CABLE CURRENT TRANSFORMERS types: KOLMA, KOLA, KOKM, KORI, KOKU, KODI, KOLT. Catalogue

Transcription

1 ABLE URRENT TRANSFORMERS types: KOLMA, KOLA, KOKM, KORI, KOKU, KODI, KOLT atalogue

2 ONTENT page 1. KOLMA, KOLA... 3 Description... 3 How to select the correct residual current transformers... 3 Technical data... 4 Installation... 4 Ordering data... 6 Overall dimensions KOKM... 8 Technical data... 8 Ordering data...10 Installation...10 Overall dimensions KOKM (for ZX panels)...17 Technical data...17 Overall dimensions KOKM (for RMU) Electrical parameters, dimensions, connection diagrams Terminal marking Outside dimension of T's onnection diagram KORI Technical parameters KOKU Technical data Ordering data Overall dimensions KODI... Overall dimensions... Measurment diagram KOLT Technical data Overall dimensions... 44

3 able urrent Transformers, indoor types: KOLMA, KOLA Description Transformers, KOLMA_ and KOLA_ are suitable for the measurement of the sum of threephase currents in a 3-phase cable. Under normal operating conditions this sum is zero. In the event of an earth-fault the sum of the currents is equal to the earth-faul current and a corresponding current flows in the secondary. These transformers are used together with static earth-fault relays. The cable current transformers can generally be used when measuring the residual current e.g. to prewarn of, or locate an earth-fault. An busbar or cable serves as the primary conductor. How to select the correct residual current transformers The transformer for an earth-fault relay is selected according to dimension of the window, and construction of the transformer. For types KOLMA 06 A1, and KOLMA 06 D1, the number of turns used in the secondary winding is selected according to the relay setting value, and the earth-fault current or the required current ratio. In addition correct functioning of the earthfault protection relays for KOLMA 06 A1 and KOLMA 06 D1 is easy to test by means of the test winding (terminals x - x) of the transformer. The test winding is rated for 6 A max. continuous current.

4 Table 1. Selection of residual current transformers able current transformers, types KOLMA Type Window diam. mm onstruction Weight kg KOLMA 06 A1 90 Ring core, multi-tap secondary 7.0 KOLMA 06 A2 58 Ring core 2.9 KOLMA 06 B2 100 Ring core 5.4 KOLMA 06 D1 1 Ring core, multi-tap secondary 11.5 KOLMA 06 D2 1 Ring core 11.4 KOLA 06 B2 100 Split ring core 6.0 KOLA 06 D2 1 Split ring core 11.0 Technical data The primary winding of indoor type cable current transformers is either a cable or a busbar, which is insulated for the application voltage. The secondary winding and ring shaped iron core is cast in resin which has good electrical and mechanical properties. Rated voltage 0.72 kv (1) Insulation test voltage 50 Hz 1 min 3 kv (IE ) Frequency 50 Hz (60 Hz) Rated thermal current 1.2 x I pn Short-time withstand current I th 1 s 60 x I (2) pn Peak withstnad current I dyn 2.5 x I th Secondary terminals For 6 mm 2 conductor Operating temperature range (1) The insulation level of the primary conductor determines the maximum operating voltage. (2) KOLA 06 B2 is type tested for 10 ka 3 s. Installation The KOLMA-types must be installed before the cables and cable terminations are connected. With the KOLA 06 B2 and KOLA 06 D2 -types, the ring core can be opened and thus the transformer can be installed eventhough the cable is already connected. The two halves of the ring core are tightened together with four screws which also guide the halves to the correct position. The secondary winding is distributed over both halves of the core. The two sections of the winding are connected together with two connecting pieces. able current transformers are fastened either by means of the fixing base or by the nuts cast into the transformer frame. When installing the transformer, the effect of the current in the metal armour or in the protective conductor must be eliminated. In case the metal armour or the protective conductor is drawn through the transformer, the earthing conductor must be drawn back through the transformer for earthing. The earthing conductor between the cable termination box and the transformer, must not be connected to conductive structures, and the metal cable termination box must be insulated from the supporting structures. On a multi-ratio transformer the unconnected secondary winding terminals and test winding must not be short circuited. Number of turns and terminal markings KOLMA 06 A1 KOLMA 06 D able S3 S4 S5 x x KOLMA 06 A2 KOLMA 06 B2 KOLMA 06 D2 KOLA 06 B2 KOLA 06 D2 100 able Test winding

5 Table 2. urrent ratios and rated burdens for accuracy class 10 P 10 urrent ratio A 50/1 70/1 100/1 150/1 50/5 100/5 150/5 250/5 350/5 500/5 600/5 750/5 Secondary terminals S4 - S5 S3 - S4 - S4 - S5 - - S3 - S3 S4 - S5 S3 - S4 - S4 S3 - S5 - S5 KOLMA 06 A Burden / VA Type KOLMA 06 D Openable residual current transformers, type (KOLA 06 B2) complete with fixing base KOLMA-ZK 1 and terminal cover KOK-ZAX 14. Table 3. Standard technical parameters Type Dimensions Primary Secondary Accuracy Burden current current class inner outer height [VA] [A] [A] [A] mm mm mm KOLMA 06 A KOLMA 06 B KOLMA 06 D KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 B KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 D KOLA 06 J x x KOLA 06 J x x KOLA 06 J x x KOLA 06 J x x Note: If you need other electrical parameters than given in tables please contact with our sales forces.

