ABB FI820F 3BDH000031R1 serial field bus module
Table 6: Tests and standards
Test voltages - alarm and acknowledge/reset inputs to frame
- output relay contacts to frame
- auxiliary supply circuits to frame
- inputs, outputs and supply circuits between themselves
Dielectric test voltage
(IEC 60255-5)
2 kV, 50 Hz, 1 min
Impulse test voltage
(IEC 60255-5)
5 kV, 1.2/50 µs, 0.5 J
Disturbance tests HF test voltage (IEC 60255-6) 2.5 kV, 1 MHz
Environmental conditions Ambient service temperature
range
-10…+55°C
Ambient transport and storage
temperature range
-40…+70°C
Long term damp heat withstand
(IEC 60068-2-3)
<95%, +40°C, 56 d/a
Degree of protection by enclosure
when panel-mounted
IP 54
Weight ~4.5 kg

• Integrated three-phase differential relay,
three-phase overcurrent relay and multiconfigurable earth-fault relay
• Alarm channels activated by normally open
or normally closed contact
• Stabilized differential relay module providing winding short-circuit and interturn fault
protection for two-winding power transformers and generator-transformer units,
and interwinding short-circuit protection for
generators
• Earth-fault relay module providing protection for transformer HV and LV side according to the principle selected: stabilized
differential current principle, high-impedance principle, residual current principle or
neutral current principle
• Three-stage overcurrent module providing
protection for power transformers and generators and two-stage back-up earth-fault
protection
• Short operate time even at partial saturation of the current transformers
• Operation characteristic of differential relay
module easily adapted for different applications
• Stabilized against unwanted operations at
faults occurring outside the protected area
and at transformer inrush currents
• Second harmonic restraint for prevention of
unwanted relay operations at transformer
inrush currents
• Fifth harmonic restraint for prevention of
unwanted relay operations at transformer
overexcitation. The fifth harmonic restraint
can be aborted if the ratio of the fifth harmonic and the basic frequency component
rises too high at dangerous overvoltages