Kikusui PBZ20-20, Руководство пользователя

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PBZ
67
Protection Features and Alarms
2
Ba
sic Featu
res
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Even when V-LIMIT (the voltage limit) is selected, OVP is enabled.
This OVP (hereafter referred to as “120 % OVP”) is enabled with positive and negative
activation points that are approximately 120 % of the rated value (fixed) even when V-
LIMIT (the voltage limit) is selected. Unlike other OVPs, the activation points of 120 %
OVP cannot be changed.
You cannot set the overvoltage protection mode to V-LIMIT (the voltage limit) and OVP at
the same time. However, 120 % OVP is a special feature that is always enabled even if
you do not select it.
120 % OVP operates in the presence of short-term, transient changes that cannot be
limited by V-LIMIT (the voltage limit). The 120 % OVP mode is the same as the mode that
you have specified with OVP/OCP ACTION (OUT OFF or POW OFF).
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Response speed of V-LIMIT (the voltage limit) and I-LIMIT (the current limit)
The response speed of V-LIMIT (the voltage limit) is interlocked with the CV mode voltage
response setting. The response speed of I-LIMIT (the current limit) is interlocked with the
CC mode current response setting.
When you are using the PBZ in CV mode, set the CC mode current response setting to
set the I-LIMIT (the current limit) response speed. When you are using the PBZ in CC
mode, set the CV mode voltage response setting to set the V-LIMIT (the voltage limit)
response speed.
The OVP and OCP operations are independent of the CV mode voltage response setting
and the CC mode current response setting.
Overheat protection (OHP)
This protection feature is activated when the PBZ’s internal temperature rises to an abnormal
level. The output is turned off.
OHP protects the PBZ from the following situations.
• When the PBZ is used in an environment that exceeds its operating ambient
temperature range.
• When the PBZ is used in a location that does not provide adequate space around its
inlet and vent holes.
Power limit (sink power)
If you connect a device to the OUTPUT terminal that can supply power, like a battery, the
PBZ is a load to the device. In this situation, there is a limit to the amount of power that the
PBZ can consume. When the PBZ’s sink power becomes too large, it limits its output current
(the sink current to the PBZ) so that the sink power reduces to a constant value.
Bipolar/unipolar
mode Sink power
PBZ20-20 PBZ40-10
Bipolar mode 100 W (TYP) 180 W (TYP)
Unipolar mode 400 W (TYP) 400 W (TYP)