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Once the transfer switch equipment has been installed
and wired, perform initial mechanical and electrical pro-
cedures as outlined in Section 6 to verify that the equip-
ment is installed and operating properly.
NOTICE
Remember to reattach the solid steel power panel
shield to the ratchet assembly after completing any
of the procedures described in this section.
4.7 ENGINE START CONNECTION
The engine control contact connections are located on
the logic panel of the ATS. Connect the engine start
wires to the colored terminal blocks marked 1 and 2. A
contact closes between these terminal blocks when an
engine start signal is provided by the ATS logic. The
wiring diagram provides additional engine start
connection information.
NOTICE
Prior to making the engine start connection to the
switch, set the engine generator controls selector
switch in the OFF position to prevent an unwanted
engine start.
4.8 ADDITIONAL IMPORTANT INSTALLATION
INSTRUCTIONS
!
IT IS IMPORTANT, AS APPLICABLE, TO BE AWARE
OF AND FOLLOW THE ADDITIONAL INSTRUCTIONS
PRESENTED HERE WHEN INSTALLING THE EQUIP-
MENT. FAILURE TO DO SO COULD RESULT IN
EQUIPMENT DAMAGE AND/OR IMPROPER OPERA-
TION.
Importance of Proper Bonding and Grounding of the
Neutral
Your Cutler-Hammer AGswitch uses the neutral as a
reference for deriving control power to operate the
transfer switch. Failure to connect the Transfer Switch
Neutral in the power system properly can result in
equipment damage, or damage and improper operation
of the transfer switch.
CAUTION
Proper grounding and bonding of the neutral is covered
in Article 250 of NFPA 70. Generally this will involve the
following if the Transfer Switch is applied as Service
Equipment:
1. The Neutral MUST be grounded to a system
ground, which may be an 8 foot long ground rod dri-
ven in the ground near the transfer switch. Other
grounding means may be acceptable/necessary.
2. The neutral must be bonded (using the supplied
bonding jumper) to the Transfer Switch enclosure.
A Green grounding stud is supplied at the bottom of the
enclosure. The stud can be used to bond the enclosure
to a system ground or other grounding means.
Option 32 TDNC (Time Delay Neutral)
In agricultural facilities where the typical load consists of
fans, well pumps, fluorescent lighting and feeding equip-
ment, it is EXTREMELY important that Option 32 (Time
Delay Neutral) is properly applied.
Motors disconnected from a source, become generators
of electricity. If a new source of power is immediately
connected, and this new source is "out-of-phase" with
the voltage being generated by the motors, then inrush
currents will be MUCH higher than normal starting cur-
rents for those motors.
It is important that the TDNC timer (which is stan-
dard on the Cutler-Hammer AGswitch) be set for a 5
to 10 second delay. This allows the EMF created when
motors are disconnected from their source to decay
BEFORE connecting another source. This helps prevent
several potential problems from occurring: (1) Excessive
inrush currents caused by an out-of-phase connection.
(2) Excessive starting loads on the generator, which
causes the system voltage to "sag". (3) High switching
transients, and imbalanced currents on the system.
Failure to use this timer feature can result in damage to
equipment, or unnecessary tripping of circuit protective
devices.
I.B. ATS-AG03
Effective 7/00
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