New liquid level monitoring relays EPR Product presentation 24.08.2015 CM-ENS New liquid level monitoring relays

Liquid level monitoring and control relays CM-ENS are the new liquid level monitoring relays They replace the former ENS and ENN relays Liquid level monitoring relays are typically used in pump applications Depending on the application they control pumps to fill or empty containers with liquid In such applications the liquid level is detected by electrodes in conductive fluids © ABB Group November 10, 2018

Liquid level monitoring and control relays New CM-ENS – features and benefits Benefits High EMC immunity due to advanced measurement technology leads to reliability in harsh conditions Wide-range supply design reducing the number of variants Compact 22,5 mm (0.89 in) wide housing Housing material according highest fire protection classification UL 94 V-0 All materials fulfill the highest environmental standards 2 wiring technologies Screw connection Easy connect Tool-free mounting and demounting on DIN rail Easy to adjust via front side potentiometer © ABB Group November 10, 2018

Liquid level monitoring and control relays New CM-ENS – features and benefits General features: Temperature range -25…+60°C 3 Status LEDs Approvals cULus 508, CB, GL/DNV, EAC, RMRS, CCC Marks CE, RCM © ABB Group November 10, 2018

Liquid level monitoring and control relays New CM-ENS - 3 types CM-ENS.1xx CM-ENS.2xx CM-ENS.31x © ABB Group November 10, 2018

Liquid level monitoring and control relays CM-ENS.1xx for drain protection Supply voltage CM-ENS.11x 24 – 240 V AC/DC CM-ENS.13x 110 – 130 / 220 – 240 V AC Connection technology CM-ENS.1xP Easy connect with push-in CM-ENS.1xS Screw connection Adjustable response sensitivity 5 - 100 kΩ © ABB Group November 10, 2018

Liquid level monitoring and control relays CM-ENS.2xx for fill and drain protection Supply voltage CM-ENS.21x 24 – 240 V AC/DC CM-ENS.23x 110 – 130 / 220 – 240 V AC Connection technology CM-ENS.2xP Easy connect with push-in CM-ENS.2xS Screw connection Adjustable response sensitivity 0,1 - 1000 kΩ Control of one or two liquid levels (min/max) Fill (UP) or Drain (DOWN) selectable © ABB Group November 10, 2018

Liquid level monitoring and control relays CM-ENS.31x for fill and drain protection Supply voltage CM-ENS.31x 24 – 240 V AC/DC Connection technology CM-ENS.31P Easy connect with push-in CM-ENS.31S Screw connection Adjustable response sensitivity 0,1 - 1000 kΩ Control of one or two liquid levels (min/max) Fill (UP) or Drain (DOWN) selectable Selectable ON- or OFF-delay 2 c/o contacts © ABB Group November 10, 2018

Liquid level monitoring and control relays CM-ENS – working principle Emptying a tank = draining Conductive measuring principle: The liquid level monitoring relay puts an AC voltage onto the electrodes and monitors if a current is flowing or not This principle works only with conductive liquids such as: water, drinking water, sea water, waste water, acids, base, liquid fertilizers, milk, beer, coffee, low-percentage alcohol, etc. Not suitable for: Chemically pure water, oils, paraffins, or explosive fluids: Fuel/petrol, explosive liquids, ethylene glycol, high percentage alcohol Common electrode: When using a metal tank the electrode -C is not required. The cable can be connected directly to the metallic surface of the tank. Filling a tank © ABB Group November 10, 2018

Liquid level monitoring and control relays CM-ENS – advanced Cascading: The electrode inputs can be intercon-nected as required, which ensures a simple monitoring of different liquid levels © ABB Group November 10, 2018

Liquid level monitoring and control relays Applications Typical applications for liquid level monitoring relays Protection of pumps against dry running Protection against container overflow Control of liquid levels Detection of leaks Control of mixing ratios Use of liquid level monitoring relays All kind of motor starter solutions like Star-Delta starters Softstarter Drives © ABB Group November 10, 2018

Liquid level monitoring and control relays Domestic applications Pump control through level monitoring in domestic water tanks. Water level control for swimming-pools to prevent dry-running or spillover when filling o draining the pool. © ABB Group November 10, 2018

Liquid level monitoring and control relays Mining Industry Protection of submersible pumps for water extraction Tank spillover protection for waste mining water processing (environmental hazard) © ABB Group November 10, 2018

Liquid level monitoring and control relays Oil Industry Protection of pump cavitations for water reinjection for: - water disposal - secondary recovery - formation fracture Protection of spillover of injection water (environmental hazard) © ABB Group November 10, 2018

Liquid level monitoring and control relays Food Industry Filling control of cistern trucks Fill control of ingredients for food processing. © ABB Group November 10, 2018

Liquid level monitoring and control relays Special applications for pure and ultra pure water Water as close as possible to H2O The specific resistivity of the pure water varies between 0.1 MΩ.cm and 15MΩ.cm Food industry: Preparation of beverage Pharmaceutical and cosmetics: Preparation of buffers and culture media, glassware washing. Medical applications: Water for dialysis. Semi-conductor industry: cleaning the surfaces of semiconductor wafers and liquid crystal panels. © ABB Group November 10, 2018

Liquid level monitoring and control relays Electrodes Bar electrode For general-purpose use, such as water supply lines For areas with limited space When mounting strength is required Suspension electrode For installation at long distances from the liquid level © ABB Group November 10, 2018

Liquid level monitoring and control relays Bar electrodes © ABB Group November 10, 2018

Liquid level monitoring and control relays Suspension electrodes New CM-HC Suspension electrode Art.-No. 1SVR 402 902 R1000 New CM-HCT Suspension electrode, suitable for drinking water Art.-No. 1SVR 402 902 R2000 CM-HE Suspension electrode Art.-No. 1SVR 402 902 R0000 © ABB Group November 10, 2018