Zelio Conrol measuremen and conrol relays Selecion guide Available nd Quarer 00 Applicaions Curren measuremen a and c Volage measuremen a and c Conrol of Conrol of single-phase -phase supplies supplies Overcurren ndercurren or Overvolage ndervolage or ndervolage overcurren overvolage and overvolage ( conrolled hresholds) Measuremen or conrol Adjusable Adjusable hresholds Adjusable hresholds Adjusable Conrol: hreshold 0.00 A 0.05 5 V hresholds roaional 0.00 A or 0. 5 A or 00 V undervolage: direcion and depending on model or 0 500 V 80 0 V or presence of depending on model 60 0 V phases overvolage: 00 500 V 60 0 V or 0 0 V depending model Supply volage c V z 0 V c V z 0 V Self-powered relays c 0 0 V c 0 0 V c 0 0 V c 0 0 V c 0 0 V c 0 0 V c 0 0 V c 0 0 V c 80 5 V c 80 5 V Number of oupu relay conacs C/O C/O C/O C/O Oupu relay sae Energised when hreshold is exceeded Energised during faul free operaion. De-energised on deecion of a faul. Buil-in ime delay None Adjusable None Adjusable 0.05 o 0 s None 0.05 o 0 s Type M-JA0 M-JA M-A0 M-A M-B M-TG0 Pages /5 /5 / / /5 /8 /8 Te
Available nd Quarer 00 Conrol of -phase supplies Liquid level conrol Conrol: Conrol: Conrol: Measuremen of liquid resisance roaional roaional roaional direcion and presence, by submersible probes direcion and direcion and of phases, presence of presence of asymmery of phases phases, phases, 00 500 V. undervolage undervolage, 00...500 V, overvolage adjusable 00...500 V, hreshold adjusable or fixed hresholds Self-powered relays c V z 0 V c 0 0 V c 0 0 V c 0 0 V c 0 0 V c 80 5 V c 80 5 V C/O C/O C/O C/O C/O Energised during faul free operaion. De-energised on deecion of a faul. Empy funcion: Energised: high elecrode immersed. De-energised: low elecrode no immersed. Fill funcion: Energised: low elecrode no immersed. De-energised: high elecrode immersed. None Adjusable Fixed 0.5 s Adjusable None Adjusable 0. o 0 s 0. o 0 s 0. o 0 s M-T M-T M-TA0 M-TA M-LG0 M-LA /8 /8 /8 /8 /56 /56 Te /9
Curren and volage measuremen relays : pages / o / -phase supply conrol relays : pages / o /9 Single-phase supply conrol relays : pages /50 o /5 Liquid level conrol relays : pages /5 o /57 General characerisics Environmen Conforming o sandards IEC 6055-6, EN 6055-6 Produc approvals è marking CSA, GL, L, pending Zelio Conrol measuremen relays conform o European regulaions relaing o è marking Ambien air emperaure Sorage C - 0 + 85 around he device Operaion C - 0 + 65 Permissible relaive humidiy range Conforming o IEC 607-- 5 85 % Environmenal class K Vibraion resisance Conforming o IEC 6068--6, 0 o 55 Hz a = 0.5 ms Shock resisance Conforming o IEC 6068--7 5 gn - ms Degree of proecion Casing IP 50 Terminals IP 0 Degree of polluion Conforming o IEC 6066- Overvolage caegory Conforming o IEC 6066- III aed insulaion volage Conforming o IEC V 500 Conforming o CSA V () Tes volage for Dielecric es kv.5 insulaion ess Shock wave kv.8 Volage limis Power supply circui 0.85. c () Frequency limis Power supply circui 50/60 ± 5 % Disconnecion value Power supply circui > 0. c () Mouning posiion In relaion o normal verical Any posiion wihou deraing mouning plane Connecion Flexible cable wihou cable end mm x.5 Maximum c.s.a. Flexible cable wih cable end mm x.5 Tighening orque N.m 0.6. Immuniy o elecromagneic inerference (EMC) (Applicaion class conforming o EN 68-) Elecrosaic discharge Conforming o IEC 6000-- Level (6 kv conac, 8 kv air) Elecromagneic fields Conforming o IEC 6000-- Level (0 V/m) Fas ransiens Conforming o IEC 6000-- Level ( kv) Shock waves Conforming o IEC 6000--5 Level ( kv) adiaed and CISP Group class A conduced emissions CISP Class A () Value no communicaed. () Excep M-T, see page /7. /0 Te
Curren and volage measuremen relays : pages / o / -phase supply conrol relays : pages / o /9 Single-phase supply conrol relays : pages /50 o /5 Liquid level conrol relays : pages /5 o /57 General characerisics (coninued) Oupu circui characerisics Mechanical durabiliy In millions of operaing cycles 0 Curren limi Ih A 8 aed operaional limis a 70 C V 5 V 50 V Conforming o IEC 6097-5-/99 and VDE 0660 AC-5 A DC- A 0. 0. Minimum swiching capaciy V/0 ma Swiching volage aed V c 50 Max V c 0 Conac maerial Nickel Silver 90/0 a.c. load d.c. load Curve Curve Load limi curve Elecrical durabiliy of he conacs on a resisive educion facor k for inducive loads load in millions of operaing cycles (applies o values aken from he durabiliy curve opposie) Millions of operaing cycles 0 0, educion facor k 0,9 0,8 0,7 0,6 0,5 0, Volage in V 00 00 00 50 0 0 0 0,0 0, 0 0 5 6 7 8 0,8 0,6 0,5 0, 0, 0, 0, 0, 0,5 5 0 0 Curren broken in A Power facor on breaking (cos ϕ) Curren in A Example: An LC-F85 conacor supplied wih 5 V/50 Hz for a consumpion of 55 VA or a curren consumpion equal o 0. A and cos ϕ = 0. For 0. A, curve indicaes durabiliy of approximaely.5 million operaing cycles. As he load is inducive, i is necessary o apply a reducion coefficien k o his number of cycles, as indicaed by curve. L/ = 0 ms L/ wih load proecion diode esisive load + M For cos ϕ = 0. : k = 0.6 The elecrical durabiliy herefore becomes:.5 0 6 operaing cycles x 0.6 = 900 000 operaing cycles K Te /
Characerisics : page / eferences : page /5 Dimensions, schemes : page /6 Seing-up : page /7 Curren measuremen relays M-JA Presenaion Funcions These devices are designed o deec when a prese curren hreshold is exceeded, on a.c. or d.c. supply. They have a ransparen, hinged flap on heir fron face o preven any accidenal aleraion of he seings. This flap can be direcly sealed. Type of Overcurren Overcurren or Measuring relay conrol undercurren conrol () range M-JA0 Yes No ma A M-JA0 M-JA Yes Yes ma A M-JA Yes Yes 0. A 5 A Applicaions: - exciaion conrol of d.c. machines, - conrol of load sae of moors and generaors, - conrol of curren drawn by a -phase moor, - monioring of heaing or lighing circuis, - conrol of pump draining (undercurren), - conrol of overorque (crushers). - monioring of elecromagneic brakes or cluches. Descripion M-JA M-JA0 M-JA M-JA Widh.5 mm Widh.5 mm Widh 5 mm Adjusmen of curren hreshold as % of seing range max. value. Hyseresis adjusmen from 5 o 0 % (). Fine adjusmen of ime delay as % of seing range max. value. 0-posiion swich combining: - selecion of he iming range: s, s, 0 s, 0 s, no ime delay. - selecion of overcurren (>) or undercurren (<) deecion. See able below. Yellow LED: indicaes relay sae. Green LED: indicaes ha supply o he M is on. Table showing deails for swich Swich Funcion Time delay posiion () < 0 ndercurren deecion No ime delay < ndercurren deecion 0.05 o s < ndercurren deecion 0.5 o s < 0 ndercurren deecion 0.5 o 0 s < 0 ndercurren deecion.5 o 0 s > 0 Overcurren deecion No ime delay > Overcurren deecion 0.05 o s > Overcurren deecion 0.5 o s > 0 Overcurren deecion 0.5 o 0 s > 0 Overcurren deecion.5 o 0 s / Te () Selecion by swich on fron face. () Value of curren difference beween energisaion and de-energisaion of he oupu relay (% of he curren hreshold o be measured).
