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The AC and pulsed DC sensitive residual current monitor RCMA420-D (Type A) from Bender is designed for fault and residual current monitoring in earthed power supply systems (TN and TT systems) where an alarm is to be activated in the event of a fault, but disconnection must be prevented. In addition, the device can be used to monitor the current in single conductors, such as PE conductors, N-PE connections and PE-PAS connections. Due to the use of measuring current transformers, the device is nearly independent of the load current and the nominal voltage of the system.
The response value can be adjusted in the range of 10...500 mA. When the prewarning level is reached (50% to 100% of the response value), an alarm message is generated. This information achieved sufficiently well in advance can avoid unexpected disconnections and costly downtimes.
Typical application fields are: Residual current monitoring in earthed two, three or four conductor systems; construction site equipment; current monitoring of single conductors de-energized under normal conditions; socket-outlet circuits for devices which are operated unattended for a long time and which may not fail; alarm systems; safety devices. |
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Reliable fire and system protection:
Differential current monitor type B with pre-warning function, measuring range from10 mA to 3 A.
Early detection of insulation faults can prevent failure of complete electrical plants. Fault current monitoring by measuring differential current is the ideal method for this application. The monitoring requirement for today’s supply systems get more and more complex. Electronic control of drives, switched power supplies and chargers or fluorescent lamps with electronic ballast units can create DC fault currents in the case of earth faults. Standard differential current monitors do not detect this type of faults.
Type B differential current monitor DOLD varimeter IP5883 detects DC and AC fault currents in grounded voltage systems. The measurement is done by an external current transformer.
Contrary to RCD units, IP5883 does not disconnect the mains immediately but signals the fault. The unit includes an easy to read LED bar indicating the fault current and LEDs for operation, pre-alarm and alarm. The measuring range is 10 mA to 3 A. Additional features: broken wire detection, adjustable pre-alarm and test function. This varimeter offers advanced information for specific and cost effective maintenance BEFORE the plant breaks down. |
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Features:
- Rugged design for handheld or bench top use.
- Large 3-1/2 digit LCD built into adjustable "flip-up" cover.
- precision source for calibrating process devices and measuring DC process signals from 0 to 24 mA and 0 to 10 V
- High accuracy to 0.075 % and drives current loads to 350 ohm. |
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AC/DC METER FOR GENERATOR
Detailed Spec.:
*RC-96 96X96mm AC Ammeter,AC Voltmeter,DC Ammeter,DC voltmeter,HZ,COSØ,Power meter(kw,w,kvar,var)
*RC-72 72X72mm AC Ammeter,AC Voltmeter,DC Ammeter,DC voltmeter,HZ,COSØ,Power meter(kw,w,kvar,var)
*RC-96 96X96mm Maximum Demands Ammeter
*RC-72 72X72mm Maximum Demands Ammeter
*RC-96 96X96mm Power Meter
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Current measuring devices
