07/05/01 M39_EN.indd
ENGLISH
ENGLISH
USE AS TROUBLE INDICATOR:
Placed on the front panel, the insulation monitor (A3) is a device
which controls continuously the insulation of the generation a.c.
circuits towards the ground.
USE AS TROUBLE INDICATOR AND INTERVENTION:
The insulation monitor controls a device (release coil, contactor,
etc.) which opens the whole circuit, lifting voltage in the whole
part of the machine a.c. generation.
USE OF SRI3/D2 MODEL
:
- To change the setting, please call our Technical Assistance
Department
- The warning light ON shows that the device is powered.
- By pressing a long time (5 seconds) the Test push-button,
the ALARM and PRE-ALARM leds will light on, releasing it
the PRE ALARM led goes off while the ALARM led remains
lit. The pressure on the Reset key brings the device back to
initial conditions.
- If the insulation resistance goes down below the fixed PRE
ALARM value, the PRE ALARM led will light up and switches
the contact of PRE-ALARM.
If the insulation resistance goes down furtherly and becomes
inferior to the fixed value for the ALARM, the ALARM led lights
and switches also the contact of ALARM relay.
- After having checked the device and removed the cause of
the problem, re-establish the circuit pressing the push-button
RESET.
LEGEND:
1. Adjustment of Alarm threshold
2. Set-alarm dip-switches
3. Led, pre-allarm indication
4. Led , power indication
5. Led Alarm indication
6. Test push-button
7. Reset push-button
8. Adjustment of- PRE-ALARM threshold
NOTE
DO NOT INTERVENE ON THE SETTING OF THE PROTEC-
TION SWITCH. BEFORE USING THE MACHINE CHECK
THE ON WARNING LAMP LIGHTING.
!
M
39.10
ENGINE PROTECTION
INSULATION MONITORING
REV
.1-1
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