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XT-40 & IT-RSS Installation IM01005012E
Rev. 1 – 2/2007 Page 1
1 INTRODUCTION
1.1 Scope
This installation manual contains the information necessary to install Eaton Corporation’s XT-40 and
IT-RSS Surge Protective Devices (SPDs). System wiring and voltage information for these devices are
provided in Sections 1.2 and 1.3.
If you require further information regarding a particular installation, contact Power Quality Technical
Support at 1-800-809-2772.
1.2 XT-40 Catalog Numbering System
X
T
-40
-
3
Y
10
1
Model / Surge Current
Configuration & Voltage Ranges (Vac)
1S101 =Split-Phase — 100/200, 110/220, 120/240
3Y101 = Three-Phase Wye (Star) — 100/174, 110/190, 120/208, 127/220
1P101 =Single-Phase — 100, 110, 120, 127
XT / 40 kA
1P201 = Single-Phase — 200, 208, 220, 230, 240, 277
1P400 =Single-Phase — 380, 400, 415, 440, 480
3Y201 = Three-Phase Wye (Star) — 220/380, 230/400, 240/415, 277/480
3Y300 =Three-Phase Wye (Star) — 305/525, 347/600
3D101 = Three-Phase High Leg Delta — 120/240
NN201 = Three-Phase Delta — 200, 208, 220, 230, 240
NN400 = Three-Phase Delta — 380, 400, 415, 440, 480
NN501 = Three-Phase Delta — 525, 600
In this example, Catalog Number XT-40-3Y101 identifies
an XT model with the following features and ratings:
• Surge Current Rating of 40 kA
• Three-Phase WYE Configuration
• Voltage Range of 100 to 220 Vac
1.3 IT-RSS System Wiring and Maximum Voltages
Model
Number
System
Wiring
Phase to
Phase
Line to
Ground
IT-RSS Split Phase 288 Vac 144 Vac