Selector For Setting Delay Times Ts And Tbs - ABB ATS021 Installation And Operating Instructions Manual

Installation and operating instructions, ATS021

5.4.2 Selector for setting delay times Ts and Tbs

The delay times can be set by means of rotary switch Ts, see Figure 5.1/12 on the front panel.
The time settings possible are:
Time delays Description
Opening delay of main line CB1 after detection of a fault in
the mains (Generator is not in use)
TS Delay
Generator start delay after detection of a fault in the mains
(Generator in use).
Opening delay of emergency line CB2 after detection of
TBS Delay
power restored on main line.
Table 5.6: Description of ATS021 delay time
Two different sections are available:
• section Tbs=Ts: select time Ts by turning the rotary switch to one of the possible positions. ATS021
uses a time Tbs equal to time Ts selected.
The possible selections are 0s, 10s, 20s, 30s.
• section Tbs=300s: select time Ts by turning the rotary switch to one of the possible positions. ATS021
uses a fixed time Tbs of 300sec.
The possible selections for Ts are 0s, 10s, 20s, 30s.
Figure 5.3: Description of Ts rotary selector
2
5.
Ts
Tbs=300s
0s 10
30
20
20
10 30
0 s
Tbs=Ts
18
Using the automatic transfer switch
Value
0...30s
0...30s or Fixed
300s