An extensive range of electronic control products to providing continuous monitoring and protection of any electrical parameter. When the monitored parameter deviates from the desired set trip limit, the relay will operate to prevent damage to power asset. This versatile ranges features a host of DIN rail protectors offering numerous trip functions for single and three phase power systems

AC CURRENT

AC current protectors provide a continuous surveillance of monitored circuits and offer user adjustable trip points (set points) with time delay settings. When the current moves outside the set point limit for longer than the time delay, the relay will operate providing an alarm control or tripping signal.

Basic Parameters
  • Universal auxiliary supply 24-240V AC/DC galvanically isolated from monitored current circuit
  • Pre-set differential (hysteresis) 1%
  • Trip level adjustment between 40-120% (In)
  • Available with 1A or 5A nominal inputs of (In)
  • Power on LED (green)
Under Current - PAU
  • Single-phase
  • Continuously monitors to provide under current protection (set level Imin)
  • Adjustable time delay
  • 1 module version
Over Current - PAO
  • Single-phase
  • Continuously monitors to provide over current protection (set level Imax)
  • Adjustable time delay
  • 1 module version
Under and Over Current - PAD
  • Single-phase
  • Monitors decrease of current under a set level Imin and simultaneously an over range of current above a set level Imax
  • Independently adjustable delay on both over and under set points
  • Two output relays
  • Three module version
Under or Over Current - PAP/V
  • Three-phase, three/four-wire
  • Continuously monitors to provide under or over protection (set level In)
  • Monitors three-phase current
  • Selectable under or over protection
  • Six module version

AC VOLTAGE

When the measured voltages moves outside the set point limit for longer than the time delay, the relay will operate giving an alarm control or tripping signal.

The Protector can be used for under and over voltage detection, start standby generators, operation of mains failure units and switching standby suppliers. An illuminated red LED indicates a fault condition. The three-phase, three or four-wire models with protect each phase independently.

Basic Parameters
  • Available with three voltage ranges 100-120V, 173-240V & 380-480V (Un)
  • Trip level adjustment between 75-100% (Un) Under
  • Trip level adjustment between 100-125% (Un) Over
  • Non-phase sequence sensitive
  • Adjustable differential (hysteresis) 1-15%
  • Adjustable time delay 0.5-10s (t)
  • Power ON LED (green)
  • Optional auxiliary voltage
Under Voltage
  • Continuously monitors to provide under voltage protection (set level Umin)
  • One and three module versions
Over Voltage
  • Continuously monitors to provide over voltage protection (set level Umax)
  • One and three module versions
Under and Over Voltage
  • Continuously monitors to provide under and over protection (set level Umin and Umax)
  • Two output relays
  • Three module version
AC Voltage Auxiliary
  • Auxiliary option is available on all models.

    Example:

  • PVV/X-380/480-AUX includes 24V/240V AC/DC auxiliary supply
  • PVV/X-380/480 self-powered

AC Voltage Suppressed Zero – Auxiliary or Self Powered

Single or three-phase models offering ‘expanded scale’ measurements at critical voltage levels, indicating small changes within a large voltage span. Average sensing and calibrated to indicate the RMS value of a sine wave less than 1% distortion. Isolation is provided between input, output and auxiliary

FREQUENCY

The Frequency protector trip relay provides a continuous surveillance of the monitored circuits and offers user adjustable trip points (set points) with time delay and differential (hysteresis) settings. When the frequency moves outside the set point limits for longer than the time delay, the relay will operate giving an alarm control or tripping signal. Since speed is proportional to frequency, this protector can be used to monitor under and over speed to protect mains, computers supplies and standby supplies.

Basic Parameters
  • Adjustable rated frequency, 50, 60 or 400Hz
  • Trip level adjustment between 80-120% (Fn) Under
  • Trip level adjustment between 80-120% (Fn) Over
  • Adjustable differential (hysteresis) 0.5-5%
  • Adjustable time delay 0.5-10s (t)
  • Power on LED (green)
Under and Over Frequency
  • Continuously monitors frequency to provide under and over frequency protection (Set level Fmin and Fmax)
  • Three module version
  • 2 output relays
  • Single phase
Under and Over Frequency - PHD

The Frequency protector set point adjustment range is centred around the nominal system frequency of 50, 60 or 400Hz. The adjustable differential setting can be used to reduce nuisance tripping if the measured signal is noisy or unstable. Under normal conditions, with the supply frequency close to the nominal set point, both red LEDs are off with the Under relay energised and the Over relay de-energised.

Should the supply fall below the opening threshold, both relays will de-energise and both red LEDs will flash slowly to indicate insufficient supply voltage.

Under protection

Should the monitored frequency falls below the set point level, Fmin, the protector trips and the red LED illuminates to indicate the fault condition. During the time delay period the red LED will flash for the set time, (t), before the relay de-energises (output relay-contact terminals 15, 16 & 18). The relay automatically resets once the monitored frequency rises above the set point level Fmin plus the differential (between 0.5-5%). Causing the red LED to extinguish and the relay to make without time delay.

Over protection

Should the monitored frequency exceed the set point level Fmax, the protector trip and the red LED illuminates to indicate the fault condition. During the time delay period the red LED will flash for the set time (t) before the relay energises (output relay contacts terminals 25, 26 & 28). The relay automatically resets once the monitored frequency falls below the set point level Fmax plus the differential (between 0.5-5%).

Causing the red LED to extinguish and the relay to release without time delay. Note: Red LED indicates fault condition, not relay status