ABB Zenith ZTX Series Operation, Maintenance, And Installation Manual page 32

Automatic transfer switches
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32
Off
On
Lamp
load
load
test
test
test
I and II leds
l
O
S1 Failure
S1 Return
delay [s]
delay [min]
S1
ON
OFF
0
2
4
10
1
3
5
15
l
ll
LOAD
Off
Lamp
S1
load
test
test
l
ll
Generator
Auto
In-phase
Priority
stop delay
config
monitor
l
S1 Return
LOAD
delay [min]
ON
4
10
20
5
15
30
Load led
S1
O
In-phase
Priority
l
ll
monitor
Off
On
On
No priority
load
load
Bypass
LOAD
Auto
time
test
test
Alarm reset
delay
l
O
Auto led
ll
ON
OFF
In-phase
Priority
ON
monitor
S2
On
Off
4 min
5
15
30
!
Dropout ΔU / Δf
AUTO
Off
On
Bypass
Alarm led
load
load
time
test
test
delay
S2
O
!
ON
OFF
AUTO
Manual
Priority
retransfer
Table 3.1 LED functionality
No priority
On
Source 1
Off
Z e n i t h Z T X S e r i e s AT S , O P E R AT I O N , M A I N T E N A N C E , A N D I N S TA L L AT I O N G U I D E
Bypass
Auto
time
Alarm reset
delay
ON, fixed light
ll
S2
ON
20
30 s
0 s
30
4 min
4 s
!
AUTO
Flash/1 s, 50%/50 %
On
Bypass
Auto
S2
load
time
Alarm reset
test
delay
!
O Position
Manual
delay
retransfer
O
ll
AUTO
OFF
ON
30 s
0 s
4 min
4 s
S2
ON
Manual
!
retransfer
OFF
Bypass
Auto
On
time
AUTO
Alarm reset
delay
ll
ON
Manual
ON, fixed light
retransfer
No priority
On
Flash/1 s, 50%/50 %
Source 1
Off
4 s
Flash/1 s, 90%/10 %
ΔU 5% / Δf 5%
5 flashes/1 s, 50%/50 %
Auto
Alarm reset
OFF
ON, fixed light
ll
2 quick flashes/1s
ON
5 flashes/1 s, 50%/50%
Flash/1 s, 50%/50%
Flash/1 s, 10%/90%
Switch position is indicated with fixed
light in I, O or II led. Only one can be on
simultaneously
Delay ongoing. Going to move away from
the blinking status
Supply ok and connected to load
Not connected to load
Switch is in automatic mode
Test on load
Test off load
Autoconfig completed
No alarms
Handle attached, locked, other alarm
Control Alarm
Auto configuration ongoing
Control Retry
Auto mode off

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