BECKWITH ELECTRIC M-3520, Instruction Book

Page: 45 / 217

2–12
M-3520 Instruction Book
Phase Angle Check Logic
Dead Line/ Dead Bus Check Logic
Dead Line/ Dead Bus Check Input Initiate Logic
Dead Input Enable
AND
OR
AND
AND
AND
AND
AND
AND
AND
OR
2
OR
3
1
AND
AND AND
AND
AND
(V 1- V 2) < Delta V Limit
Delta V Is Enabled
Delta F Is Enabled
V1 Lower Voltage Limit
>
V1 Upper Voltage Limit
<
V2 Lower Voltage Limit >
V2 Upper Voltage Limit <
Phase Angle Phase Limit <
(F 1- F 2) < Delta F Limit
Phase Angle OK
To Figure 2-7
AND
AND
(V 1- V 2) < Delta V Limit
Delta V Is Enabled
Delta F Is Enabled
(F 1- F 2) < Delta F Limit
Delta V and Delta F Check Logic
With Delta V OR Delta F Enabled
Delta V and Delta F Check Logic
With Delta V AND Delta F Enabled
V1
pos
Dead Limit
<
Dead V1 Enabled
V2 > Dead Limit
Dead V2 Enabled
V1
pos
Dead Limit
<
V2 < Dead Limit
V2 < Dead Limit
Dead V1 & V2 Enabled
V1
pos
Dead Limit
<
V2 > Dead Limit
Dead V1 Enabled
V1
pos
Dead Limit >
V1
pos
Dead Limit
>
V2 < Dead Limit
AND
Dead V2 Enabled
Selected INPUT Is Activated
To Figure 2-7
To Figure 2-7
AND
Figure 2-6 Logic Diagrams