Electrical measuring instruments >> transformers industrial (KTPVSh, TA, TN, T-0,66, TSh-0,66, TP, TPP and others) >> current transformers >> 35kV voltage class
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Current transformer TPL-35 (TPL35, TPL 35)
Current transformer TPL-35 is designed to transmit the signal measurement data measurement devices, protection, automation, alarm and control circuits to isolate the secondary connections of high-voltage electrical installations AC.
Technical characteristics of the instrument current transformers TPL-35:
The number of secondary windings - 2;
Rated voltage - 35kV;
Maximum operating voltage instrument transformer current TPL-35 - 40.5 kV;
Rated frequency AC - 50Hz or 60Hz;
Rated secondary current of the current transformer unit TPL-35 - 1A, 5A;
Rated primary current - 300A, 400A, 600A, 800A, 1000A, 1500A;
Accuracy class of the instrument current transformer TPL-35:
- Secondary winding for measurement - 0,2 S, 0,2, 0,5 S, 0,5, 1;
- Secondary protection - 5P, 10P;
Rated secondary current transformer load device TPL-35 with a power factor:
- Cos φ = 1 - secondary winding for measurement - A · 1B, 2B · A · 2.5 A;
- Cos φ = 0,8 - secondary winding for measurement - 3V-50V · A · A;
- Cos φ = 0,8 - secondary protection - 3V-50V · A · A;
Rated current ratio of secondary winding device CT TPL-35 for protection - 10-26;
Nominal safety factor of instruments for the measurement of the secondary winding - 10;
Three-second thermal current instrument transformer current TPL-35:
- At rated primary current 300A - 12kA;
- At rated primary current 400A - 16kA;
- At rated primary current 600A - 24kA;
- At rated primary current 800A - 32kA;
- At rated primary current 1000A - 40kA;
- At rated primary current 1500A - 60kA;
Rated peak withstand current transformer unit TPL-35:
- At rated primary current 300A - 31kA;
- At rated primary current 400A - 41kA;
- At rated primary current 600A - 61kA;
- At rated primary current 800A - 82kA;
- At rated primary current 1000A - 102kA;
- At rated primary current 1500A - 153kA;
Test voltage instrument transformer current TPL-35:
- One-minute power frequency - 95kV;
- Lightning impulse full - 220 kW;
The estimated value of the resistance of the secondary winding device CT TPL-35 DC are listed in Table 1;
Table 1 Calculated values of the resistance of the secondary windings of the current transformer unit TPL-35 DC
Calculated values of the nominal current ratio of secondary winding for protection in terms of rated secondary load in accuracy classes for device 10P CT TPL-35 are shown in Table 2;
Table 2 Calculated values of the nominal current ratio of secondary winding for protection in terms of rated secondary load in accuracy classes for device 10P CT TPL-35
General view of the device shown in Figure 1;
Figure 1: General view of the instrument current transformer TPL-35
 Dimensions and weight of the device current transformer TPL-35 are shown in Table 3;
Table 3 Dimensions and weight of the device current transformer TPL-35
The transformers are manufactured in climatic design "UHL" and are intended for indoor use in:
Height above the sea level - no more than 1000 m.
- Ambient temperature with the heat the air inside the switchgear - from -60 ° C to +50 ° C;
- Environment explosive, without dust, reactive gases and vapors in concentrations destroy metal and insulation;
- Working position - any;
- Internal insulation casting, heat resistance class "B" and flammability class FH (PG) 1;
- Instruments earthquake resistant when exposed to earthquake intensity 8 points on the MSK-64 at the facility level above ground level up to 70m;
- Appliances intended to be sold in AS, with class security for 3H-001 NP-97 and 2 seismic category for NP-031-01;
- Devices comply with immunity to electromagnetic interference to influence the magnetic field of industrial frequency;
- Instruments CT-35 TPL conform to standards of industrial radio Class A, Group 1;
In current transformers may be used to account for the secondary windings, Class 0,2 S and 0,5 S with the value of the secondary load below 25% of nominal;
The minimum weight for the device current transformer windings TPL-35 accuracy class 0,2 S and 0,5 S is 1B · A;
The certificate on the current transformers with secondary windings for accounting accuracy classes 0,2 S and 0,5 S indicates the measured current and the angular error at rated secondary burden 1B · A;
Can manufacture transformers with different transformation ratios of secondary windings;
The manufacturer guarantees that the quality of the instrument current transformer TPL-35 technical requirements specifications provided the customer terms and conditions of storage, transportation, installation, operation, and its specified operational documentation.
Photos: TPL-35
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