Data sheet. June 2000 DKACT.PD.P10.F B0370

Transcription

1 Pressure contros and thermostats types KPI and KP June 2000 DKACT.PD.P10.F B0370

2 Pressure contros and thermostats, types KPI and KP Contents Pressure contros KP 35, KP 36, KPI 35, KPI 36 and KPI 38 Introduction... page 3 Features... page 3 Definitions... page 3 Ordering... page 4 Technica data... page 5 Setting... page 6 God contacts... page 6 Design and function... page 7 KP features... page 7 KPI features... page 7 Dimensions and weights... page 8 Accessories for KP/KPI pressure contros... page 8 Dua pressure contro KP 44 Introduction... page 9 Features... page 9 Definitions... page 9 Ordering... page 10 Technica data... page 10 Design and function... page 11 Pressure setting... page 12 Dimensions and weight... page 12 Accessories for KP 44 pressure contros... page 12 Thermostats KP 75, KP 78, KP 79 and KP 81 Introduction... page 13 Features... page 13 Definitions... page 13 Ordering... page 14 Technica data... page 14 Design and function... page 15 Setting... page 15 Charges... page 16 God contacts... page 16 Dimensions and weight... page 17 Accessories for KP thermostats... page 18 Grade of encosure IP 33/44 encosure... page 19 IP testing... page 19 ISO 9001 quaity approva Danfoss A/S is certificated by BSI in accordance with internationa standard ISO This means that Danfoss fufis the internationa standard in respect of product deveopment, design, production and sae. BSI exercises continuous inspection to ensure that Danfoss observes the requirements of the standard and that Danfoss own quaity assurance system is maintained at the required eve. 2 DKACT.PD.P10.F1.02

3 Pressure contros and thermostats, types KPI and KP KP/KPI iustrated is KPI 35 with top cover Introduction Danfoss KP/KPI pressure contros are used for reguating, monitoring and aarm systems in industry. KP pressure contros are for gaseous media and air. KPI pressure contros are suitabe for pant in connection with iquid and gaseous media. The pressure contros are fitted with a singepoe switch changeover (SPDT). The position of the switch depends on the setting of the pressure contro and the pressure in the connector. Features Wide reguating range Can be used for pumps and compressors Sma dimensions. Space-saving easy to insta in panes Shock and impact resistant Utra-short bounce times. Limits wear to an absoute minimum and increases reiabiity Eectrica connection from front of unit. Makes rack mounting easier and aso saves space Suitabe for both aternating current and direct current Cabe entry for 6-14 mm diameter cabes Screwed cabe entry makes rewiring easy. Standard screwed cabe entry Pg 13.5 and Pg 16 Definitions Range setting The pressure range within which the unit wi give a signa (contact changeover). Differentia The difference between contact changeover on rising and faing pressure. The differentia is a condition for stabe automatic pant operation. Automatic reset Units with automatic reset restart automaticay after stop. Min. reset units wi restart after the pressure has risen by a vaue greater than that of the fixed differentia. Max. reset units wi restart after the pressure has faen by a vaue greater than that of the fixed differentia Permissibe operating pressure The highest permissibe constant pressure or pressure variation the unit can be exposed to. DKACT.PD.P10.F1.02 3

4 Pressure contros and thermostats, types KPI and KP Ordering, IP 33/44 versions Pressure contros type KP 35 and 36 Setting Permissibe range Differentia operating Max. test Pressure Contact Code no. Type p e pressure p B pressure [bar] [bar] [bar] [bar] connection Materia G 1 / 4 A G 1 / 4 A G 1 / 4 A Ag Au Ag Au Ag Au KP 35 KP 36 KP 36 Ordering, IP 33/44 versions Pressure contros type KPI Setting Permissibe range Differentia operating Max. test Pressure Contact Code no. Type p e pressure p B pressure [bar] [bar] [bar] [bar] connection Materia G 1 / 4 A G 1 / 4 A G 1 / 4 A G 1 / 4 A G 1 / 4 A Ag Au Ag Au Ag Au Ag Au Ag Au KPI 35 KPI 35 KPI 36 KPI 36 KPI 38 4 DKACT.PD.P10.F1.02

