ABB Relion REX640 User Manual page 32

Section 4
BIO-Tester Relion® REX640
24
GUID-DFAA2EB2-19DF-4832-8C3B-C99C9C402001 V1 EN
Figure 9: Main power switch and main's wall plug connector
3. Select the protection relay's operating voltage depending on the power supply
module used in the relay.
• If PSM1001 module is used, select 48 V DC.
• If PSM1002 or PSM1003 is used, select 110 V DC.
When selecting the operating voltage, it is required to keep the
correct voltage selector button pressed for three seconds before
the operation begins for the selected voltage. If the voltage
selection should be changed after this three-second time delay,
switch the tester off and restart it. This three-second delay in the
selection of the operating voltage avoids accidental choosing of
wrong operating voltage. Wrong selection of operating voltage,
for example, higher operating voltage for the low auxiliary
power supply module causes damage to the power supply
module.
GUID-CB3B6299-1414-4812-91F5-E141731B8E8B V1 EN
Figure 10: Voltage selector for the relay's auxiliary supply voltage
2NGA000105 B
BIO-Tester Relion® REX640
User Manual