The working principle of the isolation monitor for IT systems in medical use rooms, as well as hospital and ambulatory clinic, is based on applying a dc voltage or a codified signal, between the secondary of the isolation transformer and the equipotential node of the installation . Borna niroo karan company(Brnika) is the exclusive representative of Contrel on buying , selling, consulting services for automation systems and protective relays including Insulation monitoring Relais (HRI Series) .

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Products
  • Model: HRI-R40 , HRI-R40w
  • Order code: HRI-R40 , HRI-R40w
  • Brand:
  • Country: Italy
  • HRI-R40 could set a large number of programming possibilities with frontal button and 3 digit digital display for visualising measuring and programming parameters. Insulation's resistance monitoring is carried out applying a measure's signalling between isolated network and earth . reducing problems caused by the presence of direct-current components on network (rectifiers), HRI-R4OW version has same fundamental characteristics of previous model but it uses particular measuring technique , Actually presence in network of strong distortions with high harmonic .

  • Model: HRI-R22t
  • Order code: HRI-R22t
  • Brand:
  • Country: Italy
  • The device has similar characteristics of previous model but it's more cheap and it has less functions . There is measuring signalling and it is able to verify temperature of insulation power transformer .

  • Model: HRI-R24
  • Order code: HRI-R24
  • Brand:
  • Country: Italy
  • For monitoring 24 V networks , monitor HRI-R24 is used. This is able to supply insulation's control adjustable by frontal potentio-meter . Outputs are available for remote repeaters panels PR-5 (max 2 panels).

  • Model: RI-R48 , RI-F48 , RI-R48N
  • Order code: RI-R48 , RI-F48 , RI-R48N
  • Brand:
  • Country: Italy
  • The devices allow the insulation monitoring to earth of electric networks in alternate and direct current till 48 V isolated (IT systems) . Devices have on frontal panel signal for activity ON, for tripping TRIP (low insulation), a test bottom, a reset bottom and a potentiometer (or micro switches) for setting the threshold of tripping (only for versions with adjustable threshold) .

  • Model: RI-R11 , RI-R11D
  • Order code: RI-R11 , RI-R11D
  • Brand:
  • Country: Italy
  • The devices allow permanent monitoring of insulation of electrical networks in direct-current current isolated on earth (IT networks) . These devices have two trip thresholds, which are adjustable by frontal micro switches . On the front, there are TEST and RESET buttons; test could be activated locally or by an external button; push button could be set manually or automatically, either with local button or with external push button .

  • Model: PR5
  • Order code: PR5
  • Brand:
  • Country: Italy
  • Panels of remote signalling PR allow to give alarm signalling of insulation's monitoring devices HRI . They have also an acoustic signaller incorporated, a test button and a button for stopping acoustic signal . Maximum of repeater boards associable with HRI device is 2 . the special features of this device are : - green LED of signalling active device (voltage presence) - red LED of sigalling overload or overtemperature - yellow LED of sigalling FAILURE (low insulation) - test button for testing functionality of HRI system and PR board - internal buzzer

  • Model: EML-12S
  • Order code: EML-12S
  • Brand:
  • Country: Italy
  • Serial remote concentrator is a device which allow remote monitoring of parameters originated from insulation's supervisors for medical use rooms HRI-R40 and HRI-R4OW with serial output RS485. Devices HRI-R40 or HRI-R40W are connected to EML-12S concentrator by serial output RS485 . Maximum 12 HRI devices could be connected .

  • Model: KRM16x
  • Order code: KRM16x
  • Brand:
  • Country: Norway
  • The digitally controlled KRM16xE uses the Megacon "IDV" insulation measuring principle and monitors insulation level between a non-grounded (IT) mains and its protective earth.

  • Model: KRM169E
  • Order code: KRM169E
  • Brand:
  • Country: Norway
  • The digitally controlled low cost KRM169E is self powered and uses the Megacon “SEV” insulation measuring principle to measure the insulation in live non-grounded DC systems.

  • Model: KRM169D
  • Order code: KRM169D
  • Brand:
  • Country: Norway
  • KRM169D measures the insulation, directly in kohms, of non-earthed DC systems.

  • Model: KRM161-DC
  • Order code: KRM161-DC
  • Brand:
  • Country: Norway
  • KRM161-DC monitors resultant insulation level between a non-grounded non-live DC network and its protective earth.

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