Curren measuremen relays M-JA eferences : page /5 Dimensions, schemes : page /6 Seing-up : page /7 Presenaion (coninued) Operaing principle The supply volage is conneced o erminals A-A. The curren o be moniored is conneced o erminals B, B, B and C. See diagram below. Hyseresis is adjusable beween 5 and 0 %: for overcurren h = (IS - IS) / IS, for undercurren h = (IS - IS) / IS. A measuring cycle lass only 80 ms, which allows rapid deecion of changes in curren. elay se for overcurren deecion (M-JA0 or selecor on > for model M-JAi). If he curren is greaer han he seing hreshold IS, he oupu relay is energised wih or wihou a ime delay, depending on he model. When he curren reurns o a value IS below he hreshold, depending on he hyseresis seing, he relay is insananeously de-energised. elay se for undercurren deecion (selecor on <, model M-JAi only). If he curren is less han he hreshold seing IS, he oupu relay is energised wih or wihou a ime delay, depending on he model. When he curren reurns o a value IS above he hreshold, depending on he hyseresis seing, he relay is insananeously de-energised. Funcion diagrams: Overcurren deecion supply A-A Funcion > Curren measured elay IS IS 5-8 5-6 5-8 5-6 : ime delay < ndercurren deecion supply Curren measured elay A-A IS IS 5-8 5-6 Funcion < 5-8 5-6 < Measuremen circui B, B, B M-JA drop < V C Load Noe: The measuremen ranges can be exended by means of a curren ransformer, he secondary of which is conneced o he erminals of he corresponding M, or by means of a resisor conneced in parallel wih he measuring inpu (see example page /7 Seing-up ). Te /
Curren measuremen relays M-JA eferences : page /5 Dimensions, schemes : page /6 Seing-up : page /7 Characerisics Power supply circui characerisics Type of relay M-JA0 M-JA and M-JA aed supply c 50/60 Hz V 0...0 0...0...0 0 0 0...0 80...5 volage (n) a V...0 Average c VA.9..7.5.5..9..7..7 consumpion a n a W. Oupu relay and operaing characerisics Type of relay M-JA0 M-JA and M-JA Number of C/O conacs Oupu relay sae Energised when: Energised when: curren measured > hreshold seing curren measured > hreshold seing ( > funcion) curren measured < hreshold seing ( < funcion) Seing accuracy of he As % of he full scale value: ± 5 % swiching hreshold Swiching hreshold drif % 0.06 per degree cenigrade, depending on he permissible ambien emperaure % 0.5, wihin he supply volage range (0.85. n) Hyseresis (adjusable) % 5 0 of he curren hreshold seing Seing accuracy of As % of he full scale value: ± 0 % he ime delay Time delay drif % 0.07 per degree cenigrade, depending on emperaure 0.5, wihin he supply volage range (0.85. n) Measuring cycle ms 80 Measuring inpu characerisics Inernal inpu resisance and permissible overload depending on he curren measuremen ranges Type of relay M-JA0 and M-JA M-JA Measuremen range 0 ma 0 00 ma 0. A 0..5 A 5 A 5 A c 50-60 Hz and a Inernal inpu resisance i Ω 0 0.06 0.0 0.006 Permissible coninuous overload A 0.05 0.5.5 7 0 Permissible non repeiive overload A 0. 0.5 5 0 5 00 for s / Te
Presenaion : pages / and / Characerisics : page / Seing-up : page /7 Curren measuremen relays M-JA eferences Curren measuremen relays: overcurren deecion Available nd Quarer 00 Time delay Curren o be measured Widh Oupu Basic reference. Weigh depending on connecion relay Complee wih code indicaing c or a he volage code () mm kg None...0 ma.5 C/O M-JA0i 0.7 0...00 ma 0... A M-JA0 Curren measuremen relays: overcurren or undercurren deecion Adjusable Curren o be measured Widh Oupu Basic reference. Weigh ime delay depending on connecion relay Complee wih code indicaing c or a he volage code () s mm kg 0.05...0...0 ma.5 C/O M-JAii 0.7 0...00 ma 0... A M-JA 0...5 A 5 C/O M-JAii 0.0...5 A...5 A () Sandard supply volages M-JA0 Vols 0...0 0...0 c 50/60 Hz B F M M-JA Vols...0 0...0 0...0 80...5 and M-JA c 50/60 Hz MW F M Q a MW Te /5
