Smiths Kelvin Hughes Nucleus 3 5000 Series, System Handbook

Page: 189 / 510

Power Ca bles
40 These ca bles are used for ser vices re quir ing a
mod er ate cur rent car ry ing ca pac ity, i.e. main sup plies.
2-Core (Power):
Cable Code K: KH Reference No. 5344-787
250/440V grade:
7 x 0.67 mm (7 x 0.026") cores
cross linked polythene insulation,
braided with 0.2 mm (0.0078") diameter
tinned copper wire, 79% coverage
low smoke, zero halogen outer sheath.
Outer diameter:
10 mm (0.39 in.).
3-Core (Power):
Cable Code L: KH Reference No. 5344-788
(250/440 V grade):
Specification as for 2-core cable.
Outer Diameter:
10 mm (0.44")
GEN ERAL
41 Be fore start ing elec tri cal con nec tion ob serve the
fol low ing:
42 Iso late power sup plies as fol lows:
(1) Ensure that the associated display is turned off.
(2) Remove fuses from mains isolators.
(3) On Turning Mechanism set ON/OFF switch to
OFF.
43
The cas ing of the upmast turn ing mech a nism must be
se curely earthed to the plat form with braided cop per
wire.
44
The cas ing of the downmast trans ceiver must be
se curely earthed to the deck or bulk head with braided
cop per wire.
45
Al low suf fi cient length on all ca bles to al low for rout ing
through the trans
ceiver. Make sure that there is
suf fi cient slack to al low for ex treme move ments dur ing
sud den shock to the ves sel.
46 En sure that all ca bles are se cured to their as so ci ated
en try point and that screened ca bles are earthed to
their re spected units.
47 Fit cable through gland in ac cor dance with the di a gram
shown on Fig ure 6d.
COVER RE MOVAL
48 Be fore any elec tri cal con nec tions can be made, cov ers
have to be re moved from the fol low ing equip ment:
(1) Upmast Turning Mechanism.
(2) Downmast Transceiver.
(3) Soft Start Unit.
(4) Optional Mains Isolator.
Upmast Turn ing Mech a nism
49 Using a 12 mm spanner, release the six bolts securing
the rear cover to the Upmast Turning Mechanism and
remove the cover.
Downmast Trans ceiver
50
Re lease the six cap tive screws se cur ing the cover to
the Downmast Trans ceiver and re move the cover.
Soft Start Unit
51 Remove the soft start unit cover by releasing the six
captive screws.
Op tional Mains Iso la tor
52 Open the mains iso la tor cover by re leas ing the cap tive
screw.
PCB LO CA TIONS AND CABLEFORM
ROUTING
53 Lo ca tion of PCBs and cableform rout ing in the
trans ceiver are shown on Fig ure 8d.
Original 4d.13 May 01
KH 2020
Chap 4d
WARNING
EN SURE THAT ALL POWER SUP PLIES ARE
ISO LATED BE FORE ANY ELEC TRI CAL
CON NEC TION TAKES PLACE