5 Pressure contros and thermostats, types KPI and KP Technica data Description KP KPI Ambient temperature C 40 C C (for short periods up to +80 C) Media temperature C 40 C C Media Gaseous media and air Air, oi, fresh water Parts in contact Beows Tinbronze W. no to DIN Tinbronze W. no to DIN with medium Pressure connector Free-cutting stee W. no to DIN 1651 Brass W. no to DIN Contact system Singe-poe changeover switch (SPDT) Aternating current: Aternating current: AC-1: 16 A, 400 V AC-1: 10 A, 440 V Contact oad, Ag contact set AC-3: 16 A, 400 V AC-3: 6 A, 440 V AC-15: 10 A, 400V AC-15: 4 A, 440V Contact materia AgCdO Direct current: Direct current: DC-13: 12 W, 220 V DC-13: 12 W, 220 V Contact oad, Au contact set See information page 6 Encosure, IP 33 grade Unit must be mounted on a fat surface/a fat fitting and a unused hoes covered. Encosure, IP 44 grade Mounted as IP 33 pus fitting of top cover, code no Cabe connection Entry for 6-14 mm diameter cabes Mounted on back pate/wa bracket Vibration proof in the range Hz, 4 g (1 g = 9.81 m/s 2 ) Mounted on ange bracket Approvas Not recommended in areas where vibrations occur EN ,5 EN ,5 RINA, Registro Itaiano Navae MRS, Maritime Reg. of Shipping, Russia UL approved versions are avaiabe DKACT.PD.P10.F1.02 5

6 Pressure contros and thermostats, types KPI and KP Setting KP/KPI pressure contros with automatic reset: Set the upper imit pressure on the range scae. Then set the ower imit pressure on the DIFF scae (the upper imit minus the differentia). Range Diff. God contacts Contact system Singe-poe changeover switch (SPDT) Contact materia: God-pated siver Contact oad Aternating current: Ohmic oad: AC-1: 10 A, 440 V Inductive oad: AC-3: 6 A, 440 V AC-15: 4 A, 440 V Direct current: DC-1312 W, 220 V, Curve A gives the maximum oad. Hatched area B: Acceptabe oad for the god pating of the contact. 6 DKACT.PD.P10.F1.02

7 Pressure contros and thermostats, types KPI and KP Design and function Drawing showing principe of KP pressure contros Drawing showing principe of KPI pressure contros 1. Setting spinde 2. Differentia setting spinde 3. Main arm 4. Main spring 5. Differentia spring 6. Beows 7. Connector 8. Contact system 9. Connection terminas 10. Earth termina 11. Cabe entry 12. Omega spring (KPI) 12. Tumber (KP) 13. Locking screw (KPI) 13. Locking pate (KP) KP features The contact system in KP pressure contros has a snap function. This means that the beows is active ony when the cut-in or cut-out vaue is reached. The beows is connected to the pressure of the controed pant via the connector (7). The design of KP pressure contros gives the foowing advantages: High contact oad Utra-short bounce times Vibration-proof in the range Hz, 4 g (1 g = 9.81 m/s 2 ) Long operating ife High pusation protection Sma dimensions Easy to mount in panes KPI features Danfoss KPI pressure contros are designed so that the beows moves in the same proportion as the pressure change. To ensure a snap function on contact changeover, an omega spring is ocated between beows and contact system. The design of KPI pressure contros gives the foowing advantages: High contact oad Utra-short bounce times Vibration-proof in the range Hz, 4 g (1 g = 9.81 m/s 2 ) Long operating ife Can be used for both iquids and gases Sma dimensions Easy to mount in panes DKACT.PD.P10.F1.02 7

8 Pressure contros and thermostats, types KPI and KP Dimensions and weights 14 Pressure contros KP 35, KP 36, KPI 35, KPI 36 and KPI 38: Weight approx. 0.3 kg Accessories for KP/KPI pressure contros Part Symbo Description Tota Code no. Wa bracket Brackets with mounting screws Ange bracket and washers 4-off screws M off washers Screwed cabe entry Screwed Pg 13.5 with specia nut. cabe entry For 6-14 mm cabes A standard Pg 16 screwed cabe entry can be used for 8-16 mm cabes. Seaing screw For seaing the setting on KP Top cover If a bracket is mounted on the backpate of the housing, the KP/KPI pressure contro wi have an IP 44 grade of encosure. The cover covers the setting spindes. Protective cap for KP/KPI pressure contros. To protect the unit against rain and humidity. Protective cap Grade of encosure: IP Materia: Poyethyene Max. ambient temperature: 65 C Min. ambient temperature: 40 C 8 DKACT.PD.P10.F1.02

