Overcurrent protectors – WIKA 851 User Manual
Page 10
WIKA operating instructions magnetic snap-action contact model 821
GB
10
2003325.03 03/2011 GB/D/F/E
4. Overcurrent protectors
4. Overcurrent protectors
The instruments do not provide for incorporated overcurrent protectors.
Should protectors be required, we recommend the following values in
accordance with EN 60947-5-1.
Table 3a: Overcurrent protectors with magnetic snap-action contact
Table 3b: Overcurrent protectors with sliding contact
Voltage
Magnetic snap-action contact model 821
Switch version S
1)
Switch version L
1)
V
Nominal size of instrument
63
100
160
Nominal size of instrument
63
100
160
24
1 A
2 A
2 A
0.63 A
1 A
1 A
250
0.63 A
1 A
1 A
0.315 A
0.63 A
0.63 A
Voltage
Sliding contact model 811
Switch version S
1)
Switch version L
1)
V
Nominal size of instrument
63
100
160
Nominal size of instrument
63
100
160
24
0.63 A
1 A
1 A
0.315 A
0.63 A
0.63 A
250
0.125 A
0.315 A 0.315 A 0.063 A
0.125 A 0.125 A
All data refer to miniature fuses M and a maximum short circuit current
of 100 A.
1) see chapter "5. Allocation of switch version to basic instruments and measuring ranges".