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B-47
Distribution
General
Downstream circuits are connected from the front, without screws, to spring
terminals. Contact pressure automatically adapts to the size of the conductor
(minimum size = 1 mm
2
). Contacts are insensitive to vibrations and thermal
variations.
Only one cable (flexible or rigid, without a metal ferrule) can be inserted in a spring
terminal.
Degree of protection: IPxxB.
Advantages of spring terminals
a reliable electrical connection, no maintenance required
the fast connections make phase balancing very easy.
rewiring is very easy if the switchboard is expanded or modified.
b
b
b
DD381399
250 A Polybloc distribution block
Applications
The Polybloc distr bution block is designed for installation directly downstream of
Compact circuit breakers and Interpact switch-disconnectors devices up to 250 A.
It can be rapidly mounted in the horizontal position. Electrical connections are made
directly to the device terminals.
It has the same width as the devices and does not take up any additional space in
the switchboard.
The connection terminals are slanted to facilitate cable entry and not exceed the
bending radius of the flex ble and rigid cables.
Cat. no. selection
PD390549
Designation
Cat. no.
Polybloc distribu ion block, 3P, 250 A
04033
Polybloc distribu ion block, 4P, 250 A
04034
Electrical characteristics
The electrical characteristics are perfectly compatible with the connected devices.
Neither the temperature derating curves nor the performance levels of the circuit
breakers and switch-disconnectors are altered.
rated insulation level Ui = 750 V
short-circuit withstand current: the reinforced breaking capacity due to cascading
in circuit-breaker combinations is maintained. The worst-case situations have been
tested.
impulse withstand voltage Uimp = 8 kV.
Supply
Directly to the terminals of the Compact NSX and Interpact INS devices up to 250 A.
Distribution
Via cables, up to six 10 mm² cables and three 16 mm² cables per phase.
Installation
Directly on the mounting plates of horizontally mounted Compact NSX100/250 and
Interpact INS250 devices in the enclosures.
It can also be mounted downstream of vertically mounted Compact NSX100/250 and
Interpact INS250 devices in the enclosures. In this case, the Polybloc is mounted on
a depth-adjustable modular rail
(03402).
Dimensions
b
b
DD381402
Vertically mounted Polybloc on a depth-adjustable modular rail
(03402) in a cubicle.
H (mm)
L (mm)
P (mm)
Polybloc, 3P
105
138
63
Polybloc, 4P
140
138
63
DD381406
Polybloc distribution block
Secondary distribution