Liebert II User Manual
Page 9
Electrical Connections 5
Disconnect Switch—TVSS units must be connected to the load side of the main service discon-
nect, or load side of a protected circuit’s disconnecting means.
Interceptor II “SI” Models with an “R” designator in the part number, are equipped with an inter-
nal disconnect switch, that can be used to de-energize the unit’s transient surge suppressing com-
ponents for servicing.
Table 3
Voltage ratings and power source configurations
Source Configurations
Nominal Operating Voltage
Model Voltage
L-N
L-L
L-G
Code
Single Phase L-N 2W+G
120
N/A
120
120N
230
N/A
230
230N
277
N/A
277
277N
Single Phase L-L 2W+G
N/A
208
208
208L
N/A
240
240
240L
N/A
480
480
480L
Split Phase 3W+G
120
208-240
120
120S
230
400-460
230
230S
277
480-554
277
277S
Three Phase Delta 3W+G
N/A
208
208
208D
N/A
240
240
240D
N/A
480
480
480D
Three Phase Delta Hi-Leg 4 W+G
120
240
120
240H
240
480
240
480H
Three Phase Wye 4W+G
120
208
120
120Y
230
400
230
230Y
277
480
277
277Y
For other voltages or source configurations, consult factory.
L
N
G
L
N
G