Curren measuremen relays M-JA Presenaion : pages / and / Characerisics : page / Seing-up : page /7 Dimensions, schemes Dimensions Dimensions ail mouning Screw fixing M-JA (common side view) M-JAi M-JA 78 78 80,5 5 89,5 8 Ø 6 78 6 Schemes, connecion Terminal blocks M-JA0 M-JA M-JA A A C B B B A A C B B B A A C B B B B B B C 6 B B B C 6 8 5 6 8 5 B B B C A A A A A A 8 5 6 8 5 6 8 5 8 6 5 8 6 5 8 6 5 8 6 5 8 6 5 A-A Supply volage Connecion and curren values o be measured, depending on ype of M-JA B, B. Currens o be measured M-JA0 B-C 0 ma M-JA B-C 0..5 A B, C (see able opposie) and M-JA B-C 0 00 ma B-C 5 A B-C 0. A B-C 5 A Applicaion schemes Example: deecion of blockage on a crusher (overcurren funcion) Curren measured 5 A Curren measured > 5 A 6 /L /L 5/L Q 5 Q KM /T /T 6/T 5 B C M-JA 6 5 8 6 5 8 Sop A A 6 /L /L 5/L Q 5 6 Q KM /T /T 6/T 5 B C M-JA 6 5 8 6 5 8 Sop A A 6 V W Overorque Sar KM V W Overorque Sar KM M N KM M N KM /6 Te
Presenaion : pages / and / Characerisics : page / eferences : page /5 Dimensions, schemes : page /6 Curren measuremen relays M-JA Seing-up Example of overcurren o be measured Overcurren hreshold a: A. Oupu relay ime delay: 5 s. ese curren hreshold: A. Supply volage: 7 V a. i Produc seleced M-JAMW Connecion of curren o be measured B-C ( o 5 A) Adjusmens: i Adjusmen of funcion and iming range, swich : - deermine wheher overcurren or undercurren deecion is required; in his example, overcurren. - deermine he iming range, immediaely greaer han he ime required; in his example, 0 s. - posiion swich according o he above crieria; in his example, swich on > 0. i Fine adjusmen of ime delay: Depending on he max. range seing displayed a (in his example: 0 s) use poeniomeer o se he required ime delay as a % of value. In his example, he required ime = 5 s herefore : x 00 = 5 x 00 = 50 % Se he ime delay poeniomeer o 50. 0 i Se he curren hreshold seing poeniomeer as a percenage of he maximum value of he measuring range seleced when wiring. In his example: wiring B-C, max. value of measuring range = 5 A, herefore: Seing = x 00 = 87 % Se he curren hreshold seing poeniomeer o 87. 5 i Se he hyseresis as a % of he hreshold value; in his example: Seing = - = 5. % Se he hyseresis o 5 ( - = i.e. 5. % of he curren o be measured). Exension of he measuring range M-JA i B C Im I s d.c. or a.c. supply Simply connec a resisor s o erminals B-C (or B, B-C) on he measuring inpu. The relay energisaion hreshold will be owards he middle of he seing poeniomeer range if he value of s is in he region of: s = i where : i Inernal resisance of inpu B-C. (I/Im) - Im Maximum value of hreshold seing range. I Curren hreshold o be measured. Power dissipaed by s: P = s (I -Im/) Applicaion: se of relay M-JAii (0 o 00 ma). Connecion B-C o measure a hreshold of A, knowing ha i = 0 Ω for his raing and ha Im = 00 ma 0 The value of s will be: = 0.56 Ω ( x /0.) - 0. P = ( - ) x 0.56 i.e. 0.7 W Selec a resisor s capable of dissipaing a leas wice he calculaed value, i.e. W for his example, in order o limi emperaure rise. On an a.c. supply, i is also possible o use a curren ransformer. Te /7
Characerisics: page /0 eferences: page / Dimensions, schemes: page / Seing-up: page / Volage measuremen relays M-A Presenaion Funcions These devices are designed o deec when a prese volage hreshold is exceeded, on a.c. or d.c. supply. They have a ransparen, hinged flap on heir fron face o preven any accidenal aleraion of he seings. This flap can be direcly sealed. Type of Overvolage Overvolage or Measuring relay conrol undervolage conrol () range M-A0i Yes No 50 mv 500 V M-A0 M-Ai Yes Yes 50 mv 500 V Applicaions: - d.c. moor overspeed conrol, - baery monioring, - monioring of a.c. or d.c. supplies, - speed monioring (wih acho-generaor). Presenaion M-A0i Widh.5 mm M-Ai Widh.5 mm Adjusmen of volage hreshold as % of seing range max. value. Hyseresis adjusmen from 5 o 0 % (). Adjusmen of ime delay as % of seing range max. value. Swich combining: - selecion of he iming range: s, s, 0s, 0s, no ime delay, - selecion of overvolage (>) or undervolage (<) deecion. See able below. Yellow LED: indicaes relay sae. Green LED: indicaes ha supply o he M is on. Table showing deails for swich Swich Funcion Time delay posiion () < 0 ndervolage deecion No ime delay < ndervolage deecion 0.05 o s < ndervolage deecion 0.5 o s < 0 ndervolage deecion 0.5 o 0 s < 0 ndervolage deecion.5 o 0 s > 0 Overvolage deecion No ime delay > Overvolage deecion 0.05 o s > Overvolage deecion 0.5 o s > 0 Overvolage deecion 0.5 o 0 s > 0 Overvolage deecion.5 o 0 s /8 Te () Selecion by swich on fron face. () Value of volage difference beween energisaion and de-energisaion of he oupu relay (% of he volage hreshold o be measured).
