Control Relay
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R.F.Q
The differential DC current relay is designed to monitor IT systems for insulation deterioration. The DDCA is able to selectively indicate faults in branched systems. In addition to this it shows if the fault is related to the positive or the negative wire for easy maintenance. Used with only one wire through the sensing core, it can monitor a circuit for connectivity and function. If the DC current drops below the set value, the relay will trip. This is another key feature as the DDCA allows, up to the cable capacity, AC and DC Amps to flow under normal conditions without having the usual voltage drop and heat from a shunt resistor
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詳細
FEATURES:
• Early warning for Insulation deterioration and Earth leakage
• Minimum current detection
• 6 Ranges from 5 to 200mA selected by DIP switches
• Wide DC supply range from 18 to 340 V
• Directional 12 ± 8mA output and LED indication for supervision and easy trouble shooting
• External current transformer Ø50mm or Ø90mm
• Extremely compact and µ metal screened trans former for high accuracy and noise immunity
• Time delay - on and off - individually adjustable
• Relay function can be inverted
• Latch function can be selected
• LEDs indicate the status of the relay, latch and timing function
• Test and Reset switch
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