6 Table 4. Selection of accessories for KOLMA_ i KOLA_ Description of accessory Type Suitable for use together with transformer Fixing base KOLMA-ZK 1 KOLMA 06 A1 Fixing base KOLMA-ZK 1 KOLMA 06 A2 Fixing base KOLMA-ZK 1 KOLMA 06 B2 Fixing base KOLMA-ZK 1 KOLA 06 B2 Fixing base KOLMA-ZK 2 KOLMA 06 D1 Fixing base KOLMA-ZK 2 KOLMA 06 D2 Fixing base KOLMA-ZK 2 KOLA 06 D2 Secondary terminal cover KOK-ZAX 14 KOLMA 06 A2 Secondary terminal cover KOK-ZAX 14 KOLMA 06 B2 Secondary terminal cover KOK-ZAX 14 KOLA 06 B2 Secondary terminal cover KOK-ZAX 14 KOLA 06 D2 Warranty The factory grants 24 months of warranty from the day of put to use of the transformer, but no longer than 36 months from the day of sell. The warranty concerns only manufacturing defects and does not include defects arose because of: improper transport, improper storage, not abiding of the instruction before installing and during operating of the transformers, improper selection of the transformer for the electric power system. Ordering data The order should contain following data: - type of current transformer - rated primary current / rated secondary current [A/A] - rated burden and accuracy class for each winding [VA] - short-time thermal current Ith - standard - quantity Order example KOLA 06B2 ; 100/1 A/A ; 2 VA ; 100 ; Ith = 60xIpn/1s ; IE ; 12 pcs

7 Overall dimensions KOLMA 06 A1 KOLMA 06 A2, B2 KOLMA 06 D1, D2 52 M KOK-ZAX 14 12,5 KOLMA-ZL2, KOLMA-ZL 2,3 A B M KOLMA-ZK KOLMA-ZK KOLMA-ZK1 78 D Dims. [mm] Type A B D KOLMA 06 A KOLMA 06 B KOLA 06 B2 KOLA 06 D2 KOLA 06 J2_ 7 7 KOK-ZAX 14 KOK-ZAX 14 7 KOK-ZAX 14 ø15 a2 M a a a b b R KOLMA-ZK1 KOLMA-ZK M8 18 M KOLMA-ZK M10 R14 90 b2 b1 a2 a a1 a2 b2 b1 ø22,

8 able urrent Transformers, indoor type KOKM KOKM - current transformers are suitable for measuring of phase currents. An busbar or cable serves as the primary conductor. Series KOKM current transformers can also be used for measuring the phase current at voltages even higher than 0,72 kv (for KOKM 06) or 1,2 kv (for KOKM 1), if the insulation of the primary conductor fulfils the respective standards for the operating voltage. The secondary winding and ring shaped iron core is cast in resin which has good electrical and mechanical properties. Table 5. Technical data Transformer type KOKM 06 KOKM 1 Rated voltage U m [ kv ] 0.72 (1) 1.2 (1) Power frequency test voltage U p (1 min) [ kv ] 3 6 Lighting test voltage U pp [ kv ] - - Frequency f n [ Hz ] 50 lub 60 Max. primary current I pn [ A ] Rated secondary current I sn [ A ] 1 lub 5 Rated thermal current I cont [ A ] 1,2 x I pn (2) Short-time withstand current I th (1 sek) [ ka ] 60 x I pn (3) (4) Peak withstand current I dyn [ ka ] 2,5 x I th Secondary terminals For 6 mm 2 conductor Operating temperature range [ ] Transport and storage [ ] Electrical standards (1) The insulation level of the primary conductor determines the maximum operating voltage. (2) Max. I cont for KOKM 06 I cont = 2 0 A, for KOKM 1 I cont = A (3) Max. I th = 100 ka, (4) Max. I dyn = 250 ka IE, VDE, ANSI, BS, AS, AN

9 Table 6. Technical parameters of cable current transformers Type urrent Dimensions Accuracy Burden primary secondary inner outer height class A A VA mm mm mm KOKM 1 B KOKM 1 D KOKM 1 DF KOKM 1 D KOKM 1 D KOKM 1 D KOKM 1 D KOKM 1 DH KOKM 1 E KOKM 1 EF KOKM 1 E KOKM 1 E KOKM 1 E KOKM 1 EH KOKM 1 E KOKM 1 EF KOKM 1 F KOKM 1 F KOKM 1 F KOKM 1 F KOKM 1 F KOKM 1 GF KOKM 1 GF KOKM 1 GF KOKM 1 HF KOKM 1 HF KOKM 1 HH KOKM 1 HF KOKM 1 HK KOKM 1 HK KOKM 1 HK KOKM 1 HK KOKM 1 HK KOKM 1 HF KOKM 1 HF KOKM 1 HJ KOKM 1 KH KOKM 1 KH KOKM 1 KH KOKM 1 KH KOKM 1 KH KOKM 1 KH KOKM 1 KH KOKM 1 KH KOKM 1 KK KOKM 1 NK KOKM 1 NK KOKM 1 NK KOKM 1 NL KOKM 1 NL KOKM 1 RL KOKM 1 RL KOKM 1 RL KOKM 1 RL KOKM 1 RL KOKM 1 UT KOKM 1 U Table presents chosen technical parameters for cable current transformers. In case of different types (dimensions) parameters can be different (generally the bigger T the higher technical parameters). If you requier other parameters than given in table please contact our sales forces.

