2
Section 1 — General Information
RTSS Type Transfer Switch
1.1 INTRODUCTION
This manual has been prepared especially for the
purpose of familiarizing personnel with the design,
application, installation, operation and servicing of
the applicable equipment. Read the manual carefully
and comply with all instructions. This will help to
prevent accidents or damage to equipment that might
otherwise be caused by carelessness, incorrect appli-
cation, or improper procedures.
Every effort has been expended to make sure that the
contents of this manual are both accurate and cur-
rent. The manufacturer, however, reserves the right
to change, alter or otherwise improve the product at
any time without prior notice.
1.2 EQUIPMENT DESCRIPTION
The PowerManager™ LTS transfer switch will provide
three major functions.
The first function
is to provide an automatic
transfer switch. The automatic transfer switch
is used for transferring electrical loads from a
UTILITY (NORMAL) power source to a GENERATOR
(STANDBY) power source. Such a transfer of electri-
cal loads occurs automatically when (connected to a
Generac engine generator) the UTILITY power source
has failed or is at a substantially reduced voltage and
the GENERATOR source voltage and frequency have
reached an acceptable level. The transfer switch pre-
vents electrical feedback between two different power
sources (such as the UTILITY and GENERATOR
sources) and, for that reason, codes require it in all
standby electrical system installations.
The second function
is to provide a means to divide
up the electrical loads on the electrical system. The
electrical loads are to be divided into “critical loads”
and non-essential loads. The “critical” loads are con-
nected to the internal 16 circuit panel board. The
non-essential electrical loads are to be powered from
the load shed switch (LSS).
The UTILITY source will supply all electrical loads
at all times. When the transfer signal is given by
the engine generator controller, all loads, both criti-
cal and non-essential loads, are connected to the
GENERATOR supply. If the generator is overloaded
the LSS will operate and disconnect the non-essential
loads which results in a reduction in the load on the
generator.
The third function
is a 16 circuit load center to
connect the “critical loads” to. These loads will be
normally powered by the UTILITY source and will be
backed up by the GENERATOR source. The Siemens
load center is provided with the following Siemens
type QP circuit breakers; 1-50A 2-pole, 1-40A 2-pole,
1-20A 2-pole, 5-20A single pole and 5-15A 2-pole
circuit breakers.
The PowerManager LTS transfer switch is suitable
for use as SERVICE ENTRANCE EQUIPMENT –
UTILITY (NORMAL) source only. The PowerManager
LTS is only SERVICE ENTRANCE rated for the USA.
The 200A 2-pole circuit breaker provided is the “ser-
vice disconnect” and is labeled as such. An additional
disconnect must be readily available for the alternate
source, unless the alternate source is an accessible
generator and can be shutdown.
1.2.1 TRANSFER SWITCH MECHANISM
These switches (Figure 1.1) are used with a single-
phase system, when the single-phase NEUTRAL line
is to be connected to a Neutral Lug and is not to be
switched.
Solderless, screw-type terminal lugs are standard.
Switch
Rating
Wire
Range
Conductor Tightening
Torque
200A
#6-250 MCM
275 in-lbs.
This transfer switch is suitable for control of motors,
electric discharge lamps, tungsten filament and elec-
tric heating equipment where the sum of motor full
load ampere ratings and the ampere ratings of other
loads do not exceed the ampere rating of the switch
and the tungsten load does not exceed 30 percent of
the switch rating.
Figure 1.1 — Typical ATS Transfer Mechanism
UTILITY
CLOSING
COIL
GENERATOR
CLOSING
COIL
UTILITY LUGS
GENERATOR
LUGS (E1 & E2)
LOAD LUGS (T1 & T2)
This transfer switch is for use in optional standby
systems only (NEC
®
Article 702).
This transfer switch is suitable for use on a circuit
capable of 22,000 rms symmetrical amperes, 240
VAC maximum.
Summary of Contents for 8kW
Page 1: ...Study Guide S e r v i c e T r a i n i n g Air Cooled Training...
Page 2: ......
Page 36: ...32 32 Section 7 Notes Air cooled Generators...
Page 37: ...33 Section 8 Installation Diagrams Air cooled Generators Circuit Breakers Drawing No 0G8573 A...
Page 38: ...34 Section 8 Installation Diagrams Air cooled Generators Generator Drawing No 0G8280 D...
Page 39: ...35 Section 8 Installation Diagrams Air cooled Generators Generator Drawing No 0G8280 D...
Page 42: ...Part No 0G8334 Revision D 09 16 08 Printed in U S A Catalog No OMASPCA S 01...
Page 58: ...14 Section 5 Electrical Data RTSS Type Transfer Switch Wiring Diagram Drawing No 0G7817 B...
Page 59: ...15 Section 5 Electrical Data RTSS Type Transfer Switch Wiring Diagram Drawing No 0G7817 B...
Page 64: ...20 Section 7 Notes...
Page 65: ...21 Section 7 Notes...
Page 66: ...Part No 0G8637 Revision D 08 27 08 Catalog No KGALT 1SI Printed in U S A...
Page 68: ......
Page 76: ...8 Residential Transfer Switch Installation Guide Installation Drawing 0H0258 A...
Page 77: ...9 Residential Transfer Switch Installation Guide Installation Drawing 0H0258 A...
Page 78: ...Residential Transfer Switch Installation Guide Installation Drawing 0G8573 A 10 10...
Page 79: ...11 Residential Transfer Switch Installation Guide Electrical Schematic Drawing 0G7959 A...
Page 80: ...12 Residential Transfer Switch Installation Guide Wiring Diagram Drawing 0G7958 A...
Page 81: ...13 Residential Transfer Switch Installation Guide Wiring Diagram Drawing 0G7958 A...
Page 82: ...14 Residential Transfer Switch Installation Guide Load Center Exploded View Drawing 0G8786 C...
Page 84: ...16 Residential Transfer Switch Installation Guide Notes...
Page 85: ...17 Residential Transfer Switch Installation Guide Notes...
Page 86: ...Part No 0G8571 Revision D 07 31 08 Catalog No KGATX100 1SI Printed in U S A...
Page 91: ...5 REFERENCE Items supplied in the EZ Transfer operator kit...
Page 92: ...6...
Page 93: ...7...
Page 95: ...Air cooled Generator Battery Charger Installation Guidelines...
Page 113: ...17 Section 6 Notes Battery Charger Installation Guidelines...
Page 114: ...Part No 0G7956 Revision B 11 14 08 Printed in U S A...
Page 115: ......