
The complete pole switch with the integration of primary and secondary equipment (ordinary pole type) complies with the requirements of the standardized design scheme set forth in Document No. 151 of the Equipment Department of the State Grid Corporation of China.
The complete pole switch with the integration of primary and secondary equipment (ordinary pole type) complies with the requirements of the standardized design scheme set forth in Document No. 151 of the Equipment Department of the State Grid Corporation of China. It consists of the following main parts: vacuum circuit breaker (conventional support type), feeder terminal, supply voltage transformer and connecting cables with aircraft connectors. The switch uses vacuum arc extinguishing. The transformer combination circuit has three options: electromagnetic option - external protection current and zero-sequence transformers of a single design and a zero-sequence voltage transformer; electronic version - external electronic current and voltage transformers. The feeder terminal is made in a casing and, depending on the transformer combination circuit, is accordingly divided into electromagnetic feeder terminal, electronic feeder terminal and digital feeder terminal. The overall design of the product complies with the standardized design requirements of the State Grid Corporation of China. The installed current and voltage transformers are characterized by a wide measurement range, high measurement accuracy and high reliability, which allows the complete device with the integration of primary and secondary equipment to accurately detect various types of faults on the line. Designed for use on feeders, intersection points, sectioning points, branches or consumer demarcation points of 10 kV overhead distribution lines and performs the functions of disconnecting, controlling, protecting and collecting data on line losses.
| No. | Parameter | Unit change | Value |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated current | A | 630 |
| 3 | Rated frequency | Hz | 50 |
| 4 | Rated lightning impulse voltage (1.2/50 µs) | kV | Phase/ground 75, open gap 85 |
| 5 | Rated short-term power frequency test voltage (1 min) | kV | Phase/ground 42, open gap 48 |
| 6 | Rated short circuit breaking current | kA | 20 |
| 7 | Number of short circuit breaking operations | cycles | 30 |
| 8 | Rated short-time current | kA | 20 (4s) |
| 9 | Rated peak current withstand current | kA | 50 |
| 10 | Power frequency test voltage of secondary circuits (1 min) | kV | 2 |
| 11 | Partial discharges (1.1 Ur) | pCL | ≤20 |
| 12 | Installation interface (fitting dimensions) | mm | 920×160 |
| 13 | Phase distance | mm | 340 |
| 14 | Weight | kg | ≤130 |
| 15 | Circuit breaker protection degree | — | IP67 |
| 16 | Mechanical wear resistance | cycles | 20000 |
| 17 | Nominal sequence of operations | — | O-0.3s-CO-180s-CO |
| 18 | Transformer installation method | — | Post external (electromagnetic/electronic) |
| 19 | Feeder Automation Terminal (FTU) Design | — | Standard cover type, box type |
| No. | Type | Parameter | Device name | Meaning |
| 1 | Electromagnetic | Nominal transformation ratio | Phase current transformer | 600 A / 5 A or 600 A / 1 A |
| Zero sequence current transformer | 100 A / 1 A (current expansion factor ≥ 6) | |||
| Zero sequence voltage sensor | (10 kV) / (6.5 V / 3) | |||
| Supply voltage transformer | 10 / 0.1 / 0.22 kV | |||
| Accuracy class | Phase current transformer | Protection: class 5P10, measurement: class 0.5S | ||
| Zero sequence current transformer | With a primary current from 1 A to the rated value, it corresponds to class 1S (angular and current errors); protection accuracy class 5P10 | |||
| Zero sequence voltage sensor | 3P | |||
| Supply voltage transformer | Class 0.5/3 | |||
| 2 | Electronic | Nominal transformation ratio | Phase current sensor | 600 A / 1 V |
| Zero sequence current sensor | 20 A / 0.2 V | |||
| Phase voltage sensor | (10 kV) / (3.25 V) | |||
| Zero sequence voltage sensor | (10 kV) / (6.5 V / 3) | |||
| Supply voltage transformer | 10 kV / 0.22 kV | |||
| Accuracy class | Phase current sensor | Dimension: 0.5S class, protection: 5P10 | ||
| Zero sequence current sensor | With a primary current from 1 A to the rated value, it corresponds to class 1S (angular and current errors); protection: 10P30 | |||
| Phase voltage sensor | Class 0.5 | |||
| Zero sequence voltage sensor | 3P | |||
| Supply voltage transformer | Class 3 |