Characerisics: page /0 eferences: page / Dimensions, schemes: page / Seing-up: page / Volage measuremen relays M-A Presenaion (coninued) Operaing principle The supply volage is conneced o erminals A-A. The volage o be moniored is conneced o erminals B, B or B and C. Hyseresis is adjusable beween 5 and 0 %: for overvolage h = (S - S) / S, for undervolage h = (S - S) / S. A measuremen cycle lass only 80 ms, which allows rapid deecion of changes in volage. elays se for overvolage deecion (M-A0i or selecor on > for model M-Ai): If he volage is greaer han he hreshold seing S, he oupu relay is energised, wih or wihou a ime delay. When he volage reurns o a value S below he hreshold, depending on he hyseresis seing, he relay is insananeously de-energised. elays se for undervolage deecion (selecor on <, model M-Ai only): If he volage is less han he hreshold seing S, he oupu relay is energised, wih or wihou a ime delay. When he volage reurns o a value S above he hreshold, depending on he hyseresis seing, he relay is de-energised. Funcion diagrams Overvolage conrol supply A-A Funcion > Volage measured elay : ime delay S S 5-8 5-6 5-8 5-6 < ndervolage conrol supply A-A Volage measured elay S S 5-8 5-6 5-8 5-6 Funcion < < Noe: he measuremen ranges can be exended above 500 V by adding a resisor, see page /. The measuremen range on c supply can be exended by means of a volage ransformer, he secondary of which is conneced o he measuring erminals of he corresponding M. Te /9
Presenaion: pages /8 and /9 eferences: page / Dimensions, schemes: page / Seing-up: page / Volage measuremen relays M-A Characerisics Power supply circui characerisics Type of relay M-A0i M-Ai aed supply c 50/60 Hz V 0...0 0...0...0 0 0 0...0 80...5 volage (n) a V...0 Average c VA.9..7.5.5..9..7..7 consumpion a n a W. Oupu relay and operaing characerisics Type of relay M-A0i M-Ai Number of C/O conacs Oupu relay sae Energised when: Energised when: volage measured > hreshold seing volage measured > hreshold seing ( > funcion ) volage measured < hreshold seing ( < funcion) Seing accuracy of he As % of he full scale value: ± 5 % swiching hreshold Swiching hreshold drif % 0.06 per degree cenigrade, depending on he permissible ambien emperaure % 0.5, wihin he supply volage range (0.85. n) Hyseresis (adjusable) % 5 0 of he volage hreshold seing Seing accuracy of As % of he full scale value: ± 0 % he ime delay Time delay drif % 0.5, wihin he supply volage range (0.85. n) 0.07 per degree cenigrade, depending on he raed operaing emperaure Measuring cycle ms 80 Measuring inpu characerisics Inernal inpu resisance and permissible overload depending on he curren measuremen ranges Type of relay M-Ai M-Ai M-Ai Measuremen range V 0.05 0.5 0. 0.5 5 0 5 50 0 00 0 00 50 500 c 50-60 Hz and a Inernal inpu resisance i kω 6.6 7 5 668 Permissible coninuous overload V 0 60 80 90 50 00 00 550 Permissible non repeiive overload V 5 80 00 00 00 00 500 550 for s /0 Te
Presenaion: pages /8 and /9 Characerisics: page /0 Dimensions, schemes: page / Seing-up: page / Volage measuremen relays M-A eferences Volage measuremen relays: overvolage deecion Available nd Quarer 00 Time delay Volage o be measured Widh Oupu Basic reference. Weigh depending on connecion relay Complee wih code indicaing c or a he volage code () V mm kg None 0.05...0.5.5 C/O M-A0i 0.68 0. 0.5 5 M-A0...0.5 C/O M-A0i 0.68 5 50 0 00 0...00.5 C/O M-A0i 0.68 50 500 Volage measuremen relays: overvolage or undervolage deecion Adjusable Volage o be measured Widh Oupu Basic reference. Weigh ime delay depending on connecion relay Complee wih code indicaing c or a he volage code () s V mm kg 0.05...0 0.05...0.5.5 C/O M-Aii 0.68 0. 0.5 5...0.5 C/O M-Aii 0.68 5 50 0 00 0...00.5 C/O M-Aii 0.68 50 500 () Sandard supply volages M-A0i Vols 0...0 0...0 c 50/60 Hz B F M M-JAi Vols...0 0...0 0...0 80...5 c 50/60 Hz MW F M Q a MW Te /
Presenaion: pages /8 and /9 Characerisics: page /0 eferences: page / Seing-up: page / Volage measuremen relays M-A Dimensions, schemes Dimensions Dimensions ail mouning Screw fixing M-A 78 80,5 89,5 8 Ø 6 78 6 Schemes, connecion Terminal blocks M-A0, A0 M-A0 M-A, A M-A A A C B B B A A C B B A A C B B B A A C B B B B B C 6 8 5 B C B 6 8 5 B B B C A 6 8 5 A 6 8 5 B C A B A 6 8 5 8 6 5 8 6 5 8 6 5 A-A Supply volage Connecion and volage values o be measured, depending on ype of M-A B, B. Volages o be measured M-Ai B-C 0.05 0.5 V M-Ai B-C 0 V M-Ai B-C 0 00 V B, C (see able opposie) B-C 0. V B-C 5 50 V B-C 50 500 V B-C 0.5 5 V B-C 0 00 V Applicaion scheme Example: overspeed monioring (undervolage funcion) /L /L 5/L 6 Q 6 5 Q Q Q A A M-A 6 5 8 6 5 8 B C v Tachogeneraor KM V 6 A A A 8 5 A 8 6 5 8 6 5 8 6 5 Sop W Overspeed Sar KM M KM / Te
Presenaion: pages /8 and /9 Characerisics: page /0 eferences: page / Dimensions, schemes: page / Volage measuremen relays M-A Seing-up Example of undervolage o be measured ndervolage hreshold o be measured: V a. Time delay of he oupu relay: 0 s. ese volage hreshold:. V. Supply volage: 0 V c 60 Hz. i Produc seleced M-AM Connecion of volage o be measured B-C (5 o 50 V) Adjusmens: i Adjusmen of funcion and iming range, swich : - deermine he iming range, immediaely greaer han he ime required, in his example 0 s. - deermine wheher overvolage or undervolage deecion is required, in his example undervolage. - posiion swich according o he above crieria, in his example, swich on < 0. i Fine adjusmen of ime delay: Depending on he max. range seing displayed a (in his example: 0 s) use poeniomeer o se he required ime delay as a % of value. In his example, he required ime = 0 s herefore: x 00 = 0 x 00 = 66 % Se he ime delay poeniomeer o 66. 