Mounting instructions
To ensure correct mounting, and to obtain the intended functionality of your product, DEIF A/S
recommends that you read these guidelines carefully before you mount the product.
Use the correct tools for mounting, and do not exceed the recommended tightening torques.
DEIF A/S warranty will be lost for products that are damaged because of incorrect tools used
for mounting, or because of excessive tightening of the terminals and screws.
Tools
Do not use electric screwdrivers
Only use two fingers on the screwdriver
Tightening torques
For terminals: Max. 0.5 Nm
For mounting screws: Max. 0.5 Nm
Installation
Verification:
Verify that the instrument configuration is according to application.
Aux. supply:
Connect terminals to correct voltage.
Measuring circuit:
Connect PE to ground and L- to the positive or negative terminal of the
monitored network.
Warning:
If a high-voltage “MEGGER” is used, the ADL must be disconnected before testing is
carried out. Omitting this may result in damage to the ADL.
Test
An instrument self-test can be carried out according to IEC 61557-8 as shown in
Fig. 1
below. Test
resistor = 1 kΩ/0.25 W (recommended value).
Fig. 1
Adjustment of the set point
A new feature in variants 04, 05 and 06 makes accurate setting of set point much easier. When the
set point potentiometer at the rear of the instrument is turned, the insulation monitor automatically
goes to meter indication of set point during setting and power-up.
As soon as the set point potentiometer is turned, the insulation monitor enters setting mode. This is
indicated by the fast flashing of the SUPERVISION LED, and by the meter pointer showing the set
point setting instead of actual measurement.
When the desired set point level is reached, the product automatically returns to normal measuring
mode after a few seconds, by which the SUPERVISION LED stops flashing fast, and the meter
pointer returns to normal reading.
Set point test/control:
During power-up, for a few seconds, the meter pointer shows the actual set
point setting while the SUPERVISION LED is flashing fast. This function enables a test function for
fast control of settings from the front of the switchboard.
