Level switch HRH-1 serves for level monitoring in wells, tanks, pools, reservoirs.... options: - single switch with single-state monitoring - single switch with double-state monitoring - 2 independent switches with single-state switching one-state monitors one liquid level ( full or empty), two-state monitors two levels ( switches at one level and switches off at another) selectable by DIP switch: - drain in - drain away - combination adjustable time delay when activated by level change, type selectable by DIP switch sensitivity adjustable by potentiometer frequency 50 Hz prevents liquid polarization and increased oxidation of measuring probes supply AC 230 V or AC/DC 24 V galvanically separated output contact: 2x changeover 16 A /250 V AC1 Technical parameters Function: Supply terminals: Supply voltage: Consumption: Supply voltage tolerance: HRH-1 4 A1 - A2 AC/DC 230 V, AC/DC 24 V, AC 110 V, (galvanicaly separated) max. 4.5 VA -15 %; +10 % Measuring circuit Hysteresis (input - opening): Voltage on electrode: Current in probes: Time reaction: Max. cable capacity: Length of supply wire to probes: Time delay tD: Time delay tH: in an adjustable range 5 kΩ- 100 kΩ max. AC 5 V AC <1 mA max. 400 ms 4 nF max. 100 m adjustable 0.5 -10 sec adjustable 0.5 -10 sec Symbol Connection A1 16 18 28 26 A2 15 25 Un C D H S A1 A2 C Terminals description: A1, A2 - supply voltage C - wire for both probes D - wire of bottom probe E2 H - wire of upper probe E1 S - earth terminal for possible screening of cable 15-16-18 output contact relay 1 25-26-28 output contact relay 2 D H S 16 15 18 28 25 26 MONITORING RELAYS Accuracy Setting accuracy (mech.): Output Number of contacts: Rated current: Breaking capacity: Inrush current: Switching voltage: Min. breaking capacity DC: Mechanical life: Electrical life (AC1): Other information Operating temperature: Storage temperature: Electrical strength: Operating position: Mounting: Protection degree: Overvoltage cathegory: Pollution degree: Max. cable size: Dimensions: Weight: Standards: Measuring sensors: ±5% 2x changeover (AgNi ) 16 A / AC1 4000 VA / AC1, 384 W / DC 30 A / < 3 s 250 V AC1 / 24 V DC 500 mW 3x107 0.7x105 0 -20 .. +55 C -30 .. +70 0C 4 kV (supply - output) any DIN rail EN 60715 IP 40 from front panel III. 2 solid wire max.1x 2.5 or 2x1.5/ with cavern max. 1x1.5 90 x 52 x 65 mm, see page 90-92 240 g EN 60255-6, EN 61010-1 see page 67 Measuring probes Selection of delay type of input H Selection of delay type of input D Inversion of function of input D Function selection: double/single level relay Indication of supply voltage Output contact 1. relay Adjusting delay input H Output contact 2. relay Adjusting delay input D Adjusting sensitivity of probe according to liquid resistance Funktion description It is a relay to control levels of conductive liquids (water, chemical solutions, foodstuff. etc.) It means measuring of liquids by measuring probes. AC voltage 5V / 50 Hz is used as a measuring signal. Using this AC signal prevents increased oxidation of probes and undesirable polarization and electrolysis of liquid. It is possible to control two independent levels or to use a combined function for one level control. It depends on DIP switch setting (see also diagram of functions). Relay is equipped by sensitivity regulation that applies to liquid resistance. When the sensitivity is set according to particular conditions it is possible to eliminate some undesirable switching (e.g. pollution of probes, sediments, humidity etc.) It is also possible to set a delay for each probe in range 0.5 - 10 s and by ussing. DIP switch also the type of delay (when the relay is switched on/off, the choice dependson particular application. Measuring probe can be arbitrary (whatever conductive contact, recommended is using of brass or stainless-steel material). Conductor doesn´t need to be screened, but it is recommened according EMC reports. In application of screened conductor is this contacted to terminal S (the earth potential). 