Siemens SIPROTEC 7XR81 Manual page 56

7XR87 Voltage Divider for Excitation Voltage
4.5 Electrical Tests
4.5 Electrical Tests
Standards
4.5.1
IEC 60255 (product standard)
Additional standards are listed for the individual tests.
Installation Requirements
4.5.2
Overvoltage category
Degree of pollution
Protection class
Insulation and Safety Tests
4.5.3
Standards
Voltage test (routine test)
Voltage test (routine test)
Surge immunity test (type testing), all circuits
Insulation resistance
Resistor of protective equal-potential-bonding
NOTE
i
i
For the insulation tests of the generator according to IEC60034-1 or IEEE421.3, the device has to be discon-
nected from the generator if the applied voltage is higher than the values shown here.
EMC Immunity Tests (Type Tests, Test under Mounting Conditions)
4.5.4
See 1.6.4 EMC Immunity Tests (Type Tests, Test under Mounting Conditions)
56
III
2
1
IEC 60255-27
DC 2.8 kV, 1 s (output)
DC 4.8 kV, 1 s (input)
8 kV (peak value), 1.2 µs/50 µs, 0.5 J
3 positive and 3 negative impulses at intervals of 1 s
> 100 MΩ @ DC 500 V
< 0.1 Ω @ DC 12 V, 30 A after 1 min
for 7XR81.
SIPROTEC, Coupling Units for Generator Protection, Manual
C53000-H5040-C072-1, Edition 09.2018