Xantrex XKW 12-150, Operating Manual

Page: 65 / 90

Operation
Using Over Voltage Protection (OVP)
Revision A
63
Programming
OVP with an
External
Voltage
Source
To set the OVP trip level with a 0-5Vdc or a 0-10Vdc external voltage source:
1. Ensure the power supply is turned OFF and that both the AC power source and
the load are disconnected. Allow five (5) minutes to elapse to dissipate stored
energy before resetting switches or making connections. Refer to
“Configuring
for Remote Programming, Sensing, and Monitoring” on page 48 for instructions
for removing the cover and resetting switches or making J3 connections.
2. Set the power supply's internal switch SW1-7 OPEN. Ensure switch SW1-6 is
set to OPEN for 0-5Vdc OVP programming (factory default setting) or set it to
CLOSED for 0-10Vdc OVP programming. See
Figure 3.13 and Figure 3.14 .
3. Connect the external voltage source between pin 3 (positive) and pin 12 (return)
on the J3 connector on the rear panel. See Figure 3.13 and Figure 3.14 . The use
of shielded-twisted pair wiring is recommended. Ground the shield to J3
connector pin 6 or to the chassis using one of the J3 connector screws.
4. Set the external programming source voltage to maximum (5 Vdc or 10 Vdc).
5. Turn the power supply ON and turn the front panel voltage control clockwise
until the voltmeter shows the desired trip voltage.
6. Slowly reduce the external programming voltage until the red OVP LED lights
and the power supply shuts down.
Note: When OVP is programmed by an external voltage source, the OVP set point
can be approximated using the following formula:
OVP Set Point + 2% = (V
O
/ PGM
SCALE
)V
PGM
where: V
O
is the power supply model-rated voltage
PGM
SCALE
is the external voltage source maximum voltage (5 or 10)
V
PGM
is the remote OVP program voltage setting (0 to 5Vdc or 0 to 10Vdc)
.
Figure 3.13
Remote Programming of OVP
(with a 0-5Vdc External Voltage Source)
J3
+
0 - 5 V
8 7 6 5 4 3 2 1
TM-25OP-01XN.book Page 63 Monday, April 5, 2004 8:58 AM