Vertiv™ | Liebert
®
STS2
™
100-1000A, 50/60Hz User Manual | Rev. 12 | 11/2017 12
5.3 Control Wiring Connections
No control wiring is needed on the standard Liebert STS2. Only certain options require external control wiring.
See 6.0 - Options on page 13 for details
5.4 Power Supply
The Liebert STS2 is supplied with redundant power supplies that are designed to operate from a voltage range
of 200V to 600V. The unit is set at the factory to match the nameplate voltage. Field adjustments are not
necessary. If the unit needs to operate at a voltage other than what is listed on the nameplate, contact Vertiv
Services or your local Vertiv representative. Table 3 provides transformer tap information.
Table 3 Terminal Block 1 and Terminal Block 2 wire connections
Voltage
Connect Connect
Jumper
Between
F1
TB1-XX
F2
TB1-YY
F3
TB2-XX
F4
TB2-YY
200 1 9 1 9 1-7
208 1 10 1 10 1-7
220 2122126-8
240 1111111-7
380 1 8 1 8 2-7
400 1 9 1 9 3-7
415 1 10 1 10 4-7
480 1 11 1 11 5-7
600 1 12 1 12 6-7
CAUTION
Using Table 3, ensure that the wiring for the control transformers matches the input voltage for the unit.
Improper wiring could result in blown fuses.
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