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2.5
CONNECTING START CIRCUIT
WIRES
Control system interconnections consist of N1 and N2, and leads
23 and 194/15B. Control system interconnection leads must
be run in a conduit that is separate from the AC power lead.
Recommended wire gauge sizes for this wiring depends on the
length of the wire, as recommended in the following chart:
MAXIMUM WIRE LENGTH
460 feet (140m)
461 to 730 feet (223m)
731 to 1,160 feet (354m)
1,161 to 1,850 feet (565m)
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 pre-
sented 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
DANGER
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.
RECOMMENDED WIRE
SIZE
No. 18 AWG.
No. 16 AWG.
No. 14 AWG.
No. 12 AWG.
Section 3 — Operation
RTS "HS" Type 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.
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.
Figure 3.1 — Actuating Transfer Switch
Move handle UP for the
NORMAL (UTILITY) position.
Move handle DOWN for the
GENERATOR (STANDBY) position.
Attach handle to
the moveable contact
carrier arm.
NOTE: Return handle to
storage position in enclosure
when finished with manual transfer.
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