Cutler-Hammer ATVISPE31000XSU, Инструкция по эксплуатации

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I.B. ATS-SD02
Page 25
Effective 5/98
SECTION 7: OPERATION OF BYPASS ISO-
LATION TRANSFER SWITCH
7.1 OPERATOR PANEL
The design of this transfer switch allows quick removal
of the different switching devices for inspection or main-
tenance, or if required, quick replacement.
The bypass isolation switch has two operator panels
with switches and lights (Figure 7-1). The following
descriptions are for those features that are standard
with the bypass isolation switch. Additional features are
described in the options section.
The left control panel has the following standard fea-
tures:
1. Light to indicate if the normal source is available.
2. Light to indicate if the emergency source is avail-
able.
3. Light to indicate if the NORMAL position is ener-
gized, that is, the normal switching device in the
automatic transfer switch is closed.
4. Light to indicate if the EMERGENCY position is
energized, that is, the emergency switching device
in the automatic transfer switch is closed.
5. Push-to-test button allows testing of the transfer
switch. Pushing the button will simulate a power fail-
ure, causing the transfer switch to start the transfer
sequence. If the push button is held down, the
transfer switch will transfer the load to the emer-
gency switch. Releasing the button will restore regu-
lar power.
6. Three-position selector switch to control the genera-
tor:
AUTO — The intelligence circuit of the transfer
switch will start the generator if the normal power
source is not available.
OFF — The intelligence circuit of the transfer
switch will not be able to start the generator, which
eliminates nuisance starts during maintenance.
RUN — The generator will run regardless of the
availability of the normal power source.
The right control panel has the following standard fea-
tures:
1. Light to indicate if the normal switching device is
isolated (only if the normal switching device is
racked out).
2. Light to indicate if the emergency switching device
is isolated (only if the emergency switching device is
racked out).
3. Light to indicate if the normal bypass switching
device is closed.
4. Light to indicate if the emergency bypass switching
device is closed.
7.2 AUTOMATIC OPERATION
The intelligence/supervisory circuits on Cutler-Hammer
transfer switches constantly monitor the condition of
both the normal and emergency power sources. These
Figure 7-1 Bypass Isolation Switch