Brand： BENDER
Model number： IRDH275B-435
Colour：new
Warranty: 12 months
Lead Time：3-day working day
Country of origin: USA Price: Please contact us
Product weight：0.25kg
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
Description:
Description
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.
For a panel mounted version, please refer to the IRDH375.
Function
When the insulation resistance from system to ground falls below the set response value,
the alarm relays switch and the alarm LEDs activate. Two separately adjustable alarmcontacts can be set to a prewarning and main warning alarm. The measured value is indicated on the LCD display or an externally connectable measuring instrument. A latching
setting ("fault memory") allows the device to reset automatically or require a manual reset. An external and internal test/reset can be activated remotely or on the device. A
comprehensive INFO menu displays additional information such as the system's leakage
capacitance.
The IRDH275 continuously monitors the equipment ground connection to ensure proper
operation. The device's easy-to-use onboard menu manages all settings via the detailed
LCD screen.
Additional Features
• History memory with real-time clock to store up to 300 timestamped event records
• Galvanically isolated RS-485 interface (BMS protocol) for data exchange with other
Bender devices and communication systems
• Standby contacts and RS-485 communication for operating multiple ground fault detectors in systems tied together with tiebreakers or interlocks
• Galvanically isolated analog output, 0(4 ) - 20 mA
Use in Interconnected Ungrounded Systems
Only one BENDER insulation monitor may be active when several ungrounded systems
are coupled together via a tiebreaker or other means. The disconnect relays and control
inputs F1/F2 integrated into the IRDH275 guarantee no interference with other BENDER
devices when the system tiebreaker is closed. IRDH275B models feature automatic control via RS-485 with no control inputs necessary.
Measurement Method
The IRDH275 series uses the AMPPlus measuring principle. This measuring principle allows for the precise monitoring of modern power supply
systems, pure DC systems, systems where AC/DC rectification and power conversion may occur, systems with variable frequency drives (VFDs), and systems with high leakage capacitances.
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
Related products:
IRDH275-435
IRDH275-427
IRDH275B-415
