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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 could be
done to the switch.
IMPORTANT: Before proceeding with functional tests, read and
make sure all instructions and information in this section are
understood. 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
Do NOT manually transfer under load.
Disconnect transfer switch from all power
sources by approved means, such as the main
circuit breaker(s).
A manual HANDLE is shipped with the transfer switch. Manual
operation must be checked BEFORE the transfer switch is operated
electrically. To check manual operation, proceed as follows:
1.
Turn the generator's AUTO/OFF/MANUAL switch to OFF.
2.
Turn OFF both UTILITY (service disconnect circuit breaker)
and GENERATOR (generator main line circuit breaker) power
supplies to the transfer switch.
3.
Note position of transfer mechanism main contacts by
observing the moveable contact carrier arm. This can be
viewed through the long narrow slot in the inside cover of the
ATS. The top of the moveable contact carrier arm is yellow to
be easily identified.
• Manual operation handle in the UP position - LOAD terminals
(T1, T2) are connected to UTILITY terminals (N1, N2).
• Manual operation handle in the DOWN position - LOAD termi-
nals (T1, T2) are connected to EMERGENCY terminals (E1,
E2).
Do not use excessive force when operating the
transfer switch manually or damage could be
done to the manual handle.
6
3.2.1 CLOSE TO UTILITY SOURCE SIDE
Before proceeding, verify the position of the switch by observing
the position of manual operation handle in Figure 3.1. If the handle
is UP , the contacts are closed in the NORMAL (UTILITY) position,
no further action is required. If the handle is DOWN, proceed with
Step 1.
Step 1: With the handle inserted into the moveable contact carrier
arm, move handle UP . Be sure to hold on to the handle as
it will move quickly after the center of travel.
Step 2: Remove manual operating handle from moveable contact
carrier arm. Return handle to storage bracket.
3.2.2 CLOSE TO GENERATOR SOURCE SIDE
Before proceeding, verify the position of the switch by observ-
ing the position of the manual operation handle in Figure 3.1. If
the handle is DOWN, the contacts are closed in the GENERATOR
(STANDBY) position. No further action is required. If the handle is
UP , proceed with Step 1.
Step 1: With the handle inserted into the moveable contact carrier
arm, move the handle DOWN. Be sure to hold on to the
handle as it will move quickly after the center of travel.
Step 2: Remove manual operating handle from moveable contact
carrier arm. Return handle to storage bracket.
3.2.3 RETURN TO UTILITY SOURCE SIDE
Step 1: Manually actuate switch to return manual operating handle
to the UP position.
Step 2: Remove manual operating handle from moveable contact
carrier arm. Return handle to storage bracket.
3.3
VOLTAGE CHECKS
1.
Turn ON the UTILITY power supply to the transfer switch using
the UTILITY SERVICE DISCONNECT circuit breaker.
P ROCEED WITH CAUTION. THE TRANSFER
SWITCH IS NOW ELECTRICALLY HOT.
CONTACT WITH LIVE TERMINALS RESULTS
IN EXTREMELY HAZARDOUS AND POSSIBLY
FATAL ELECTRICAL SHOCK.
2.
With an accurate AC voltmeter, check for correct voltage.
Measure across ATS terminal lugs N1 and N2. Also check N1
to NEUTRAL and N2 to NEUTRAL.
3.
When certain that UTILITY supply voltage is correct and compat-
ible with transfer switch ratings, turn OFF the UTILITY supply to
the transfer switch.
4.
On the generator panel, set the AUTO/OFF/ MANUAL switch to
MANUAL position. The generator should crank and start.
5.
Let the generator stabilize and warm up at no-load for at least
five minutes.
6.
Set the generator's main circuit breaker (CB1) to its ON or
CLOSED position.
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