> Resin Cast Outdoor & Indoor Instrument Transformer << www.energypac-bd.com. HiEnergypac: Energypac Engineering Limited.The latest invention of ENERGYPAC ENGINEERING LTD. (EEL) is Resin Cast Outdoor & Indoor Instrument Transformer. The hydrophobic & cycloaliphatic Resin Cast Instrument Transformer is completely suitable for outdoor application. This special epoxy resin system got outstanding features that can greatly ensure the high class performance & reliabilities, to ensures very high mechanical and die-electrical properties, good thermal shock resistance, high resistance to erosion under ultra-violet radiation and high tracking and arc resistance in dificult climatic conditions. Energypac supplied several sets of CT/PT's ofthis kind to different power plants & industries. These ate running very smoothly. The basic design ofthis CI/PT's are based on ANSI/IEEE/IEC standards ‘The company has passed 150 9000 & 14000 quality system certification, meet the requirement of ANSI C57.13 and Type Test certification set down the scentficmanagement and always adhered tothe tenet af based on the science & technology guided by the market, surviving upon quality and developing with the credit ‘This publication contains information on the most commonly used instrument transformers. There are many ‘models and ratings not listed which are designed for specal applications. HlEnergypac’ Resin ast Qudoar& Indoor Instrument ansfrmer| 1 ooComplete automated production equipment and good technology line operation fully show the high class quality. Experts are directly take part in the production so as to guard the product stability and reliability. 2 Resin Cast Outdoor & Indoor instrument Transformer EnergypacBenefits of Resin Cast : Instrument Transformers These resin cast instrument transformers are ideal for substrations with better characteristic then oil-filled options including: (1) Less maintenance (2) Compact size (3) Low weight (4) Mounting flexibility (5) Improved safety (6) High reliability (2) High over current capablity (8) Higher thermal ratings HEnergypac: Resin (ast Outdoor & Indoor instrument Transformers SeCurrent Transformers Definitions Instrument Transformer: A transformer intended to supply measuring instruments, meters, relays and other similar apparatus. Current Transformer: An instrument transformer in which the secondary current, in normal conditions of use, is substantially proportional tothe primary current and difer in phase fait by an angle which is approximately zero for ‘an appropriate direction of the connection. Rated Primary Current: The value of the primary current on which the performance ofthe transformers based Rated Secondary Curent: The value of the secondary curent on which the performance ofthe transformer is based Actual Transformation Ratio: The ratio ofthe actual primary cuentto the actual secondary current Rated Transformation Ratio: The rato ofthe rated primary curent to the rated secondaty current Current Error (Ratio Error): The error which a transformer introduces into the measurement of a curent and which arises from the fact thatthe actual transformation ratio isnt equal tothe rated eansformation ratio. ‘The current error expressed in per cent is given by the formula: Curent eror 9 = Where Ky is the rated transformation ratio; |p the actual primary current; [eis the actual secondary curent when Ips flowing, under the conltions of measurement, Phase Displacement: The diference in phase between the primary and secondary cutrent vectors, the tection of the vectors being so chosen that the angle is zero fora perfect transformer. The phase displacement is said to be positive ‘when the secondary current vector leads the primary current vector. Is usually expressed in minutes orcentradians Accuracy Class: A designation assigned toa current transformer the errors of which remain within specified mits under prescribed conditions of use Rated Burden: The value ofthe burden on which the accuracy requirements ofthis specification are based Rated Short-Time Thermal Current (lin): The cm.s value of the primary current which a transformer will withstand for ‘ne second without suffering harmful effects, the secondary winding being short-circuited Rated Dynamic Current (lyn): The peak value of the primary current which 2 transformer will withstand, without being damaged electrically or mechanically by the resulting electromagnetic forces, the secondary winding being shot circuit. Composite Error: Under steady-state conditions, the rms. value of the difference between a) The instantaneous values of the primary current, and 1) The instantaneous values ofthe actual secondary current multiplied by the rated transformation ratio the positive signs ofthe primary and secondary currents corresponding tothe convention fo terminal markings. 