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SECTIoN 3
WarNINg
ElECTrIC SHoCK CaN KIll! Pre-
cautionary measures should be
taken to provide maximum pro-
tection against electrical shock.
Be sure that all power is off by
opening the line (wall) discon-
nect switch and by unplugging
the power cord to the unit when
primary electrical connections
are made to the power supply.
figure 3.5.a
TB5
BLU
WHT
3.8
CoNNECTINg ESP-50 for 400/460 VaC INPuT
The ESP-50 power source with 400/460 vac, -phase input capability is factory set
for 460 vac input. If using 400 vac input, the ESP-50 must be reconnected as follows
before connecting to your input power:
1.
Remove cover from the ESP-50 power source.
.
Locate the Input Bridge (IBR) and TB5 terminal block (see Figure .5.A) on the
left side towards the rear panel. Disconnect the gray lead from TB5- and then
connect it to TB5-1.
.
Locate the output bridge (D1) on left side towards the front panel (see Figure
.5.B). Disconnect and swap leads X and X from the main transformer. For
400 vac input, X is connected to TB and X is connected to terminal of D1.
Make sure the connections are firmly tightened.
4.
Leave all other wires the same.
5.
Reinstall cover and connect the ESP-50 to 400 vac input power.
GRY
400
460
(IBR)
VAC
VAC
INPUT
BRIDGE
R
R
S G
+
T
figure 3-5. original factory Setup for 460 Vac Input on
Power Source with 400/460 Vac Input Power Capability
OUTPUT BRIDGE
(D1)
8
INSTallaTIoN
FROM MAIN TRANS-
figure 3.5.B
FORMER
X1
~
1
+
T1-X
~
2
TB
~
3
T1-X
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