9 Pressure contros and thermostats, types KPI and KP KP 44 Introduction Danfoss dua pressure switch KP 44 is designed for use as a pump guard to contro and protect suppy water pumps. The KP 44 pump guard combines the function of a pressure switch and a fow monitoring device. The efthand pressure beows contros the pump pressure. The righthand beows cuts out the pump if the pump suction pressure is too ow. In this way the pump is protected from running dry and consequent bearing damage. Features Wide reguating range Can be used for pumps and compressors Sma dimensions. Space-saving easy to insta in panes Utra-short bounce times. Limits wear to an absoute minimum and increases reiabiity Eectrica connection from front of unit. Makes rack mounting easier and aso saves space Suitabe for both aternating current and direct current Cabe entry for 6-14 mm diameter cabes Screwed cabe entry makes rewiring easy. Standard screwed cabe entry Pg 13.5 and Pg 16 Efficient protection of water pumps in case of water suppy fais. Definitions Range setting The pressure range within which the unit wi give a signa (contact changeover). Differentia The difference between contact changeover on rising and faing pressure. The differentia is a condition for stabe automatic pant operation. Automatic reset Units with automatic reset restart automaticay after stop. Min. reset units wi restart after the pressure has risen by a vaue greater than that of the fixed differentia. Max. reset units wi restart after the pressure has faen by a vaue greater than that of the fixed differentia Permissibe operating pressure The highest permissibe constant pressure or pressure variation the unit can be exposed to. DKACT.PD.P10.F1.02 9

10 Pressure contros and thermostats, types KPI and KP Ordering Pressure contro type KP 44, IP 22 Pressure range Differentia Permissibe Max. test Pressure Contact Code no. operating pressure connection Materia Contro Safety Contro Safety pressure p B [bar] [bar] [bar] [bar] [bar] [bar] LP/HP: G 1 / 4 A Ag Technica data Ambient temperature C Media temperature C Max +100 C Media 40 C C (for short periods up to +80 C) Fresh water Parts in contact Beows Tinbronze W. no to DIN with medium Pressure connector Free-cutting stee W. no to DIN 1651 Contact materia AgCdO Aternating current: AC-1: 16 A, 400 V AC-3: 16 A, 400 V AC-15: 10 A, 400V Contact oad, Ag contact set Direct current: DC-13: 12 W, 220 V Approvas EN ,-5 Cabe connection Entry for 6-14 mm diameter cabes Mounted on backpate or wa bracket Vibration-proof in the range Hz, 4 g (1 g = 9.81 m/s 2 ) Mounting on ange bracket Not recommended for areas where vibration occurs 10 DKACT.PD.P10.F1.02

11 Pressure contros and thermostats, types KPI and KP Design and function 1. Lefthand pressure setting spinde 2. Differentia setting spinde 3. Main arm 4. Righthand pressure setting spinde 5. Main spring 6. Differentia spring 7. Beows 8. Pressure connections 9. Switch 10. Termina 11. Earth termina 12. Cabe entry 13. Tumber 14. Locking pate 15. Impuse ever The switch in the KP has a snap-action function, and the beows moves ony when the cut-in or cut-out vaue is reached. Water suppy from reservoir or we If water is running short in the we or reservoir, the pump wi no onger be abe to increase the pressure to the cut-out vaue. Consequenty the pump wi keep running - perhaps without water. However, the KP 44 pump guard wi stop the pump as soon as the righthand beows pressure drops beow the safety cut-out setting. The pump can be started again by ifting the impuse ever. The pump wi continue to operate when the impuse ever is reeased, provided that the righthand beows pressure is higher than the safety cut-out setting pus a fixed differentia of 1 bar. If this is not the case, the pump wi cut-out again indicating insufficient water suppy. Pressurized water suppy direct to pump When water suppy fais on the inet side, the pump wi no onger be abe to boost the pressure to the cut-out vaue. Consequenty the pump wi keep running - perhaps without water. However, the KP 44 pump guard wi stop the pump as soon as the pressure in the pump suction ine drops beow the safety cut-out setting. The pump wi automaticay start again when the pump suction pressure has reached the eve of 1 bar above the safety cut-out setting. Automatic start-up wi ony take pace if the righthand beows is connected to the pump suction ine. Air pockets shoud be avoided to prevent the pump from starting up on air pressure rise, without the presence of water. In a hydrophore system where water is pumped from a we or an open tank, both beows are connected to a pressure outet on the air side in the pump pressure ine, if possibe. In a booster system receiving pressurized water the righthand beows is connected - to the ow pressure side of the pump for automatic start-up. - to the high pressure side of the pump for manua start-up. The efthand beows is aways connected to the high pressure side of the pump. DKACT.PD.P10.F

