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5 - Clearance and creepage distances
The minimum clearance in air depends on the rated impulse withstand voltage and
the degree of pollution in the switchboard.
The minimum creepage distance depends on the rated insulation voltage, the
degree of pollution and the material group of the insulating material separating the
live parts.
The tests carried out on typical Prisma Plus configurations, equipped with standard
main busbars, confirm compliance with minimum clearances and creepage
distances for a voltage of 1000V, degree of pollution 3 and material group IIIa:
minimum clearance: 14 mm
minimum creepage distance: 16 mm.
6 - Mechanical operation
The mechanical operation test is carried out on an assembled switchboard.
The standard requires that 50 operating cycles be carried out.
Verification of locking mechanisms are included in this range of tests.
For Prisma Plus:
After 50 operating cycles, the interlocking mechanisms and other moving parts of
the switchboard conserve their initial properties
Certain more solicited moving parts (door handles, hinges, etc.) have have been
subjected to 10000 operating cycles with success.
7 - Degree of protection
The tests carried out define the capacity of an equipped switchboard to :
protect persons against contact with live parts
protect equipment against penetration of solid objects and liquids.
Results of tests confirm the characteristics of Prisma Plus switchboards: IP30 to
IP55 and IK7 to IK10 depending on the configuration.
b
b
b
b
b
b
PD390933
Degree of protection.
3 routine tests
The 3 routine tests must be carried out by the pane builder. They are fast and easy:
inspection of the assembly according to the mounting instructions and technical
documents (right device ratings, tightening torques, etc.)
insulation checking by a dielectric test
checking of protective measures and of the electrical continuity of the protective
circuit.
They supplement the manufacturer type tests and guarantee the professionalism
and responsibility of the panelbuilder.
Schneider Electric supplies a full range of tools for assistance in carrying out these
tests:
quality inspection guide
installation guide
assembly guides.
8 - Wiring and electrical operation
This test includes:
Checking of conformity with:
drawings, part lists and diagrams
cabling (power and auxiliary connection)
wiring quality (cross-sectional areas of conductors, crimping, etc.)
marking of cables and devices.
Visual inspection of :
degree of protection (presence of canopy, gaskets and front plates and absence of
open cut-outs, holes, etc.) and creepage distances and clearances for connections
and busbars
technical data document : diagrams, characteristics (voltage, current, system
earthing arrangement, Isc, IP, switchboard dimensions and weights, etc.), name of
the manufacturer, project number, etc.
Mechanical and/or electrical functioning test :
check of wiring and most sensitive parts of the switchboard (mechanical control
components, mechanical and electrical interlocks, relays, measurement and
monitoring systems, etc.)
The design of Prisma Plus switchboards, based on functional units, ensures
conformity to this test.
b
b
b
b
b
b
b
v
v
v
v
b
v
v
b
v
Prisma Plus
tested switchboards
Standards and
Prisma Plus tested
switchboards