TDK-Lambda HWS 3000G - Parallel Operation

INSTRUCTION MANUAL
HWS 3000G
TDK-Lambda
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6-9. Parallel operation
Four types of parallel connection are possible: parallel operation to increase output current, N+1
redundant operation, connection as a backup power source (1+1 redundant operation), and leader-
follower.
When using series-parallel connections, connect series-connected units in parallel.
6-9-1. Parallel operation to increase output current
(A) When using in constant voltage output mode
Connecting CB to CB terminal and AG to AG terminal, the current balancing function activates
and output current of each power supply is equivalently supplied to load.
The CB and AG terminals are isolated from the power input and output circuits.
Wire to CB terminal, AG terminals shall be as short as possible and same length with twist.
(B) When using in constant current output mode
Connect the CC and AG terminals between the power supplies, and apply an external voltage
between the CC and AG terminals.
The CC and AG terminals are isolated from the power input and output circuits.
Wire to CC terminal, AG terminals shall be as short as possible and same length with twist.
・Adjust the output voltage of each power supply to be same value within 1%.
・Use same length and type of wires for all load lines.
・Parallel operation is possible up to 10 units. Maximum value of output current in parallel is up to
95% of all paralleled models.
・There is a possibility that output voltage dips at dynamic load change.
・When changing the output rise speed settings (both current and voltage) using the communication
function, be sure to use the same settings for all power supplies.
TOPTOP
(A) When using in constant voltage output mode
(B) When using in constant current output mode
+S
+L
-
L
-S
+V
-V
+S
+L
-L
-S
+V
-V
CB
AG
CB AG
Power
supply
Power
supply
＋
－
Load
+S
+L
-
L
-S
+V
-V
+S
+L
-L
-S
+V
-V
CC
AG
CC AG
Power
supply
Power
supply
＋
－
Load
CC
AG