Schaffner Group
User and Installation Manual
LCL Filter
May 2018
11/21
3. Filter description
3.1 General electrical specifications of LCL filter FN 6840
Nominal operating voltage:
max. 480 VAC
Rated operating voltage:
max. 530 VAC
Operating frequency:
50/60 Hz
AFE/AIC Switching frequency:
3 kHz up to 10 kHz
Rated currents:
25 to 380 A
Rated inductance L2 (inverter/converter side):
8% @ 400V, 50 Hz and rated current
Rated inductance L1 (grid/line side):
4% @ 400V, 50 Hz and rated current
Overload capability:
1.6 x rated current for 1 min., ones per hour
Filter performance:
Prerequisite: Grid supply by insulated transformer
Remaining ripple current
1)
:
< 5% (max. ripple
pk-pk
vs. fundamental
pk-pk
)
Line impedance:
L
grid
≥ 1%
THDi
2)
:
≤ 5% acc. EN61000
-3-12
High potential test voltage:
3)
P
E 2480 VAC (1s)
Protection category:
IP 00 (IP20 on request)
Ambient temperature range:
-25°C to +45°C fully operational
>45°C to +70°C derated operation
4)
-25°C to +85°C transportation and storage
Flammability class:
UL 94V-2
Insulation class of magnetic components:
N (200°C)
Creepage and clearance distances:
According UL61800-5-1
Design corresponding to:
Filter: UL61800-5-1, EN61800-5-1
Chokes: EN61558-2-20 or EN60076-6
Temperature monitor output contact:
Thermal switch NC 180° C (UL-approved) to detect
overtemperature of chokes
1) for detailed resulting ripple current, please contact your local Schaffner office or partner.
2) the THDi acc. EN61000-3-12 or IEEE519 is not required for AFE applications as those standards refer to the harmonics of the
grid frequency generated by e.g. 6-pulse recifires.
3) Repetitive tests to be performed at max. 80% of above levels, for 1 second.
4) Iderated = Inominal
×√((70°C
-Tamb)/20°C)
3.2 Additional electrical specifications
LCL filters general electrical specifications refer to operating altitudes up to 2000m a.s.l. (6600ft).
Operation between 2000m and 4000m (6600ft and 13123ft) requires a derating for current and voltage:
- The voltage has to be de-rated because clearance between live parts has to be
increased acc. EN/IEC 60664-1
- The current has to be de-rated due to the reduced power dissipation at higher altitude.
Table 1: Altitude correction factors
Note:
Do not use LCL filters in altitudes above 4000m without consulting Schaffner first.
INS 1008766 A0
INS 1008766 A0
INS 1008766 A
