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Qualitrol Pressure Control Switch, 141 Series

141 Series Pressure Control Switch

Brand: Qualitrol Company
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Qualitrol Pressure Control Switch, 141 Series Qualitrol Pressure Control Switch, 141 Series Qualitrol Pressure Control Switch, 141 Series
Designed to provide operating control, limit or alarm functions for transformers and load tap changers.

Contacts can be factory set or adjusted as needed. The snap-action switch automatically resets when pressure returns to pre-set conditions.

Pressure and/or vacuum switches can be combined on a common manifold and protected by optional enclosure.

Optional pressure indicators (dial gauges) are available on select models.
Features
  • Reliable alarming for rising or falling pressure
  • Compact design is easy to install
  • Numerous configurations available for many applications
  • Available with cut off valve for field testing of switches
  • Tested and certified to be reliable
  • Reliable snap-action switch resets automatically – no manual reset is required
  • Single pole double throw (SPDT) switches are UL and CSA listed
  • Switches may be applied on systems using steam, air and other non-combustible gases
  • Pressure settings can be factory-set and/or adjustable by equipment manufacturer on select models
  • The high electrical rating of the snap-action switch often saves on the need for expensive relays

Specifications

Brand

Bezel & Lens

  • One Piece Molded Polycarbonate

Bleed Valve

  • 1/4” I.D. Tube Hose Barb

Connection Type

  • Flying Leads
  • Screw Terminals

Dial Case

  • Anodized Aluminum
  • Cold Rolled Steel

Dial Diameter

  • 3.5” (88.9 mm)

Electrical Connectors Type

  • Flying Leads
  • Quick Connects
  • Screw Terminals
  • Sealed-Weatherproof Connector

Enclosure

  • IP55 (NEMA 4) - 141-005

Indication Accuracy

  • ± 2 % of Middle Half of Scale
  • ± 3 % over First & Last Quarter of Scale

Mounting

  • Center Back Vertical Mounting

Number of Switches

  • 2

Pressure Relief Device

  • psi: 5 (kPa: 34.47, bar: 0.3447)

Standard Dial Range

  • psi: -10 to 10

Standard Operating Temperature

  • -29° to 74° C (-20° to 165° F)

Switch Rating

  • 1/2 A at 125 Vdc, Resistive
  • 1/4 A at 250 Vdc, Resistive
  • 15 A at 125, 250, 480 Vac

Switch Type

  • SPDT

Tank Connection

  • 1/4”-18 NPT, 5/16” Compression Fitting

Vibration Resistance

  • Not Affected when Subjected to 60 Hz or Whole Multiples Thereof

Documentation

Data Sheets

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