Power factor correction systems in steel cabinets
LSFC series
Description
Package automatic power factor correction systems in freestanding
sheet steel cabinets. If required, also available with blocking filters
for low voltage networks with a high proportion of harmonics.
Power range
100 to 400 kVAr
Design
Cabinet with door and eyebolts for lifting, manufactured in sheet
steel painted in DIN shade RAL 7032, ventilation via air inlet filter
in cabinet door and outlet in top of cabinet, built-in electric fan if
necessary. Modular construction combining up to four Type C
capacitor modules.
Components in cabinet:
” Self-healing power capacitors with low-loss polypropylene film
dielectric and PCB-free filler, LKT series with discharge resistors
to VDE 0560 Parts 46 + 47, IEC 60831-1 and .2 (EN 60831-1
and .2).
” Heavy duty capacitor contactors
” Fuse links, 3-pole, size NH00
” Busbar system
” Control terminal strip with control circuit fuse and thermal trip
contact
” RM 9606 or EMR 1100S reactive power control relays (not with
LSFCZ units)
” If required, fan at top of cabinet, air inlet filter and temperature
controller
” If required, low-loss blocking reactors with thermal trips
Installation site
The location where the cabinet is installed must comply with the
requirements of the ingress protection and ambient temperature
concerned.
Regulations
VDE 0100, VDE 0105, VDE 0560 Part 46 and VDE 0106 Part 100
(German Association of Electrical Engineers) regulations must be
complied with when installing and connecting up power capacitors
in Germany. In other countries the equivalent local regulations
must be followed.
System expansion
The easy-to-maintain design simplifies the task of extending existing
installations, since it is only a matter of installing additional capacitor
modules. If the required power rating is more than 400 kVAr,
every basic unit can be extended by the addition of LSFCZ...
extension units (without control relays).
The basic units are equipped with RM 9606 (suffix .606) or EMR
1100S (suffix .111) reactive power control relays.
All system types can also be supplied with EMR 1100 (suffix .112)
control relays.
Connections
The power supply cable and the
current transformer cable enter
the bottom of the cabinet through a sliding gland plate and a cable
clamp rail, the power supply being connected to the busbar system
and the
current transformer cable to the terminal strip provided.
Note
The harmonics generated within a low voltage network and those
fed in from the medium voltage network can be amplified many
times over due to resonance with the inductive and capacitive
reactances active in the low voltage network. In particular, in
industrial installations with loads that generate harmonics, network
compatibility should first be checked, and if appropriate, power
factor correction systems with blocking filters installed.
