Schneider Insulation Monitoring Device

Schneider Insulation Monitoring Device IM20

This Schneider Insulation Monitoring Device  IM20 belongs to the Vigilohm range designed to monitor ungrounded/IT electrical networks, in accordance to installation and products standards. According to standards, it is recommanded to equip your systems with Insulation Monitoring Devices (IMD). This device is dedicated to monitoring AC, DC and ACDC systems of medium size, with limited disturbances.

It mesures the system insulation resistance by injecting a low frequency AC current between the network and ground. Configuration will be set depending on the installation. Settings are available on the front of the device, through the HMI screen. Settings are alarm thresholds from 0,5 kilohms to 500 kilohms, and alarm delay from 0 to 7200 secondes.

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Specification

Complementary
Network rated voltage 0…600 V – AC at 45…440 Hz (device connected to neutral)
0…480 V – AC at 45…440 Hz (device connected to phase)
0…345 V – DC
Data recording Alarm logs
Type of measurement Network insulation resistance – measurement range: 0.1 kOhm…10 MOhm
Earth leakage capacitance – measurement range: 0.1…40 µF
History of alarms
Local signalling Green indicator light: satisfactory insulation resistance
White indicator light: below prevention threshold
Orange indicator light: below fault threshold
Orange flashing indicator light: transient fault
Threshold setting Prevent: 1 kOhm…1 MOhm
Fault: 0.5…500 kOhm
Time delay range 0…5 min for signalling circuit
Response time <= 5 s
auxiliary supply voltage 110…415 V AC 45…440 Hz +/- 15 %
125…250 V DC +/- 15 %
Power consumption in VA 12 VA
Measurement voltage 75 V
Measurement current 0…0.4 mA
internal impedance 110 kOhm – AC at 0.1…440 Hz
Test function Manual
Self test
output contact 1 C/O standard or fail-safe
breaking capacity 250 V – AC at 6 A
12…24 V – DC at 6 A
Input function Injection inhibition: 24 V DC 5 mA
Communication port protocol Modbus
Communication port support RS485
Display type Digital display
Mounting mode Clip-on
Flush-mounted
Mounting support DIN rail
Panel
Connections – terminals Removable screw terminal block0.2…2.5 mm²
Material Thermoplastic
Overvoltage category III
net weight 0.25 kg
Height 110 mm
Width 96 mm
Depth 59 mm
Environment
Dielectric strength 4000 V – AC
5500 V – DC
IP degree of protection Front face: IP52
Environmental characteristic Exposure to damp heat not in service conforming to IEC 60068-2-30
Exposure to damp heat in service conforming to IEC 60068-2-56
Salt mist conforming to IEC 60068-2-52
Operating altitude <= 3000 m
Pollution degree 2
Type of installation Indoor
Standards IEC 60364-4-41
IEC 61010-1
IEC 61557-8
IEC 61326-2-4
Product certifications BV
DNV
CE
EAC
RMRS
Ambient air temperature for operation -25…55 °C
ambient air temperature for storage -40…70 °C

 

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