Operation Manual -
PoWerMaster®
2400 – 30 - 90 kVA
Transport and Installation
Document no. 578.650BB
Page 24 of 91
•
Aircraft Connector temperature supervision
(Optional - see section 11).
The 3 x PTC resistors in series (one for each phase) are supplied with +24 VDC from the Hobart
PoWerMaster®
2400. They return a high signal (+24 VDC) to the input as long as the plug
temperature is below the PTC resistors cut-off value.
•
Neutral Conductor Rupture
(Optional - see section 11).
Feedback wire from the aircraft plug’s 400 Hz Neutral. The input references the 400 Hz neutral
internally.
•
Key reader, bridge, cable drum etc. provides a contact closure to enable the
PoWerMaster®
2400 to operate via GPU enable
(Optional - see section 11)
The input can either be supplied from the Hobart
PoWerMaster®
2400 as shown below or
supplied from an external supply as the input Terminals X1(6&7) are insulated.
Acceptable input range: 24 Volt ± 20%.
•
Indications
Lamps for GPU On, Interlock Present, Aircraft Connector Inserted signal present, GPU Ready
& Common Error
Fig. 4.9.1 Example of wiring for external control via the I/O terminal
From the factory, the jumper SW3 is set to position –IO which connects the internal minus to the
common reference. If the +24 is wanted as reference, the jumper is moved to +IO.
Note!
The terminal block X2 is only installed if the additional output contactor option has been ordered.
Terminal block X2 is identical to terminal block X1, except for the GPU enable signal, which is not
present at X2. All other connections can be made as shown above.
For Dry Contact relays please refer to
(Optional - see section 11)
Contacts V
max
= 50 V AC/DC and I
max
= 2 A