APPLIED 0100-77040 Cylinder pressure monitor

Product description The ISOMETER® of the IRDH375(B) series is designed to monitor the insulation resistance of unearthed main circuits (IT systems) AC, AC/DC 0…793 V resp. DC 0…650 V. The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. In these systems often high leakage capacitances against earth occur due to interference suppression measures. The IRDH375(B) automatically adapts itself to the existing system conditions. In combination with a coupling device, the devices can also be used for higher voltages. An external supply voltage allows de-energised systems to be monitored too.

Function 

When the insulation resistance between the system conductors and earth falls below the set response value, the alarm relays switch and the alarm LEDs light up. Two separately adjustable alarm relays allow to distinguish between prewarning and alarm. The measured value is indicated on the LC display or an externally connectable measuring instrument. In this way any changes, for example when circuits are connected to the system, can be recognised easily. The fault message can be stored. The fault memory can be reset by pressing the reset button. By pressing the test button, the function of the device as well as the connections to system and earth can be tested. Pressing the Info button provides additional information, such as the existing system leakage capacitance or device settings. The function of the device and the earth connections are monitored. When a fault occurs, the system fault relay switches and the alarm LED “system fault” lights up. The parameterisation of the device can be carried out via the LC display or the function buttons integrated in the front plate.

Device features

• Insulation monitoring for unearthed AC, AC/DC systems 0…793 V, DC 0…650 V 

• Nominal voltage extendable via coupling device 

• Two separately adjustable response values 1 kΩ…10 MΩ 

• AMPPlus measurement method 

• Automatic adaptation to the system leakage capacitance 

• Info button to display device settings and the system leakage capacitance 

• Continuous self monitoring, with automatic alarm message

                                                                        

Application industry

The products can be used in the following industries: power plant, paper making, steel, mining, rubber, water supply, cement, chemical industry, glass, printing

Textile, machinery, plastics, coatings, medicine, hospitals, food, hotels, scientific research institutions

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