0 i Se he volage hreshold seing poeniomeer as a percenage of he maximum value of he measuring range seleced when wiring. In his example: wiring B-C, max. value of measuring range = 50 V, herefore: Seing = x 00 = % Se he volage hreshold seing poeniomeer o. 50 i Se he hyseresis as a % of he hreshold value; in his example: Seing =. - = 0 % Se he hyseresis o 0. Exension of he measuring range M-A C s d.c. or a.c. supply Simply connec an addiional resisor (s) in series wih he measuring inpu B or C. If he value of s is in he region of: i B > 500 V s = i ( - ) where: i Inernal resisance of inpu B-C. m m Maximum value of hreshold seing range. Volage hreshold o be measured. The ripping hreshold of he relay will be owards he maximum graduaion on he hreshold seing poeniomeer. In general, he power consumed by he resisor does no exceed 0.5 W. For a.c. volages, i is also possible o use a volage ransformer. Supply by he measured volage For monioring mains and power supplies, he M-A can be supplied by he volage o be conrolled, provided ha: A A B/B M-A C - he measuremen hreshold is wihin he operaing range of he produc's power supply (0.85. c). - variaions of he volage o be measured are compaible wih he supply and measuremen volage ranges. Te /
-phase supply conrol relays M-T Characerisics : page /7 eferences : page /8 Dimensions, schemes : page /9 Presenaion Funcions M-T These devices are designed o monior -phase supplies and o proec moors and oher loads agains he fauls lised in he able below. They have a ransparen, hinged flap on heir fron face o preven any accidenal aleraion of he seings. This flap can be direcly sealed. M-TG M-T M-T M-TA Monioring of roaional direcion of phases Deecion of complee failure of one or more of he phases ndervolage deecion Overvolage and undervolage deecion ( hresholds) Deecion of phase asymmery (imbalance) Funcion performed Funcion no performed Applicaions i Conrol for connecion of moving equipmen (sie equipmen, agriculural equipmen, refrigeraed rucks). i Conrol for proecion of persons and equipmen agains he consequences of reverse running (lifing, handling, elevaors, escalaors, ec.). i Conrol of sensiive -phase supplies. i Proecion agains he risk of a driving load (phase failure). i Normal/emergency power supply swiching. Presenaion M-TG M-T < Yellow LED: indicaes relay oupu sae. Yellow LED: indicaes relay oupu sae. < ed LED: undervolage faul. ndervolage seing poeniomeer. M-T. M-T. M-TA M-TA0 M-T M-T > < P > A < P P / Te Time delay funcion selecor: Asymmery hreshold seing poeniomeer, from 5 o 5 % Faul deecion delayed. Poeniomeer for seing ime delay, 0. o 0 s. Faul deecion exended. Yellow LED: indicaes relay sae. Poeniomeer for seing ime delay in seconds. Green LED: indicaes ha supply o he M is on. Poeniomeer for seing overvolage as a A ed LED: phase asymmery. direc value. P ed LED: phase failure or incorrec roaional Poeniomeer for seing undervolage as a direcion of phases. direc value. Yellow LED: indicaes relay sae. Green LED: indicaes ha supply o he M is on. > ed LED: overvolage faul < ed LED: undervolage faul P ed LED: phase failure or incorrec roaional direcion of phases.
-phase supply conrol relays M-T Characerisics : page /7 eferences : page /8 Dimensions, schemes : page /9 Presenaion (coninued) Operaing principle The supply volage o be moniored is conneced o erminals L, L, L of he produc. There is no need o provide a separae power supply for M-T relays; hey are self-powered by erminals L, L, L. i Monioring roaional direcion of phases and deecion of complee failure of one of more of he phases (M-T all models) When erminals L, L, L are energised, he relay is energised and he yellow LED comes on if he roaional direcion of phases is correc and if all phases are presen. If one or more of he phases have failed or if he roaional direcion is incorrec, he relay is no energised a swichon. In normal operaion (no faul) he relay is energised; i de-energises insananeously in he even of failure of one or more of he phases (any ime delay se is no acive on hese fauls). In he even of failure or absence of a single phase, a volage greaer han he deecion hreshold ( 0 V on M-TG, undervolage hreshold seing on M-T and M-T) can be generaed back hrough he conrol circui, hus prevening deecion of he phase failure. In his case, we recommend he use of M-TA relays. The absence of a phase is signalled, on M-T and M-TA, by illuminaion of led P. i Overvolage and undervolage deecion (M-T): In normal operaion, he relay is energised and LEDs and are illuminaed. If he average of he volages beween phases goes ouside he range o be moniored, he oupu relay is deenergised: - overvolage: he ed LED > illuminaes. - undervolage: he ed LED < illuminaes. When he supply reurns owards is raed value, he relay is re-energised according o he hyseresis value (5%) and he corresponding red LED goes ou. A selecor swich allows selecion of an adjusable ime delay from 0. s o 0 s. Wih funcion ransien over or under volages are no aken ino accoun. Wih funcion all variaions above or below are aken ino accoun and re-energisaion of he relay is delayed. In all cases, in order o be deeced, he duraion of he overvolage or undervolage mus be greaer han he measuring cycle ime (80 ms). Funcion diagram (M-T, M-T) M-T M-T Seing > 0.95 x Seing > <.05 x Seing < Seing < L L L < 0 Vol Funcion 5/8 5/8 5/6 5/6 Funcion 5/8 5/8 5/6 5/6 : ime delay Funcion diagram (M-T, M-T) M-T M-T T T V 0 V 0 V 8 V < 08 V 78 V 98 V 60 V L L L < 0 Vol Funcion 5/8 5/8 5/6 5/6 Funcion 5/8 5/8 5/6 5/6 : ime delay Te /5