12 Pressure contros and thermostats, types KPI and KP Pressure settings Safety cut-out setting The righthand beows wi automaticay cut-out the pump at the safety cut-out setpoint. Automatic start-up, if any, wi take pace when the pressure has reached the eve of 1 bar above the setpoint. Manua cut-in is made by ifting the impuse ever and reeasing it again when the pressure has increased by min. 1 bar. The safety cut-out setpoint is normay determined by the static pressure (the water coumn). However, in order to avoid disturbing signa interaction, care shoud be taken to ensure that the safety cut-out setting is at east 1.5 bar ower than the contro pressure cut-in setting. See tabe with pressure setting exampes beow. Required tap water pressure ³ 2.3 bar ³ 4.0 bar ³ 5.0 bar ³ 8.0 bar Contro pressure cut-out setting 3.0 bar 5.0 bar 8.0 bar 12 bar Differentia 0.7 bar 1.0 bar 3.0 bar 4.0 bar Contro pressure cut-in setting 2.3 bar 4.0 bar 5.0 bar 8.0 bar Max. safety cut-out setting 0.8 bar 2.5 bar 3.5 bar 6.0* bar * 6.0 bar is the norma max. setpoint Contro pressure settings Contro pressure cut-out setpoint is set on the efthand pressure setting scae. The differentia is set between 0.7 and 4 bar. The contro pressure cut-in setting wi be the cut-out contro pressure ess the differentia. Dimensions and weight Weight approximatey 0.5 kg Accessories for KP 44 pressure contros Part Symbo Description Tota Code no. Wa bracket Brackets with mounting screws Ange bracket and washers 4-off screws M off washers Screwed cabe entry Screwed Pg 13.5 with specia nut. cabe entry For 6-14 mm cabes A standard Pg 16 screwed cabe entry can be used for 8-16 mm cabes. Seaing screw For seaing the setting DKACT.PD.P10.F1.02

13 Pressure contros and thermostats, types KPI and KP Introduction Danfoss KP thermostats are used for reguating, monitoring and aarm systems in industry. KP thermostats are temperature-operated eectric circuit breakers. The thermostats are fitted with a singe-poe switch (SPDT) The position of the switch depends on the thermostat setting and sensor temperature. A KP thermostat can be connected and switch to singe-phase aternating current motors of up to about 2 kw. Features Definitions Wide reguating range Sma dimensions Space-saving - easy to insta in panes Utra-short bounce time. Limits wear to an absoute minimum and increases reiabiity. Eectrica connection at front of unit. Makes rack mounting easier and aso saves space Differentia The difference between cut-in and cut-out temperature. The differentia is a condition for stabe automatic pant operation. Mechanica differentia (intrinsic differentia) The differentia set on the differentia spinde of the unit. Working differentia (therma differentia) The differentia on which the pant operates. The working differentia is the sum of the mechanica differentia and the differentia arising from the time constant. Suitabe for both aternating current and direct current Cabe entry for 6-14 mm diameter cabes Screwed cabe entry makes rewiring easy Standard screwed cabe entry Pg 13.5 and Pg 16 Reset 1.Manua reset. Resets ony when the reset button is pressed. Min. reset units wi restart after the temperature at the thermostat sensor has risen by a vaue greater than that of the fixed differentia. Max. reset units wi restart after the temperature at the thermostat sensor has faen by a vaue greater than that of the fixed differentia 2.Automatic reset. Units with automatic reset restart automaticay after stop. DKACT.PD.P10.F

