COMEM RIS2 Manuel D'instructions page 8

Technical features
Description and functions
Oil level (Float)
The device indicates any gas evolvement or oil level variation.
- Slight oil level variation or any insignificant gas evolvement is denoted by the
float position between "MIN" & "MAX" on the display.
- At major oil variation level or gas evolvement the float stops at "MIN" and
opens/closes the alarm circuit.
- Any accumulated gas can be drawn off by the valve provided.
Pressure (Pressure switch)
This feature measures the internal pressure of transformer. The normal level is
to be set by the user according to the transformer manufacturer's instructions.
When pressure exceeds a pre set level the alarm circuit is triggered by a change
over contact.
Temperature
"T2" Thermostat switch (Alarm)
The feature measures the internal oil temperature of the transformer.
The normal operating value is to be set by the user according to the transformer
manufacturers instructions. At a pre set temperature the alarm circuit is triggered
by a change over contact (T2).
"T1" Thermostat switch (Stop)
The feature measures the internal oil temperature of the transformer.
The normal operating value is to be set by the user according to the transformer
manufacturers instructions. At a pre set temperature the stop circuit is triggered
by a change over contact (T1).
Thermometer
The device measures the internal temperature of the transformer, which shall
be visualized outside the device through the protection window.
The thermometer is equipped with a drag pointer.
Table 2
General feature
Degree of protection (EN 60529)
Salt-fog tight
UV-Ray resistance (UNI-ISO 4892 / UNI-ISO 4582)
Measuring range
Environment temperature
Cable connection
Cable box (EN 50005 / EN 60947-7-1 / IEC 947-7-1)
Wire section to be used on clamp box
Max. rated pressure
Electrical characteristics
Table 3
Current
Circuit type
Voltage
Electric rating Oil level
Pressure switch
Thermostat
Table 4
8
ac
Ohmic Ohmic inductive
(cosφ > 0,5)
220 127 24 220
2A 2A 2A 2A
6A 6A 6A 2A
16A 16A 16A 4A
Measure
Max 150 cm
3
100 mbar to
500 mbar
30°C to 120°C
30°C to 120°C
30°C to 160°C
IP66
1000 h
500 h
40°C to +120°C
-40°C to 55°C
M 25 x 1.5
According to standard
Up to 2.5 mm
2
500 mbar
Double insulation
dc
Ohmic
127 24 220 127
2A 2A 2A 2A
2A 2A 0,6A 0,6A
4A 4A 0,6A 0,6A
INTEGRATED SAFETY DEVICES RIS2
Checking test value
Locate the magnet close to the float
(between MAX and MIN). Drawn it
downwards until it reaches "MIN".
To reset the float to its correct
position draw the magnet upwards
and detach.
With the internal pressure at least
100mbar set the adjusting knob of the
pressure switch to minimum.
Open the rear cover using both hands,
do not lever at one side only.
The adjustment knob of the alarm
switch "T2" should be set to the
minimum value.
The adjustment knob of the stop
switch "T1" should be set to zero.
The adjustment knob of the stop
switch "T1" should be set to the
minimum value.
The protection window is to be
unscrewed so that the pointer shall
be set to the minimum values.
Ohmic inductive
(L/R < 40ms)
24 220 127
2A 2A 2A
0,6A 0,6A 0,6A
0,6A 0,2A 0,3A
24
2A
0,6A
1,8A