Overvoltage/undervoltage protection devices (multifunction protection devices)

Single-phase over/under voltage protector UZM-51MD IN DEVELOPING

Устройство защиты УЗМ-51МД

  • Protection from arcing and dangerous spark in the wiring
  • Two-threshold over/under voltage protection
  • Built-in protection from impulse spikes line voltage (varistor)
  • Nominal/maximum switching current is 63A/80A at 250V
  • Operates over a wide supply voltage range - 0...440V

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MPD-50М voltage-check relayMPD-51М voltage-check relay

  • Maximum switching current is 63A/250V (14kW)
  • Single-phase over/under voltage protector
  • Protection of single-phase loads from surges, prolonged over-voltage and voltage dips resulting from accidents on the line (broken zero overlaps wires, etc.)
  • Built-in varistor protection from impulse disturbances mains voltage (switching noise, remote lightning, etc.)
  • Discrete adjustment of thresholds
  • Reclosure delay is 10 seconds or 6 minutes (user-defined)
  • Operating temperature: UHL4 (-250С to +550С) or UHL2 (-400С to +550С)

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Устройство защиты многофункциональное УЗМ-16
  • Rated load current is 16А
  • Synchronized control of the relay - the closure of relay contacts is carried out by the transition mains voltage zero crossing
  • Single-phase over/under voltage protector
  • Protection of single-phase loads from surges, prolonged over-voltage and voltage dips resulting from accidents on the line (broken zero overlaps wires, etc.)
  • Built-in varistor protection from impulse disturbances mains voltage (switching noise, remote lightning, etc.)
  • Discrete adjustment of thresholds
  • Reclosure delay is 10 seconds or 6 minutes (user-defined)
  • Operating temperature: UHL4 (-250С to +550С) or UHL2 (-400С to +550С)

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Устройство защиты УЗМ-3-63К
  • Have the terminal for remote control
  • Three-phase two-threshold overvoltage protector (trip delay): >265V/0,2s; >300V/20ms
  • Three-phase two-threshold undervoltage protector (trip delay): <170V/10s; <1340V/100ms
  • Monitoring phase failure and phase sequence
  • The maximum switching current of 63A per phase (14,5kW at 3)
  • Decade switch of thresholds
  • Reclosure delay (0,1 to 10seconds) (continuous adjustment)
  • Frequency control from 45 to 55Hz
  • Operating temperature: UHL4 (-250С to +550С) or UHL2 (-400С to +550С)
  • Built-in varistor protection from impulse perturbation net
  • Switchable delay reclosing from 2s to 8min
  • Operate time when the voltage jumps - less than 30ms

 

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