3
1.2
Electrical Connections
1.2.1 Changing Transformer Taps
The ESCR125 accepts standard input voltages of 120, 208, or 240 VAC by changing the connections to the input
terminals. Before changing the AC input taps, assure that AC supply and DC loads to the ESCR125 are turned
off and locked out. Verify that no voltage is present by using a voltmeter at all input and output terminals.
Turning off the AC and DC circuit breakers on the ESCR125 does NOT
eliminate live voltages inside the
enclosure. Additionally, de-energize any external wiring to the alarm relay contacts. Change the connections to
the input terminals as shown in the table and figure below.
Note:
Input mains voltage must also be changed in the configuration menu.
Changing Transformer Taps Procedure
Before beginning any work inside the charger enclosure, ensure that all incoming AC supply and DC load wires
are de-energized. Verify that no voltage is present inside the case by using a voltmeter at all input and output
terminals.
For 120 VAC Input Voltage:
1.
Connect wire marked
A
to terminal
TB3-8
2.
Connect wire marked
B
to terminal
TB3-10
3.
Connect wire marked
C
to terminal
TB3-6
4.
Connect wire marked
D
to terminal
TB3-10
AC input 1
connects to terminal
TB1-1 (Line)
AC input 2
connects to terminal
TB1-3 (Neutral)
For 208 VAC Input Voltage:
1.
Connect wire marked
A
to terminal
TB3-9
2.
Connect wire marked
B
to terminal
TB3-8
3.
Connect wire marked
C
to terminal
TB3-5
4.
Connect wire marked
D
to terminal
TB3-9
AC input 1
connects to terminal
TB1-1 (Line 1)
AC input 2
connects to terminal
TB1-2 (Line 2)
For 240 VAC Input Voltage:
1.
Connect wire marked
A
to terminal
TB3-10
2.
Connect wire marked
B
to terminal
TB3-8
3.
Connect wire marked
C
to terminal
TB3-5
4.
Connect wire marked
D
to terminal
TB3-10
AC input 1
connects to terminal
TB1-1 (Line 1)
AC input 2
connects to terminal
TB1-2 (Line 2)
Table 3 –
Input Terminal Connections
Figure 5 –
Input Terminals
Connection Schematic