68 Examples of use monitoring 2 independent containers monitoring level with combination of upper and bottom probe A1 A2 C tank with monitored level tank with monitored level 16 15 18 28 25 26 controlling of pump or other output appliance controlling of pump or other output appliance D H S 16 15 18 28 25 26 probe H H S probe D D probe H A1 A2 C common probe C Un common probe C probe D common probe C Un tank with monitored level Output relay for pump controlling. Selection of contacts depends on required function. Note: a tank or metal tube, etc. can be used as a common probe. Due probes that are galvanically separated from suplly voltage and monitoring voltage up to 5V, is possible to use standard communication cables for connection Function C D H C D H C D H C D H a a a a Level monitoring in two tanks A1-A2 tB tA Re2 (25-28) tB tA DIP 3 = tA DIP 3 = tB DIP 4 = tA DIP 4 = tB Input D is inverted when DIP 2 is in position OFF, relay is closed when the container is full. DIP2 = OFF Function H is the same as in previous adjustment. Level monitoring in one tank tB tA Out1 (15-18) DIP 3 = tA DIP 3 = tB tB tA Out1 (15-18) DIP 3 = tA DIP 3 = tB Out2 (25-28) tB tB tA DIP 4 = tA DIP 4 = tB Out1 (15-18) tB tA DIP 3 = tA DIP 3 = tB Out2 (25-26) tB tA DIP 4 = tA DIP 4 = tB 69 Both probes in one container. DIP 1 = 2x DIP 2 = ON Relay 1 - closed when container is full - opened when bottom probe is disconnected Relay 2 - closed when bottom probe is disconnected - opened when upper probe is closed Monitoring liquid in container. DIP 1 = 1x DIP 2 = ON Relay 1 closed when bottom probe is disconnected (liquid is being pumped in). Relay 2 closed (break contact used), when upper probe is connected (liquid is being pumped out). MONITORING RELAYS Out1 (15-18) 2 independent single level switches. Relay closed when container is empty. DIP 1 = 1x DIP 2 = ON Level switch HRH-2 ! ! MONITORING RELAYS Technical parameters Function: Supply terminals: Supply voltage: Consumption: Supply voltage tolerance: Measuring circuit Hysteresis (input resistence): Voltage on electrode: Current in probes: Time reaction: Max. probe capacity: Time delay Accuracy Setting accuracy (mech): Output Number of contacts: Rated current: Breaking capacity: Inrush current: Switching voltage: Min. breaking capacity DC: Mechanical life: Electrical life (AC1): Other information Operating temperature: Storage temperature: Electrical strength: Operating position: Mounting: Protection degree: Overvoltage cathegory: Pollution degree: Max. cable size (mm2): Dimensions: Weight: Standards: Measuring sensors: HRH-2 2 A1 - A2 AC/DC 230 V, AC/DC 24 V or AC 110 V max. 2.5 VA -15 %; +10 % to control levels in wells, basins, reservoirs, pools, tankers... options: - single switch with single-state monitoring - single switch with double-state monitoring ! one-stated monitors one level, two-stated monitors two levels ( switches on one level and breaks on another) ! selection function of: pump up (filling) or pump down (emptying) ! adjustable time delay of output (1 - 10 s) ! adjustable hysteresis (5 - 100 kΩ) ! frequency 50 Hz avoid liquid polarization and oxidation of measuring probes ! supply AC/DC 230 V, AC/DC 24 V or AC/DC 110 V galvanically separated ! Output contakt 1x changeover 16 A / 250 V AC1 ! 