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EN 61000-4-5 establishes test methods for evaluating the immunity of electrical and electronic equipment to surge transients. Surge events can result from switching activity, power-system disturbances, and indirect effects associated with lightning.

Clark Testing provides EN 61000-4-5 surge immunity testing for manufacturers and engineering organizations evaluating equipment as part of EMC compliance, product qualification, and design validation programs.

EN 61000-4-5 Immunity Testing

Electrical and electronic equipment can be exposed to short-duration, high-energy electrical disturbances through power and signal connections. EN 61000-4-5 provides a standardized method for applying controlled surge transients and evaluating how equipment responds.

Testing may include:

• Surge immunity testing
• Power-line surge testing
• Signal and interconnection line testing
• Positive and negative polarity surges
• Equipment functional monitoring
• Performance evaluation during exposure
• Post-test functional verification

The applicable test levels, coupling methods, repetition rates, and performance criteria depend on the equipment, connection being evaluated, and qualification requirements.

Electrical Surge Testing

Surge testing is intended to simulate transient overvoltage conditions that equipment may encounter in its operating environment.

During testing, controlled surge pulses are applied to specified equipment ports using appropriate coupling methods. The equipment can be operated and monitored during exposure to determine whether the transient causes unacceptable degradation, malfunction, reset, damage, or loss of functionality.

Testing can help manufacturers identify weaknesses in power-input protection, interfaces, grounding, insulation, and other areas of a product design before deployment.

Combination Wave Surge Testing

EN 61000-4-5 commonly uses a combination wave generator to produce standardized voltage and current waveforms.

The test configuration is selected according to the type of port being evaluated and the applicable requirements. Coupling and decoupling networks may be used to apply the surge to the equipment while controlling how the transient enters the test circuit.

Clark can work with customers to establish the appropriate test configuration, equipment operating modes, monitoring requirements, and acceptance criteria before testing begins.

EMC Immunity and Equipment Qualification

EN 61000-4-5 surge testing is frequently one element of a broader EMC immunity program. Equipment may need to demonstrate immunity to several different electromagnetic disturbances depending on its application.

Clark Testing supports EMC qualification programs involving testing such as:

• Surge immunity
• Electrical fast transients and bursts
• Electrostatic discharge
• Radiated RF immunity
• Conducted RF immunity
• Power-frequency magnetic fields
• Voltage dips and interruptions
• Conducted and radiated emissions

Coordinating these requirements through a broader EMC program can help manufacturers efficiently evaluate equipment against multiple applicable standards.

EN 61000-4-5 Testing at Clark Testing

Clark Testing works with manufacturers, suppliers, and engineering organizations to support EMC testing and product qualification programs.

Our team can review the equipment configuration, applicable EN 61000-4-5 requirements, ports to be evaluated, test levels, operating modes, monitoring requirements, and performance criteria to develop an appropriate test approach.

Contact Clark Testing to discuss EN 61000-4-5 surge immunity testing or a broader EMC/EMI qualification program.