KEPCO BOP 5-20DL, Operator'S Manual

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BOP 5-20DL 081915
Figure 3-26 shows a simple parallel master/slave connection of no more than two BOP power
supplies. The configuration shown in Figure 3-26 can be used for master/slave parallel connec-
tion of two BOP power supplies (three are shown in Figure 3-27). The configuration shown in
Figure 3-27 is more stable and accurate than that shown in Figure 3-26 since is includes com-
pensation that eliminates the parasitic voltage drop on the COM connections of the slaves.
1. Connect the BOP supplies as shown in Figure 3-26 or 3-27.
a. Set the MODE switches and the VOLTAGE and CURRENT CONTROL switches as
directed in the set-up diagram, Figure 3-26 or 3-27.
b. Load-wire size should be rated for at least the maximum load current and load-wire pairs
should be twisted or tied together to keep the inductance and EMI as low as possible.
Use shielded cable for the drive signal connection between the BOP’s. Connect the
shield to common ground. For remote sensing, use #22 AWG twisted pair wires.
c. Both BOP power supplies should be connected to the power line using a common circuit
breaker. Alternatively, the BOP Circuit-Breaker Control Circuit, as described in PAR. 3.6.2
can be used to interconnect both BOPS in such a way, that if one of them should fail, the
other one is automatically shut down also.
2. Following the set-up procedure as described above, turn BOP’s on and commence opera-
tion. The system as shown in the set-up diagram, Figure 3-26 or 3-27, operates in the Volt-
age Mode, since the MASTER MODE switch is set to VOLTAGE. For operation in the
current mode, set the MASTER MODE switch to CURRENT.