10 Ordering data The order should contain following data: - type of current transformer - rated primary current / rated secondary current [A/A] - rated burden and accuracy class for each winding [VA] - short-time thermal current Ith - standard - quantity KOKM 1 F6 Order example KOKM 1 F8 ; 600/5 A/A ; 10 VA ; 0.5 ; Ith = 60xIpn/1s ; IE ; 9 pcs Terminal markings one secondary winding example: 100/1 [A/A] S3 multi-tap secondary winding example: /1 [A/A] two secondary windings example: 0/5/5 [A/A/A] KOKM 1 RL 8 Instructions for installation Mounting of the cable current transformers The cable current transformer may be installed either in vertical or in horizontal position. It can be mounted either by using bottom inserts or by using a separate fixing base, which in turns is fixed to the bottom inserts. When using the bottom inserts for mounting, the screws (M8) shall not be tightened in excess of the nominal torque; 9 Nm, for the screws (M6) 3.3 Nm, otherwise damage may occur. Use a torque spanner if necessary. The current transformer can be fastened to the cable which acts as primary conductor by means of a special fixing piece. In such cases it must be insured that the cable endures the strain caused by the weight of the transformer, especially in circumstances where vibration is involved. The secondary terminal screws, size, must not be tightened in excess of 2.5 Nm (M4 1.0 Nm). Fastening of the primary cable The cable acting as primary winding shall be entered through the opening in the cable current transformer. This must be done before the cable box belonging to the cable inserted through the primary opening is installed. If the cable box can be entered through the primary opening even when it is installed on the cable, the installation of the cable box can also be done before. With the KOLA 06 J2, the cable current transformer can be opened and thus the transformer can be installed even though the cable is already connected. The two halves of the ring core are tightened together with four screws which also guide the halves to the correct position. The secondary winding is distributed over both halves of the core. The two section of the winding are connected together with two connecting pieces. Note The secondary terminals of the current transformer should never be left open-circuited, because in that case hazardous high voltages will be induced between the secondary terminals. Instructions for maintenance able current transformers do not need to be maintained. However, excessive dust or other kind of dirt can be brushed off the transformer. Dirty transformers can be cleaned with water, spirit, petrol or toluene. Traces of arcs and minor surface damages can be easily removed with sandpaper after which the surface is to be treated with silicone paste. Epoxy resin surfaces of the current transformer have also a high resistance to chemicals. The transformers can be used in areas, where the atmosphere includes corrosive gases such as sulphuric and nitrogenous compounds provided that secondary terminals and fixing base of the transformers have been ordered to meet the demands of the operating atmosphere. Instructions for repairing greater surface damages (such as cracks) must be requested from the manufacturer. 10

11 Storage instructions For current transformers, the allowed storage temperature is The transformers shall be protected against direct sun light. Package, Transport and Storage Transformers assigned for export are packed in wooden cases lined with the asphalt building paper. During the transport of transformers one should pay attention to proper position of wooden cases in accordance with inscription and marks given on them and their protection against the influence of weather conditions. Transformer should be stored in dry and clean accommodations, protecting direct influence of precipitation and frost. Warranty The factory grants 24 months of warranty from the day of put to use of the transformer, but no longer than 36 months from the day of sell. The warranty concerns only manufacturing defects and does not include defects arose because of: improper transport, improper storage, not abiding of the instruction before installing and during operating of the transformers, improper selection of the transformer for the electric power system. Procedure regarding the products after the end of their use. The manufacturer gets back or indicates the store place for instrument transformers of its own production, which the period of use is finished, in order to their recycling. Table 7. KOKM 1 Example KOKM 1 D 10 Transformers width 10 = 100mm (possibility - 6, 8, 10, 12, 14, 16, 18,, 22, 24,...30) Outer diameter = 148 mm Hole diameter D = 60 mm Rate voltage 1 = 1,2 kv Type KOKM - indoor use, (KOKU - outdoor use) Outer diameter [mm] Hole diameter [mm] A B D E F G H K N R S U W X Y Z Drawing asting height [mm] Total height [mm] Hole center height [ mm] 148 F 186 H J 235 K 250 L 270 M 2 P 3 T 450 W KOKM Range of transformers width KOKM 1_F_ KOKM 1_H_ KOKM 1_J_ KOKM 1_K_ KOKM 1_L_ KOKM 1_M_ KOKM 1_P_ KOKM 1_T_ KOKM 1_W_

12 Overall dimensions KOKM KOKM 1_F_ B ( ) ±3 ±2 ±2 B ( ) 236 ±2 183 M6 113 Di B ( ) ±2 B (60...) ±2 266 ± ±2 M Di M8 Di = A B D E F 148 ±2 112 KOKM Di = A B D E F G H M8 ±2 131 KOKM 1 _ F B = = Note: 1) KOKM 1_6 without the cover B = = Note: 1) KOKM 1_F6 without the cover KOKM 1_H_ KOKM 1_J_ M ±2 138 M ±3 235 ±2 ±2 B () 11 ±2 B ( ) 52 1 Di 170 Di = A B D E F G H K B = = KOKM 1 _ H _ N 12

13 KOKM 1_K_ KOKM 1_L_ M B ±2 14 B ±2 150 M ± ±2 15 Di = A B D E F G H K N M8 Di ±2 158 KOKM 1 _ K _ 350 ± ±2 15 M8 Di = A B D E F G H K N R S B = = Di ±2 158 KOKM 1 _ L _ B = = KOKM 1_M_ KOKM 1_P_ 13

14 KOKM 1_T_ KOKM 1_W_ Note: Without fixing base. Fix directly to floor. Note: Without fixing base. Fix directly to floor. KOKM 1 W KOKM 06 J Table 8. KOKM 06 Standards parameters for KOKM 06 J_ (window type) f = 50 Hz Type Window [mm] Primary current [A] Secondary current [A] Accuracy class Burden [VA] KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J2 300x KOKM 06 J21 150x KOKM 06 J21 150x KOKM 06 J21 150x KOKM 06 J21 150x KOKM 06 J22 300x KOKM 06 J22 300x KOKM 06 J22 300x KOKM 06 J22 300x KOKM 06 J22 300x KOKM 06 J23 600x KOKM 06 J23 600x KOKM 06 J23 600x KOKM 06 J23 600x KOKM 06 J24 300x KOKM 06 J24 300x KOKM 06 J29 450x KOKM 06 J29 450x KOKM 06 J29 450x KOKM 06 J29 450x Note: If you need other electrical parameters than given in tables please contact with our sales forces. 14