14 Pressure contros and thermostats, types KPI and KP Ordering Thermostats type KP 75 - KP 81 Setting range Differentia Max. sensor Capiary tube Contact Code no. Type p e [ C] [ C] temperature [ C] ength m Materia Room sensor Ag Au Ag Au Ag Au Ag Au Ag Au Ag Au Ag Au 060L L L L L L L L L L L L L L1217 KP 75 KP 78 KP 79 KP 79 KP 81 KP 81 KP 81 8 Ag 060L KP 81 (Max. reset) Au 060L1218 (max. reset) Technica data Ambient temperature C Sensor materia 40 C C (for short periods up to +80 C) Tinned copper Cu/Sn5 Contact system Singe-poe changeover switch (SPDT Contact oad, Ag contact set Contact materia AgCdO Aternating current AC-1: AC-3: AC-15: Direct current: DC-13: 16 A,400 V 16 A, 400 V 10 A, 400 V 12 W, 220V Contact oad, Au contact set See information page 16 Encosure, IP 33 grade Unit must be mounted on a fat surface/a fat fitting and a unused hoes covered. Encosure, IP 44 grade Mounted as IP 33 pus fitting of top cover, code no Approvas EN ,-5 RINA, Regristro Itaiano Navae MRS, Maritime Reg. of Shipping, Russia Bureau Veritas Germanischer Loyd, Germany DNV, Det norske Veritas, Norway Poski Rejestr Statkow, Poand UL approved version are avaiabe Cabe connection Entry for 6-14 mm diameter cabes Mounted on backpate Vibration-proof in the range Hz, 4 g (1 g = 9.81 m/s 2 ) or wa bracket Mounted on ange bracket Not recommended for areas where vibration occurs 14 DKACT.PD.P10.F1.02

15 Pressure contros and thermostats, types KPI and KP Design and function 1. Temperature setting spinde 2. Differentia setting spinde 3. Main arm 7. Main spring 8. Differentia spring 9. Beows 12. Contact system 13. Connection terminas 14. Earth termina 15. Cabe entry 16. Tumber 17. Sensor KP 78, KP 79, KP 81 Drawing showing principe of KP thermostats The contact system in KP thermostats has a snap function. This means that the beows is active ony when the cut-in or cut-out vaue is reached. The design of KP thermostats gives the foowing advantages: KP 75 room sensor High contact oad Utra-short bounce times. Limits wear to an absoute minimum and increases reiabiity. Vibration-proof in the range Hz, 4 g (1 g = 9.81 m/s 2 ) Long operating ife Setting Thermostats with automatic reset Set the upper imit temperature on the range scae. Then set the differentia on the DIFF scae. The temperature set on the range scae is aso the temperature at which contact changeover re-occurs on rising temperature. The contacts changeover when the temperature has faen to a vaue ower than that set on the DIFF scae. If at ower settings the pant wi not start/stop, the reason might be that the differentia has been set too high. Thermostats with minimum reset Set the temperature on the range scae. The differentia setting is fixed. Min. reset units wi restart after the temperature at the thermostat sensor has risen by a vaue greater than that of the fixed differentia. Thermostats with maximum reset Set the stop temperature on the range scae. The differentia setting is fixed. Max. reset units wi restart after the temperature at the thermostat sensor has faen by a vaue greater than that of the fixed differentia DKACT.PD.P10.F

16 Pressure contros and thermostats, types KPI and KP Charges Absorption charge The charge consists party of a superheated gas and party of a soid substance with a arge absorption surface. The soid substance is concentrated in the sensor (17), and consequenty it is aways the sensor that comprises the temperaturereguating part of the thermostatic eement. The sensor can be paced both warmer or coder than the thermostat housing and capiary tube. However, pacing it in an ambient temperature higher or ower than +20 C can affect the accuracy of the scae. 9. Beows 19. Capiary tube 17. Sensor God contacts Contact system Singe-poe changeover switch (SPDT) Contact materia: God-pated siver Contact oad Aternating current: Ohmic oad: AC-1: 10 A, 440 V Inductive oad: AC-3: 6 A, 440 V AC-15: 4 A, 440 V Direct current: DC-13: 12 W, 220 V Curve A gives the maximum oad. Hatched area B: Acceptabe oad for the god pating of the contact. 16 DKACT.PD.P10.F1.02

