Overview:

The low-voltage protection type current transformer is mainly applied to the relay protection circuit which passes through the busbar. The product is developed for the protection system to detect the short circuit fault, and has different accuracy level and accurate limit coefficient. It is widely used in low voltage distribution protection system.

Features:

FL2-0.66III current transformer, vertical square hole, can wear copper 1 ~ 3 bus, not only has the characteristics of type I, II, and can be used for power supply system measurement of energy with , And can be used with the current relay for protection.

FL2-0.66III series of current transformer shell with flame retardant, Taiwan Chi Mei ABS injection molding, the core is oriented with cold-rolled silicon steel coil with the second wire using high-strength electromagnetic enameled wire, the product structure is novel, handsome in appearance, easy to install , High accuracy, large capacity.

Used to collect low-voltage overload, short-circuit signal, and supporting the use of protective relays, a measurement range of 100-5000A, secondary output 5A, 1A, the main accuracy level: 5P10 and so on. Collecting low-voltage overload, short-circuit signal, and supporting the use of motor protection unit.

Standards compliant

Products meet GB GB20840.2-2014

Technical indicators

L protection CT primary current 100-5000A, secondary current 5A, 1A

2 rated working voltage AC0.66kV (equivalent AC0.69kV, GB / T156-2007)

3 rated frequency 50-60Hz

4 ambient temperature -30 ℃ ~ 70 ℃, the maximum temperature of 120 ℃

5 Altitude ≤ 3000m

6 power frequency withstand voltage 4000V / 1min 50Hz

7 for the direct invasion without rain and snow, no serious pollution and severe vibration of the place

Selection instructions

L According to a current and bus cross-section and other parameters to select the corresponding specifications products. One wire crosses the transformer window. Open the flip, through the pressure line for the second wiring, the second wiring leads to flip after the flip. Metering energy can be directly used to cover the closure of small holes sealed to prevent theft.

L working current long-term does not exceed 1.1 times the rated value, allowing 1.2 times the rated value of short-term use, the time does not exceed 1h;

L According to the measured current size, the selected rated current ratio, the general choice than the measured current about 2/3 of the rated current;

2, the polarity of the product is expressed as: one wiring sign P1, P2, corresponding secondary wiring sign S1, S2; S1 denotes the same name terminal of P1, S2 denotes the same name of P2;

3 measuring instrument connected to the S1, S2 side, then the total load connected to the loop should not exceed the rated load of the transformer, when the installation of the instrument position and the current transformer is far apart or loop load is large, should be preferred two Current of 1A specifications;

4 Note According to the busbar specifications and the number of roots, select the matching window size of the transformer.

Standard sizes

FL2-0.66IV medium voltage motor protection dedicated current transformer

FL2-0.66IV 3.3kV protection with current transformer shell ABS material, with a strong heat resistance and mechanical properties. The transformer can be overloaded 10 times, dedicated to coal mines, and coal mine dedicated motor protection device supporting the use.