ABB Zenith ZT30 Operation And Maintenance Manual page 28

Section 6.0: Entelli-Switch 250 Controller
Inspection Prior to Initial Energization
DANGER
DANGER
Hazardous Volatge Can Cause
Severe Injury Or Death
Turn OFF all power before installation, adjustment or
WARNING
WARNING
removal of transfer switch or any of its components.
CAUTION
NOTICE
NOTICE
CAUTION
inhibit automatic transfer. Engine Gen-Set could
start when engine control wires are attached.
Prior to energizing the transfer switch, perform the following:
1. With a vacuum, remove any debris collected on the
switch during shipment or installation.
2. Check engine start connections. The engine-start relay is
located on the Electrical Panel (Figures S5-13, item F).
The E contact provides the engine start signal from the
automatic transfer switch controller to the genset.
3. Verify the correct connection of all control wires.
4. Check settings of all timers and adjust as necessary.
5. Adjust any optional accessories as required.
6. Verify that all Source 1, Source 2 and Load cables are
correctly connected to the clearly marked terminals on
the unit.
7. Verify the number and sizes of required cable lugs.
8. Verify equipment ground cable(s) are installed per NEC
and/or local codes.
9. Verify that all cable lug connections are tightened in
accordance to the Fascia label.
10. Remove surface oxides from cables by cleaning with a
wire brush.
11. Make sure that all covers and barriers are installed and
properly fastened.
12. Ensure all sources that are to be connected to the ATS
have been fully commissioned and any voltage regulation
systems have been fully commissioned.
Zenith Automatic Transfer Switch | new.abb.com/low-voltage
Engine Start Control Connections
The engine-start relay is located on the Electrical Panel
as indicated in Figure S5-13. Terminals on the relay base
can be accessed for manual transfer switches, or in
other applications not requiring the microprocessor.
contacts and the A4 – Source 1 auxiliary contacts are also
provided. These terminals are clearly marked and appear on
the left side of the Electrical Panel (item H in Figure S5-13).
Initial Testing and Energization
of the Switch Manual Testing of
Mechanism - MX250
A manual Charging Handle is provided with the transfer switch
and S5-6 for location of Charging Handle). Manual operation of
the switch may be checked before it is operated electrically.
Insert the handle and operate the transfer switch between
the Source 1 and Source 2 positions. After insuring the
switch mechanically transfers adequately, return the
switch to Source 1 position, remove the handle and return
it to the holder provided. Before proceeding, refer to the
information package supplied with the ATS. Read and
understand the information on all accessories installed.
Please refer to Sections 4 and 5 for Sequence of Operations
for Standalone ATS and Bypass Isolation ATS respectively.
Initial Energization
Before proceeding, refer to the information package
supplied with the ATS and read and understand
the information on all accessories provided.
1. Unlock the enclosure.
2. Open the enclosure.
3. Verify the correct system voltage.
NOTE: Voltage is listed on the Fascia label. Figure S4-2 shows the location of the
Fascia for both ATS and Bypass Isolation ATS.
4. Close Source 1 circuit breaker.
NOTE: The controller will illuminate Source 1 Available LED if proper
voltage is sensed.
5. Verify the phase to phase voltages at Source 1
line terminals.
6. Close Source 2 source circuit breaker.
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