KOLMA and IHDA Indoor Type Cable Current Transformers. Catalogue. Catalogue KOLMA 1 GB Medium Voltage. ABB Transmit KKOLMA 1 GB

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1 Catalogue KOLMA and IHDA Indoor Type Cable Current Transformers Catalogue KOLMA 1 GB Medium Voltage ABB Transmit 1 KKOLMA 1 GB

2 KOLMA and IHDA Indoor Type Cable Current Transformers Index Description... 3 Technical data and ordering information Cable Current Transformers type KOLMA... 4 How to select the correct residual current transformers... 4 Technical data... 4 Installation... 5 Number of turns and terminal markings... 5 Current rations and rated burdens for accuracy class 10 P Ordering data... 6 Current transformers type IHDA... 7 Selection table... 7 Technical data... 7 Special current transformers KOKM and KOKU Accessories Ordering data Overall dimensions KOLMA, KOLA IHDA ABB Transmit KOLMA 1 GB

3 KOLMA and IHDA Indoor Type Cable Current Transformers Description Transformers, KOLMA_ and KOLA_ are suitable for the measurement of the sum of three-phase 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 earthfault current and a corresponding current flows in the secondary. IHDA 05 current transformers are suitable for measuring of phase currents in low voltage switchgear. An uninsulated busbar or low voltage cable serves as the primary conductor. 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. ABB Transmit 3 KKOLMA 1 GB

4 Cable Current Transformers type KOLMA Technical data and ordering information 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 P1x - P2x) of the transformer. The test winding is rated for 6 A max. continuous current. Table 1. Selection of residual current transformers Type Window diam. Construction Weight mm 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 180 Ring core, multi-cap secondary 11.5 KOLMA 06 D2 180 Ring core 11.4 KOLA 06 B2 100 Split ring core 6.0 KOLA 06 D2 180 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 Cable current transformers, types KOLMA_ Rated voltage 0.72 kv (1) Insulation test voltage 50 Hz 1 min 3 kv (IEC 185) Frequency 50 Hz (60 Hz) Rated thermal current 1.2 x I pn Short-time withstand current I th 1 s 60 x I pn (2) Peak withstnad current I dyn 2.5 x I th Secondary terminals For 6 mm 2 conductor Operating temperature range o C (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. 4 ABB Transmit KOLMA 1 GB

5 Cable Current Transformers type KOLMA Technical data and ordering information Installation The KOLMA-types must be installed before the cables and cable terminations are connected. INST 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. Cable 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 D1 KOLMA 06 A2 KOLMA 06 B2 KOLMA 06 D2 KOLA 06 B2 KOLA 06 D2 KOLMA ABB Transmit 5 KKOLMA 1 GB

6 Cable current transformers type KOLMA Current rations and rated burdens Technical data and ordering information Table 2. Current ratios and rated burdens for accuracy class 10 P 10 Design data. Types KOLMA 06 A1 and KOLMA 06 D1 Current ratio Secondary terminals Burden / VA Type A KOLMA 06 A1 KOLMA 06 D1 50/1 S4 - S /1 S3 - S /1 S1 - S /1 S1 - S /5 S1 - S /5 S2 - S /5 S1 - S /5 S4 - S /5 S3 - S /5 S1 - S /5 S3 - S /5 S1 - S Table 3. Current ratios and rated burdens for accuracy class 10 P 10 Design data. Types KOLMA 06 A2, KOLMA 06 B2, KOLMA 06 D2 and KOLA 06 B2 Type Current ratio Secondary terminals Burden A VA Openable residual current transformers, type KOLA 06 B2 complete with fixing base KOLMA-ZK 1 and terminal cover KOK-ZAX 14. KOLMA 06 A2 100/1 S1 - S2 2.0 KOLMA 06 B2 100/1 S1 - S2 2.5 KOLMA 06 D2 100/1 S1 - S2 2.0 KOLA 06 B2 100/1 S1 - S2 2.0 KOLA 06 D2 100/1 S1 - S2 2.0 Ordering data quantity type Accessores shall be ordered separately. 6 ABB Transmit KOLMA 1 GB

7 Current transformers type IHDA 05 Technical data and ordering information Current transformer series IHDA 05 for measuring of phase currents IHDA 05 current transformers are suitable for measuring of phase currents in low voltage switchgear. An uninsulated busbar or low voltage cable serves as the primary conductor. Series IHDA 05 current transformers can also be used for measuring the phase current at voltages even higher than 0.72 kv, if the insulation of the high voltage primary conductor fulfils the respective standards for the operating voltage. Selection of current transformers Transformer selection is made according to tables 4 and 5. Ordering On order please mention quantity, type and class. Example: 3 pcs IHDA 05 B1-150/1, class 3 Technical data Rated voltage 0.72 kv (1) Insulation test voltage 50 Hz 1 min 3 kv (IEC 185) Frequency 50 Hz (60 Hz) Rated thermal current 1.2 x I pn Short-time withstand current I th 1 s 60 x I pn (2) Peak withstnad current I dyn 2.5 x I th Secondary terminals For 6 mm 2 conductor Operating temperature range o C (1) The insulation level of the primary conductor determines the maximum operating voltage. ABB Transmit 7 KKOLMA 1 GB

