68
Table 6-18 The driver test description of 10kVA bypass board
Component and its tag number
Waveform
Remark
Bypass SCR
Q1,Q2,Q3,Q4,Q5,Q6
High level
1V-1.5V
；
Low level
0V
；
If it is found that the individual SCR is abnormally driven during the drive test, please re-check whether the
device is replaced, and check whether the corresponding drive module is damaged.
6.3.2 Maintenance of 15kVA/20kVA bypass board.
The 15kVA and 20kVA model share the bypass board, and the board mainly includes the bypass output
circuit and the output current sampling circuit. Among them, the frogile components have bypass SCR, which are
shown in Table 6-19, and its position in the board is shown in Figure 6-19.
Table 6-19 The forgile components 15/20kVA bypass board
Components
Tag Number
Specifications
Alternative
specification
Bypass SCR
Q1,Q2,Q3,Q4,Q5,Q6
VS-50TPS12A
BT155W-1200T
Fig.6-19 The key components identification of 15/20kVA bypass board
The detailed maintenance steps are as follows:
