JLSZ2-10, The 6,3 series dry-type metering box (bucket type) (combination transformer) is suitable for measuring electrical energy on 50HZ three-phase AC power grids with rated voltages of 6KV, 10KV, and 35KV. It is installed on the high voltage side of the power supply transformer and contains three-phase active and reactive energy meters inside the instrument box. It is an electrical equipment used to directly measure active and reactive energy in high-voltage lines. It plays a major role in preventing electricity theft, saving energy, and strengthening power supply management. All technical indicators fully comply with the national standards GB17201-1997, GB1208-1997, GB1207-1997, and enterprise Q/YCD02-2000. It has obtained the manufacturing license (03820397) for measuring instruments from the National Technical Supervision Bureau. The product has been inspected and qualified by the National Transformer Supervision and Inspection Center, and has been approved by the National Economic and Trade Commission to be included in the third batch of recommended products for urban and rural power grid construction and renovation in China.

JLSZ2-10, 6,3 series dry metering box (barrel type) can replace oil immersed power metering box

2、 Product model and meaning



3、 Structural features

JLSZ2-10, The 6,3 series dry metering box (barrel type) consists of two parts: a combination transformer and an instrument box
The combination transformer consists of two single-phase voltage transformers (PT) connected together and two current transformers (CT). Both PT and CT are electromagnetic, and the two PT windings are connected by V/V to form a three-phase measuring device. The primary windings of the two CTs are connected in series with the power grid A and C, respectively. The side of the box is welded with grounding screws.
The instrument box is connected to the secondary winding output of the combination transformer, and there is one three-phase active meter and one reactive meter installed inside the instrument box. The numbers can be clearly read from inside the box.

4、 Main technical parameters
1. Rated voltage: 35KV10KV6KV
2. Accuracy level: 0.5 and 0.2 levels, 0.5S and 0.2S levels
3. Rated transformation ratio: Voltage ratio: 35000/100V, 10000/100V, 6000/100V
Current ratio: A current of 2.5, 5, 7.5, 10, 15, 20, 30, 40, 50, 75, 100, etc.
4. Dual current ratio specification: The secondary current of the dual ratio current has a specified current ratio of 1S1, 1S2, 1S3, 21S1, 21S2, 21S3, where S1 and S2 are small current ratios and S1 and S3 are large current ratios. The current ratio connection should be selected according to the maximum capacity of the corresponding transformer
5. Rated capacity:
6KV0.2, 0.2S voltage section: 2 × 20VA current section: 2 × 10VA 0.5 voltage section: 2 × 25VA current section: 2 × 10VA10KV0.2, 0.2S, 0.5 voltage section: 2 × 25VA current section: 2 × 10VA35KV0.2, 0.2S, 0.5 voltage section: 2 × 50VA current section: 2 × 10VA

6. Voltage Transformer Error Limit Table:

7. Error Limit Table for Current Transformers:

8. Error limits for special current transformers:

9. Temperature rise limit of transformer:


5、 Wiring schematic diagram



6、 Usage conditions
This product is intended for use within the ambient temperature range of -30 ° C to+40 ° C and at altitudes below 2500 meters. The air temperature should not exceed 85%. The installation site should have no severe vibration or turbulence, and there should be no highly corrosive gases. It is not suitable for installation in flammable and explosive places.

7、 Inspection and maintenance before use

1. Measure the insulation resistance of the winding and compare it with the factory value.
2. Check whether the wiring of the secondary circuit is correct, and whether the screws and pressure plate positions of the junction box are normal.
3. Check if the grounding of the casing is good and if the lightning protection measures have been compromised.
4. When connecting a line, it should be consistent with the phase sequence of the power grid, and the incoming and outgoing wiring of P1 and P2 must be correct.
5. Voltage transformers are not allowed to have short circuits in the secondary, and current transformers are not allowed to have open circuits in the secondary. Voltage transformers, current transformer secondary, and box casings must be reliably grounded to ensure the safety of instruments and personnel.

8、 Exterior installation dimensions



9、 Ordering Notice:
When placing an order, the user should provide the following information to the manufacturer:
1. Rated primary voltage ratio and current ratio;
2. Accuracy level;
3. Usage conditions;
4. Types, quantities, and accuracy levels of distribution meters.