IEC 61326-1 is an international standard that specifies EMC (Electromagnetic Compatibility) requirements for electrical equipment used in measurement, control, and laboratory applications. This standard ensures that such equipment operates reliably in various electromagnetic environments without causing or experiencing interference.
IEC 61326-1 Testing Overview
IEC 61326-1 defines test procedures and limits for immunity and emission requirements for electrical equipment, ensuring compliance with regulatory and industrial standards.
1. Immunity Testing (Resistance to External Disturbances)
The immunity tests ensure that the equipment can function correctly under electromagnetic disturbances. The key immunity tests include:
- Electrostatic Discharge (ESD) Test – IEC 61000-4-2
- Radiated Electromagnetic Field Immunity Test – IEC 61000-4-3
- Electrical Fast Transient (EFT) Burst Immunity Test – IEC 61000-4-4
- Surge Immunity Test – IEC 61000-4-5
- Conducted RF Disturbance Immunity Test – IEC 61000-4-6
- Power Frequency Magnetic Field Immunity Test – IEC 61000-4-8
- Voltage Dips and Short Interruptions Immunity Test – IEC 61000-4-11
2. Emission Testing (Interference Caused by Equipment)
The emission tests ensure that the equipment does not generate excessive electromagnetic interference (EMI). Key tests include:
- Radiated Emissions – CISPR 11
- Conducted Emissions – CISPR 11
Categories of Equipment under IEC 61326-1
IEC 61326-1 classifies equipment based on intended use and electromagnetic environment:
- Industrial locations (high electromagnetic disturbances)
- Controlled (laboratory) environments (low disturbances)
- Portable equipment (subject to higher interference)
- Fixed equipment (installed in fixed locations)
Who Needs IEC 61326-1 Testing?
- Manufacturers of measurement, control, and laboratory equipment
- Industries such as medical, industrial automation, and scientific research
- Companies exporting electrical/electronic devices to global markets