IEC 61800 is an international standard for adjustable speed electrical power drive systems (AS-EPS). It provides guidelines for the design, application, and testing of variable speed drives (VSDs), also known as frequency converters, which are used to control the speed of electric motors. The standard covers drives with a power range of 0.75kW to 1000MW, and voltage range of up to 1000V.

The standard covers a wide range of topics such as drive systems, protection devices, control devices, safety, and electromagnetic compatibility. It aims to ensure that the drive systems are designed and manufactured in a way that will prevent hazards to personnel and equipment, and will also ensure that the drive systems are reliable, efficient, and easy to use.

The standard also aims to provide guidance on the selection of VSDs based on the application, and to ensure that the VSDs are compatible with the other electrical equipment in the system.

IEC 61800 is widely used in the industry and is considered an important standard for the design, installation, and operation of variable speed drive systems.
 
Types of IEC 61800
IEC 61800 is an international standard for adjustable speed electrical power drive systems (AS-EPS) that covers several types of variable speed drives (VSDs), which are also known as frequency converters. The standard is divided into several parts, and each part covers a specific type of VSD. The parts of the standard are:

+ Part 1: General requirements
+ Part 2-1: AC adjustable speed electrical power drive systems (3 kW to > 375 kW)
+ Part 2-2: AC adjustable speed electrical power drive systems (375 kW to > 2500 kW)
+ Part 3-1: DC adjustable speed electrical power drive systems (3 kW to > 375 kW)
+ Part 3-2: DC adjustable speed electrical power drive systems (375 kW to > 2500 kW)
+ Part 4: AC adjustable speed electrical power drive systems for traction applications (3 kW to > 2500 kW)
+ Part 5-1: Drives for specific industrial processes (3 kW to > 375 kW)
+ Part 5-2: Drives for specific industrial processes (375 kW to > 2500 kW)

Each part of the standard specifies the requirements for the design, application, and testing of the VSDs that fall within the power and voltage ranges specified in the part. The standard covers topics such as drive systems, protection devices, control devices, safety, and electromagnetic compatibility. It also provides guidance on the selection of VSDs based on the application and to ensure the VSDs are compatible with other electrical equipment in the system.