-phase supply conrol relays M-T Characerisics : page /7 eferences : page /8 Dimensions, schemes : page /9 Presenaion (coninued) Operaing principle (coninued) i ndervolage deecion only (M-T) In normal operaion, he oupu relay is energised and he yellow LED is illuminaed. If he average of he volages beween phases is less han he undervolage hreshold seing, he relay is deenergised afer 550 ms and he red LED < illuminaes. Funcion diagram.05 x Seing < Seing < L L L < 0 vol 5/8 5/8 5/6 5/6 : fixed ime delay = 550 ms i Deecion of phase asymmery (M-TA) In normal operaion, he oupu relay is energised and he yellow and green LEDs are illuminaed. In he even of an asymmery faul, afer a ime delay se beween 0. s and 0 s (on M-TA only), he oupu relay is de-energised, he yellow LED goes ou and red LED A illuminaes (M-TAi only). The relay re-energises when he asymmery value measured is less han half of he asymmery value seing (hyseresis). Funcion diagram L L L L L L L L L Asymmery > se hreshold Asymmery > se hreshold elay 5-8 5-6 5-8 5-6 : ime delay Example: asymmery se a 0 %, mains supply volage 00 V - relay de-energisaion hreshold: 00-0 % = 60 V. 0 % - relay re-energisaion hreshold: 00 V = 80 V. /6 Te
-phase supply conrol relays M-T Presenaion : pages / o /6 eferences : page /8 Dimensions, schemes : page /9 Characerisics Type of relay M-TG M-T M-T M-TA Oupu relay and operaing characerisics Number of C/O conacs M-TAi: M-TA0i: Oupu relay sae Energised during Energised during Energised during Energised during faul free faul free faul free faul free operaion. operaion. operaion. operaion. De-energised or De-energised on De-energised on De-energised on unable o deecion of deecion of deecion of energise on undervolage or overvolage, asymmery deecion of roaional direcion undervolage or faul, phase roaional direcion faul or roaional failure or faul or failure of failure of one or direcion faul or roaional one or more more phases phase failure direcion faul phases Accuracy of swiching As % of he se value ± % ± % ± % hreshold seing Swiching hreshold drif Depending on he 0.06 % per 0.06 % per 0.06 % per permissible ambien degree cenigrade degree cenigrade degree cenigrade emperaure Wihin he 0.5 % 0.5 % 0.5 % measuring range Accuracy of ime delay As % of he full scale ± 0 % ± 0 % ± 0 % seing value Time delay drif Wihin he 0.5 % 0.5 % 0.5 % measuring range Depending on he 0.07 % per 0.07 % per 0.07 % per raed operaional degree cenigrade degree cenigrade degree cenigrade emperaure Hyseresis Fixed Abou 5 % of he Abou 5 % of he Abou 50 % of he de-energisaion de-energisaion asymmery hreshold hreshold percenage Measuring cycle ms 80 80 80 80 Measuring inpu characerisics Minimum operaional volage () L L V 0 M-T0: 60 M-T, M-TA0, or M-T: 60 M-TA: 60 L L or M-T0: 90 M-T, M-TA0, L L M-T: 90 M-TA: 90 Maximum permissible L L L V 580 M-T0: 00 M-T, M-TA0, volage beween phases M-T: 00 M-TA: 00 M-T0: 580 M-T, M-TA0, M-T: 580 M-TA: 580 () Minimum volage required for operaion of indicaors and of he ime delay. Te /7
-phase supply conrol relays M-T Presenaion : pages / o /6 Characerisics : page /7 Dimensions, schemes : page /9 eferences Conrol relays: roaional direcion and presence of phases Time delay aed Widh Oupu eference Weigh mains supply relay volage () s V mm kg None 00...500.5 C/O M-TG0 0.0 50/60 Hz Conrol relays: roaional direcion and presence of phases + undervolage M-TG0 Time delay aed Conrol Widh Oupu eference Weigh mains supply hreshold relay volage () s V V mm kg None 00 0 ndervolage.5 C/O M-T0 0.0 50/60 Hz 60 0 80 500 ndervolage.5 C/O M-T0 0.0 50/60 Hz 00 0 Conrol relays: roaional direcion and presence of phases + overvolage and undervolage elays wih fixed volage hresholds Adjusable aed Conrol Widh Oupu eference Weigh ime delay mains supply hreshold relay volage () s V V mm kg 0...0 0 ndervolage.5 C/O M-T 0.0 50/60 Hz 98 Overvolage 00 ndervolage.5 C/O M-T 0.0 50/60 Hz 60 Overvolage 0 M-T elays wih adjusable volage hresholds Adjusable aed Conrol Widh Oupu eference Weigh ime delay mains supply hreshold relay volage () s V V mm kg 0. 0 00 0 ndervolage.5 C/O M-T 0.0 50/60 Hz 60 0 Overvolage 0 00 80 500 ndervolage.5 C/O M-T 0.0 50/60 Hz 00 0 Overvolage 0 580 Conrol relays: roaional direcion and presence of phases + asymmery Time delay aed Conrol Widh Oupu eference Weigh on mains supply hreshold relay de-energisaion volage () s V % mm kg Fixed 00...0 Asymmery.5 C/O M-TA0 0.0 0.5 50/60 Hz 5 5 80 500 Asymmery.5 C/O M-TA0 0.0 50/60 Hz 5 5 Adjusable 00...0 Asymmery.5 C/O M-TA 0.0 0. 0 50/60 Hz 5 5 M-TA0 /8 Te 80...500 Asymmery.5 C/O M-TA 0.0 50/60 Hz 5 5 () Can be used on oher supply volages provided ha he minimum operaional volages, maximum volage beween phases and compaibiliy wih he conrol hreshold ranges are complied wih, see page /7.
-phase supply conrol relays M-T Presenaion : pages / o /6 Characerisics : page /7 eferences : page /8 Dimensions, schemes Dimensions ail mouning Screw fixing M-T 78 80,5 89,5 8 Ø Schemes, connecion Terminal blocks M-TG0, T0i M-Ti, TAi M-TA0i 6 78 6 L L L L L L L L L L L L 6 () 8 5 () () 6 () 8 5 () () 8 () 5 () 6 () 8 () 5 () 6 () L L L 6 8 5 6 8 5 8 5 6 8 5 6 L L L 6 8 5 8 5 6 L, L, L Supply o be moniored L, L, L Supply o be moniored L, L, L Supply o be moniored 5()-8() s C/O conac 5-8 s C/O conac 5-8 s C/O conac 5()-6() of he oupu relay 5-6 of he oupu relay 5-6 of he oupu relay 5()-8() nd C/O conac 5-8 nd C/O conac 5()-6() of he oupu relay 5-6 of he oupu relay Applicaion scheme Example /L /L 5/L Q 6 5 L L L M-T 6 5 8 6 5 8 Q Sop Faul Sar KM /T /T 6/T KM KM 5 N V W 6 M Te /9
