TZLU-125
Residual current transformer of ТЗЛУ(TZLU)-125, ТЗЛУ(TZLU)-125-1 type is designed to supply protection from short circuit to earth of individual conductors of a three-phase cable by transforming zero-sequence currents arisen and installed on the cable.
Transformers are manufactured in the performance category U of the placement category 2 in accordance with GOST 15150-69, and designed to work under the following conditions:
- altitude above sea level - not more than 1000 m;
- relative humidity of air - not more than 98% at 30 ° С;
- the upper operating value of the ambient air temperature is plus 50 ° C;
- the lower operating value of ambient air temperature is minus 45 ° С;
- the environment shall be non-explosive, containing no dust, reactive gases and vapors in concentrations that destroy metal coatings and insulation (atmosphere type II according to GOST 15150-69);
- position of transformers in space - any.
Conditions for storage of transformers in terms of the effect of climatic factors in packaging and transport packaging - according to the storage conditions for group 5 under GOST 15150-69, without package - according to the storage conditions for group 2.
ТЗЛУ(TZLU)-125 transformers have a transformer ratio of the main winding - 30/1, 60/1 and 6/1 of protection monitoring auxiliary winding, which is designed to test the operation of the relay protection.
An example of recording a symbol for the transformer ТЗЛУ(TZLU)-125, ТЗЛУ(TZLU)-125-1 with a transformation ratio of 30/1 and a transformer with a transformation ratio of 60/1 at a rate primary current of 1A:
Current transformer ТЗЛУ-125-30-60/1;
Current transformer ТЗЛУ-125-1-30/1;
Current transformer ТЗЛУ-125-1-60/1.
Transformers can be supplied with a different transformation ratio at the request of the customer.
The winding of the transformers is made on a core made of a nanocrystalline alloy. This provides a large linear dynamic range of winding current and angle characteristics. At the same time, the long-term stability of the characteristics during the whole service life of the transformer and the stability of the core to magnetization are provided (from unipolar pulse currents of the three-phase cable). In addition, the safety factor of the devices -not more than 3, which significantly reduces the emergency overload of the measuring devices connected to the secondary winding.
The use of these transformers provides a reduction in operating costs for consumers.
Residual current transformer of ТЗЛУ(TZLU)-125, ТЗЛУ(TZLU)-125-1 type is designed to supply protection from short circuit to earth of individual conductors of a three-phase cable by transforming zero-sequence currents arisen and installed on the cable.
Transformers are manufactured in the performance category U of the placement category 2 in accordance with GOST 15150-69, and designed to work under the following conditions:
- altitude above sea level - not more than 1000 m;
- relative humidity of air - not more than 98% at 30 ° С;
- the upper operating value of the ambient air temperature is plus 50 ° C;
- the lower operating value of ambient air temperature is minus 45 ° С;
- the environment shall be non-explosive, containing no dust, reactive gases and vapors in concentrations that destroy metal coatings and insulation (atmosphere type II according to GOST 15150-69);
- position of transformers in space - any.
Conditions for storage of transformers in terms of the effect of climatic factors in packaging and transport packaging - according to the storage conditions for group 5 under GOST 15150-69, without package - according to the storage conditions for group 2.
ТЗЛУ(TZLU)-125 transformers have a transformer ratio of the main winding - 30/1, 60/1 and 6/1 of protection monitoring auxiliary winding, which is designed to test the operation of the relay protection.
An example of recording a symbol for the transformer ТЗЛУ(TZLU)-125, ТЗЛУ(TZLU)-125-1 with a transformation ratio of 30/1 and a transformer with a transformation ratio of 60/1 at a rate primary current of 1A:
Current transformer ТЗЛУ-125-30-60/1;
Current transformer ТЗЛУ-125-1-30/1;
Current transformer ТЗЛУ-125-1-60/1.
Transformers can be supplied with a different transformation ratio at the request of the customer.
The winding of the transformers is made on a core made of a nanocrystalline alloy. This provides a large linear dynamic range of winding current and angle characteristics. At the same time, the long-term stability of the characteristics during the whole service life of the transformer and the stability of the core to magnetization are provided (from unipolar pulse currents of the three-phase cable). In addition, the safety factor of the devices -not more than 3, which significantly reduces the emergency overload of the measuring devices connected to the secondary winding.
The use of these transformers provides a reduction in operating costs for consumers.
- Parameter name Parameter value
- Highest voltage for equipment, Um, [kV] 0,8
- Rated primary current, Ipn, [А] 30, 60
- Rated secondary current, Isn, [A] 1
- Rated frequency, Fn, [Hz] 50*, 60
- Power-frequency test voltage, [kV] 3
- Transformation ratio, Ipn/Isn 30/1, 60/1
- Reconnectable versions +
Похибки при коефіцієнті трансформації 30/1 А
Похибки при коефіцієнті трансформації 60/1 А
Похибки при коефіцієнті трансформації 150/5 А
Похибки при коефіцієнті трансформації 300/5 А
