Communications & Management
Display type	LCD display
Information displayed	Resistance value; Capacitance value; Evolution of resistance in graph
User language	Italian; French; German; Chinese; Portuguese; Russian; Spanish; English
Local signalling	Green indicator light: satisfactory insulation resistance; White indicator light: below prevention threshold; Red indicator light: wiring or internal fault; Yellow indicator light: insulation fault; Yellow flashing indicator light: communication
Signal contacts composition	2 C/O standard or fail-safe
Signalling circuit voltage	250 V - AC at 3 A; 48 V - DC at 1 A
Communication port protocol	Modbus RS485
Communication of data	HMI: test reports; Dry contact: test reports
Fault event log	Alarm logs; Time stamping; 30 events
Complementary
Alarm threshold setting	Pre-alarm: 1 kOhm...1 MOhm; Alarm: 40 Ohm...500 kOhm
Type of measurement	Network insulation resistance, range: 10 Ohm...10 MOhm, accuracy: +/- 1 %; Earth leakage capacitance, range: 0.01...500 µF, accuracy: +/- 5 %
Configurable filtering time	4 s; 40 s; 400 s
Response time	0.8 s 1/5th of set filtering time; 8 s 1/5th of set filtering time; 80 s 1/5th of set filtering time
Time delay range	0...120 min for signalling circuit; 0...120 min for alarm
Power quality analysis	Transient capture
Input type	Contact for injection inhibition Dry contact; Contact for injection inhibition Modbus
Operating mode	Control; Power
Self-test	Manual; Auto test at start and every 5h
Overvoltage category	III 300 V; II 600 V
IP degree of protection	Case: IP20; Front face: IP54
Material	Thermoplastic
Contractual warranty
Warranty (in months)	18
Logistical informations
Country of origin	IN
Main
Range	Vigilohm
Device short name	IM400
Product or component type	Insulation monitoring device
Type of IMD	AC/DC IMD
Earthing system	IT; HRG
Application	Marine and offshore; Industry; Infrastructure; Power generation; Port, airport, railway
Network size	Large
Electrical circuit type	Power circuit; Control circuit
Network capacitance	Very capacitive
Type of network	1P + N; 3P; 3P + N
Network rated voltage	0…480 V - AC at 45...440 Hz (device connected to phase) ; 0…830 V - AC at 45...440 Hz (device connected to neutral) ; 0…480 V - DC
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	14.000 cm
Package 1 Width	17.500 cm
Package 1 Length	21.200 cm
Package 1 Weight	956.000 g
Unit Type of Package 2	S03
Number of Units in Package 2	4
Package 2 Height	30.000 cm
Package 2 Width	30.000 cm
Package 2 Length	40.000 cm
Package 2 Weight	4.530 kg
Unit Type of Package 3	P06
Number of Units in Package 3	32
Package 3 Height	75.000 cm
Package 3 Width	60.000 cm
Package 3 Length	80.000 cm
Package 3 Weight	43.500 kg
Physical
Type of installation	Indoor
Relative humidity	0…92 %
Ambient air temperature for operation	-25…55 °C
Ambient air temperature for storage	-40…70 °C
Pollution degree	2
Mounting mode	Flush-mounted (panel)
Mounting position	Horizontal
Connections - terminals	Removable screw terminal block 0.2…2.5 mm²
Net weight	0.645 kg
Cut-out dimensions	112 x 148 mm
Height	123 mm
Width	159 mm
Depth	90 mm
Power Requirements
[Us] rated supply voltage	100...440 V AC 50/60/400 Hz tolerance: +/- 15 %; 100...440 V DC tolerance: +/- 15 %
Power consumption in VA	25 VA
Power consumption in W	10 W
Overcurrent protection	1 A
Standards
Standards	IEC 60364-4-41; IEC 61010-1; IEC 61557-8; UL 61010-1; IEC 61326-2-4; EN/IEC 61508 level SIL2
Product certifications	DNV; RMRS; CE; ABS; EAC; CSA; cULus; UL; EU-RO MR TA; RCM
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; Long-term storage class 1K22 conforming to IEC 60721-3-1; Transport class 2K11 conforming to IEC 60721-3-2; Stationary use at weather protected locations class 3K24 conforming to IEC 60721-3-3
Mechanical robustness	Long-term storage class 1M11 conforming to IEC 60721-3-1; Transport class 2M4 conforming to IEC 60721-3-2; Stationary use class 3M11 conforming to IEC 60721-3-3
Supported Hardware
Product compatibility	Automatic fault locator

This device belongs to the Vigilohm range designed for the monitoring of unearthed power supplies (IT systems) in accordance with installation and product standards. According to the standards, it is recommended to equip your systems with insulation monitoring devices (IMD). This device is intended for the monitoring of large and disturbed AC, DC and ACDC systems. It measures the network insulation resistance by injecting a low frequency alternating current between the network and earth. The configuration is set depending on the installation. The settings are made on the front of the device, from the HMI screen or from the communication port. The settings refer to the network type, the alarm and pre-alarm thresholds, the alarm delay from 0 to 7200 seconds and others are available. It monitors networks up to 830VAC when connected to the neutral, 480V when connected to the line and 480VDC, with up to 500microfarad. The black and white screen can display insulation resistance from 10 ohms to 10 megohms, capacitance and temporary faults. Autotest starts automatically every 5 hours and when required. If the insulation resistance of the system falls below the set threshold, i.e. there is an earth fault, an alarm is triggered via the IMD output relay. Once no more faults are detected, the alarm is cleared and the alarm relay returns to normal. The device can be powered from a 110VAC to 440VAC source or a 110VDC to 440VDC source, all with a tolerance of plus or minus 15%. This product is flush mounted, e.g. in a control cabinet door. Front protection class is IP5, rear protection class IP20 and overvoltage 300V category III. The monitoring device is equipped with an RS485 communication interface with Modbus protocol.