INSTRUMENT TRANSFORMERS INSTRUMENT TRANSFORMERS

Transcription

1 INSTRUMNT TRNSORMRS INSTRUMNT TRNSORMRS

2 ONTNTS MIUM VOLT INSTRUMNT TRNSORMRS > INOOR URRNT TRNSORMRS 01 /03 02 /05 04 /07 06 Technical Information for urrent Transformers Support urrent Transformers 12, 24 Support urrent Transformers 36, 36-T Support urrent Transformers K24, K36 > INOOR VOLT TRNSORMRS 08 /11 10 /13 12 /15 14 /17 16 /09 Technical Information for Voltage Transformers Single Pole Voltage Transformers V12, V24, V36 Single Pole Voltage Transformers VK36 ouble Pole Voltage Transformers 2V12, 2V24 Single Pole Voltage Transformers with use V12, V24, V36

3 01 INORMTION OUT T S OPRTION O URRNT TRNSORMRS OPRTION ONITIONS OR URRNT TRNSORMRS 1. When the secondary terminals are connected to the measuring or protection devices, one of the terminals should be earthed for safety as seen in IUR T-1 2. The secondary circuit of a current transformer must not be operated open-circuited 3. The secondary winding of a current transformer which will not be used must always be short-circuited and earthed as seen in IUR T-2 4. or the transformer with reconnectable and/or tapped secondaries, unused terminals must be left open as seen in IUR T-3 5.The current transformers which have capacitive divider tap (k) must be connected to the indicator. If the tap will not be used then it must be earthed as seen in IUR T-4 P1 P2 S1 S2 P1 P2 1S1 Unused secondary taps must be left open. 1S2 S1 S2 IUR T-2 k Unused k tab must be earthed. Left open 2 IUR T-1 S2 1 IUR T-3 Test Voltages ighest voltage for equipment Um (r.m.s.) Rated power-frequency withstand voltage (r.m.s.) Rated lightning impulse withstand voltage (peak) , IUR T-4

4 INOOR URRNT TRNSORMRS SUPPORT TYP URRNT TRNSORMRS kv lock esign Standard: I /6, V, NSI, OST On request with capacitive layer On request with barrier TNIL T Rated data Operating voltage (maximum) 12-17,5 24 Test voltages 28/75-38/95 50/125 Rated frequency [z] Maximum rated primary current [] Secondary rated current [] 1 or 5 Rated short-time thermal current Ith [1s] [k] max. 60 [1000 x In] Rated dynamic current Idyn [k] max. 120 [2,5 x Ith] Weight [approx.] [kg] 50 or [Icont 1 x In]

5 03 PROUT OVRVIW IMNSIONS PRIMRY ONNTION TRMINLS M 12,23 deep 600 <= In < M 12,23 deep 40 L P2 80 K P <= In <= imensions (mm) Other specifications available on request 32

6 INOOR URRNT TRNSORMRS SUPPORT TYP URRNT TRNSORMRS 36 kv lock esign Standard: I /6, V, NSI, OST On request with capacitive layer On request with barrier TNIL T T1 36-T3 Rated data Operating voltage (maximum) 36 Test voltages 70/170 Rated frequency [z] 50 or 60 Maximum rated primary current [] 3000 Secondary rated current [] 1 or 5 Rated short-time thermal current Ith [1s] [k] max. 60 [max x In] Rated dynamic current Idyn [k] max. 120 [2,5 x Ith] Weight [approx.] [kg] Other specifications available on request

7 05 PROUT OVRVIW IMNSIONS PRIMRY ONNTION TRMINLS M12,23 deep ø2 In <= M12,23 deep 600< In < L P2 40 K P1 M12,23 deep 1500 <= In <= T1 36-T3 imensions (mm) ,5 217,5 217,5 217,5 Other specifications available on request 32

8 INOOR URRNT TRNSORMRS SUPPORT TYP URRNT TRNSORMRS kv Standard: I /6, V, NSI, OST TNIL T K24 K36 Rated data Operating voltage (maximum) Test voltages 50/125 70/170 Rated frequency [z] 50 or 60 Maximum rated primary current [] 1500 Secondary rated current [] 1 or 5 Rated short-time thermal current Ith [1s] [k] max. 60 [max x In] Rated dynamic current Idyn [k] max. 120 [2,5 x Ith] Weight [approx.] [kg] Other specifications available on request

9 07 PROUT OVRVIW IMNSIONS PRIMRY ONNTION TRMINLS M 12,23 deep 120 ø28 In <= M 12,23 deep K P1 L P2 600< In <1500 K24 K36 imensions (mm) Other specifications available on request 32

