Kohler Generator Sets 20--2800 kW - Manual (Page 50)

TP-5700 7/93 38 Section 7 Electrical Requirements
7.5 Automatic Transfer Switches
A typical standby system has at least one automatic
transfer switch connected to the generator set output to
automatically transfer the electrical load to the
generator set if the normal source fails. When normal
power returns, the switch transfers the load back to the
normal power source and then signals the generator set
to stop.
The transfer switch uses a set of contacts to signal the
engine/generator to start. These contacts are terminals 3
and 4 on the generator set controller terminal strip or
controller connection terminal strip (if used) inside the
junction box. When the normal source fails and the
generator set master switch is in the AUTO position, the
transfer switch contacts close to start the generator set.
The location of the transfer switch contacts is usually
near the contactor with an engine start decal to identify
the correct terminals. The terminals are identified as 3
and 4 (or 57 and 58). Do not connect to terminals 57 and
58 on the inner panel circuit board. Connection must be
at the contactor location. Verify the correct engine start
terminals using the transfer switch wiring diagrams
before making connections.
7.6 Control Connections
Most standby generators can be equipped with a myriad
of optional equipment that will have to be connected to
other components in the system. These accessories will
enable the generator set to meet standards for local and
national codes, or specific requirements of the
customer’s installation. A few of the more common
accessories and their functions are listed on the
following pages.
7.7 Remote Annunciator
The remote annunciator allows monitoring of the
standby power system from a location remote from the
generator
set. Individual lamps identifying fault
shutdowns and/or prealarms are located on the remote
annunciator, along with an alarm horn and silence
switch. There are both surface- and flush-mount models
available. The remote annunciator is typically located in
an area that is monitored on a full-time basis. This allows
the operator to be aware of any alarm conditions when
they occur without having to be physically present at the
generator set. See Figure 7-6.
Remote Annunciator
14-Relay Dry Contact Box
A-293983
A-258782
P FBA--1
42B
10 AMP
NO C C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14
INPUT CONTACT RATINGS: 10A @120VAC RES. LOAD .01A @28VDC MIN. 10A @28VDC MAX.
PCB ASSY A--320639 LOT NO.
42A 2 K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K13 K14 K12
P
N
Figure 7-6 Remote Annunciator with 14-Relay Dry
Contact Kit
7.8 Audiovisual Alarm
The audiovisual alarm warns the operator of a fault
shutdown or prealarm condition at a remote location.
See Figure 7-7.
Front View Side View
A-292887
Figure 7-7 Audiovisual Alarm