Single-phase supply conrol relays M-B Characerisics : page /5 eferences : page /5 Dimensions, schemes : page /5 Presenaion Funcions These devices are designed for monioring single-phase mains and power supplies. They have a ransparen, hinged flap on heir fron face o preven any accidenal aleraion of he seings. The flap can be direcly sealed. Applicaions M-B - Proecion of elecronic or elecromechanical devices agains overvolage and undervolage. - Normal/emergency power supply swiching. Presenaion M-B > < Overvolage seing poeniomeer. ndervolage seing poeniomeer. Time delay funcion selecor: Faul deecion delayed. Faul deecion exended. Poeniomeer for seing ime delay in seconds. Yellow LED: indicaes relay sae. Green LED: indicaes ha supply o he M is on. > ed LED: overvolage faul < ed LED: undervolage faul Operaing principle The supply volage o be moniored is conneced o erminals L, L of he produc. There is no need o provide a separae power supply for M-B relays; hey are self-powered by erminals L, L, L. If he volage goes ouside he range o be moniored, he oupu relay is de-energised: - overvolage: red LED > illuminaes. - undervolage: red LED < illuminaes. When he supply reurns owards is raed value, he relay is re-energised according o he hyseresis value (5%) and he corresponding red LED goes ou. A selecor swich allows selecion of an adjusable ime delay from 0. s o 0 s. Wih funcion, ransien over or under volages are no aken ino accoun. Wih funcion, all variaions above or below are aken ino accoun and re-energisaion of he relay is delayed. In all cases, in order o be deeced, he duraion of he overvolage or undervolage mus be greaer han he measuring cycle ime (80 ms). Funcion diagram M-B M-B5 Seing > 0.95 x Seing > <.05 x Seing < Seing < L L < 0 Vol Funcion 5/8 5/8 5/6 5/6 Funcion 5/8 5/8 5/6 5/6 /50 Te : ime delay
Single-phase supply conrol relays M-B Presenaion : page /50 eferences : page /5 Dimensions, schemes : page /5 Characerisics Oupu relay and operaional characerisics Number of C/O conacs Oupu relay sae Energised during faul free operaion. De-energised on deecion of an overvolage or undervolage faul. Seing accuracy of As % of he seing value ± % swiching hreshold Swiching hreshold drif Depending on he 0.06 % per degree cenigrade permissible ambien emperaure Wihin he 0.5 % measuring range Accuracy of ime delay As % of he full scale ± 0 % seing value Time delay drif Wihin he 0.5 % measuring range Depending on he raed operaional emperaure 0.07 % per degree cenigrade Hyseresis Fixed Abou 5 % of he de-energisaion hreshold Measuring cycle ms 80 Measuring inpu characerisics Minimum operaional volage V M-B: 60 M-B5: 60 Maximum permissible V M-B: 00 volage beween L and L M-B5: 00 Te /5
Presenaion : page /50 Characerisics : page /50 Dimensions, schemes : page /5 Single-phase supply conrol relays M-B eferences elays wih adjusable hresholds Available nd Quarer 00 Adjusable aed Conrol Widh Oupu eference Weigh ime delay mains supply hreshold relay volage () s V V mm kg 0. 0 00 00 ndervolage.5 C/O M-B 0.0 50/60 Hz 80 0 Overvolage 60 0 M-B 80 70 ndervolage.5 C/O M-B5 0.0 50/60 Hz 60 0 Overvolage 0 00 () Can be used on oher supply volages provided ha he minimum operaional volages, maximum volage beween phases and compaibiliy wih he conrol hreshold ranges are complied wih, see page /5. /5 Te
Single-phase supply conrol relays M-B Presenaion : page /50 Characerisics : page /5 eferences : page /5 Dimensions, schemes Dimensions ail mouning Screw fixing M-B Scheme, connecion Terminal block M-B 78 80,5 89,5 8 Ø 6 78 6 L L L L 6 8 5 6 8 5 8 5 6 8 5 6 L, L Supply o be moniored 5-8 s C/O conac 5-6 of he oupu relay 5-8 nd C/O conac 5-6 of he oupu relay Applicaion scheme Example Q /L /L 5/L 6 Q Q Q L L M-B 6 5 8 To sensiive loads Te /5
Characerisics : page /56 eferences : page /56 Dimensions : page /57 Seing-up : page /57 Liquid level conrol relays Presenaion Funcions These devices monior he levels of conducive liquids. They conrol he acuaion of pumps or valves o regulae levels, and are also suiable for proecing submersible pumps agains running empy, or proecing anks from overflow. They can also be used o conrol dosing of liquids in mixing processes and o proec heaing elemens in he even of non immersion. They have a ransparen, hinged flap on heir fron face o preven any accidenal alernaion of he seings. This flap can be direcly sealed. M-LG0 i Compaible liquids: - spring, own, indusrial and sea waer, - meallic, acid or basic sal soluions, - liquid ferilizers, - non concenraed alcohol (< 0 %), - liquids in he food processing indusry: milk, beer, coffee, ec. i Non-compaible liquids: - chemically pure waer, - fuels, liquid gasses (inflammable), - oil, concenraed alcohol (> 0 %), - ehylene, glycol, paraffin, varnish and pains. Descripion M-LG0 Widh.5 mm M-LA Widh.5 mm M-LA Fine adjusmen of ime delay (as % of maximum value of seing range). Fine adjusmen of response sensiiviy (as % of maximum value of seing range). Funcion selecor swich: - empy or fill. Swich combining: - selecion of he response sensiiviy range, - selecion of ime delay on energisaion or on de-energisaion of he relay. Yellow LED: indicaes relay sae. Green LED: indicaes ha supply o he M is on Table showing deails for swich Swich Time delay Sensiiviy posiion 500 On-delay High = 500 kω range 500 Off-delay High = 500 kω range 50 On-delay Medium = 50 kω range 50 Off-delay Medium = 50 kω range 5 On-delay Low = 5 kω range 5 Off-delay Low = 5 kω range /5 Te
Characerisics : page /56 eferences : page /56 Dimensions : pages /57 Seing-up : page /57 Liquid level conrol relays Presenaion (coninued) Operaing principle The operaing principle is based on a change in he resisance measured beween immersed or non immersed elecrodes. Low resisance beween elecrodes: liquid presen. High resisance beween elecrodes: no liquid presen. The elecrodes may be replaced by oher sensors or probes which ransmi values represening variaions in resisance. The a.c. measuring volage, which is < 0 V and galvanically insulaed from he supply and conac circuis, ensures safe use and he absence of any elecrolysis phenomena. M-L relays may be used: i For deecion of a liquid level, operaing wih elecrodes, one reference elecrode and one high level elecrode, or an LA9-M0 probe. Example: prevenion of ank overflow. i For regulaing a liquid level beween a minimum and a maximum level, operaing wih elecrodes, or an LA9-M0 probe. Example: waer ower. The