6AC power system description
Table 2
Transient tolerance
Transient tolerance Amplitude Duration
(See note)
Surges 288
U ac
8.34
mS
to
50 ms
276 U ac 50 mS to 500 ms
Sags
146Uac 8.34
mS
to 50 ms
166Uac 50
mS
to 500 ms
Spikes 815 Upk ~4.17 ms
815 U pk to
‘408
U pk 4.17 to 8.3 ms
Notches
to ou
~4.17
mS
OUto206U
4.17
mS
to 8.3 ms
Note: All transients are applied at the peak of the AC waveform.
.
Internal power distribution
Figure 3 shows the internal AC power distribution elements:
-
Pedestal Power Distribution Unit (PDU)
-
Module to Module Harness
-
Module Power Distribution Unit (MPDU)
-
Module to Backplane Harness
-
AC Power Supplies
The power cables enter the Pedestal and connect to the Field Wiring Terminal
Block which is located in the Power Distribution Unit (PDU). From that
terminal block, the AC voltage passes into the Power Distribution Unit (PDU)
which has a single circuit breaker providing power to each of the four modules
and the cooling fans. The System monitor runs off a small AC Power Supply
which operates independent of the circuit breaker. Module to Module
distribution produces individual AC power to each module.
Power engineering 553-3001-152