KEPCO KLP Series User Manual, Rev 4 - Manual (Page 37)

KLP-HV 091313
2-11
FIGURE 2-3. REMOTE SENSING
2.7.6 SERIES OPERATION
Units may be connected in series to obtain higher output voltages. Each power supply in the
series may be protected by a clamping diode connected in its non-conducting direction in paral-
lel with the output. This diode protects the power supply outputs against secondary effects in the
event of a load short. (Note that this is NOT the same as the blocking diode used for parallel/
redundant operation.) Selection of the clamping diode is entirely dependent upon output volt-
age/current parameters. The clamping diode must be rated for the maximum voltage and cur-
rent of the series connection. Several clamping diodes in parallel may be required to meet the
total current rating. The user must also respect the ±600V d-c maximum isolation from output to
chassis when determining the maximum series voltage. Figure 2-4 shows a series connection of
two KLP power supplies using remote sensing. Kepco strongly recommends that series applica-
tions employ master/slave control (available on standard models only) as described in PAR’s.
2.7.8 and 3.2.14. Users considering series configuration of KLP are urged to contact Kepco
Application Engineering first to discuss application details before ordering KLP power supplies
intended for Series operation.
2.7.7 PARALLEL OPERATION
Identical KLP power supply models may be connected in parallel in order to provide increased
output current to a common load (see Figure 2-5). This permits the user to obtain significantly
higher load ratings than for a single KLP power supply. The number of power supplies required
is determined by dividing the required load current by the current rating of the applicable KLP
model, and rounding up to the next whole number when necessary. KLP power supplies utilize
active current sharing circuitry to distribute the load current equally among the paralleled units.
When operating KLP power supplies in any parallel configuration, load sharing must be imple-
mented among the paralleled modules. Kepco strongly recommends that parallel applications
employ master/slave control (available on standard models only) as described in PAR’s. 2.7.8
and 3.2.14.