4 Resin Cast Outdoor & Indo Instrument Transformer HEnergypac’The compose enor Ec Where ais the rated transformation ratio: ipistheems. valve ofthe primary eunent; ip isthe inantaneous vale othe primary curten iss the instantaneous value ofthe secondary cuents isthe duration of ne cyl; standard Values of Rated Burdens:2.5VA,5.0VA, 10V,1SVAB.30VA ‘Standard Values of Rated Burdens with 5A Secondary Windings Burden Burden Total Power Power Factor Designation _(VAat SA) Meteringburden 60.1 25 09 802 50 09 Bos was os B09 225 09 Relaying burdens B-1.8 450 09 8-10 250 os 8.20 50.0 05 840 100.0 05 880 200.0 as ADDITIONAL DEFINITIONS FOR MEASURING CURRENT TRANSFORMERS Measuring Current Transformer: cutrent transformer intended to supply indicating instrument, Integrating meters and similar apparatus Instrument Security Factor (FS):The ratio of rated instrument limit primary current to the rated primary current, Limits of Current Error and Phase Displacement for Measuring Current Transformers (Classes for 0.1 t0 1) “= Phase displacement at percentage af Accuracy | *Petcentage current (ratio) rated current shown below ema | errorat percentage of rated arent shown below Minutes Gentiadians| S| = [10 wo 2100 = [| 10 o4 | 02 | on on oS as) 028 | 1.15 07s | 035 | 02 02 sw 09 | 04s | 03 1s | o7s| os os 60 za | 1as | o9 so | is | 10 10 060 sa | a7 | i Basis for Accuracy Classes Accuracy class for revenue metering are based on the requitement thatthe transformer correction factor (TCF ofthe curent transformer shall be within the specified limits when the power factor (Lagging) ofthe metered load has any value from 0.6 10 1.0, under specified conditions a follows: a) For current transformers, at the specified standard burden at 10%, and at 100% of rated primary current or extended rating of primary current @Energypac’ Resin Cast Outdoor & Indoor instrument Transform |Sstandard Accuracy Class for metering: Metering accuracy class (curtent transformer {A 10096rated current A TORE rated cent Minium Maximum Minimum Maximum 93 0.997 1.003 0994 1.006 06 090 1.006 0988 10} 12 0.988 von 0976 1028 [ADDITIONAL DEFINITIONS FOR PROTECTIVE CURRENT TRANSFORMERS Protective Current Transformer: A curtent transformer intended to supply protective relays ‘Accuracy Limit Factor: The ratio ofthe rated accuracy limit primary current to the rated primary current. Limits of Error for Protective Current Transformers: Phase displacement a rated primary current Composite eror at Accuracy dass Current eror at ated ” alacant primary cureent imary currents minutes centiadans primary ® 4 20 Ha 5 | 10 B [ 0 Accuracy Ratings for Relaying: ‘Acurrent transformer designed for relaying purposes shall be given an accuracy rating as follows: Lunt oral err elay cass ated cuent @20umes Cand dassifeation| 3 10% Xedassfcation % ser defined [MARKING OF TERMINALS Primary Terminals Wo Aa Lacon! “f D at I at We x 2 Secondary Terminals Fig-2:Curcent transformer with primary in two sections intended for connections either in series rin parallel, {6 Resin ast Outeloar& Indoor Instrument Transformer HlEnergypac’600V OUTDOOR CURRENT TRANSFORMER __Energypac Engineering Limited has got latest standard fer manufacturing the outdoor curent transformer. The quality and performance of instrument transformer is guaranteed by the high class design, testing equipment & meteials. Technical Data [ype ‘ppliation Standard op-wcr telays and contol devies. ASS. 1BTEEEIEC Dperating wokage (max) iL Rated power requency withstand voltage (1 minutes) 066 Rated frequency Primary ated eusrent Secondary ated cuent Numero Primary 5010 5000 Sort Number of Secondary Weigh appa) ( ®Energypac’ Resin Cast Outdor & indoor instrument Iransormer| 715kV RESIN CAST OUTDOOR