SIM-Q - The Selectable Insulation Monitor - Wednesday, January 16, 2008

• Insulation monitoring of AC networks of up to 690V AC
• Ideal for applications with frequency converters
• Easy testing during vettings/inspections
• Immune to DC voltages up to 1,000V
• Classic fault-finding properties

Ideal for applications with frequency converters

Based on our patent pending technology, the SIM-Q combines the accuracy of digital insulation monitoring principles with the speed of traditional ohmic measuring. We have utilised the experience gained from having manufactured insulation monitors for many years to invent an insulation monitor that eliminates the shortcomings of traditional designs; sensitivity to uneven stray capacitance, risk of damage caused by high network DC voltages (imposed by faulty frequency converters), etc.

Application

The SIM-Q is used for supervision of the insulation resistance between an insulated  voltage distribution network and an earth/safety cable. The monitor is applicable with single phase and 3-phase networks with/without neutral for voltages up to 690V AC.

Alarm relay

The SIM-Q is equipped with a relay output with adjustable set point. By means of a built-in switch, the relay can be configured to either NE (normally energised) or ND (normally deenergised).

Automatic offset adjustment

The SIM-Q performs an automatic offset adjustment in order to eliminate the possible effects of uneven stray capacitance and DC voltages imposed on the network by faulty frequency converters. When the offset adjustment has been performed, a traditional insulation measurement is carried out by imposing a DC voltage on the network.

Leakage capacitance up to 500 ìF.

more information available here.