15 M R R Overall dimensions KOKM 06 J2 KOKM 06 J21_ M R R KOKM 06 J22 KOKM 06 J23 M M R 462 R R14R

16 16 KOKM 06 J24 KOKM 06 J29_ 113 M R R M R R

17 able urrent Transformers, indoor type KOKM (for GIS type ZX) KOKM 1 EB and KOKM 1 ED is the indoor, cable, low voltage current transformer in resin insulation.transformers of KOKM type are suitable for measurement of phase currents. As the primary conductor is used the busbar or the. urrent transformers of KOKM series can be also used for measurement of the phase current at voltages even higher then 1,2 kv, if the insulation of the high voltage primary conductor fulfils the equirements of elevant standards relating to the working voltage. Technical data Type... KOKM 1EB, KOKM 1 ED Maximum number of windings... 3 Level of insulation... 1/6/- Highest permissible voltage of the current transformer U r...1,2 kv Rating test voltage of insulation (50 Hz, 1 min U p )...6 kv Rating frequency Hz, 60 Hz Rating thermal current...1,2 x I pn Short-time withstand thermal current I th, 1s...60 x I pn Rating peak current I dyn... 2,5 x I th Working temperature range onformity with standards - IE, ANSI, PN-EN, AN Ordering data The order should contain following data: - type of current transformer - rated primary current / rated secondary current [A/A] - rated burden and accuracy class for each winding [VA] - short-time thermal current Ith - standard - quantity Order example KOKM 06 NN; /1 A/A, I th = 60 x I pn,1 VA pieces 17

18 Table 9. For selecting current transformers KOKM 1 EB Primary urrent I pn [A] Measurement class FS Secondary current I sn = 1 [A] Protection class Fa Maximum permissible load [VA] Measurement class Fs Secondary current I sn = 5 [A] Protection class Fa 0, , ,5 0,5 0,5 0,5 60 0,5 0,5 0,5 0,5 0,5 70 0, ,5 0,5 0,5 0, , ,5 1,5 1,5 0,5 1, ,5 4 1,5 1,5 0,5 2, ,5 1,5 1,5 0,5 0,5 3 1,5 1, ,5 1,5 1,5 0,5 1, , , ,5 1, ,5 5,5 8,5 2,5 2,5 0,5 2,5 12 2,5 2, ,5 2,5 2,5 0, ,5 3, , , ,5 3, ,5 15 4,5 4,5 1, , ,5 4,5 1, , ,5 5, , At special request can be delivered also current transformers with values of secondary current different these given in the table above (e.g. 2 a or 4,3 A) and current transformers for frequency 60 Hz. 18

19 Overall dimensions KOKM 1 EB version 01 KOKM 1 EB version M KOKM 1 EB version max 6 24, ,5 19 rating plate 0, ~5m 70 A B M6 2= M6 1= M3 Type Dims. [mm] A B KOKM 1 E KOKM 1 E KOKM 1 E KOKM 1 ED ok max 6 8 ok , ,5 M6 70 M A B A B 3S 2S 130 1S Type Dims. [mm] A B KOKM 1 E KOKM 1 E KOKM 1 E KOKM 1 E KOKM 1 E KOKM 1 E

20 KOKM 06 NN is the indoor, cable, low voltage current transformer in resin insulation. Transformers of KOKM type are suitable for measurement of phase currents. As the primary conductor is used the non-insulated busbar or the cable. urrent transformers of KOKM series can be also used for measurement of the phase current at voltages even higher then 0,72 kv, if the insulation of the high voltage primary conductor fulfils the equirements of elevant standards elating to the working voltage. Technical data KOKM 06 NN 12 Type... KOKM 06 NN Maximum number of windings... 1 Level of insulation... 0,6/3/- Highest permissible voltage of the current transformer U r...0,72 kv Rating test voltage of insulation (50 Hz, 1 min U p )...3 kv Rating frequency...50 Hz Rating thermal current...1,2 x I pn Short-time withstand thermal current I th, 1s...60 x I pn Rating peak current I dyn... 2,5 x I th Working temperature range onformity with standards - IE, ANSI, PN-EN, AN Table 10. For selecting current transformaters KOKM 06 NN Primary urrent I pn [A] Measurement class FS Secondary current I sn = 1 [A] Protection class Fa Maximum permissible load [VA] Measurement class Fs Secondary current I sn = 5 [A] Protection class Fa 0, , ,5 1, ,5 1, ,5 4,5 1,5 75 5,5 2, , , ,5 4 7,5 1, , ,5 7 2, ,5 9 3, ,5 13 5, ,5 17 8, ,5 15 6, , At special request can be delivered also current transformers with values of secondary current different these given in the table above (e.g. 2 a or 4,3 A) and current transformers for frequency 60 Hz.

21 Overall dimensions KOKM 06 NN A x Messingrohr 12x1, Type Dims. [mm] A KOKM 06 NN 6 60 KOKM 06 NN 9 90 KOKM 06 NN

22 KOKM 06 LM is the indoor, cable, low voltage current transformer in resin insulation. Transformers of KOKM type are suitable fo measurement of phase currents. As the primary conductor is used the busbar or the cable. urrent transformers of KOKM series can be also used for measurement of the phase current at voltages even higher then 0,72 kv, if the insulation of the high voltage primary conductor fulfils the equirements of elevant standards relating to the working voltage. Technical data Type... KOKM 06 LM Maximum number of windings... 1 Level of insulation... 0,6/3/- Highest permissible voltage of the current transformer U r...0,72 kv Rating test voltage of insulation (50 Hz, 1 min U p )...3 kv Rating frequency...50 Hz Rating thermal current...1,2 x I pn Short-time withstand thermal current I th, 1s...60 x I pn Rating peak current I dyn... 2,5 x I th Working temperature range onformity with standards - IE, ANSI, PN-EN, AN KOKM 06 LM Table 11. For selecting current transformaters KOKM 06 LM Primary urrent I pn [A] Measurement class FS Secondary current I sn = 1 [A] Protection class Fa Maximum permissible load [VA] Measurement class Fs Secondary current I sn = 5 [A] Protection class Fa 0, , ,5 1, ,5 1,5 3,5 1, ,5 4,5 1, , ,5 5 1,5 6 2,5 6 1, , , ,5 9 3, ,5 13 5, ,5 16 8,5 15 6,5 15 6, At special request can be delivered also current transformers with values of secondary current different these given in the table above (e.g. 2 a or 4,3 A) and current transformers for frequency 60 Hz. 22