TYPE CURRENT TRANSFORMER Energypac Engineering Limited has got latest standard fr manufacturing the out-door current transformer. The quality and Performance of instrument transformer is guaranteed by the high class design, testing equipments & Mates. Technical Di [mmiaion atm | Sunda a7. | Opeaingwekagein) ag [ Rated poweriequency itsandvctageomues) —~=~*«*S*=S — 72 2» Pf = | 2 8 6 5 38 & 8 oy so “ ps 36 70 45 0 10) Resin ast Outdoor & indoor Instrument Transformer HEnergypac’Partial Discharge Test Voltages and Permissible levels 2 of earthing ofthe system | Permissible PD evel oe worinesye PDtestvoltage me ems) 1.5) 12U lV A Croepage Distances Minin namin rsepage distance olution evel speciticreepage es arcing distance rmm/kv 122) “tight 6 2.Mesium 2 S35 5. Heavy 5 a0 Yer heavy a - ‘Rati ofthe ceepage distance between phase and cart oer thes ‘Phase to-Phase vale af the highest lager the equipment. 2) Forte infor and manufacturing tlerances on thecreepage stance Various Indoor CT OU gts F..0 8 Y Energypac’ Resin Cast Outdoor noo’ instrament Transformer | 1)TRANSFORMERS Voltage Transformer: An instrument transformer in which the secondary voltage, in normal conditions of us, Is substantially proportional to e ic TAGE ‘the primary voltage and differsin phase fom it by an angle which is approximately zero for an appropriate direction ofthe connections. Unearthed Voltage Transformer: A voltage transformer which has all parts ofits primary winding, including terminals, insulated from earth to aevl corresponding to is rated insulation level Earthed Voltage Transformer: A single-phase voltage transformer which is intended to have one end ofits primary winding directly earthed or a three-phase voltage transformer which s intended to have the star-point of ts primary winding directly earthed Actual Transformation ratio: The ratio ofthe actual primary voltage tothe actual secondary voltage. Rated Transformation rat ratio ofthe rated primary voltage tothe rated secondary voltage. Voltage Errar (Ratio Error): The error which a transformer introduces into the measurement of a voltage and which arises when the actual transformation ratio s nt equal tothe rated transformation ratio The voltage error, expressed in per cent, is given by the formula Voltage eror 95 here Ky fs the rated transformation ratio; Up isthe actual primary voltage; U, isthe actual secondary voltage when Up is applied under the conditions of measurement, Rated Voltage Factor: The multiplying factor to be applied 10 the rated primary voltage to determine the maximum voltage at which a ‘transformer must comply with the relevant thermal requirements fora specified time and with the relevant accuracy requirements Standard Value of Rated Burden: The standard value of rated burden at a pawer factor of 0.8 lagging, expressed in volt amperes, are 10 VA, ‘SYA, 25VA, 30¥A, SOV, 75VA, 1 0OVA, 1 SOVA, 200VA, 300A, 400A, & S0OVA ‘Standard Value of Rated Burden: Limits of Voltage Error & Phase Displacement Designation | VA | eF | Measuring Voltage Transformers ws | or | cas [reweanage Phase Displacement» | [250 7070 | | voltage(ratio) error: | Minutes enti radians 350 | 020 [er_| oa 5 os 75.0 | 085 o2 | 02 10 03 2000 | 0.85 20 06 | [4000 | 0.85 oO wu | Not specified Nar specfied Accuracy (lass: A designation assigned to 2 voltage e es transformer, the errors of which remain within specified Timits under prescribed conditions of use. ‘Standard Accuracy Class for metering Service of Voltage Transformer Voltage Transformers (at 908 to 110% Rated Voltage) Metering accuracy classb Minimum Maximum a3 0.997 1.003 06 0.998 1.006 12 [ 0988 1012 12 Resin ast Outdoor Indoor instrument arsfrmer ®Energypac’15 kV RESIN CAST OUTDOOR TYPE VOLTAGE TRANSFORMER Eneegypac Engineering Limited has got latest standard for manufacturing the out-or voltage transformer, The quality and performance of instrument transformer is uaranteed by the high class design, testing equipment & materials Technical Data Type ‘oDR Pras -ppilation ines, stun relay contol eves Standard 57 EEC Connection Line earth connection [Operating voltage imax) iw 155 fated power frequency withstand voltage (1 iutes) W Impulse test vag (1,250) ww m0 Rated requency ie so Primacy tage v 9330 - Secondary Vote v 70 Residual