20% / 20 us ±20%
Polarity	Positive, negative, positive/negative alternating
Output impedance	2 ohm
Open-circuit output voltage peak	0.5 kV to 6 kV ±10%
Short-circuit output current peak	0.25 kA to 3 kA ±10%
Surge trigger count	1 to 99999 times
Surge interval	20 to 99999 s
Phase injection mode	Asynchronous, synchronous, phase-gradient
Synchronous phase angle	0° to 359°, 1° step
Coupling/decoupling network capacity	Three-phase 380 V ±10%, 32 A max
Coupling setting output mode	Automatic
Line-to-line coupled open-circuit voltage	0.5 kV to 6 kV ±10%
Line-to-line coupled short-circuit current	0.25 kA to 3 kA ±10%
Line-to-ground coupled open-circuit voltage	0.5 kV to 6 kV ±10%
Line-to-ground coupled short-circuit current	41.6 A to 500 A ±10%
Line-to-line voltage wave at CDN EUT port	1.2 us ±30% / 50 us +10 us / -15 us
Line-to-line current wave at CDN EUT port	8 us ±20% / 20 us ±20%
Line-to-ground voltage wave at CDN EUT port	1.2 us ±30% / 50 us +10 us / -30 us
Line-to-ground current wave at CDN EUT port	2.5 us ±30% / 25 us ±30%
Residual surge on non-surged power line	Not more than 15% of applied voltage
EUT power input/output	L1, L2, L3, N, PE
Working power supply	AC 220 V ±10%, 50/60 Hz
Operating temperature	-5°C to +50°C
Relative humidity	≤70%
Atmospheric pressure	86 kPa to 106 kPa
Display	True color LCD with four-wire resistive touch screen
USB interface	USB Host for software update and parameter import/export
Communication	RJ45 Ethernet interface
Dimensions	480 mm × 550 mm × 830 mm
Weight	50 kg

Product Guide

Before using the VS-FHB, the operator should confirm the applicable product standard, test level, EUT power type, coupling mode, surge polarity, surge voltage, phase injection mode, number of pulses, and interval time. The test configuration should follow IEC 61000-4-5 or the relevant product standard so that the results remain comparable and repeatable.

Grounding is essential. Connect the front-panel grounding terminal to the reference ground plane with a short and thick conductor before connecting the EUT or running any surge test. Because high-voltage surge pulses are applied to terminals during testing, all wiring changes should be made only when the generator is stopped and the EUT power is disconnected.

For EUT power-line testing, connect the EUT power input cable to the instrument’s EUT POWER IN terminal and connect the EUT output lines through L1, L2, L3, N, and PE. If the EUT uses DC power, the manual specifies using L1 as DC positive input and N as DC negative input. Before enabling EUT power, confirm that the selected EUT type, AC or DC, matches the actual input power configuration.

Enter the surge parameter setting interface from the touch screen. Set the starting voltage, ending voltage, step value, polarity, injection phase, trigger count, interval time, trigger mode, and coupling mode. Output can be configured as power-line output or direct output. For power-line output, select differential mode or common mode coupling as required by the test plan.

When the test starts, the instrument enters the surge running interface. It supports stop, run, and pause states. In automatic mode, the generator outputs pulses according to the selected sequence. In manual trigger mode, the system pauses before each surge and waits for the operator to continue. The PULSE indicator gives warning before surge output.

After the test is complete, turn off EUT power, stop the instrument, and then turn off the main power. For long pauses or after testing, EUT power should be disconnected to reduce unnecessary stress on internal components. Test results should be evaluated according to the EUT performance criteria defined by the product standard, manufacturer, customer, or test plan.

Features

• Supports lightning surge immunity testing according to IEC 61000-4-5 and GB/T 17626.5.
• Generates 1.2/50 us open-circuit voltage and 8/20 us short-circuit current combination waves.
• Provides adjustable open-circuit output voltage from 0.5 kV to 6 kV.
• Provides short-circuit current from 0.25 kA to 3 kA.
• Supports positive, negative, and alternating polarity output.
• Provides 2 ohm equivalent output impedance for direct surge output.
• Includes built-in three-phase coupling/decoupling network.
• Supports line-to-line differential mode and line-to-ground common mode coupling.
• Provides asynchronous, synchronous, and phase-gradient surge injection modes.
• Allows synchronous phase angle setting from 0° to 359° in 1° steps.
• Supports 1 to 99999 surge trigger counts.
• Supports 20 to 99999 s interval setting between surges.
• Provides automatic and manual trigger modes.
• Includes color touch-screen interface for parameter setting and operation.
• Supports USB parameter import/export and software update.
• Provides Ethernet communication interface for PC connection.
• Includes direct MONITOR surge output for waveform verification or direct surge testing.
• Supports Chinese and English language selection.

Application Scenarios

The VS-FHB is suitable for EMC immunity laboratories that perform surge tests on electrical and electronic products. It provides standardized combination wave output, coupling/decoupling, phase injection, and programmable test parameters for compliance and engineering tests.

