Print Date 12/05/15 Page 13 of 32 S7600-00MA-08
2.2 EXTERNAL CONECTIONS
2.2.1 Mains Supply Connectors
These are two independent 6 Way plugs at the rear of the Supply Disconnector section, CON02 and
CON03. Having two enables use of independent ‘A/B’ power sources with the same or different
phases. Each supply must be single phase, 176V to 264V AC, 47 - 63Hz.
The maximum current drawn from each supply (at 230V AC) is in the order of 2A (for the S76005-02),
4A (for the S76005-01 or S7601) or 8A (for the S7602).
! CAUTION !
The S76005, S7601 and S7602 MUST NOT be operated at voltages significantly below 176V, as
the supply current may exceed the rating of the two 2x16A mains supply connectors and
associated wiring and components.
Fitting of the specified MCB (see next paragraph) will ensure
this cannot occur
! CAUTION !
The mains supply leads (two total except for the 500W single input S76005-01, where only one is
used) to the Transmitter must each consist of three core (P+N+protective earth) insulated cable.
Each
core must be at least 2.5mm
2
and the overall cable armoured (type SY flexible steel armoured cable
preferred)
and not mounted in a conduit with other supply cables
.
Two double pole, 16A (C
rated) MCBs must be provided at the supply distribution board(s) to protect both leads and
Transmitter supply input circuitry.
Also, since the supply input circuitry contains filters, which pass
current to the Transmitter chassis,
the Transmitter chassis must be connected to a safety ground
.
Also ensure whilst making any connections to the mains supply, that the Transmitter’s front
panel Supply Disconnector is switched to ‘off’ (i.e. at O) and is preferably padlocked in that
position to prevent inadvertent operation of the Transmitter.
Each lead terminates in a separate 6 Way 16A/440V free socket at the Transmitter end, which are
wired as follows :-
Pin 1
Line
Pin 2
Neutral
Pin 3
Prot. Earth
Earthing Pin
Prot. Earth
The two leads must go via separate MCBs.
The armouring of the cable should also be taken to ground at the supply distribution board.
The free connectors should be fitted with top entry hoods.
An earthing bolt is provided adjacent to the mains supply input connector to allow the Transmitter
chassis to be permanently bonded to nearby safety ground directly or via rack metalwork.