General Information; Introduction; Unpacking; Equipment Description - Generac RTSR400A3 El Manual Del Propietario

General Information

• Never work on this equipment while physically or mentally
fatigued.
• Keep the transfer switch enclosure door closed and bolted at all
times. Only qualified personnel should be permitted access to
the switch interior.
• In case of an accident caused by electric shock, immediately
shut down the source of electrical power. If this is not possible,
attempt to free the victim from the live conductor but AVOID
DIRECT CONTACT WITH THE VICTIM. Use a nonconducting
implement, such as a dry rope or board, to free the victim from
the live conductor. If the victim is unconscious, apply first aid
and get immediate medical help.
• When an automatic transfer switch is installed for a standby
generator set, the generator engine may crank and start at
any time without warning. To avoid possible injury that might
be caused by such sudden start-ups, the system's automatic
start circuit must be disabled before working on or around the
generator or transfer switch. Then place a "DO NOT OPERATE"
tag on the transfer switch and on the generator. Remove the
Negative (Neg) or (–) battery cable.

1.1 INTRODUCTION

This manual has been prepared especially for the purpose of famil-
iarizing personnel with the design, application, installation, opera-
tion 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 application, or improper procedures.
Every effort has been expended to make sure that the contents
of this manual are both accurate and current. The manufacturer,
however, reserves the right to change, alter or otherwise improve
the product at any time without prior notice.

1.2 UNPACKING

Carefully unpack the transfer switch. Inspect closely for any dam-
age that might have occurred during shipment. The purchaser must
file with the carrier any claims for loss or damage incurred while in
transit.
Check that all packing material is completely removed from the
switch prior to installation.

1.3 EQUIPMENT DESCRIPTION

The automatic transfer switch is used for transferring critical
electrical loads from a UTILITY (NORMAL) power source to a
GENERATOR (STANDBY) power source.
The transfer switch prevents electrical feedback between the
UTILITY and GENERATOR sources. For that reason, electrical
codes require a transfer switch in all standby electric system
installations.
When the transfer switch is connected to the engine generator
control panel, the control panel constantly monitors the UTILITY
voltage and controls the operation of the transfer switch.
This switch is suitable for control of motors, electric discharge
lamps, tungsten filament and electric heating equipment and the
tungsten load does not exceed 30% of the switch rating.
2
This UL listed transfer switch is for use in optional standby sys-
tems only (NEC article 702).
The Overload Prevention Control Board is designed to prevent an
overload on the generator when it is supplying the customer loads.
See figure 1.1. Up to six loads can be managed by the OPCB; 2
air conditioner loads and 4 other loads. The OPCB manages the
loads by "shedding" the connected loads in the event of a drop in
generator frequency (overload). Loads to be "shed" are grouped in
4 priority levels on the OPCB.
• Priority 1 and 2 has connections for both one air conditioner
and one contactor. Both an air conditioner and a contactor
can be used at the same time if desired. To control an air
conditioner, no additional equipment is required. Internal relays
interrupt the thermostat 24VAC control signal to disable the air
conditioner load.
• Priority 3 and 4 have connections for one contactor only.
• Four LEDs, located on the Overload Prevention Control Board,
will indicate when a load priority level is enabled. When loads
are connected, the LEDs will be illuminated.
• Any loads, including central air conditioners, can be controlled
via a contactor that must be purchased separately. Up to four
contactors can be controlled by the Overload Prevention Control
Board. (The 24 VAC or 120 VAC is supplied through the OPCB
to energize each contactor coil).
• Generator overload condition is determined by generator fre-
quency. Loads are shed when the frequency is <58Hz for 3
seconds or <50Hz for ½ Second (for 60Hz).
The OPCB has a Test button which forces the unit to act as if an
overload has occurred. This button operates even when the trans-
fer signal is inactive.
Figure 1.1 — Overload Prevention Control Board
Air Conditioner Connections:
Up to two A/Cs can be
controlled here via their low
voltage thermostat wires
Status LEDs: Shows which
loads are currently allowed to
run
LOAD
1
0 Ground
SUPPLY
194 +12V T1
NEUTRAL
23 Transfer
LOAD
2
A/C 1 SUPPLY
1
24V
LOAD 1
2
A/C 2 1A MAX
1 1 1
24V
LOAD 2
2 2 2 2
1A MAX
A/C 1 & LOAD 1
1 1 1 1
LOAD 3
A/C 2 & LOAD 2
2 2 2 2
1A MAX
LOAD 3 1
4
LOAD
2
LOAD 4
1A MAX
Load Connections: Up to four
loads of any type can be
controlled via these
connections. A separate
contactor module is required