For product manufacturers, the system can be used during design verification and pre-compliance testing. Engineers can check whether power supplies, control boards, industrial controllers, protection circuits, and communication equipment can withstand surge events before submitting products for certification.

For power and industrial equipment suppliers, the VS-FHB helps evaluate equipment exposed to power-line switching transients and indirect lightning effects. Products installed in substations, factories, outdoor cabinets, control rooms, and distributed power systems often require surge immunity verification.

For third-party testing organizations, the instrument supports repeatable surge application with stored parameter files, automatic output sequencing, and standard coupling modes. The built-in three-phase CDN makes it practical for testing AC-powered equipment with different line coupling combinations.

For system-level testing, the direct MONITOR output and specified shielded-line configurations can support surge injection to enclosures, cable shields, or potential-difference test setups when required by the relevant standard or project test method.

Applications

The VS-FHB Combination Wave Surge Test System is used by EMC laboratories, electrical product manufacturers, power equipment companies, industrial control system suppliers, communication equipment manufacturers, certification laboratories, research institutes, and quality inspection departments.

Typical EUTs include AC/DC power supplies, industrial control devices, meters, relay protection equipment, automation controllers, communication terminals, household electrical products, power distribution equipment, electronic modules, and equipment connected to low-voltage power networks.

For international B2B SEO, the product can be described as a combination wave surge generator, lightning surge immunity tester, IEC 61000-4-5 surge test system, EMC surge generator, 1.2/50 us surge generator, 8/20 us current surge tester, and three-phase surge immunity test system.

Customer Case

An industrial control equipment manufacturer needed to verify surge immunity before sending a new controller series to a third-party EMC laboratory. The product used a three-phase power input and several shielded communication cables, so the engineering team needed a test system that could apply standard surge pulses to power lines and support flexible parameter settings.

The manufacturer used the VS-FHB Combination Wave Surge Test System during internal pre-compliance testing. Engineers connected the EUT power through the built-in coupling/decoupling network, selected line-to-line and line-to-ground coupling modes, and configured 1.2/50 us combination wave output at the required test levels. For synchronous injection, the phase angle was set through the touch-screen interface.

During testing, the team adjusted surge polarity, trigger count, interval, and coupling sequence according to the test plan. When abnormal operation appeared at one surge level, the engineers reviewed the test condition and modified the input protection circuit. After design adjustment, the controller passed the same surge sequence with normal recovery behavior.

The VS-FHB helped the customer identify weaknesses before formal certification, reduce repeated external laboratory time, and build a more reliable surge immunity verification workflow for future products.

FAQ

• What is the VS-FHB used for?
  It is used for lightning surge immunity testing and switching transient simulation on electrical and electronic equipment according to IEC 61000-4-5 and related standards.
• What surge waveform does it generate?
  It generates a 1.2/50 us open-circuit voltage and 8/20 us short-circuit current combination wave.
• What is the maximum surge voltage?
  The open-circuit output voltage range is 0.5 kV to 6 kV with ±10% tolerance.
• What is the maximum short-circuit current?
  The short-circuit output current range is 0.25 kA to 3 kA with ±10% tolerance.
• Does it include a coupling/decoupling network?
  Yes. It includes a built-in three-phase coupling/decoupling network rated for 380 V ±10%, 32 A max EUT power.
• What coupling modes are supported?
  It supports line-to-line differential mode coupling and line-to-ground common mode coupling through the power-line output. It also provides direct surge output.
• Can the surge be synchronized to AC phase angle?
  Yes. Synchronous injection angle can be set from 0° to 359° in 1° steps. Asynchronous and phase-gradient injection modes are also supported.
• Can users save or import test parameters?
  Yes. Parameter files can be saved internally, imported or exported through USB, and managed from the file interface.
• What interfaces are available?
  The instrument provides USB Host for update and parameter transfer, plus RJ45 Ethernet communication for PC connection.
• What safety precautions are important?
  The instrument must be properly grounded, wiring should only be changed when the system is stopped and EUT power is off, and users should not operate it with wet hands or in high humidity.

Weshine Advantages

Weshine Electric provides EMC test equipment and electrical testing solutions for laboratories, manufacturers, power equipment suppliers, industrial users, and inspection organizations. For the VS-FHB Combination Wave Surge Test System, Weshine supports customers with model selection, test configuration guidance, technical parameter confirmation, documentation, and after-sales service.

Surge immunity testing requires repeatable waveforms, correct coupling, safe grounding, and clear parameter control. The VS-FHB helps users perform IEC 61000-4-5 surge testing with adjustable voltage, polarity, phase, trigger sequence, built-in three-phase CDN, touch-screen operation, USB parameter management, and Ethernet communication.

For overseas buyers and distributors, Weshine can provide product information and application support for EMC laboratory setup, product compliance testing, tender preparation, training, and resale. The VS-FHB is suitable for customers looking for a practical combination wave surge generator for lightning surge immunity testing.