Guardian 4389 Diagnostic Repair Manual page 47

SECTION 3.1
DESCRIPTION & COMPONENTS
GENERAL
The prepackaged, V-Type transfer switch is rated
100 amps at 250 volts maximum. It is available in 2-
pole configuration only and, for that reason, is
useable with 1-phase systems only.
Prepackaged transfer switches do not have an
intelligence system of their own. Instead, automatic
operation of these transfer switches is controlled by a
circuit board housed in the generator control panel.
ITEM DESCRIPTION
1 BOX GTS LOAD CENTER
2 COVER, 12 POSITION GTS LOAD CENTER
3 TRANSFER SWITCH HOME STANDBY 100A2P250V
4 SCREW TAPTITE M5-0.8 X 10 BP
5 SCREW TAPTITE 1/4-20 X 5/8 BP
6 LOCK WASHER, SPECIAL-1/4"
7 RELAY PANEL 12VDC DPDT 10A@240VA
8 BASE, MOUNTING 12 CIRCUIT 125A/240V
9 SCREW TAPTITE M4-0.7X10 BP
10 RIVET POP .156 X .160-.164/#20
11 WASHER FLAT 1/4 ZINC
12 PLUG
13 HARNESS ADAPTER PLATE
14 PANEL-SUB BREAKER BASE
15 TRIM VINYL BLACK 1/8GP
16 WASHER LOCK #10
17 NUT WING M6-1.0
18 HANDLE, TRANSFER SWITCH HOME STANDBY
19 HOLDER CABLE TIE
21 LUG DIS QK NI-S 10X45 DEG BR/T
22 SCREW PPHM #10-32 X 1/4
23 LUG SLDLSS 1/0-#14X9/16 AL/CU
24 BLOCK TERMINAL 20A 5 X 6 X 1100V
25 TIE WRAP 3.9" X .10" NAT'L UL
26 WASHER FLAT #8 ZINC
27 COVER, RELAY & TERM BLOCK
28 WIRE HARNESS,GTS LOAD CENTER (NOT SHOWN FOR CLARITY)
29 FUSE HOLDER
30 ASSEMBLY FUSE 5A X BUSS HLDR73591
31 PCB SUPPORT SNAP-IN 1-3/8"
32 CIRCT BRK 20 X 1 HOM120
33 CIRCT BRK 20 X 2 HOM220
34 CIRCT BRK 15 X 1 HOM115
35 CIRCT BRK 30 X 2 HOM230
36 COVER - HARNESS ENTRY
37 HARNESS, GTS TO EXT CONN BOX
38 WASHER LOCK M4
39 SCREW SW 1/4-20X5/8 N WA JS500
40 SCREW SWAGE 1/4-20 X 1/2 ZINC
41 SCREW PPHM M4-0.7 X 10
42 HARNESS,GTS TO MAIN PANEL
Page 3.1-1
Figure 1. Exploded View of V-Type Prepackaged Transfer Switch
PART 3
ENCLOSURE
The standard prepackaged, V-Type transfer switch
enclosure is a NEMA 1 type ("NEMA" stands for
"National Electrical Manufacturer's Association").
Based on NEMA Standard 250, the NEMA 1
enclosure may be defined as one that is intended for
indoor use primarily to provide a degree of protection
against contact with the enclosed equipment and
where unusual service conditions do not exist.
V-TYPE PREPACKAGED
TRANSFER SWITCHES