ABB Zenith ZTS T Series - 2.1.1 Operation Types

18
Zenith ZTS(D) 30-1200A ATS, QUICK START USER MANUAL
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LED functionality in HMI
—
Fig. 12 On left: LEDs in ZTSD, delayed transition, I - O - II. On right: LEDs in ZTS, open transition I - II.
I - O - II
I - II
Manual
retransfer
Auto
config
Priority
In-phase
monitor
AUTO
!
S1 S2
LOAD
l
ll
O
Lamp
test
l
ON
Off
load
test
ll
ON
Auto
Alarm reset
On
load
test
Bypass
time
delay
Generator
stop delay
4 min
30 s
ΔU 20% / Δf 10%
0
1
2
3
4
5
10
15
20
30
S1 Failure
delay
[s]
S1 Return
delay
[min]
O Position
delay
4 s
0 s
O
OFF
Manual
retransfer
Auto
config
Priority
In-phase
monitor
AUTO
!
S1 S2
LOAD
l
ll
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
OFF No voltage
At the top of ZTS 30-1200 A, 200-480 Vac ATS, there is a set of LEDs intended to
model the state of the transfer switch sources, position, alarms, and mode.
A considerable amount of information can be deciphered from the LED states.
See the tables below for more information.