Deif AAL-2 User manual

Configuration of the warning relay function
The relay can be reconfigured by means of two jumpers. (The original configuration is
marked on the label). The jumpers are placed on the PCB behind the rear cover, under
the set point potentiometer R213.
The contact function can be configured to either a normally energised contact (NE) or
a normally de-energised contact (ND).
Warning delay
It is possible to choose between No warning delay or 4 s warning delay from the
alarm occurs until the warning relay is activated.
If the system has capacitance to ground, it is recommended to use the 4 s time delay in
order to avoid “false“ warning at power-up, or when capacitive load is switched on.
Example of jumper settings:
Warning delay = 0 s
Warning relay = normally de-energised (ND)

Q
UICK GUIDE
Insulation monitors, AAL-2

Refer to www.deif.com for detailed information
Document no.: 4189320055B

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 P to a phase (if it is a 3-phased network –
connect to any of the phases).
Warning: If a high-voltage “MEGGER” is used, the AAL-2 must be disconnected at
terminal "P" before testing is carried out. Omitting this may result in
damage to the AAL-2.
Test
An instrument self-test can be carried out according to IEC 61557-8, as shown in Fig. 1
below. ¼ W resistance and switch ratings according to network voltages.
3- or 4-wire networks 2-wire networks
Fig. 1
Adjustment of the set point
The requested warning set point is adjusted by means of the potentiometer on the upper
left corner on the back of the instrument.
If precise warning setting is wanted, connect a known resistor corresponding to the wanted
setting between P and PE. Then adjust the potentiometer until the warning LED is
activated.
Typical setting:
Typical warning set point: 22 kΩat 1 M range, or 220 kΩat 10 M range.
Place the red marker pointer at the set point.