1-MODULE, DIN rail mounting Connection Un Two levels monitoring A1 A2 A1 A2 H D H D C S C S max max in an adjustable range 5 kΩ- 100 kΩ max. AC 5 V AC <0.5 mA max. 400 ms 3 nF adjustable 0-10 sec min tank with monitored level 16 A / AC1 4000 VA / AC1, 384 W / DC 30 A / < 3 s 250 V AC1 / 24 V DC 500 mW 3x107 0.7x105 -20.. +55 0C -30.. +70 0C 3.75 kV (supply - sensor) any DIN rail EN 60715 IP 40 from front panel III. 2 solid wire max.1x 2.5 or 2x1.5/ with cavern 1x2.5 90 x 17.6 x 64 mm, see page 90-92 76 g EN 60255-6, EN 61010-1 see page 72 tank with monitored level 15 16 18 15 16 18 Function PUMP UP (FILLING) ±5% 1x changeover (AgNi ) Un One level monitoring PUMP DOWN (EMPTYING) level level Description A1 Supply terminals Level probe terminals A2 H D Output indication Supply indication Adjustable sensitivity sounders Selection of function Time delay for output Symbol A1 C D H S S C 16 18 Level probe terminals 15 16 18 Output contact A2 15 Function description The HRH-2 is conductive liquid level control relay. The HRH-2 can be used with two probes if the chassis of the holding tank is metal, on non conductive tanks is required a third probe. There are used three probes for measuring: H- high level, D - down level, C - common probe. C-probe is also connectable with protective conductor of supply system (PE). The HRH-2 is selectable for pump up or pump down (filling or emptying). It is possible to set device sensitivity according to liquid conduction (appropriate to liquid resistance in range 5Kohms to 100Kohms. When requested controlling of only one level inputs H+D, must be connected and link to sole sensor. When the HRH-2 is set for pump up (filling) on connection of the auxiliary supply and the level is between the min and max probes the output relay will be de-energised. When the level falls below the min probe the relay output will energise after the set time delay. When the HRH-2 is set for pump down (emptying) on connection of the auxiliary supply and the level is between the min and max probes the output relay will be de-energised. For unwanted switching of output contacts due to level swirling is possible to adjust output delay of 1 - 10 sec. There is recommended screened cabel on probes when requested higher immunity against industry interference. 70 Level set HRH-4 Technical parameters HRH-4 Function: Supply voltage: Consumption: Supply voltage tolerance: Measuring circuit Hysteresis (input resistence): Voltage on electrode: Current in probes: Max.length of sensor wires: Time reaction: Max. probe capacity: Time delay: Accuracy Setting accuracy (mech): Output Number of contacts: Rated thermal current: Loading in AC3: Mechanical life: Other information 2 AC/DC 230 V or AC/DC 24 V 7 VA -15 %; +10 % ! in an easy way automatizes operation of pumps depending on level ! control of level in wells, tanks, pools, reservoirs... ! delivered as a connected set – easy installation ! possibility to monitor level of any type of conductive liquid ! designated for an automatic operation in 1-phased and 3-phased pumps ! set of level switch HRH-2 and a contactor VS-425 ! function choice – pumping up or down ! unit doesn’t have its own protection- it is necessary to ad a suitable protection element ! protection degree of the set is IP55 ! there is a possibility of 4 types of probes in a various design (they are not a part of this set) ! unit is placed in a plastic box with dimensions 160x135x83 Connection protection element in an adjustable range 5 kΩ- 100 kΩ AC 5 V / 50 Hz AC <0.5 mA max. 100 m of unscreened wire max. 400 ms 3 nF adjustable 0-10 sec - + ±5% 4x switching 25 A 5.5 kW / 400 V 3x106 A1 A2 H D C S VS425-40 control lamp Operation temperature: Storage temperature: Electrical strength (supply-output): Operating position: Protection degree: Pollution degree: Dimensions: Weight: Standards: Measuring sensors: -20.. +55 0C -30.. +70 0C 4 kV, galvanically insulated any IP 55 screening is not necessary M 2 160x135x83 834 g EN 60255-6, EN 61010-1 see page 72 Funktion description 1. function PUMP UP level output of a contactor 2. function PUMP DOWN level output of a contactor 71 1) PUMP UP - in case the level falls under a lower limit ( sensor D), a relay switches and a pump pumps a liquid up until it reaches an upper limit ( probe H), then a relay opens and a pump stops pumping. When a level reaches a lower limit again, all process is repeated. After the device is energized, relay automatically closes and a pump pumps liquid to upper limit. 