23 Overall dimensions KOKM 06 LM 95.5 A x Messingrohr 12x1, Type Dims. [mm] A KOKM 06 LM 6 60 KOKM 06 LM 9 90 KOKM 06 LM

24 KOKM... LH is the indoor, cable, low voltage current transformer in resin insulation. Transformers of KOKM type are suitable for measurement of phase currents. As the primary conductor is used the busbar or the low voltage cable. urrent transfo mers of KOKM series can be also used for measurement of the phase current at voltages even higher then 1,2 kv, if the insulation of the high voltage primary conductor fulfils the equirements of elevant standards relating to the working voltage. Technical data Type...KOKM... LH Maximum number of windings... 1 Level of insulation... 1/6/- Highest permissible voltage of the current transformer U r...1,2 kv Rating test voltage of insulation (50 Hz, 1 min U p )...6 kv Rating frequency...50 Hz Rating thermal current...1,2 x I pn Short-time withstand thermal current I th, 1s...60 x I pn Rating peak current I dyn... 2,5 x I th Working temperature range onformity with standards - IE, ANSI, PN-EN, AN Table 12. For selecting current transformers KOKM... LH Primary urrent I pn [A] Measurement class FS Secondary current I sn = 1 [A] Protection class Fa Maximum permissible load [VA] Measurement class FS Secondary current I sn = 5 [A] Protection class Fa 0, , ,5 0,5 1,5 1 0,5 0, ,5 0, ,5 70 2,5 1 1,5 1 2,5 1 1, ,5 1 1,5 1 2,5 1, ,5 3,5 1,5 3,5 1,5 1,5 3 1,5 3 1, ,5 4 1,5 2,5 3,5 1,5 3,5 1,5 1 3,5 4 1,5 4 1,5 3,5 3,5 1,5 3,5 1, , ,5 4,5 2 4, ,5 5,5 2 5,5 2 8, ,5 2 7,5 3 2, ,5 7 2, ,5 3,5 8,5 3, ,5 3 8, ,5 9 3, ,5 9 3, ,5 10 4, ,5 12 4, ,5 12 5, ,5 18 5, ,5 21 8, ,5 19 5, ,5 21 8, ,5 5, ,5 27 5, ,5 31 8, ,5 32 6,5 At special request can be delivered also current transformers with values of secondary current different these given in the table above (e.g. 2 a or 4,3 A) and current transformers for frequency 60 Hz. 24

25 Overall dimensions KOKM 072 LH version 01 KOKM 072 LH version ,5 19 Ø Ø130 Ø11 M ,5 235 B A Ø M ,5 B A M3 24,5 Type Dims. [mm] A B KOKM 072 LH KOKM 072 LH KOKM 072 LH ,5 37 KOKM 1 LH... version 03 secondary terminals, lenght 6m, cable 4mm Ø ,5 112, , ,5 fixing base rating plate screw cap for bushing PG16 seal wire pocket PG INDEX of T Description ode A B 1YMA183183R0013 T KOKM 1 LH 12 with cable and from cable side KOKM 1 LH 12-v3-1 1YMA183183R0012 T KOKM 1 LH 9 with cable and from cable side KOKM 1 LH 9-v3-90 1YMA183183R0011 T KOKM 1 LH 6 with cable and from cable side KOKM 1 LH 6-v3-60 1YMA183183R0003 T KOKM 1 LH 12 with cable and from cable side KOKM 1 LH 12-v3-1 1YMA183183R0002 T KOKM 1 LH 9 with cable and from cable side KOKM 1 LH 9-v3-90 1YMA183183R0001 T KOKM 1 LH 6 with cable and from cable side KOKM 1 LH 6-v

26 KOKM... NJ is the indoor,cable, low voltage current transformer in resin insulation. Transformers of KOKM type are suitable for measurement of phase currents in low voltage switchgears. As the primary conductor is used the non-insulated busbar or the low voltage cable. urrent transformers of KOKM series can be also used for measurement of the phase current at voltages even higher then 1,2 kv, if the insulation of the high voltage primary conductor fulfils the equirements of elevant standards elating to the working voltage. Technical data KOKM 072 NJ 8 version 01 Type... KOKM... NJ Maximum number of windings... 1 Highest permissible voltage of the current transformer U r...1,2 kv Rating test voltage of insulation (50 Hz, 1 min U p )...6 kv Rating frequency...50 Hz Rating thermal current...1,2 x I pn Short-time withstand thermal current I th, 1s...60 x I pn Rating peak current I dyn... 2,5 x I th Working temperature range onformity with standards - IE, ANSI, PN-EN, AN Table 13. For selecting current transformers KOKM...NJ Primary urrent I pn [A] Measurement class FS Secondary current I sn = 1 [A] Protection class Fa Maximum permissible load [VA] Measurement class FS Secondary current I sn = 5 [A] Protection class Fa 0, , ,5 0,5 2 0,5 0,5 0,5 60 2,5 1 0,5 1 2,5 1,5 0,5 0, ,5 1,5 1,5 3 1, ,5 1,5 2 1,5 3 1,5 1, ,5 4, ,5 4 1,5 4 1, ,5 4,5 2,5 1,5 4,5 2 4, ,5 5,5 2,5 5,5 2, ,5 3 6,5 3 4,5 6 2,5 6 2, , ,5 3 6,5 3 1, ,5 8 3, ,5 13,5 9,5 4,5 9,5 4,5 4, ,5 10 4, ,5 12 5, ,5 14 6, ,5 16 7, At special request can be delivered also current transformers with values of secondary current different these given in the table above (e.g. 2 a or 4,3 A) and current transformers for frequency 60 Hz. 26

27 Overall dimensions KOKM 072 NJ version 01 KOKM 072 NJ version Ø155 M B A Type Dims. [mm] A B KOKM 072 NJ KOKM 072 NJ KOKM 072 NJ KOKM 1 NJ... version 03 A Ø155 secondary terminals, lenght 6mm cable 4mm ,5 112,5 127, fixing plate rating plate seal wire pocket PG16 5 screw cap for bushing PG INDEX of T Description ode A B 1YMA183182R0013 T KOKM 1 NJ 12 with cable and from cable side KOKM 1 NJ 12-v3-1 1YMA183182R0012 T KOKM 1 NJ 9 with cable and from cable side KOKM 1 NJ 9-v3-90 1YMA183182R0011 T KOKM 1 NJ 6 with cable and from cable side KOKM 1 NJ 6-v3-60 1YMA183182R0003 T KOKM 1 NJ 12 with cable and from cable side KOKM 1 NJ 12-v3-1 1YMA183182R0002 T KOKM 1 NJ 9 with cable and from cable side KOKM 1 NJ 9-v3-90 1YMA183182R0001 T KOKM 1 NJ 6 with cable and from cable side KOKM 1 NJ 6-v

