14
AUTOM ATI C TR A N S FE R SWITCH , OTM _C _ 21D
The 9-bit dial is used to control the switch for circuit testing, and the mismatch with
the load power supply will result in testing and transfer failure. Therefore,carefully read
this guide and set correct parameters based on the actual situation before using this
product.
Table 4. Dip switch
Dip switch setting
1. Switching delay Ts: The delay of switcing from
primary line to secondary line in automatic
mode; Choose from 0, 1, 2, 3, 5, 10, 15, 20, 25,
and 30 seconds.
DIP
No.
Function
Setting
1, 2
Pole setting
01
10
11
00
2 poles
3 poles
4 poles
Invalid setting
3, 4
Mode
setting
01
10
11 (default)
00
No line
priority
Manual back
switching
Line priority LN1
Invalid setting
5, 6
Voltage setting
01
10
11
00
240VAC/415VAC 230VAC/400VAC 220VAC/380VAC
Invalid setting
7
Frequency setting
0
1 (default)
60 Hz
50 Hz
8
Generator
selection
0
1 (default)
No
Yes
9
Generator stop
delay setting
0
1 (default)
240s
30 s
Figure 14.
The 9-dip switch is used to set the
working modes of transfer switch