8 Current transformers type IHDA 05 Technical data and ordering information Table 4. Selection of current transformers. Secondary current I sn = 1 A Rated frequency 50 Hz Performance values according to IEC 185 < < F s = F a = Instrument security factor Accuracy limit factor Type Window Prim. Burden (VA) Weight diam. curr. Class and Fs or Fa IHDA mm A 0.5 Fs 1 Fs 3 Fs 10P Fa kg 05A1 100/ A1 150/ A1 200/ A1 300/ A1 400/ A1 500/ A1 600/ B1 100/ B1 150/ B1 200/ B1 300/ B1 400/ B1 500/ B1 600/ B1 800/ C1 400/ C1 500/ C1 600/ C1 800/ C1 1000/ D1 600/ D1 800/ D1 1000/ D1 1200/ D1 1500/ D1 1600/ E1 1500/ E1 1600/ E1 2000/ Cable current transformers with one secondary winding, typ IHDA_ ABB Transmit KOLMA 1 GB

9 Current transformers type IHDA 05 Technical data and ordering information Table 5. Selection of current transformers. Secondary current I sn = 5 A Rated frequency 50 Hz Performance values according to IEC 185 < < F s = F a = Instrument security factor Accuracy limit factor Type Window Prim. Burden (VA) Weight diam. curr. Class and Fs or Fa IHDA mm A 0.5 Fs 1 Fs 3 Fs 10P Fa kg 05A1 100/ A1 150/ A1 200/ A1 300/ A1 400/ A1 500/ A1 600/ B1 100/ B1 150/ B1 200/ B1 300/ B1 400/ B1 500/ B1 600/ B1 800/ B1 1000/ B1 1200/ C1 400/ C1 500/ C1 600/ C1 800/ C1 1000/ C1 1200/ C1-1500/ C1-1600/ D1 600/ D1 800/ D1 1000/ D1 1200/ D1 1500/ D1 1600/ E1 1500/ E1 1600/ E1 2000/ E1 2400/ E1 2500/ E1 3000/ ABB Transmit 9 KKOLMA 1 GB

10 Special current transformers Technical data and ordering information Special current transformers KOKM 06_ and KOKU 06_ Special indoor type current transformer type KOKM 06 J2. Window size 300 x 500. Examples of some special transformer. Left: KOKM 06 for indoor use. Right: KOKU 06 for outdoor use. We also manufacture current transformers cast in epoxy resin, to meet special demands, both for outdoor and indoor use. Enquires for these special transformers should mention the following data: 1. Quantity 2. Current ratio I pn /I sn (A) 3. Burden (VA) 4. Accuracy class 5. Window dimension (mm) 6. Other limiting data such as instrument security factor, dimensions of transformer, fixing of transformer (fixing base) etc. 7. Indoor or outdoor use Maximum service voltage for these transformers is 0.6 kv. The insulation of the primary conductor determines the highest permissible system voltage. 10 ABB Transmit KOLMA 1 GB

11 Accessories Ordering data Ordering data for accessories - quantity - type Table 6. Selection of accessories for KOLMA_ and 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 Table 7. Selection of accessories for IHDA_ Type Description Suitable for IHDA current transformer KOK-ZAX 12 Fixing base (1) A1 KOK-ZAX 13 Fixing base (1) B1...E1 KOK-ZAX 14 Secondary terminal cover (2) B1...E1 (1) The fixing base shall be fixed to the bottom inserts of the current transformer by means of screws equipped with spring washers which are included in the package. The fixing base can be mounted either in line with the current transformer of transversely. (2) The secondary terminal cover shall be mounted on the secondary terminals of the current transformer. The cover includes a bushing sleeve. There are two alternative holes for the outgoing wiring. The cover is sealable. ABB Transmit 11 KKOLMA 1 GB

12 KOLMA Overall dimensions KOLMA 06 A1 KOLMA 06 A2, B2 06A2 06A1 Type A B C D KOLMA 06 A B KOLMA 06 D1, D2 06D1 12 ABB Transmit KOLMA 1 GB

13 KOLA Overall dimensions KOLA 06 B2 KOLA 06 D2 06D2 06B2 ABB Transmit 13 KKOLMA 1 GB

14 IHDA Overall dimensions IHDA 05 A1 IHDA 05 B1, C1, D1, E1 IHDA A1 IHDAB1 Type Dims./mm IHDA A B C D 05 B C D E ABB Transmit KOLMA 1 GB

15 IHDA Overall dimensions Base for IHDA 05 A1 Type KOK-ZAX 12 Base for IHDA 05 B1, C1, D1, E1 Type KOK-ZAX 13 05B1 05A1 ABB Transmit 15 KKOLMA 1 GB

16 IHDA Overall dimensions Terminal cover for IHDA 05 B1, C1, D1 and E1. Sealable. KOK-ZAX 14 KOKZAX IHDA.TBL Type IHDA 05 B1 05 C1 05 D1 05 E1 Dim. H mm ABB Transmit KOLMA 1 GB

17 ABB Transmit 17 KKOLMA 1 GB

18 Catalogue KOLMA 1 GB 94-11/97-03 ABB Transmit Oy MV Systems Division Instrument Transformers P.O. Box 613, FIN Vaasa, Finland Phone Fax Ykkös-Offset Oy 3000, ABB Transmit KOLMA 1 GB

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