Vohage v two-1043 aed Therma Burden “a 100 | oteavokage raion 12 Gent eepage dance (in) a 950 Short imeload (Mechanica 8 3780 ‘Weight appro8 - 6 6 HlEnergypac” Resin ast Outdoor Indor Instrument hansforme |1315 kV POTENTIAL TRANSFORMER CONNECTION DIAGRAM IN SERVICE CONDITION HH Lt 15 kV Single Phase Single Pole Potential Transformer Connection Diagram 14 Resin Cast Outdoor & Indoor instrument Transformer Energypac34-kV RESIN CAST OUTDOOR TYPE VOLTAGE TRANSFORMER Energypac Engineering Limited has got latest standard for manufacturing the out-door voltage transformer. The qualty and performance of instrument transformer is quaranteed by the high class design, testing equipment & matells Technical Data Type. ODR-PT-34 ‘pletion meters, nstruments, elas contol devices standard ANSI C57 13EBENEC Conection Unero tine ‘Operating voltage (max) Rated power frequency withstand voltage (1 minutes) Impulse rest wotage (1,250) Rated Frequency Primary Voltage Secondary Yotooe 20 ated Thermal Burden 300 Rated Voltage Factor 12continuous reepage distance (in) 1400 Short time fad Mechanical 3750 Weigh (approx) s @lEnergypac’ Resin (2 Outen 8 ndornsrument Kastner 1534 KV POTENTIAL TRANSFORMER CONNECTION DIAGRAM IN SERVICE CONDITION + = 34 kV Double Pole Potential Transformer Connection Diagram ww Energypac’ 16 | Resin ast Outdoor Indoor Instrument ansformerINDOOR VOLTAGE TRANSFORMER UP T0 33kV Fneroypac Engineering Limited has got latest standard for manufacturing the indoor voltage transformer. The quality and performance of instrument transfonmer is guaranteed by the high class design, testing equipment & materials. Technical Data ype RPT ‘Apliation meters, instruments, relays & control ences standard SI CS7-1BIEEEAEC Operating wotage (max) 365 Rated frequency Te Rated Primary Voltage Trev ors3KV Aated Secondary Voltage 1100" 100 Max ouden 200, 100 & 50 Accuracy das: 0.,02,05810,37a.6" Number ofwinings tor2ora Insulation as: E Standard Values of Rated Voltage Factors (PT) Rated voltage | Rate time factor 12] Gontinuous | Between phases in any network Between transformer ste-pont andearthin any network 12 | Continous | Between phase and carthin an effectively earthed neutral ter (21.258) 15 305 | 12 | Continuous Method of connecting the primary winding and system earthing conditions Between phase and earthin a non-ffectvely earthed neutral system (2.125) 13 305 ‘vith automatic eath-fault tipping 1.2 | Continuous — | Between phase and cath nan isolated neutral system 2.1.20) without automatic 19 3h cath-fult tripping or ina resonant earthed system (2.1.23) without automatic car fult ping Creepage Distances, Minimum nominal Pollution level speciticcreepage ‘mmvk 12) ght 6 2. Medium 20 ss 1 Heavy 25 Nery hear n 1) Ratio of the ceepage distance Between phase and earth ove thera Phase:to- Phase vale ofthe highest vatage forthe equipment. 2} Forother information and manufacturing tolerances on theceepage distance, reepage distance arcing distance <0 BiEnergypac’ Fes Cat uno edotsument Tantra 17Partial Discharge Test Voltages and Permissible Levels. T Permissible PD level PDtest e ‘Type of earthing Connections of the voltage | eof insulation of the system primary winding (ms) Tat — wv ners Solid iquid Enrthed neutral system Phase-to-earth v ib so (earth faut factor $1.5) 120 ea 5 2 Phase-to-Phase 120, 5 20 Isolated or non effectively earthed Phase-to-earth 12U 5 10 50 neutral system 12U afV3 5 2» (earth fauitfactor> 1) | Phase-to-Phase 7120p 5 20 us Indoor PT 18| Resin Cast Outdoor & Indoor Instrument Transfer HEnergypac’cert ‘AN ISO 9001:2008 & 140012004 Certified Company Crafted with pride WB ingle HEnergypac’ Energypac Engineering Limited. Energypac Engineering Ltd. Chittagong Office for Sales & Service Rajshahi Office Energy Center, 25799300 VA naka 1208 ouse 2, Lan Ro 1, Block L Mar Ai Mien ata ero Migaa) Prone: 80-2.8879395, fx 8802 875396. aisha Housing Este chitagong Sopa, sho, Bangladesh Email energ@o-oniecom,afenerypaccom Bangladesh Prone: 760059 ‘woraanrgypac icon Phone: (88021) 723607 Fans 251041, 19473 ‘Works India Office Bape, Saar Enrgyac Egineenng i Khuina Office forSales & Service Dhaka, Baindesh 1-14 Sector Sal ake 2 Laer aa aan Al Road Phone: 9346866 falkat- 7000s ada Kim, Banglades "el:000 e330 3028025 Pane: 72546