
8
EN
INTR ODUCTION
This isometer (i.e. insulation monitoring device) is a safeguard for people
who work with a floating system, for example, a generator or DC-AC
inverter. This will be in compliance with the N N 1010 standard. The
isometer will ensure there is automatic switching off when there is a
phase leak or neutral earthing. The isometer, therefore, replaces the
RCD, which may not be used with a floating system. You can also read
what the insulation resistance is for the system from the isometer. Also
see the "Insulation resistance" section.
As prescribed by the N N 1010 standard, the isometer is insensitive to
any DC components in the current source. The model ISO 230-16C is
specially developed for the use in combination with a combi (battery
charger and inverter all-in-one) or a power transfer switch.
I N ST A LL A T IO N
Impor an :
-Make sure the system is completely voltage free during the
installation and connection!
-The installation may only be carried out by qualified engineers.
-Only one isometer may be connected for each power system.
Before you start!
Before the isometer is installed, a check must be performed to determine
whether the power source is indeed a floating system.
Once the power source has been integrated into the vehicle, the
following steps can be taken:
Activate the current source and measure the outgoing voltage. Measure
the voltage of the phase (L1) and neutral (N) when compared to the
safety earthing. They must both be 115 V AC; therefore, L1 with safety
earthing = 115 V AC and N with safety earthing = 115 V AC. If this is
the case, it is a floating system and the inverter housing may be earthed
on the chassis. The isometer can be installed.