ABB ISL-A 48 Manual de instruções - Página 3
Procurar online ou descarregar pdf Manual de instruções para Controlador ABB ISL-A 48. ABB ISL-A 48 4 páginas. Device for insulation permanent control for isolated networks it
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LEGEND
Auxiliary power supply
Terminals 1-3
The auxiliary power supply can be the same as the network to control.
Earth reference connection
Terminal 11
Connection to the earth or the protection conductor for measurement reference.
Relay output connections
Terminals 7-8-9
Changeover contact to indicate there is a fault, max 5A 250V on resistive load.
Remote TEST connection
Terminal 5
For the TEST function, it's possible to connect between this terminal and the ground (or protection conduc-
tor) a normally open contact to replicate the function of the TEST button externally to the device.
Automatic or remote RESET connection
Terminals 4-12
It's possible to connect between these terminals a RESET button externally to the device, with a normally
closed contact to a remote reset function.
Make a short circuit between these terminals for a manual RESET with only the RESET button on the front of
the device. If the two terminals are not connected the device will operate with automatic RESET when the low
insulation condition stops.
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FUNCTIONALITY
In normal condition, with insulation value higher than the set threshold, the instrument has the green LED on.
Pressing the TEST button the TRIP LED of alarm signalling and the output relay will be activated.
Depending of the connection the RESET will be automatic when the TEST button is reIeased or using a remote
button or manual using the RESET button on the front panel.
If there is a low insulation in a direct line on + polarity (connection to terminal 1) will be activated the TRIP and
+ signalling, while the low insulation is present on the – polarity (connection to terminal 3) will be activated
the TRIP and – signalling.
In a alternate line all LED (TRIP, + and –) will be turned on.
The TRIP signalling will disappear, automatically or manually with RESET button, only when the insulation
come back higher than the set threshold, while the LED + and – work only in automatic RESET.
2024-01-24
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