1341204 Potter PS120-2 SPDT Supervisory Pressure Switch for Excess Pressure Systems

Features

• Two switch model
• One or two switch models available
• Independent switch adjustment, no tools needed
• Two 1/2” conduit/cable entrances
• Separate isolated wiring chambers
• Non-corrosive pressure connection
• Non-Conductive Enclosure

Installation

The Potter PS120 Series Supervisory Pressure Actuated Switches are designed primarily to detect an increase and/or decrease from normal system pressure in automatic fire sprinkler systems. Typical applications are: Wet pipe systems with excess pressure, pressure tanks, air supplies, water supplies, and monitoring pressure regulators in standpipes. The PS120 switch is factory set for 120 psi (8,3 bar) normal system pressure. The switch marked with the word LOW is set to operate at a pressure decrease of 10 psi (0,7 bar) at 110 psi (7,6 bar). The switch marked with the word HIGH is set to operate at a pressure increase of 10 psi (0,7 bar) at 130 psi (9 bar). See section heading Adjustments and Testing if other than factory set point is required.

Technical Specifications

• Conduit Entrances - Two knockouts for 1/2” conduit provided. Individual switch compartments and ground screw suitable for dissimilar voltages
• Contact Ratings - SPDT (Form C), 10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC One SPDT in PS120-1, Two SPDT in PS120-2
• Cover Tamper - Cover incorporates tamper resistant fastener that requires a special key for removal. One key is supplied with each device
• Differential - Typical 2 lbs at 35 psi (0,14 at 2,41 bar), 9 lbs at 225 psi (0,62 at 15,51 bar)
• Dimensions - 3.78”(9,6cm)Wx3.20”(8,1cm)Dx4.22”(10,7cm)H
• Enclosure - Cover: Weather/UV/Flame Resistant High Impact Composite, Base: Die Cast All parts have corrosion resistant finishes
• Environmental Limitations - -40º F to 140ºF (-40ºC to 60ºC), NEMA 4/IP66 Rated Enclosure indoor or outdoor when used with, NEMA 4 conduit fittings
• Factory Adjustment - PS120-1 operates on decrease at 110 psi (7,6 bar) PS120-2 operates in increase at 130 psi (9 bar) and on decrease at 110 psi (7,6 bar)
• Maximum System Pressure - 300 psi (20,68 bar)
• Pressure Connection - Nylon 1/2” NPT male
• Pressure Range - 35-225 psi (2,41 to 15,51 bar)
• Service Use - NFPA 13, 13D, 13R, 14, 72

1341204 Specifications PDF