ABB Zenith ZBTS T Series - 3. Operating Procedures

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34ZBTS_30-1200A rev.A / 1SCC303043M0201
1
LED Indication Description
Power led
Lamp
test
l
Off
load
test
ll
Auto
Alarm reset
On
load
test
Bypass
time
delay
Generator
stop delay
4 min
30 s
ΔU 10% / Δf 5%
ΔU 15% / Δf 10%
ΔU 20% / Δf 10%
0
1
2
3
4
5
10
15
20
30
S1 Failure
delay
[s]
S1 Return
delay
[min]
Manual
retransfer
On
Priority
No priority
In-phase
monitor
On
AUTO
!
S1 S2
LOAD
l
ll
O
ON, fixed light Power supply and communication present
 Power supply present, communication
absent between switch and the HMI
OFF No power available for HMI.
S1 and S2 leds
Off
load
test
ll
ON
Auto
Alarm reset
On
load
test
Bypass
time
delay
4 min
30 s
4
5
10
15
20
30
S1 Return
delay
[min]
4 s
0 s
O
OFF
Manual
retransfer
Auto
config
Priority
In-phase
monitor
AUTO
!
LOAD
l
ll
O
S1 S2
ON, fixed light 
defined limits
 Undervoltage
 Invalid frequency
 Unbalance
 Overvoltage
 Incorrect phase sequence
 Phase missing
 Generator stop delay ongoing
yyn yynyy Neutral disconnected
OFF No voltage
—
3.1 LED Functionality in HMIs
—
Fig. 3.1 LEDs in delayed transition -type switches, I - O - II.
I - O - II
Manual
retransfer
Auto
config
Priority
In-phase
monitor
AUTO
!
S1 S2
LOAD
l
ll
O
LED functionality in HMIs is similiar for
both Bypass and ATS switches.
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3. Operating