14 LV compens cubic guide, Instrukcje, Schneider Electric, LV

Guide for the design
and production
of LV compensation cubicles
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                          Guide for the design
and production
of LV compensation cubicles
Power
Type of compensation
Optimisation
of a correction cubicle
control
Design of
a correction cubicle
Design using P400
power factor correction
modules
P400 standard
and overrated type
P400 DR
Design using
components
Capacitors
Contactors
Detuned reactors
Installation in a cubicle
Environmental
conditions
Control
and monitoring system
Protection
and connection rules
Factory tests
Schneider
 Contents
Chapter
Page
Definition of power and type of compensation
Definition of power
1
6
Choice of equipment type
7
Choice of detuned reactor tuning frequency
8
Optimisation of a correction cubicle control
Choice of control
c electrical steps and physical steps – the step combinations
2
10
c the control programmes – calculating the number of electrical steps and electrical control
11
c calculation example
12
Design using P400 power factor correction modules
Avantages of the power factor correction modules
3
13
The prewired power factor correction modules
14
Vocabulary
15
P400 power factor correction modules, standard and overrated type
16
c installation in the cubicle
17
c electrical connection
22
c optimisation table
23
c ventilation
25
c range and catalogue numbers
26
c quotation assistance
27
DR P400 power factor correction modules
28
c installation in the cubicle
29
c electrical connection
30
c optimisation table
31
c ventilation
32
c range and catalogue numbers
33
c quotation assistance
34
Design using components
Choice of capacitors
4
36
Choice of contactors
38
Choice of DR detuned reactors
39
Installation in the cubicle
42
Ventilation
44
Environmental conditions
Operating temperature, humidity, pollution, altitude
5
46
Control and monitoring system
R6, R12 and RC12 power factor controllers – general and connection
6
48
Installation recommendations
51
Auxiliary circuits
52
Equipment protection and connection rules
Choice of protective devices: circuit-breakers, fuses, power cables
7
54
Factory tests
The means
8
58
The tests
59
List of inspections
61
Final inspection report
62
1
Schneider
 Production of a LV compensation
cubicle
In addition to the rules and standards
concerning production of electrical
switchboards the LV correction switchboards
require the consideration of specific
constraints.
The compensation modules
c
Mounted, pre-cabled and tested
in the factory.
c
The capacitors
(see page 36)
Their positioning must ensure proper ventilation.
Their sizing must take into account ambient
conditions (harmonics, temperature, etc.).
Adaptation in all cubicle types.
c
Perfect association of components.
The contactors
(see page 38)
They must be suited to capacitor control.
Some manufacturers (e.g. Telemecanique) have
designed and tested specific contactors for this
application.
Their control voltage must be monitored in order
to prevent rapid reclosing.
The detuned reactors (DR)
(see page 39)
They must be chosen according to harmonic
stresses and installed in order to avoid, as far as
possible, capacitor temperature rise.
2
Schneider
Key points
Ventilation
(see page 44)
It must be efficient in order to keep operating
temperature lower than maximum permissible
temperature of components
v
arlogic R6
The power factor controller
(see page 47)
Its functions must be adapted to the capacitor bank
characteristics: number and power of steps,
sequence, etc.
The time delay must be adapted to capacitor
discharge time.
+
–
e
sc.
ent.
Low voltage network
Network characteristics, and in particular network
harmonic pollution, must absolutely be taken into
account when choosing capacitors and detuned
reactors (if any).
3
Schneider

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