Kikusui PLZ1004W, User Manual, Page: 62 / 216

5-6 Basic Operation PLZ-4W
5.3 Types of Protection Functions
The protection function automatically turns off or limits the load when an input that
can damage the internal circuit of the PLZ-4W appears and to protect the equipment
under test.
When a protection function trips, an alarm is activated. When an alarm is activated,
the load is turned off (or limited), and the ALARM STATUS of the J1 connector on
the rear panel (pin 16) turns on (open collector output by a photocoupler).
There are two types of protection functions: those that allow you to set the trip point
and those with a fixed trip point. In addition, for the OCP and the OPP, you can
specify whether to turn off or limit the load when the protection trips.
•
For the operation of the protection function in each operation mode, see appen-
dix A.2, “Basic Operation Modes.”
Overcurrent protection (OCP)
The protection trips when a current that is equal to or exceeds the specified overcur-
rent value or 110 % of the maximum current of each range flows. At this point, the
load is turned off (LOAD OFF) or the current is limited (LIMIT).
To change the protect action, select “1. Setup” | “2. Protect Action” | “OCP” and
specify LIMIT or LOAD OFF.
When LIMIT is specified, the alarm is cleared when the alarm condition is cor-
rected.
•
For a description of setting the overcurrent value, see section 5.4, “Setting the
Protection Function.”
• For a description of changing the menu setup, see section 5.13, “Menu Setup.”
Overvoltage protection (OVP)
The protection trips when a voltage that is equal to or exceeds 110 % of the maxi-
mum input voltage is applied. At this point, the load is turned off.
Overpower protection (OPP)
The protection trips when a power that is equal to or exceeds the specified over-
power value or 110 % of the maximum power of each range is applied. At this point,
the load is turned off (LOAD OFF) or the current is limited (LIMIT).
To change the protect action, select “1. Setup” | “2. Protect Action” | “OPP” and
specify LIMIT or LOAD OFF.
When LIMIT is specified, the limit is cleared when the alarm condition is corrected.
•
For a description of setting the overpower value, see section 5.4, “Setting the
Protection Function.”
• For a description of changing the menu setup, see section 5.13, “Menu Setup.”