Securing your
electrical installations
Prisma P
up to 3200 A
type tested LV switchboard solutions
Table of contents
Electrical switchboards up to 3200 A
.................................................................... 3
A complete safety of type tests
.................................................................... 4
Choice of Prisma P enclosures
.................................................................... 5
Prisma P several configurations
.................................................................... 6
Schneider products inside Prisma
.................................................................... 8
General technical information
.................................................................... 9
Electrical switchboards
Up to 3200 A
With the Prisma P system, Schneider Electric proposes highperformance technical solutions, with enhanced robusteness,
looks and aesthetics to produce low voltage electrical
switchboards up to 3200 A, in commercial and industrial
buildings.
From the simplest through to the highly sophisticated, these
simple yet dependable solutions are tailored to meet customers’
needs. The modular building blocks are designed with a strict
eye on details to ensure a professional result.
Prisma switchboards capitalize on the experience gained over
30 years, during which thousands of switchboards have been
built and operated.
Prisma electrical switchboards
For a dependable electrical installation
Total compatibility between Schneider Electric
switchgear devices and the Prisma system helps
build dependability into every electrical installation,
that has been validated by type tests in compliance
with standard IEC 60439-1.
An electrical installation capable of evolving
Modular in structure, Prisma can keep pace with
evolving switchboard needs and integrate new
functional units as required. Maintenance operations
are fast and easy with total access to all switchgear
devices.
Total safety for users
Switchgear devices are installed behind a protective
front plate that leaves only the operating handle
visible.
General characteristics
Enclosure
■ material: sheet steel, anti-corrosion painting
■ surface treatment: anti-corrosion coating, thermal polymerised
polyester-epoxy powder. Colour Prisma beige / dark grey.
■ busbar insulating supports: all plastic parts withstand fire or
excessive heat caused by internal electrical phenomena, as per
IEC 695-2.1: 960° 30s/30s for supports for live metal parts.
Building up installations
Functional Prisma components can be used to build switchgear
assemblies in compliance with: standards IEC 60439-1.
■ with the following electrical specifications:
p rated insulation voltage for the main busbars: 1000 V
p rated current 3200 A
p peak withstand current: Ipk 187 kÂ
p short time withstand current: Icw 85 kA rms / 1sec
p frequency 50 / 60 Hz.
Prisma P functional system
With the Prisma P cubicles, the same
components, whether for switchgear installation,
current distribution, cable running, etc., may be
installed depending on the installation site, with
the following varieties:
IP 31, IP 54
may be dismantled
may be joined side by side
4 basic widths: 700, 900, 1100, 1300 mm
2 basic depths: 400, 600 mm and 2 back to
back depths: 800, 1000 mm
■ frame height: 2000 mm
■
■
■
■
■
3
A complete safety of type tests
A dual guarantee
The Prisma switchboard, tested and produced according to standards, offers
its operator a dual guarantee:
■ use of dependable components, with platform tested assemblies,
■ rigorous final inspection.
IEC standard 60439-1
Schneider Electric offers Prisma switchboard series on which the 7 type
tests have been conducted.
defines 7 type tests and
Schneider Electric’s Certified Prisma Partners, who assemble & test the
Prisma switchboard, also attest to quality by carrying out the 3 individual
routine tests specified in the international standard IEC 60439-1.
which offer the best
These 10 tests guarantee the switchboard’s operational safety, as well as the
safety of people and equipment from switchboard commissioning onwards
and throughout switchboard service life.
3 individual routine tests
long term safety and
reliability guarantees to
electrical installation.
10 tests to certify installation quality
■ 7 type tests conducted on Prisma P which are:
1- temperature rise limit,
2- dielectric properties,
3- short-circuit withstand,
4- protection circuit efficency,
5- clearances and creepage distance,
6- mechanical operation,
7- degree of protection.
tion
Certifica
This is
that
XXX
■ Certified Prisma Partners attest to the quality of each switchboard by carrying
out the 3 individual routine tests specified in the international standard IEC 60439-1:
1- cabling and electrical operation,
2- dielectric testing,
3- protection measures.
