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The AI898 series Insulation Monitor Relay suitable for DC-voltage systems. It is programmable for manual reset (bridge LT1-LT2) and automatic reset (without bridge). It is suitable monitoring of insulation resistance in ungrounded DC-voltage systems applications.
• Fixed response value
• Closed-circuit operation
• Test button to check the function of the device
• LED indicators
• External reset button on LT1-LT2
• 1 Changeover contact
• According to VDE 0413
Symmetric ground faults (same resistance between L+ - PE and L- - PE) will not be detected because of the measuring principle. In practice this is of no importance.

Было найдено: 19.04.2017