
2
86
Zenith ZBTS T-series 100-1200A, I N S TA LL ATI O N A N D O PER ATI N G I N S TR U C TI O N
3
9.2.2 Release the Locking Solenoid
The locking solenoids are located behind
the switch mechanism, which is not nor-
mally accessible when the switch is in use.
The automatic transfer switches are elec-
trically interlocked and prevent switches
closing Source 1 and Source 2 at the same
time in Connected location.
If something unexpected happens when
both switches are in the Connected loca-
tion and there is a need to operate an-
other switch to OFF position or the switch
needs to be removed, there is a way to re-
lease the locking solenoids. Even in a situ-
ation where the control circuit has lost its
power, the solenoids are locked and can
only be released when the voltage is
switched on as described below.
Open the lower door of the enclosure. If
the switch is in the Connected or Test po-
sition, see previous page the instructions
how to release the door. PCBA and service
—
Fig. 9.2 Control plate (back side), PCBA and service
solenoid terminals
X22
X12
Then follow the instructions:
1
Disconnect connector X22 from the
PCBA if the ATS interlock solenoids
need to be released. Disconnect
connector X12 from the PCBA if the
Bypass interlock solenoids need to be
released. Connect the disconnected
connector to the service terminals,
see below.
2
Apply 24 V DC to the service
terminals:
+ 24V dc –> to terminals 1 and 5
- 24V dc –> to terminals 2 and 6
If you are not sure of the order of the
connectors, see the wiring markings
or the instruction below:
UMSTBVK 2,5/10-G-5,08
- 1788198
3
You will hear a sound when the
locking solenoids are released and
then you can use the ATS or Bypass
switch via the HMI or manually by the
switch own handle e.g. to the OFF
position, if it is necessary to take the
switch out to the TEST or ISOLATED
positions. For more information of
the switch own handle, see the
TruONE manual 34OX_30-1600.
SERVICE: Release the locking solenoids S1 and S3.
1. Remove connector X22 (release ATS) or X12 (release
BYPASS) from PCB and connect X22/X12 to the
service connector below.
2. Supply 24V DC to the service connectors:
+ 24V DC
→
Terminal 1 & 5
- 24V DC
→
Terminal 2 & 6
3. Operate ATS/BYPASS via HMI or manually by handle.
4. Install the X22/X12 back to the PCB.
—
Fig. 9.3 Control plate (back side), Service
instructions, located near the service terminals
1
solenoid terminals are situated on the
back side of the control plate. See figure
below. Service instructions are also lo-
cated on the control plate on top of the
service terminals.
Содержание Zenith ZBTS T Series
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