7 type tests
conducted in the
laboratory
+
=
4
to certify
3 routine tests carried
out by Certified Prisma
Partner
a 100 % validated
switchboard
in Egypt
ctr ic mbly and
der Ele
Schneint for the design, asse
ibution
rtner for
agreeme
power distr
voltage
boration
isma Pa
em:
is a Pr technical colla type tested low functional syst
a
wing
and has
trol of the
the follo
quality con oards using
switchb
a ranges
Prism
39-1 and
IEC 604
g
ent as per tric incorporatin
r equipm
tests thei of Schneider Elec
mbles &
tices
igns, asse
ign prac
XXX des the latest des
in line with
Abbal
FredericDirector
Africa
Managing
North East
Egypt &
2006
on: 01/01/ 2006
Issued
31/12/
Valid thru:
Building
a New Electr
ic World
Choice of Prisma P enclosures
Depth = 400 mm cubicles
(1)
700
700
200
W = 900 mm
W = 700 mm
(1)
200
70
700
200
or
700
400
80
W = 1100 mm
(1)
200
700
(1) The cable or bar duct
can be installed on the
right or left side of the
frame in which the devices
are mounted.
400
W = 1300 mm
(1)
Depth = 600 mm cubicles
700
700
W = 700 mm
200
W = 900 mm
(1)
200
700
200
or
700
400
W = 1100 mm
(1)
200
700
(1) The cable or bar duct
can be installed on the
right or left side of the
frame in which the devices
are mounted.
400
W = 1300 mm
Depth = 800 / 1000 mm (back to back) cubicles
A depth of 800 or 1000 is obtained by
installing the basic frames in all existing
widths back to back.
In the back to back layout, cubicle sides
are covered by normal end panels
according to the combination.
D = 800 mm
D = 1000 mm
Two basic frames side by side
Two basic frames of different depths
can be joined directly together.
+
Two basic frames
5
Prisma P
several configurations
Upper horizontal basbar
Breaker with incoming top busduct.
Breaker with incoming top cables.
6
Incoming circuit breaker
Breaker with bottom cable connection.
Outgoing functional units
Cable compartment
Cable tie bars in width 200 and 400 mm.
7
Schneider products inside Prisma
Prisma P switchboards are
leveraged by an unparalleled
lineup of products.
These products are the building
bricks of various solutions for
electric distribution, power
monitoring, motor control and
protection and power factor
correction.
High and medium power busbar trunking
Canalis
Power metering
& monitoring unit
PowerLogic PM…
Air circuit breaker
630 A … 1600 A
Masterpact NT
Molded case circuit breaker
100 A … 3200 A
Compact NS
We are committed to
developing competitive,
compatible products that
are easy to install & operate.
Our products and systems
optimize electrical installations,
make them safer and more
flexible, while complying with
prevailing standards.
8
Air circuit breaker
800 A … 3200 A
Masterpact NW
Molded case circuit breaker
100 A … 400 A
EasyPact
DIN rail products
Miniature circuit breakers, residual current devices, earth leakage protection, etc.
multi9
Thermal magnetic circuit breaker
GV2-ME, GV2-P
Monitoring relays
Zelio Control RM‥
Low voltage capacitor banks
Varplus 2
LV power factor controllers
Varlogic
General technical information
Connection by cables
Practical rules:
Schneider Electric recommends cabling according to the circuit breaker
rating.
The following tables take into account the installation conditions related to
the type of device (permissible temperatures near the connection terminals,
etc.). They ensure consistency with the temperature derating values of the
installed devices.
Connection of circuit-breaker by cables
■ copper cables.
Device
Section (mm2)
NS100
25
NS160
50
NS250
NS400/NS630
95
Permissible current with cables secured individually
Current (A)
IP  31
14
25
29
39
55
77
100
Cable
Section (mm2) 1.5 2.5 4
6
10
16
25
straps or bars
125
150
190
230
35
50
70
95
Permissible current with cables secured in bundles
Current (A)
IP  31
12
20
24
33
50
Cable
Section (mm2)
1.5
2.5
4
6
10
70
93
120
16
25
35
Connection of other devices by cables
■ copper cables.
