Transfer Switch Options - Generac Power Systems GTS "W" Owner's Manual

3.15 TRANSFER SWITCH OPTIONS

The transfer switch may be equipped with one or more
of the following options:
• Instrument Package, 3.15.1
• Signal Before Transfer, 3.15.2
• Remote Auto Control, 3.15.3
• Manual bypass for return to Normal, 3.15.4
• Preferred Source Selector, 3.15.5
• Manual 3-Position Selector Switch (Normal-Auto-
Standby) 3.15.6
• NEMA 3R, 4, 4X or 12 enclosure, 3.15.7 through
3.15.10
3.15.1 INSTRUMENT PACKAGE
The optional instrument package includes (a) an AC
voltmeter, (b) an AC ammeter, (c) an AC frequency
meter, (d) an hourmeter, and (e) a phase selector switch
(Figure 3.7). Several current transformers are required
to operate the instrument package, i.e., two for single
phase systems, three for 3-phase systems. Use the
phase selector switch to select the 1-phase voltage and
current being read as follows:
SWITCH OPERATION CURRENT READING
1
2
3
OFF
For 3-phase systems use the switch as follows:
SWITCH OPERATION CURRENT READING
1
2
3
OFF
Figure 3.7 — Instrument Package
QUARTZ
2 2 0 0 2 6 6
TOTAL HOURS
PHASE SELECTION
AMP/VOLT
OFF
3
1
VOLTAGE READING
Line 1 Line 1 to Neutral
Line 2 Line 2 to Neutral
No reading Line 1 to Line 2
No reading No reading
VOLTAGE READING
Phase A Phase A to Phase B
Phase B Phase B to Phase C
Phase C Phase C to Phase A
No reading No reading
V
600
400
200
0
Hz
65
60
55
A
600
400
200
0
Section 3 — Operation
Generac GTS "W" Type Transfer Switch
3.15.2 SIGNAL BEFORE TRANSFER
The signal before transfer option includes a signal relay,
customer connection terminal strip and the associated
wiring. See Figure 3.8.
The logic for this option is a part of the GTS Controller
PCB. The option is active when the Signal Before
Transfer switch is ON. The delay time is adjustable
from 1 to 30 seconds.
The basic operation of the option is to delay (for the
period of time set on timer) the transfer of the GTS
mechanism while a signal relay (SR) is energized. When
the relay is energized, 2 sets of the dry contacts (wire
nos. 236-240 and 237-238) are closed. These dry con-
tacts can be connected to, via a terminal strip located on
the bottom of the subplate. Reference wiring diagram
No. 0D8035 (page 33) for further details. The customer
connections are made on terminal strip TS4.
Figure 3.8 — Signal Before Transfer
This delay is not active on a Normal source failure.
Transfer during Normal source failure is immediate.
3.15.3 REMOTE AUTO CONTROL
The Remote Auto Control option includes a customer
connection terminal strip and the associated wiring
(Figure 3.9 on page 14).
This option allows for remote starting of the generator
and transfer of the GTS to connect the LOAD to the
EMERGENCY source. This is done by paralleling the
Fast Test switch. A description of the Fast Test Mode
function can be found in Section 3.10.3 on page 10.
Reference wiring diagram No. 0D8035 (page 33) for fur-
ther details. The customer connections are made on
TS3. The associated wire numbers are 0, 177, 178 and
201.
Generac
NOTE:
® Power Systems, Inc. 13