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Signal- and Motor-Rated Float Switch Matrix Signal-rated mechanical floats'(for control switch applications) P Model' Normally open Mechanical Yes n/a n/a n/a 2.00 In. 1.50 In. 0.50 in. 2.00 in. N Model- Normally closed Mechanical Yes n/a n/a n/a 2.00 in. 1.50 in. 0.50 in. 2.00 in. Motor-rated floats'(for pump switch applications) B Model Normally open Mechanical No 120V 13A 1/2 hp 2.00 In" 2.50 In. 1.50 in. 4.00 in. 240V 13A 1 hp 3.00 in. 3.00 in. 1.50 in. 4.50 in. 4.00 in. 3.25 in. 1.50 in. 4.75 in. C Model Normally open Mechanical No 120V 13A 1/2 hp 2.00 in. 3.00 in. 2.50 in. 5.50 In. 4 240V 15A 2 hp 3.00 in.' 3.50 in. 3.00 in. 6.50 in. 4.00 in. 4.00 in. 3.50 in. 7.50 in. 5.00 in. 4.50 in. 4.00 in. 8.50 in. 6 6.00 in. 5.25 in. 4.25 in. 9.50 in. {t G Model Normally open Mercury Yes 120V 15A 3/4 hp 2.00 in. 1.50 in. 3.00 in. 4.50 in. 240V 15A 2 hp 3.00 in" 1.75 in. 3.00 In. 4.75 in. 4.00 in. 2.00 in. 3.50 in. 5.50 in. a.Suitable for use with VCOM and MVP. b.Standard tether length Notes 'State:normally open or normally closed 'Drawdown The default state of a float-normally open or normally closed-refers to the contact Drawdown(in inches)rotors to the difference in liquid level between a float switch's activation positions In the float when the float Is resting(down).Float switches have an internal contact, and deactivation points.Douses wn can be altered by adjusting the tether length of the float the terns"normally open'gfAg and"normally closed"(N/C)rotor to the state of the float switch cord.When selecting float switches,keep In mind that any float switch that can directly switch contact in the down position.A normally open float switch ties an open contact(oft/in start and stop a pump(one that has no motor contactor in the control panel)should have a ; the dove fashion and a normally closed float switch has a closed contact(on)in the down drawdown capability,to avoid rapid cycling of the pump. position.Different panel functions require different types of float switches.Most applfcadons +Signal-rated or motor-rated require float switches that are normally open.One notable exception is file redundant oh and Every float has a maximum amount of current it can handle.Exceeding these limits may cause low-level alarm function that requires a normally closed float swilch,except with MVP and premature failure.Signal-rated or"control"goats are used to aclivate pump comm/panels VCOM panels. and alarms.Only low-amperage signals pass through these float switches,hence the float 'IR tintrinsicallysafe relay) switch is'signal-rated."All Orenco panels that use motor contactors can use signal rated float Approved for use with intrinsically safe,Class I,Division 1 applications,where reliable float switches.In some systems,a float switch is used to directly start and stop a pump.In this i switch operation with very low current is required. application,the current that Is running the pump passes through the float switch as well,and the goat switch must be"motor-rated."lo most instances,a motor-rated goat switch can be used as a signal float witch. NTD-MP-MP-1 Orenco Systems®Inc.,814 Almay Ave.,Sutherlin,OR 97479 USA-800.348.9843-541-459.4449-www.arenco.com Rev.3A,®03117 Page 2 of 2 U