CBM Pressure switch motor control B70A

3G-CBM-03579 Pressure switches for three-phase motors direct control Pressurecontrolssuitableto controldirectlythe electricmotors of the pumps, compressors, domestic or industrial autoclaves groups. Suitable as well for fluids (gas or liquids) chemically compatible with the friction diaphragm. 86 105 58 Range Differential Sensitive element Connection Protection range beginning range ending max. pressure G/14 degree bar bar bar B70A 0,5 ÷ 7 +0,8 +1,8 +3,5 12 IP40 1 Bar = 100Kpa *The differential must be deducted from the range value. ELECTRICAL FEATURES Double breaking switch for each pole, contacts in silver alloy. EXAMPLE OF ELECTRICAL WIRING Contacts are ope- ning when pressure increases In case of single-phase motors just two poles are connected Nominal insulation tension Ui 415V~ THREE-PHASE SINGLE-PHASE Continuous duty nominal current Ith 25A MOTOR moTOR Operating nominal current in AC-1 le 20A Operating nominal current in AC-3 le 9A Powers controlled by the three-phase motors in AC3: 220/250V 380/415V~ 2,2kW/(3HP) 4kW/(5,5HP) HOMOLOGATION AND STANDARDS Complies with EN 60947-4-1 standards. INSTALLATION Direct installation on the pipe. OPERATION Contacts are opening when pressure rises. Three-pole contact alows the control of single-phase or three-phase motors up to 9A, without contactor. Pressure differential Pressure regulation at 8 regulation at connection: pressure disconnection 7 value rises on screwing 6 Pressure at disconnection 5 (contacts opening) 4 3 Pressure at connection 2 (contacts closing) 1 * EXAMPLE: Pressure at connection 3,5 bar Pressure at disconnection 4,5 bar FEATURES Sensitive element with friction membrane. Adjustable differential. Female connection G 1/4. Cover in shockproof thermoplastic material. Metallic parts are in stainless steel. Earth clamp. Output connections with two cable glands. Maximum temperature of the controlled fluid: 90°C. Pressure switch body admissible temperature: -15 ÷ 60°C. Storage and transport temperature: -35 ÷ 60°C. Unit weight: 0,39 Kg.