sae of he oupu relay can be configured: i Empy funcion : he oupu relay is energised when high level elecrode B is immersed and is de-energised when low level elecrode B is dry (). i Fill funcion : he oupu relay is energised when he low level elecrode is dry and is de-energised when he high level elecrode is immersed (). On model M-LA, a ime delay can be se on energisaion or de-energisaion of he oupu relay in order o raise he maximum level (funcion ) or o lower he minimum level (funcion ). This funcion also makes i possible o avoid pulsing of he oupu relay (wave effec) when operaing wih elecrodes. Empy funcion, maximum level deecion ( elecrodes or probe LA9-M0) B B B B B B Type M- Funcion swich Time delay swich supply A/A LG0 5/8 5/6 LA 5/8 5/8 5/6 5/6 LA 5/8 5/8 5/6 5/6 Empy funcion, regulaion beween a maximum and a minimum level ( elecrodes or probes LA9-M0) B B B B B B B B B B B B Type M- Funcion swich Time delay swich supply A/A LG0 5/8 5/6 LA 5/8 5/8 5/6 5/6 LA 5/8 5/8 5/6 5/6 Fill funcion, maximum level deecion ( elecrodes or probe LA9-M0) B B B B B B Type M- Funcion swich Time delay swich supply A/A LG0 5/8 5/6 LA 5/8 5/8 5/6 5/6 LA 5/8 5/8 5/6 5/6 Empy funcion, regulaion beween a maximum and a minimum level ( elecrodes or probes LA9-M0) B B B B B B B B B B B B Type M- Funcion swich Time delay swich supply A/A LG0 5/8 5/6 LA 5/8 5/8 5/6 5/6 LA 5/8 5/8 5/6 5/6 B: reference elecrode B: high level elecrode B: low level elecrode () When operaing wih elecrodes, he high level elecrode performs boh high and low level funcions. Te /55
Presenaion : pages /5 and /55 Dimensions : page /57 Seing-up : page /57 Liquid level conrol relays Characerisics, references Available nd Quarer 00 Type of relay M-LG0 M-LA Power supply circui characerisics aed supply c 50/60 Hz V 0...0 0...0 80...5...0 0...0 0...0 80...5 volage (n) a V...0 Average c VA.9.6..9.7..7.6. consumpion a n a W. Oupu relay and operaing characerisics Number of C/O conacs Oupu relay sae Can be configured by swich: empy /fill Elecrode circui characerisics () Sensiiviy scale kω 5 00 (adjusable) 0.5 5.5 50 5 500 Maximum a.c. elecrode V volage (peak o peak) Maximum curren in ma he elecrodes Maximum cable capaciy nf 0 00 5 Maximum cable lengh m 00 000 00 0 eferences Liquid level conrol relays Time delay Sensiiviy Widh Oupu Basic reference. Weigh scale relay Complee wih code indicaing he volage () kω mm kg None 5 00.5 C/O M-LG0i 0.65 M-LG0 Adjusable 0.5...5.5 C/O M-LAii 0.65 0...0 s.5...50 5...500 Liquid level conrol probe Type of insallaion Maximum operaing eference Weigh emperaure C kg M-LA Suspended by cable 00 LA9-M0 0.00 LA9-M0 /56 Te () The elecrodes may also be incorporaed in he probes. The probes are normally designed for fixing o a ank by means of a bracke wih a seal (closed anks) or suspended by heir own elecrical connecing cable (boreholes, ec.). See page /57 Seing-up Probe LA9-M0. () Sandard supply volages M-LG0 Vols 0...0 0...0 80...5 c 50/60 Hz B F M Q M-LA Vols...0 0...0 0...0 80...5 c 50/60 Hz MW B F M Q a MW
Zelio conrol - measuremen and conrol relays Liquid level conrol relays Presenaion : pages /5 and /55 Characerisics : page /56 eferences : page /56 Dimensions, schemes, seing-up Dimensions ail mouning Screw fixing M-LG0, LA 80,5 89,5 8 Probe LA9-M0 78 6 78 6 Ø Schemes, connecion M-LG0 50 6 M-LA A 5 B B B B B B 6 8 5 A A 8 6 A Seing-up B A A 5 B B B B A 6 8 5 6 5 B 8 6 8 6 A 8 5 A-A Supply volage Elecrodes and level conrolled B, B, B Elecrodes (see able opposie) B eference or ank earh 5-8 s C/O conac elecrode 5-6 of he oupu relay 5-8 nd C/O conac B High level 5-6 of he oupu relay B Low level M-LG0 M-LA i Selec he empy /fill funcion according o he sequence o be performed. i If necessary, se poeniomeer o minimum (ime delay). i Se poeniomeer o minimum; on M-LA selec he lowes sensiiviy range using poeniomeer (5 or 5 ). i Wih all he elecrodes immersed, urn he sensiiviy poeniomeer owards maximum unil he relay is energised ( funcion) or de-energised ( funcion), hen exceed he hreshold by abou 0 % o compensae for variaion in he supply volage. If he relay is no able o energise, a higher sensiiviy scale mus be used (selecor on M-LA) or relay M-LG mus be replaced by an M-LA relay and he adjusmen procedure mus be sared again. i Then check ha he relay de-energises ( funcion) or energises ( funcion) as soon as elecrodes B and B are ou of he liquid. If he relay does no de-energise, selec a lower sensiiviy scale. i The elecrode connecion poin mus be proeced agains corrosion by sicking or sealing. In areas where hundersorms are likely o occur, measures mus also be aken o proec he elecrode lines. Noe: he high level can be raised by means of he adjusable ime delay from 0. o 0 seconds wih funcion. The low level can be lowered by means of his same ime delay wih funcion. -conducor cable in cylindrical sheah (max.ø 6. mm) Level elecrode eference elecrode (skir) Probe LA9-M0 This probe is of he suspended ype. I is coaxial, i.e. in addiion o he normal (cenral) elecrode, he sainless seel skir can also ac as earh (reference) elecrode, which means ha here is no need o insall a separae reference probe. In his way, for conrolling one level, only one probe is required insead of ; for conrolling levels, only probes are required insead of. The connecing cable mus be of he -conducor ype, wih common cylindrical PVC sheah, having a maximum diameer of 6. mm. The skir also acs as a calming chamber, so avoiding inaccuracy due o an agiaed surface of he liquid (waves). Maximum operaing emperaure: 00 C. Probe LA9-M0 can also be fixed on various conainers (ciserns, anks,...) by means of a bracke or oher suiable fixing device. LA9-M0 Connecion examples Conrol by elecrodes Conrol by probes Supply volage A B B B B B B A High level Low level M-LG0 B B B B B levels level Te /57