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Operation
3.1 FUNCTIONAL TESTS AND
ADJUSTMENTS
Following transfer switch installation and interconnection, inspect
the entire installation carefully. A competent, qualified electrician
should inspect it. The installation should comply strictly with all
applicable codes, standards, and regulations. When absolutely
certain the installation is proper and correct, complete a functional
test of the system. Perform functional tests in the exact order
presented in this manual, or damage to the switch could result.
IMPORTANT: Before proceeding with functional tests, read and
make sure to understand all instructions and information in this
section. Also read the information and instructions of labels and
decals affixed to the switch. Note any options or accessories that
might be installed and review their operation.
3.2 MANUAL OPERATION - ATS CONTACTOR
Do NOT manually transfer the ATS contactor
under load. Disconnect transfer switch from
all power sources by approved means, such
as a main circuit breaker(s).
A manual HANDLE is shipped with the transfer switch and attached
to the inside of the door. Manual operation must be checked
BEFORE the transfer switch is operated electrically. To check
manual operation, proceed as follows:
6
Figure 5 — Auxiliary Contact Diagram
1.
2.
3.
4.
3.2.1
Before proceeding, verify the position of the switch by observing
window "A" in Figure 6. If window "A" reads "ON", proceed with
Step 1, and if it reads "OFF", proceed with Step 2.
Step 1: With the handle attached to the actuating shaft, move
In the transfer switch enclosure, set the Maintenance
Disconnect switch to MANUAL. This prevents the generator
from starting automatically as soon as the UTILITY power
source is turned OFF.
If so equipped, turn the generator's AUTO/OFF/MANUAL
switch to OFF.
Turn OFF both the UTILITY, and both breakers of the generator
selection mechanism.
Note position of transfer mechanism main contacts by
observing display windows in "A" and "B" in Figure 6 as fol-
lows:
• Window "A" ON, Window "B" OFF - LOAD terminals (T1, T2,
T3) are connected to NORMAL terminals (N1, N2, N3).
• Window "A" OFF, Window "B" ON - LOAD terminals (T1, T2,
T3) are connected to STANDBY terminals (E1, E2, E3).
Do not use excessive force when operating
the transfer switch manually or damage to
the manual handle could result.
CLOSE TO NORMAL SOURCE SIDE
handle in the direction of the arrow on the switch cover
until it stops — DO NOT FORCE. Release handle slowly to
release the spring in the switch box. "OFF" now appears
in Window "A" and "ON" appears in Window "B". (Proceed
with Step 2).
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