MEAN WELL PM-05-12 [7/32] The difference between mopp and moop in iec 60601 1

The Difference between MOPP and MOOP in IEC 60601-1 3

In 2005, the International Electrotechnical Commission (IEC) published the third edition of medical safety

standard (IEC60601-1: 2005), to replace the original second edition (IEC60601-1: 1998). The main difference

between the 2

edition and 3rd edition is the insulation level. The 2

edition is divided into BI (Basic Isolation),

SI (Supplementary Isolation), DI (Double Isolation) and RI (Reinforced Isolation), and the 3

edition of new

IEC60601-1 is divided into two categories of MOPP and MOOP.

The major impact of 3

edition is the distinction made between operator and patient. As result, Means of

Protection (MOP) was introduced and it is further categorized into 2 different classifications, which are Means

of Patient Protection (MOPP) and Means of Operator Protection (MOOP).

It is the responsibility of the medical product manufacturer to determine the likelihood of a patient coming into

contact, and decide whether patient protection (MOPP) or operator protection (MOOP) to use. If the medical

devices come into contact with patients, they must meet the insulation requirements of MOPP.

In either case, the insulation between PRIMARY to SECONDARY must meet at least 2 x MOP and at least

1 x MOP between PRIMARY to protective earth (FG) at normal conditions. It is shown on Figure 1.

A power supplies that meet 2 x MOPP standards provide the highest level of protection. It can be advantageous

to specify a 2 x MOPP power supply because it can cover most of medical applications.

Ultrasound Scanner

Medical Bed

Operation Room

Ambulance

2xMOPP/MOOP

Secondary

1xMOPP/MOOP

Primary

AC/L

-V

AC/N

Figure 1