Connecting Esp-50 For 400(460)Vac Input - ESAB ESP-50 Instruction Manual

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 (380-400)/460 vac, 3-phase input capability is fac-
tory 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.
2. Locate the Input Bridge (IBR) and TB5 terminal block (see Figure 3.5.A) on the
left side towards the rear panel. Disconnect the gray lead from TB5-2 and then
connect it to TB5-1.
3. Locate the output bridge (D1) on left side towards the front panel (see Figure
3.5.B). Disconnect and swap leads X2 and X3 from the main transformer. For
400 vac input, X2 is connected to TB3 and X3 is connected to terminal 3 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
R2
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)
90
INSTallaTIoN
FROM MAIN TRANS-
figure 3.5.B
FORMER
X1
~
1
+
T1-X3
~
2
TB3
~
3
T1-X2