28 able urrent Transformers, indoor type KOKM (for RMU) KOKM 072 BA 10, A 10 - ring core current transformers types KOKM 072 BA 10, A 10, are predicted for supplying metering appliances as well as protection devices, at the maximum nominal voltage 0,72 kv and nominal frequency 50 or 60 Hz. Transformers can be mounted in indoor conditions inside the switchgear. The nominal temperature of transport and storage for this indoor transformers is in the range +5 0, + 0. Secondary circuits should be mounted using copper wires with the cross section at least 2,5 mm 2.onnecting schemes for current and energy measurement are shown on pages 30 and 31. Table 14. Electrical parameters, dimensions, connection diagrams Type KOKM 072 BA 10 KOKM 072 A 10 KOKM 072 A 10 KOKM 072 A 10 KOKM 072 A 10 KOKM 072 A 10 2 pcs. (terminals 2 pcs. (terminals 1 pcs. (terminals 1 pcs. (terminals 1 pcs. (terminals 1 pcs. (terminals Number of windings S0-- S0--) for measuring 137 turns (48+89)) 1116 turns ( ) 187 turns) 381 turns) 765 turns) 1535 turns) Number of windings for the test 1 pcs. (terminals -D 48 turns) 1 pcs. (terminals -D 391 turns) 1 pcs. (terminals -D 50 turns 1 pcs. (terminals -D 100 turns) 1 pcs. (terminals -D turns) 1 pcs. (terminals -D 0 turns) Rated insulation level 0,72/3/- 0,72/3/- 0,72/3/- 0,72/3/- 0,72/3/- 0,72/3/- Highest voltage for equipment U m 0,72 kv 0,72 kv 0,72 kv 0,72 kv 0,72 kv 0,72 kv Rated power-frequency withstand voltage (r.m.s.) 3 kv 3 kv 3 kv 3 kv 3 kv 3 kv Rated frequency f n 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz Rated primary current I pn 14,4 41,1 A 117,4-335 A 14,4 A 28,8 A 57,6 A 115,2 A Rated secondary current I sn 0,3 A 0,3 A 0,075 A 0,075 A 0,075 A 0,075 A Test Winding 0,3 A 0,3 A 0,288 A 0,288 A 0,288 A 0,288 A Accuracy class with relay type MPRB / WI1 5P30 5P30 10P 5P 5P 5P Rated burden 0,1 VA 0,1 VA 0,1 VA 0,1 VA Rated continuous thermal 4 x I pn 4 x I pn 10 x I pn 10 x I pn 10 x I pn 10 x I pn current I cth (ext. 0%) (ext. 0%) (ext. 1000%) (ext. 1000%) (ext. 1000%) (ext. 1000%) Rated short-time thermal current I th,1s 100 x I pn A 100 x I pn A ka ka ka ka Rated dynamic current I dyn 2,5 x I th A 2,5 x I th A 62,5 ka 62,5 ka 62,5 ka 62,5 ka Insulation class E E E E E E Protection IP IP IP IP IP IP External dimensions DxdxLxH 100x42x100x x50x100x x50x100x x50x100x x50x100x x50x100x124 Weight 3,3 2,8 2,27 1,9 1,4 1,7 Working temperature range onformity with standards IE IE IE IE IE IE

29 Terminal marking KOKM 072 BA 10 = MPTA KOKM 072 A 10 = MPTA Terminals Ratio lass Turns of the winding S0 14,4/0,3 A 5P30 48 S0 41,1/0,3 A 5P (48+89) - D 0,3 A test winding 48 Terminals Ratio lass Turns of the winding S0 117,4/0,3 A 5P S0 335/0,3 A 5P ( ) - D 0,3 A test winding 391 S0 D S0 D KOKM 072 A 10 for REJ 603* Terminals Ratio Burden lass Turns of the winding 14,4/0,075 A 0,1 VA 10P D 0,288 A test winding 50 D KOKM 072 A 10 for REJ 603* Terminals Ratio Burden lass Turns of the winding 28,8/0,075 A 0,1 VA 5P D 0,288 A test winding 100 D KOKM 072 A 10 for REJ 603* Terminals Ratio Burden lass Turns of the winding 57,6/0,075 A 0,1 VA 5P D 0,288 A test winding D KOKM 072 A 10 for REJ 603* Terminals Ratio Burden lass Turns of the winding 115,2/0,075 A 0,1 VA 5P D 0,288 A test winding 0 D *or other non relays e.g. WI 29

30 Overall dimensions 60 Ø 6.5 Outside dimension of T s = = 70 R Ø onnection diagram for ratio 14,4/0,075 A 28,8/0,075 A 57,6/0,075 A 115,2/0,075A L1 L2 L gn/ge gn/ge D D D Flag indicator Energiearme / low energy FI+ FI- T+ T- Extrenal power source 230V 115V N N 30 WI1

31 Outside dimension of T s 60 Ø = 100 = 115 R Ø onnection diagram for ratio 14,4-41,1/0,3 A 117,4-335/0,3 A L1 L2 L3 S0 D S0 D S0 D REMOTE TRIP 230 V A POWER SUPPLY 230 V A MPRB 31

