Description

IRDH275B-435 is an insulation monitor produced by BENDER.The following is a detailed introduction to it:

1.Main functions

The IRDH275B-435 insulation monitor is mainly used to monitor the insulation resistance of ungrounded main circuits(IT systems)to ensure that they operate within a safe range.It is particularly suitable for AC and AC/DC main circuits,including AC/DC main circuits with directly connected DC elements,such as rectifiers,converters and thyristor-controlled DC drives,as well as UPS systems,battery systems,etc.

BENDER IRDH275B-435

2.Technical features

Innovative technology:The innovative A-ISOMETERs technology is used to make insulation resistance measurements more accurate.

Easy to install:Its panel-mounted housing is easy to install on the fascia of the distribution board,and users can easily obtain comprehensive and easy-to-understand information through a plain text display.

Safety protection:The terminal cover,anti-electric shock protection,wiring terminals and other designs provide additional protection and enhance the safety of the equipment.

Widely applicable:It can detect ground faults in ungrounded AC/DC systems with a voltage range of up to 0793VAC and 0650VDC.

Adjustable Response Value:With two individually adjustable insulation resistance response valuesranging from 1kΩto 10MΩ,it is suitable for pure AC,pure DC and hybrid AC/DC systems,including those with variable frequency drives(VFD).

Real-time Display:It can display readings in real time,provides an easy-to-use on-board menu for managing settings,and has an automatic self-test function.

External Test and Reset:Built-in test and reset buttons facilitate users to perform external test and reset operations.

Latching or non-latching operation:With latching or non-latching operation options,it is equipped with two SPDT contact outputs,usually powered or normally de-energized.

BENDER IRDH275B-435

III.Additional functions(IRDH275B version)

History memory:History memory with real-time clock is used to store all alarm information with date and time stamp.

Electrically isolated RS-485 interface:For connection with other devices.

Isometer disconnect relay:For connecting multiple Isometer®operations.

Equidistant disconnect:The relay and control input F1/F2 integrated in the IRDH275B version ensure that only one ISOMETER®is active at a time.

IV.Application Examples

In actual applications,the IRDH275B-435 insulation monitor can continuously monitor the functions of equipment,systems and ground connections,provide fault information,and allow users to test and reset operations through the reset button.At the same time,additional information such as existing system leakage capacitance or equipment settings can also be displayed for user reference.

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