Comparing relays NR and NRT

to analyze voltage levels

nr

Description

Comparing relays NR and NRT are designated to analyze voltage levels in DC systems with a backup battery. They work in two basic modes:

  • disconnector that responds the voltage drops under a preset level
  • diode-element (diode block that stabilizes the voltage on the load. In other words it lowers the voltage on the load to a tolerable level while the voltage of a battery can oscillate in a certain range) regulator, that monitors exceeding of the voltage over a preset level

List of the typical applications:unr zapoj

  • disconnector - external DC contactor unlinks an appliance (the load) and a battery when the battery is deeply discharged, and links them again when the battery nominal voltage has been restored back
  • signalling of the battery voltage drops - information is conveyed via a potential-free contact to a superior system, and it is cancelled when the nominal voltage of the battery has been restored
  • signalling of exceeding of the maximum voltage - information is again commited to a superior system via a potential-free contact, and it is cancelled when the voltage has dropped under the preset level
  • comparing relay controls one grade of the diode-element so that it lowers the voltage on the load when the voltage tolerance of the load has been broken

It is possible to activate both acoustic and optical indication for all the above applications. It is possible to configure the NR/NRT relays using jumpers.

Manufactured types of the comparing relays

Comparing relays NR: transistor (for a DC contactor) and an internal relay output

(/DIN = DIN bar mountable)

NR 24V, NR 24V/DIN
NR 48V, NR 48V/DIN
NR 60V, NR 60V/DIN
NR 110V, NR 110V/DIN
NR 220V, NR 220V/DIN

Comparing relays NRT: transistor output

(for a DC contactor) (/DIN = DIN bar mountable)

NRT 24V, NRT 24V/DIN
NRT 48V, NRT 48V/DIN
NRT 60V, NRT 60V/DIN
NRT 110V, NRT 110V/DIN
NRT 220V, NRT 220V/DIN

Features

  • relay or transistor output
  • connection to an external contactor
  • potential-free switchover contact 8A/250VAC
  • external optical (LEDs) signalling
  • low self power consumption
  • DIN bar mountable (optionally)

Application

  • disconnector
  • signalling of the battery voltage drops
  • signalling of exceeding of the maximum voltage
  • comparing relay controls one grade of the diode-element

EPRONA, a.s.

What we offer

  • individual visitation in your company
  • service of our products in the whole Czech republic by our service engineers and service representatives
  • direct sale for retail prices to a private persons and wholesalers as well
  • custom solution and cooperation on your projects
  • our eloxal plant is prepared for your products

Sales department

  • tel.: +420 481 549 174
  • fax: +420 481 549 172
  • mobil: +420 725 552 198
  • email:zalska@eprona.cz

Special request?

Give us a call!

Contact us

Search