32 REJ603 L3 D L2 D L1 D N E Trip oil External Input T(+) T(-) BI BI Product number Type of T Primary current Ipn [A] Secondary current Isn [A] 1YMA183190R0001 KOKM072A10 14,4 A 0,075 A for REJ T2 1YMA183190R0002 KOKM072A10 28,8 A 0,075 A for REJ T3 1YMA183190R0003 KOKM072A10 57,6 A 0,075 A for REJ T4 1YMA183190R0004 KOKM072A10 115,2 A 0,075 A for REJ T5 1YMA183190R0005 KOKM072A10 117,4-335 A 0,3 A 1YMA183190R0006 KOKM072BA10 14,4-41,1 A 0,3 A Order example KOKM 072A10 (1YMA183190R0003) ; 57,6/0,075 A/A ; 0,1 VA ; 5P ; I th = ka/1s ; IE ; 21 pcs 32

33 Special urrent Transformer, indoor type KORI 072 GH 8 KORI 072 GH 8 - low voltage current instrument transformer, without primary conductor. KORI 072 GH 8 current transformers can be assembled on the bushing with their own insulation. Transformers of this type series enable the protection and are designed for use in indoor installations. The KORI transformers are designed as one transformer ratio or with more ratio having the possibility to be reconnectable on the secondary side. Assembly procedure of the transformers on the bushings in Unigear 550 is exactly specified. All the transformers meet the specifications of relevant standards, i.e. the IE Table 15. Technical parameters Type KORI (low voltage current transformer for medium voltage application) Highest voltage for equipment U m [ kv ] 0.72 Power frequency test voltage, 1 min. [ kv ] 3 Rated insulation level [ kv ] 0,72 / 3 / - Rating frequency f n [ Hz ] 50 Rated primary current [ A ] 1600 to 2500 Rated secondary current [ A ] 1 or 5 Rated short-time thermal current I th 3s. [ ka ] 50.0 Rating peak current I dyn [ ka ] Accuracy classes [ ka ] 50 Burden [ VA ] 10, 15,, 25 or 30 Highest voltage of a system [ kv ] kv by using T ROD Flammability class KORI 072 GH 8 current transformers are designed for switchgear type Unigear 550 and have the following dimensions. B 33

34 90 4x Ø Ø I pn [ A ] I sn [ A ] Burden [ VA ] lass [ - ] Rating Plate Note: 1) Every other parameters have to be agreed with the manufacturer and will be considered on special basis. 2) Reconnectable variants are also possible, but need to be examined on special basis (according to customer s requirement and the agreement with manufacturer). 34

35 able urrent Transformers, outdoor type KOKU KOKU - current transformers are suitable for measuring of phase currents. An uninsulated busbar or cable serves as the primary conductor. Series KOKU current transformers can also be used for measuring the phase current at voltages even higher than 0,72 kv (for KOKU 072 G4) or 1,2 kv (for KOKU 1), if the insulation of the primary conductor fulfils the respective standards for the operating voltage. The secondary winding and ring shaped iron core is cast in resin which has good electrical and mechanical properties. Table 16. Technical data Transformer type KOKU 072 G4 KOKU 1 Rated voltage U m [ kv ] 0.72 (1) 1.2 (1) Power frequency test voltage U p (1 min) [ kv ] 3 6 Lighting test voltage U pp [ kv ] - - Frequency f n [ Hz ] 50 lub 60 Max. primary current I pn [ A ] Rated secondary current I sn [ A ] 1 lub 5 Rated thermal current I cont [ A ] 1,2 x I pn (2) Short-time withstand current I th (1 sek) [ ka ] 60 x I pn (3) Peak withstand current I dyn [ ka ] 2,5 x I th (4) Secondary terminals For 6 mm 2 conductor Operating temperature range [ ] Transport and storage [ ] Electrical standards IE, VDE, ANSI, BS, AS, AN (1) The insulation level of the primary conductor determines the maximum operating voltage. (2) Max. I cont for KOKU 072 G4 I cont = A, for KOKU 1 I cont = A (3) Max. I th = 100 ka, (4) Max. I dyn = ka 35

36 Table 17. Standards parameters for KOKU 072 G4 Type Window diameter Total height Hole center heigh Ratio Accuracy lass Burden Short circuit current I th, 3s Standard [mm] [mm] [mm] [A] [VA] [ka] KOKU 072 G / IE Note: If you need other electrical parameters than given in tables please contact with our sales department. Warranty The factory grants 24 months of warranty from the day of put to use of the transformer, but no longer than 36 months from the day of sell. The warranty concerns only manufacturing defects and does not include defects arose because of: improper transport, improper storage, not abiding of the instruction before installing and during operating of the transformers, improper selection of the transformer for the electric power system. Ordering data The order should contain following data: - type of current transformer - rated primary current / rated secondary current [A/A] - rated burden and accuracy class for each winding [VA] - short-time thermal current Ith - standard - quantity Order example KOKU 1 RL16 ; 0/1 A/A ; VA ; 50 ; Ith = 60xIpn/1s ; IE ; 6 pcs Table 18. KOKU 1 Example KOKU 1 KL 12 Transformers width 12 = 1mm (possibility - 8, 10, 12, 14, 16, 18,, 22, 24,...30) Outer diameter L = 270 mm Hole diameter K = 1 mm Rate voltage 1 = 1,2 kv Type KOKU - indoor use, (KOKM - outdoor use) Outer diameter [mm] Hole diameter [mm] A B D E F G H K N R S U W X Y Z Drawing asting height [mm] Total height [mm] Hole center height [ mm] 148 F 186 H J 235 K 250 L 270 M 2 P 3 T 450 W KOKU Range of transformers width KOKU 1_F_ KOKU 1_H_ KOKU 1_J_ KOKU 1_K_ KOKU 1_L_ KOKU 1_M_ KOKU 1_P_ KOKU 1_T_ KOKU 1_W_

37 Overall dimensions KOKU KOKU 1_F_ B ( ) ±2 B (...100) ± Pk 16 Pr 22,5 Pg IP44 B ( ) ±2 B () ± B (160) ±2 ±2 B (60...1) Pk 16 Pr 22,5 PG ±2 ± IP44 Di +2 0 ± ± ±3 213±2 17 Di 186 M8 18 M8 Di = A B D E F 148 KOKU Di = A B D E F G H KOKU 1 _ F B = = B = = KOKU 1_H_ KOKU 1_J_ ±2 B () 11 ±2 B ( ) Pk 16 Pr 22,5 Pg IP44 Di +3 0 ±2 138 M ±3 235 ±2 170 Di = A B D E F G H K KOKU 1 _ H _ B = =

