BENDERRCMA474 Bender

Description

Product name：BENDERRCMA474 Bender Power module

Product details:

The AGH150W-4 coupling device is designed to extend the nomi-nal
voltage range of the A-SOMETERIRDH265-4/RDH365-4/IRDH1065B-4
series to DC 0…1760 V. The coupling device isconnected to the system
being monitored by two poles and con-nected to the terminal AK of
the A-ISOMETER by means of theterminal AK160.

This device meets or exceeds the requirements of NEC 250.21(B) and CEC 10-106(2) for
ground detectors in ungrounded AC systems, as well as the upcoming 2014 requirement
of NEC 250.167(A) for ungrounded DC systems.
The IRDH275 monitors for ground faults in ungrounded single-phase AC, three-phase AC,
and DC systems by monitoring the system’s insulation resistance. It may be connected to
systems of up to 793 VAC / 650 VDC. Voltage coupler accessories extend this range. The
AMP Plus measuring principle utilized by the IRDH275 meets the requirements of modern
power systems, including pure DC systems, systems with rectifiers, and systems with
variable frequency drives (VFDs). In systems with high leakage capacitances, the IRDH275
automatically adapts itself to ensure an accurate reading.
The IRDH275 features a digital display showing the system’s insulation resistance’in
real-time. All settings are changed via the device’s built-in menu. The IRDH275 utilizes an
external supply voltage for power, which allows deenergized systems to also be monitored.

The currently measured insulation resistance is indicated on the LC display. In this way
any changes, for example when circuits are connected to the system, can be recognised
easily. When the value falls below the preset response values, the response delay “ton”
starts. Once the response delay “ton” has elapsed, the alarm relays “K1/K2” switch and the
alarm LEDs “AL1/AL2” light up. Two separately adjustable response values/alarm relays
allow a distinction to be made between prewarning and alarm. If the insulation resistance
exceeds the release value (response value plus hysteresis), the alarm relays return to their
initial position. Insulation faults are distinguished according to AC and DC faults (indication ±).
In the event of insulation faults on the plus or minus conductor, the corresponding +/- symbol is
activated on the display. If the fault memory is enabled, the alarm relays remain in the
alarm state until the reset button is pressed or until the supply voltage is switched off.
The device function can be tested using the test button. The parameterisation of the device
can be carried out via the LC display or the function keys integrated in the front plate.

The AC/DC sensitive residual current monitor RCMA420 is designed for monitoring earthed
power supply systems (TN and TT systems) where smooth DC fault currents or residual
currents continuously greater than zero may occur. These are in particular loads containing
six-pulse rectifiers or one way rectifiers with smoothing, such as converters, battery chargers,
construction site equipment with frequency-controlled drives. Currents in single conductors
can be monitored too.
The prewarning stage (50…100 % of the set response value IΔn2) allow to distinguish between
prewarning and alarm. Since the values are measured with measuring current transformers,
the device is nearly independent of the load current and the nominal voltage of the system.

Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!

We have the same series of models in stock.  If you don’t find the model you need, please contact us and we will provide you with an official quotation！

Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service

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All other brand or product names mentioned in this document may be trademarks or registered trademarks of their respective holders.