Basic Versus Reinforced Insulation - HBM Genesis series Technical Note

HBM public
GN610, GN611 Isolation and type testing
1.2

Basic versus reinforced insulation

For reference below one can find the basic insulation and supplementary
insulation as well as the reinforced insulation test values for CATII.
Table 1.2: Test voltages for testing electric strength of solid insulation in
measuring circuits of measurement category II (IEC 61010
Nominal
voltage line to
neutral a.c
r.m.s. or d.c. of
MAINS being
measured. (V)
≤ 150
> 150 ≤ 300
> 300 ≤ 600
> 600 ≤ 1000 3310
To protect a user from hazardous voltages there are several means of
protection possible. As one can see below basic insulation + supplementary
insulation is a possibility but also reinforced isolation is a means of protection.
The test voltages are different per means as can be found in the above table.
Test voltage
5 s a.c. test V a.c. r.m.s.
Basic Reinforced
insulation and insulation
supplementary
insulation
840 1390
1390 2210
2210 3510
5400
- 2 - 30:2010)
Impulse test V peak
Basic Reinforced
insulation and insulation
suplementary
insulation
1550 2500
2500 4000
4000 6400
6000 9600
5