2) PUMP DOWN - in case a level reaches over an upper limit, a relay closes and a pump pumps liquid down. In case a level reaches a lower limit, a relay opens and a pump stops pumping.. When energized, a relay is in an open state and a pump operates only after an upper limit is exceeded. 3) In case you combine inputs H and D and connect them to one probe, the device will keep only one level (upper and lower limit will become one). In function PUMP UP relay closes in case the level falls under a probe level. A pump pumps liquid up and in case the level reaches a probe level, a relay opens and a pump stops. The level is kept in a small range around the probe. In function PUMP DOWN relays closes in case a level reaches a probe level. A pump pumps down until the level reaches a probe, then relay opens and pump stops. MONITORING RELAYS 15 16 18 Level sensors SHR - Level switches accessories SHR-1-M: brass sensor SHR-1-M SHR-1-N SHR-1-N: stainless steel sensor ! sensor to control flooding ! electrode with diametr 4 mm is placed in plastic cover with 12 mm screw with nut ! panel or to holder mounting ! conductor is connected to terminal board, shrink bushing for feeder place insulation is a part of device ! max. wire profile: 2.5 mm2 ! installation: after connecting a wire to the sensor, run the shrink bushing over the wire onto the sensor. Heat the sensor and by shrinking the connection of sensor and wire will be hermetical ! weight: 9.7 g ! operating temperature: - 25...+60 0 C ! total sensor lenght: 65.5 mm SHR-2 ! ! ! detection sensor is electrode, which in connection with switchable device is used for level detection for example in wells,tanks,... to be ued in electric conductive fluids and mechanically polluted fluids with temperature: +1...+80 0 C stainless steel one-pole electrode reside in PVC cover, intended for tank wall mounting or mounting by socket ! to ensure corret function of the sensor, it is necessary to have the electrode without dirt which could disable the connection of the electrode and fluid and thus lead to malfunction ! max. wire profile: 2.5 mm 2 , recomended wire ÖLFLON FEP 1x1.0 BK ! installation: - conductor wire is connected by feazing of two brass screws to stainless steel electrode - conductor is caulked by bushing Pg7 with protection degree IP68 ! weight: 48.6 g ! dimensions: max. diameter 21 mm, lenght 96 mm ! ! ! ! ! ! ! ! ! ! ! SHR-3 stainless probe to be used into demanding industrial environments, designated for screwing into tank wall or cover the probe is installed in horisontal, vertical or in sidelong position on tank side or in tank cover. Installation is done by soldering or by fixing nut. It is necessary to use 24mm screw. It is necessary to use an adequate torque with regards to a seal and operational overpressure in a tank sensor has connecting wire - lenght 3 m, which is connected to sensor to scan electrode and sensor bushing connecting wire is double-wire PVC 2 x 0.75 mm 2 , connection of wires: brown - scan electrode, blue - sensor bushing connection M18x1.5 screw protection degree IP 67, sensor weight without cable: 100 g operating surroundings: place without the danger of detonation , temperature on screw: max. 95 O C, pressure immunity: on 25 O C 4 MPa, on 95 O C 1.5 MPa weight: 239 g material: bushing and sean electrode: stainless steel W.Nr. 1.4301, insulation insert of electrode: PTFE, internal material: self - extinguishing epoxide resin 6 hr OK24 23.5 12 14 Dimensions M18x1.5 MONITORING RELAYS SHR-2 in open state 12 13 37 72
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