Johnson Controls York AYK550, Руководство пользователя

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#8?8
YORK, A Johnson Controls Company
constructed PE conductor is always recommended. The following figure shows the
minimum requirement for the motor cable screen (for example, MCMK, NK Cables).
* Input filters designed for AYK550 cannot be used in an isolated, or high impedance earthed
industrial distribution network.
'8**& %&8 !
The following figure compares conductor layout features in motor cables.
98 %" 8
The general rule for cable screen effectiveness is: the better and tighter the cable’s
screen, the lower the radiated emission level. The following figure shows an
example of an effective construction (for example Ölflex-Servo-FD 780 CP,
Lappkabel or MCCMK, NK Cables).
Clamp the cable shield into the gland plate at the drive end. Twist the cable screen
wires together into a bundle not longer than five times its width and connect it to the
terminal marked
(at the bottom right-hand corner of the drive).
Insulation Jacket
Copper Wire Screen
Helix of Copper Tape
Cable Core
Inner Insulation
Symmetrical shielded cable: three phase
conductors and a concentric or otherwise
symmetrically constructed PE conductor, and a
shield
!=2@@ 33
(CE & C-Tick)
PE
Conductor
and Shield
A separate PE conductor is required if the
conductivity of the cable shield is < 50% of the
conductivity of the phase conductor.
2,2?342@2,2=;
(CE & C-Tick)
Shield
PE
PE
2?342@2,2=;
with phase
conductor cross section up to 10 mm
2
.
A four-conductor system: three phase
conductors and a protective conductor, without a
shield.
2?3
(CE & C-Tick)
Shield
Shield
Insulation Jacket
Braided Metallic Screen
Inner Insulator
L1
L2
L3