ABB Zenith
3
ZTSCT / ZBTSCT Operation & Maintenance Manual
Installation
(cont’d)
Engine Start
Control Connections
The engine-start terminals are clearly identified by a
label on the microcontroller backplate. In the case of
manual transfer switches, or in other applications not
requiring the microprocessor, clearly marked terminal
blocks are provided in the upper left corner of the
control panel for the engine start control wires.
Figure 3 shows location of engine start connections
for Bypass Isolation Transfer Switch. Figure 6 (pg.5)
shows location of engine start connections for
Automatic Transfer Switch.
Terminals for field connections to the A3 Source 2 auxiliary
contacts and the A4 Source 1 auxiliary contacts are also
provided. These terminals are clearly marked and appear
on the side of the power panel. On 400 amp metal frame
units these terminals appear on the bracket above the
operator handle.
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
: The equipment rating nameplate on
the transfer switch lists the voltage.
See
Figure 4.
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 circuit breaker.
7.
Start the generator’s engine.
NOTE
: The controller will illuminate Source 2
Available
LED
when preset voltage
and frequency levels are reached.
8.
Verify the phase to phase voltages at Source 1
line terminals.
9.
Verify that the phase rotation of Source 1
is the same as the phase rotation of
Source 2.
10. Shut down the generator’s engine.
11. Place the starting control in the Automatic position.
12. Complete the visual inspection of the transfer switch.
13. Close the enclosure.
14. Lock the enclosure.
Figure 2
E
4
5
6
1
2
3
P Relay
(Engine Start)
Contact rating is
10 Ampere at 120VAC
or 28VDC Gold plated
Figure 3A –
Horizontal
Bypass/Isolation
Transfer Switch
Customer
Connections
Control Power Supply
Input/Output
option relays.
Engine Start
Connections
E11
E12
E12A
E13
Auxiliary contact
connections.
A4-1
A4-1
A4-2
A4-2
A3-1
A3-1
A3-2
A3-2
XBN
XBE
Interlock Logic
Assembly
ATR
A4B-1
A4B-1
A3B-1
A3B-1
RNH
Interconnect plug plate
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.
DANGER
Figure 3 (Typical)