17 Pressure contros and thermostats, types KPI and KP Dimensions and weight Thermostats KP 75, KP 78, KP 79, KP 81 Weight approx. 0.4 kg KP 75 Sensor: Tinned copper Cu/Sn 5 KP 78, 79, 81 Sensor: Tinned copper Cu/Sn 5 Wa bracket Ange bracket DKACT.PD.P10.F

18 Pressure contros and thermostats, types KPI and KP Accessories for KP thermostats Part Symbo Description Tota Code no. Wa bracket for KP Brackets with mounting Ange bracket for KP screws and washers 4-off screws M off washers Capiary tube gand Oi-resistant rubber gasket for max. 110 C and 90 bar For thermostats with Æ9.5 mm sensors Sensor hoder Rubber pug for wa entry Æ13x20 mm 1 set Sensor hoder for wa mounting with four capiary tub cips and 9-off 12 mm pins Knob Pg 13.5 with specia nut. Screwed cabe entry For 6-14 mm diameter cabes. A standard Pg 16 cabe entry can be used for mm diameter cabes. Seaing screw Top cover For seaing the setting on KP If a bracket is mounted on the backpate of the housing, the KP thermostats wi have an IP 44 grade of encosure The cover covers the setting spindes. Protective cap for KP thermostats. To protect the unit against rain and humidity. Protective Grade of encosure: IP cap Materia: Poyethyene Max. ambient temperature: 65 C Min. ambient temperature: 40 C Sensor pocket Brass Stainess stee For a KP thermostats with cyindrica remote sensor. Sensor pocket, gasket and union for screwing into G 1 /2 connectors weded onto tubes, containers, etc. Int. diameter 9.6 mm, insert depth 112 mm (brass). Ext. diameter 11 mm Int. diameter 9.6 mm, insert depth 112 mm (st. 18/8). Ext. diameter 11 mm Int. diameter 9.6 mm, insert depth 465 mm (brass). Ext. diameter 11 mm Permissibe pressure of sensor pipe medium Media temperature for sensor: 250 C This temperature can be increased by appying a different gasket materia Tube For KP and RT thermostats with sensor mounted in a sensor pocket. Temperature range: C Heat- (short-ived +220 C) conductive auminium paste Tube with 5 g auminium paste 1 041E0110 Tin Tin with 750 g auminium paste 1 041E DKACT.PD.P10.F1.02

19 Pressure contros and thermostats, types KPI and KP IP 33/44 encosure IP 33 grade of encosure is obtained by mounting the unit on a fat surface or a fat fitting and then covering a unused hoes. IP 44 grade of encosure is obtained by mounting the unit as for IP 33 grade of encosure and then fitting a top cover, code no Aternativey the unit can be mounted in a poyethyene protective cap, type no IP testing An IP grade of encosure certification is obtained when the product has been submitted to an IP test. The IP cassification contains two digits, the first IP digit denoting the degree of encosure against foreign bodies, the second digit denoting the degree of watertightness. The corresponding tests are as foows: IP 1st digit Foreign body Test IP 2nd digit 0 No test 0 No test Watertightness Test 1 ) 1 A ba of Æ50 mm cannot enter 1 Verticay faing drops, dripping water 2 A ba of Æ12.5 mm and a test probe of Æ12 mm, L = 80 mm, cannot be inserted 2 Verticay (±15 ) faing drops 3 A rod of Æ2.5 mm cannot enter 3 Water sprays ±60 from vertica 4 A wire of Æ1 mm cannot enter 4 Water sprays from a directions 5 As 4 + Dust in amounts that might cause damage cannot enter 5 Water jets from a directions, 12 /min 6 As 4 + Dust cannot enter 6 Water jets from a directions, 100 /min 7 Immersion in 1 m water 8 Subject to agreement 1 ) After a these tests, water in amounts that might cause damage must not have entered the encosure and not have coected in eectricay conductive parts or cabe entries. DKACT.PD.P10.F

20 Pressure contros and thermostats, types KPI and KP 20 DKACT.PD.P10.F1.02 AC-TMP/con