Contrel RI-R38 User manual

RI-R38 instruction manual IM810-U v0.3 pag. 1 / 4
INSTRUCTION MANUAL
IM810-U v0.3
RI-R38
DEVICE FOR INSULATION PERMANENT CONTROL FOR NEUTRAL NETWORKS (IT)
GENERAL
RI-R38 is a device that allows to control the insulation to earth in alternating neutral networks up to 440 V (IT
systems).
Putting a continuous component measure signal between the insulated line and earth it’s possible to control the
insulation resistance reading the dispersion current generated to earth.
On the frontal panel of RI-R38 there is the signalling of device ON, the signalling of tripping TRIP (low insulation), a
test and a reset push-buttons and a series of micro-switches to regulated the threshold of trip.
It’s available a changeover contact relay to use the low insulation signalling in a remote panel.
OPTIONS
Standard version 230 Vac, option version 115 Vac
INSTALLATION
The installation must be carried out by qualified and authorized personnel and in absence of voltage. Make sure that
the instrument is O.K. and it has not suffered any damage during transport. Make sure that the voltage supply are
compatible with the operating voltage of instrument.
The device is a 3 modules (17.5mm) DIN version with snap on 35mm DIN rail. It has a sealable transparent frontal
protection cover.
The green LED ON will bright after the connections are set and the instrument is power on.
DESCRIPTION
1. green LED ON
signalling of the instrument working
2. red LED TRIP
signalling of trip for low insulation
3. TEST button to test the instrument functionality
4. RESET button to cancel the trip signalling (manual reset)
5. micro-switches to select the threshold of trip
MICRO-SWITCHES SETTING
The frontal micro-switches allow to set the threshold of trip between 10 and 150 kΩas it’s showed in the following
figure:
10
30
50
100 150
10
30
50
100 150
10
30
50
100 150
10
30
50
100 150
10
30
50
100 150
1 2 3 4 5 6
10 11 127 8 9
41
5
3
2
TEST
RESET
10
30
50
100 150
RI -R38
INSULATION
MONITOR
kΩ
ON
TR IP

RI-R38 instruction manual IM810-U v0.3 pag. 2 / 4
WIRING CONNECTION
1 2 3 4 5 6 7 8 9
PE
10 11 12
AUX1
CARICO
L1
N
OUT-NO OUT-NC OUT-C AUX2 VC RESET
Vaux
PE
L2
L3
insulation monitor
RI-R38
1 2 3 4 5
AUX1
L
N
AUX2 VC
Vaux
L1
L2
L3
1 2 3 4 5
AUX1 AUX2 VC
Vaux
PE
10 11 12
RESET
L
N
RESET
Vaux:
220-240Vca
opzionale:
100-130Vca
Max 400V L-N
Max 400V L-N Max 760V L-L

RI-R38 instruction manual IM810-U v0.3 pag. 3 / 4
LEGEND
Auxiliary power supply
Terminals 1-3
The auxiliary power supply could be the same of the network to control.
Insulation control
Terminals 5-11
The two terminals must be connected between the line under control and the earth of measure reference.
The terminal 5 must be connected to the neutral conductor of the single-phase or the three-phase line of the line to
control. If the three-phase network is at three wires, the terminal must be connected to a phase.
The maximum voltage required between these terminals is 440V and for this reason it’s possible to put the
insulation controller on single-phase line or on three-phase line with 3 wires without neutral up to 440V and with 4
wires with neutral up to 760V.
Relay output connections
Terminals 7-8-9
To remote signalling by relays with changeover contact max 5A 250V on resistive load.
Automatic or remote RESET connection
terminal 12
Connecting the terminal 12 to the 11 (ground) it’s possible to have a manual RESET functioning (using the push-
button on the frontal of the instrument). Without the connection on the terminal 12 the instrument will function with
automatic RESET when the low insulation stops.
It’s possible to connect an external N.C. contact push-button between the monitoring device and the ground.
FUNCTIONALITY
In normal condition, with insulation value higher than the set threshold, the instrument has the green LED on.
Pressing the TEST button the TRIP LED of alarm signalling and the output relay will be activated.
Depending of the connection the RESET will be automatic when the TEST button is reIeased or using a remote
button or manual using the RESET button on the front panel.
If there is a low insulation on the line (resistance value under the set threshold) will be activated the TRIP signalling
and the output relay. When the insulation on the line will come back higher than the set threshold, the trip signalling
will disappear.

RI-R38 instruction manual IM810-U v0.3 pag. 4 / 4
DIMENSIONS
Snap on DIN rail 35mm
(DIN 50022)
3 modules 17,5 mm
TECNICAL FEATURES
Auxiliary voltage supply 230V 50-60Hz ± 20% or 110V 50-60Hz ± 20%
Maximum consumption 3 VA
Network to control 24 ÷ 440Vca +10% (760V on three-phase line with neutral)
Measure voltage Max 24V
Measure current Max 0,5 mA
Internal impedance 100 kohm
Threshold tripping Settable 10 ÷ 150 kohm (4 level with micro-switches)
Tripping delay About 1 second
Signalling and button Led ON, led TRIP; TEST and RESET button
Output Relay changeover contact NA-C-NC max 5A 250Vca
Working and storing temperature -10 ÷ 60°C / -20 ÷ 70°C
Relative humidity ≤95 %
Insulation test 3 kV 60 sec. / 4 kV imp. 1,2/50µs
Mounting position Any
Wiring type Screw terminals / cross section cables 4 mm2
Protection degree Frontal with cover: IP 40 – Enclosure: IP 20
Mounting according DIN 50022 Snap on DIN rail 35mm / 3 modules 17,5 mm
Weight About 300 g
Standards
Safety CEI-EN 61010-1
Product CEI-EN 61557-8
Electromagnetic compatibility CEI-EN 61326-1
For application not described in this manual it’s better to see specific document or to contact the technical service.
58
44
45
65
52,5
85,5
kΩ