Permissible current with cables secured individually
Current (A)
IP  31
12
21
26
35
50
70
90
Cable
Section (mm2) 1.5 2.5 4
6
10
16
25
Permissible current with cables secured in bundles
Current (A)
IP  31
10
19
22
30
46
Cable
Section (mm2)
1.5
2.5
4
6
10
Sizing of protective
conductor PE
115
135
176
210
35
50
70
95
63
84
103
16
25
35
Optimised method:
Use the calculation formula given by standard IEC 60439-1:
SPE =
 I2t
k
■ SPE: cross-sectional area of PE in mm2
■ I2: value of the phase-to-earth fault current = 60% of the value of the
phase-to-phase fault current (standard IEC 60438-1 §8.2.4.2).
■ t: duration of the fault current in seconds
■ k: a factor depending on the conductor material. k = 143 for a PVCinsulated copper PE conductor.
Simplified method (based on the above formula):
■ Use the table below.
■ Depending on the Isc of the device, determine the cross-sectional area of
the PE conductor.
Cross-sectional area
of the PE conductor (mm)
Isc  40 kA
40 < Isc < 50 kA
Isc u 50 kA
Masterpact NWH3 with
a 0.5 sec. time delay
1 bar 25 x 5
1 bar 50 x 5
1 bar 50 x 5
Other Schneider
Electric device
1 bar 25 x 5
1 bar 25 x 5
1 bar 50 x 5
9
General technical information
Degree of protection IP code
Standard IEC 60364-3 lists and codes a large
number of external influences to which an electrical installation may be subjected: presence of
water, presence of solid bodies, risk of impacts,
vibrations, presence of corrosive substances.
These influences are exerted with an intensity
varying according to installation conditions: the
presence of water may be simply a few drops falling…or complete immersion.
Standard IEC 60529 indicates the degrees of
protection provided by an enclosure for electrical
devices against access to hazardous parts,
against penetration of solid foreign objects and
against penetration of water.
1st digit
Protection against ingress of solid objects
1 Protected against
Ø 50 mm
2 Protected against
Ø 12,5 mm
solid foreign objects
larger than 50 mm
solid foreign objects
larger than 12.5 mm
3 Protected against
solid foreign objects
larger than 2.5 mm
4 Protected against
solid foreign objects
larger than 1 mm
These standards do not apply for the protection
against the risks of explosion or conditions such a
humidity, corrosive vapour, fungus or vermin.
The IP code is made up of two digits and
can include an additional letter when the actual
protection against access to the hazardous parts
is better than that indicated by the first digit.
The first digit characterises the protection
provided by the enclosure against the ingress of
solid foreign objects.
The second digit characterises the protection
provided against the ingress of water with harmful
effects.
2nd digit
Protection against ingress of water
1 Protected against
vertically falling water
drops (condensation)
Ø 2,5 mm
Ø 1 mm
2 Protected against
vertically falling water
drops when enclosure
tilted up to 15°
3 Protected against
spraying water up to
60° from vertical
4 Protected against
splashing water from
all directions
5 Protected against dust
5 Protected against
6 Dust tight
6 Protected against
(dust protected)
water jets from all
directions
powerful water jets
from all directions
7 Protected against the
effects of temporary
immersion in water
8 Protected against the
effects of continuous
immersion in water
10
15
60
Schneider Electric
SEE 86048 / E
NE Africa & Egypt Head Office
68, Tayaran st., Nasr City,
Cairo, Egypt.
P.O. Box 2658 El Horreya.
Tel : + 202 24 01 01 19
Fax: + 202 22 61 89 08
http://www.schneider-electric.com.eg
Customer Care Center (CCC)
Hotline: 19775
email: customer.care@eg.schneider-electric.com
Design & production: Communication - SEE
Printing: Trust Advertising co.
As standard specifications
and designs change from
time to time, please ask for
confirmation of the information
given in this publication.