Parker 590+ series - Front View of Phase Assemblies; Phase Assembly Removal Procedure

Routine Maintenance and Repair 8-15
DC590+ Series DC Digital Drive
Busbar
Phase Assembly
Stack of
interconnecting
plates
2Q
A-
A+
Trigger Board
Thyristor
Suppression
Board
(one only shown
for clarity)
(one only shown
for clarity)
Figure 8-3 Front View of Phase Assemblies
IMPORTANT
When re-assembling the unit, apply a `zinc-loaded’ jointing compound between the fuses and busbars, between the
busbars and phase assemblies and between the interconnection plates and the heatsink (BICC BX1 - Parker SSD Part No.
EA466241)
Observe all tightening torque levels, refer to Appendix E: “Technical Specifications” - Termination Tightening Torque (Frame H).
Phase Assembly Removal Procedure
1. Referring to Figure 8-1 (590+) or Figure 8-2 (591+), remove the M12 screw (A). Undo the four screws (B, C, D, E) which allows the CT plate and
fuse assembly to be removed.
2. Unplug the thyristor gate leads and the heatsink overtemperature leads from the relevant phase assembly trigger board. Remove the same leads
from the adjacent phase assembly or assemblies (this is necessary to gain complete access to the interconnecting plates.) If you are removing the
phase assembly from a 591+ (2Q) product, also disconnect the thyristor suppression lead from the trigger boards.