38 KOKU 1_K_ KOKU 1_L_ B ± ± ±2 B ±2 14 M M Pk 16 Pr 22,5 Pg 16 IP44 Pk 16 Pr 22,5 Pg IP44 15 Di ± ± ±2 15 Di ±2 158 Di = A B D E F G H K N M8 270 KOKU 1 _ K _ M8 Di = A B D E F G H K N R S KOKU 1 _ L _ B = = B = = KOKU 1_M_ KOKU 1_P_ 38

39 KOKU 1_T_ KOKU 1_W_ Note: Without fixing base. Fix directly to floor. Note: Without fixing base. Fix directly to floor. KOKU 072 G M12X60 Rating plate able, length 1,6 m 1 = 1 = ,3 39

40 Special urrent Transformer, outdoor type KODI KODI - bushing current transformer type KODI, is predicted for supplying metering appliances as well as protection devices, at the maximum nominal voltage 0,72 kv and nominal frequency 50 or 60 Hz. Transformer can be mounted in outdoor conditions on the top of distribution transformers straight on the bushing. The nominal temperature of transport and storage for that outdoor transformer is in the range -35 0,+ 0. Secondary circuits should be mounted using copper wires with the cross section at least 2,5mm 2.onnecting schemes for current and energy measurement are shown on the Fig. 1 and 2. Overall dimensions F D E J H G I ØK ØB ØA M ØL type of T diameter KODI 1 PU 7 KODI 1 MN 7 KODI 1 KK 7 KODI 1 HH 7 KODI 1FG 7 A B D E F G H I J K L M

41 Measurment diagram Fig.1. Energy measurement diagram. Fig.2. urrent measurement diagram. 41

42 urrent Transformers type KOLT (for Oil-immersed Transformers) KOLT - current transformers type KOLT have neither housing nor primary winding. Under operating conditions the primary winding is the power transformer s bushing insulator, which is at the same time the main insulation of the current transformer. The secondary windings are evenly wound on the circumference of the toroidal core. Secondary winding insulation is made of polyester tape (torlen). urrent transformers with the weight of approx. 100kg or more consist of several parts to facilitate both transport and installation. Each separate part contains the following information: a serial number which coincides with the one stated on the rating plate as well as markings of primary and secondary winding terminals. Table 18. Technical data Type KOLT Primary current range I pn [A] 100A A Rated secondary current I sn [A] 1A 5A Insulation level 0.72 / 3 / - Range of rated output Sn [VA] 1VA - 90VA Number of windings 1-4 onformity with Standards IE, PN-EN, SEV, VDE, ANSI, BS, AN, SA, GOST Accuracy class acc. to IE 0.2s; 0.5s; 0.2; 0.5; 1; 3; 5; 5P; 10P; PX FS 5; 10 ALF 5; 10; 15; ; 25; 30 Rated frequency f [Hz] 50, 60 Short-time withstand thermal current I (1 sek) th [A] 100xI pn max. 100kA Insulation class acc. to I dyn [A] 2,5xI th max. 250kA Klasa izolacji wg IE B Min. inside diameter f A [mm] min. 30 mm depending on parameters Max. outside diameter f B [mm] max. 900 mm depending on parameters Height h [mm] h [mm] max. 900 mm depending on parameters Length of leads D [mm] D [mm] 1m, other length at the client s request Transformers with other dimensions and parameters are available at the client s request. 42

43 Versions available - single phase - with one or several windings - with one or several tappings - insulation cotton tape + impregnating varnish - without housing - without primary winding KOLT x 235 x 60 Aplication The current transformers type KOLT are suitable for mounting inside power transformers and are suitable for operating immersed in oil, under conditions of moderate and tropical climate. These current transformers are designed for supplying measurement and protection circuits of power systems operating under rated frequency of 50 Hz. Marking Each current transformer is fitted with rating plate in accordance with IE Standard. Values of rated voltage and rated power frequency test voltage of insulation stated on the rating plate relate to the insulation of secondary windings. Primary and secondary terminals are directly marked on the current transformer. Transport While transported current transformers must be protected against humidity and heavy shocks. urrent transformers with the weight exceeding 50kg and current transformers especially sensitive to shocks are transported on wooden pallets. Installation During installation of current transformers observe the following instructions: - Secondary winding marked 1-1 should be placed on the top; - Pay special attention to keep the same polarization for all parts of the current trans former ( markings);. - Avoid shocks. KOLT x260x45 ompliance with Standards urrent transformers meet the requirements of the following standards: IE At the client s request we manufacture current transformers meeting the requirements of SEV, VDE, ANSI, BS, AN, SA, GOST Standards Warranty The factory grants 24 months of warranty from the day of put to use of the transformer, but no longer than 36 months from the day of sell. The warranty concerns only manufacturing defects and does not include defects arose because of: improper transport, improper storage, not abiding of the instruction before installing and during operating of the transformers, improper selection of the transformer for the electric power system. 43

44 Ordering The order must contain the following: - name and type of current transformer - rated primary current / rated secondary current I pn /I sn [A] - short-time thermal current, 1 s I th [ka] - rated output power and accuracy class of each winding Sn [VA] - limit transformer dimensions (min. inside diameter, max. outside diameter, max. height) - length of leads - standard - quantities. Order example urrent transformer type KOLT 1/5/1/1 A I th = 72 ka I. 15VA, class 0.5 F0 II. 60VA, class 55 III. 60VA, class 50 min. inside diameter A = 150 mm max. outside diameter B = 300 mm max. height h = mm length of leads 1,5 m Standard IE quantity 9 pcs. Overall dimensions 1S... 2S......S... 1S5 1S4 1S3 1 1 Rating plate Rating plate Rating plate Ø B D Ø A h 44