Bender ISOMETER isoPV with AGH-PV, Manual

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Function
17 isoPV_D00024_02_M_XXEN/07.2018
If the reading is below the selected response values Alarm 1/Alarm 2, the associated
alarm relays respond, the LEDs "Alarm 1/2“ light up and the measuring value is indica-
ted on the LC display (in the event of DC insulation faults, the faulty supply line is indi-
cated). If the terminals R1/R2 are bridged (external reset button [N/C contact] or wire
jumper), the fault message will be stored. Pressing the reset button, resets the fault
message, provided that the insulation resistance is at least above 25 % and at least 1 kΩ
above the actual response value. The fault memory behaviour can also be set in the
"ISO SETUP“ menu, by selecting the submenu Memory: on/off.
*) measurement method
(Adaptive Measuring Pulse), a measurement method developed by Bender
(European Patent: EP 0 654 673 B1).
3.4.1 Measurement profiles
The measuring circuit of isoPV can be adjusted in the ISO ADVANCED/MEASURE menu
to match different requirements:
DC = Suitable for pure AC systems
AMP = Suitable for converters with frequencies > 10Hz
AMP2 = Suitable for converters with frequencies < 10Hz
AMP3 = Suitable for photovoltaic plants with crystalline cells
AMP4 = Suitable for photovoltaic plants with thin-layer cells
Also refer to the measurement methods table starting from Page 42.
3.4.2 Self test
A self test can be started automatically or manually by means of the test button. In order
to guarantee high functional reliability, the ISOMETER
®
provides comprehensive self
test functions. After switching the device to the supply voltage, all internal measuring
functions, the components of the process control, such as data and parameter memory
as well as system and earth connections, are checked using the self test functions. The
progress of the self test is shown on the display by a bar graph. Depending on the IT sys-
tem conditions, the self test is completed after 15…20 seconds, then the message "Test
ok!" appears on the display for approximately two seconds. Then the device returns to
the normal measuring mode and the currently measured value will be displayed once
the measuring time has elapsed.
When a device or connection fault is found, the message "!Error!" appears on the dis-
play, the device error LED lights, the relay K2 (21-22-24) switches and the corresponding
fault message (see table) will be indicated. If such a device error occurs, another self test
will be started after approximately one minute. If no more faults are detected, the fault
message will automatically be deleted, the system fault LED will go out.
AMP Plus
AMP Plus