10 INOOR VOLT TRNSORMRS INORMTION OUT T S OPRTION O VOLT TRNSORMRS OPRTION ONITIONS OR POTNTIL TRNSORMRS 1. When the secondary terminals are connected to the measuring or protection devices, one of the terminals should be earthed for safety as seen in IUR VT-1 2. The base plate must be earthed. 3. The secondary circuits must not be short-circuited during operation. Otherwise the voltage transformers will be thermally destroyed. 4. If any of the secondary windings of a voltage transformer, used for the purpose of measuring, will not be used then it must be left open with one terminal connected to earth as seen in IUR VT-2. owever, even if the open-delta windings are not to be used for detection of earth faults, they must be connected in an open delta circuit and an appropriate resistor (depending on the voltage and thermal power rating of the secondary) must be connected and open-delta circuit must be earthed only at one point as seen on IUR VT-4. Please refer to the technical recommendations below. 5. or single phase transformers, the neutral terminal of the primary N must be earthed in the earthed (neutral) systems as seen in IUR VT-3 Other important points and notes When using single pole insulated inductive voltage transformers, it is very important to be aware that, if a circuit is being closed or during the decaying period of an earth fault, ferroresonance may occur. erroresonance can lead to the overheating and thermal destruction of the voltage transformer or high levels of voltages may be induced. In general, ferroresonance can be eliminated by the use of an appropriate resistor. The resistor is placed as a burden in open-delta circuit formed by three voltage transformers delta windings. The open-delta circuit must always be earthed only at one point as seen in IUR VT-4. The open-delta connection can also be used for earth-fault monitoring with appropriate devices. s the number of cable systems is increasing in the energy distribution systems, the protection of voltage transformers have become very important for the uninterrupted operation of the system without any failure and/or down time. or that reason, L is always recommending the use of open-delta windings in single phase inductive voltage transformers. The use of open-delta windings may not be sufficient for the protection of voltage transformers by itself in some cases. n energy systems design engineer shall always use proper surge arresters, avalanche diodes, limiters and/or their combinations for the survivability of the distribution system after a fault or disturbance.

11 09 R S a N a b n V IUR VT-1 IUR VT-3 da dn dn a da arth fault winding resistor b da dn IUR VT-2 IUR VT-4 Test Voltages ighest voltage for equipment Um (r.m.s.) Rated power-frequency withstand voltage (r.m.s.) Rated lightning impulse withstand voltage (peak) ,

12 INOOR VOLT TRNSORMRS SINL POL VOLT TRNSORMRS kv Single Pole Insulated lock esign Standard: I , I 61869, V, NSI, OST TNIL T V12 V24 V36 Rated data ighest voltage for equipment, Um [r.m.s.] 12-17, Test voltages 28/75-38/95 50/125 70/170 Rated frequency [z] Rated primary voltage, Un [max.] Secondary voltage [V] 100 / 3 or 110 / 3 or 120 / 3 Rated burden in class [V] Maximum rated burder for protection purpose in class 3P/6P [V] 100 Thermal limiting current for earth fault detection winding [] 6 50 or 60 12/ 3-15/ 3 Rated voltage factor [8h] Weight [approx.] 24/ 3 36/ 3 1,9 Un [kg] Other specifications available on request

13 11 PROUT OVRVIW IMNSIONS V12 V24 V36 imensions (mm)

14 INOOR VOLT TRNSORMRS SINL POL VOLT TRNSORMRS 36 kv Single Pole Insulated Standard: I , I , V, NSI, OST TNIL T VK36 Rated data ighest voltage for equipment, Um [r.m.s.] 36 Test voltages 70/170 Rated frequency [z] 50 or 60 Rated primary voltage, Un [max.] 36/ 3 Secondary voltage [V] 100 / 3 or 110 / 3 or 120 / 3 Rated burden in class [V] Maximum rated burder for protection purpose in class 3P/6P [V] 100 Thermal limiting current for earth fault detection winding [] 6 Rated voltage factor [8h] Weight [approx.] 1.9 Un [kg] 55 Other specifications available on request

15 13 PROUT OVRVIW IMNSIONS VK36 imensions (mm)

16 INOOR VOLT TRNSORMRS OUL POL VOLT TRNSORMRS kv ouble Pole Insulated lock esign Standard: I , I , V, NSI, OST TNIL T 2V12 2V24 Rated data ighest voltage for equipment, Um [r.m.s.] Test voltages 28/75 50/125 Rated frequency [z] Rated primary voltage, Un [max.] Secondary voltage [V] 100 or 110 or 120 Rated burden in class [V] Maximum rated burder for protection purpose in class 3P/6P [V] or Rated voltage factor [8h] Weight [approx.] 24 1,2Un [kg] Other specifications available on request

17 15 PROUT OVRVIW IMNSIONS L K 2V12 2V24 imensions (mm) O S K L

18 INOOR VOLT TRNSORMRS SINL POL VOLT TRNSORMRS kv With use Single Pole Insulated lock esign Standard: I , I , V, NSI, OST TNIL T V12 V24 V36 Rated data ighest voltage for equipment, Um [r.m.s.] 12-17, Test voltages 28/75-38/95 50/125 70/170 Rated frequency [z] Rated primary voltage, Un [max.] Secondary voltage [V] 100 / 3 or 110 / 3 or 120 / 3 Rated burden in class [V] Maximum rated burder for protection purpose in class 3P/6P [V] 100 Thermal limiting current for earth fault detection winding [] 6 50 or 60 12/ 3-15/ 3 Rated voltage factor [8h] Weight [approx.] 24/ 3 36/ 3 1,9 Un [kg] Other specifications available on request

19 17 PROUT OVRVIW IMNSIONS K V12-S V24-S V36-S imensions (mm) K

20 K_N_IT_O_12R02 L lektrik Sanayi ve Ticaret.Ş. Ramazanoğlu Mah. Transtek ad. No: 6 Pendik İstanbul, TURKY T info@alce-elektrik.com.tr