| Description | 24 kV | ||||||||
| Nominal system voltage: kV | 24 | ||||||||
| Maximum system voltage: kV | 27 | ||||||||
| System Fault Rating: kA | 20 | ||||||||
| Insulation class: 1.2 / 50 μs; Lightning impulse withstand voltage: kV | 125 | ||||||||
| Insulation class: 1.2 / 50 μs; Lightning impulse withstand voltage: kV | 145 | ||||||||
| Power frequency (1-minute withstand, damp conditions): kV | 50 | ||||||||
| Steady-wave power supply frequency (1-minute withstand, damp conditions): kV | 50 | ||||||||
| Creepage distance | The maximum system voltage is 31 mm/kV | ||||||||
| Neutral grounding configuration | Effectively grounded | ||||||||
| Number of phases | Three-phase | |||||||||
| Nominal normal current | 1250A | |||||||||
| Mechanical endurance | M2 class | |||||||||
| Electrical endurance | E3 Level | |||||||||
| Rated short-circuit performance: kA | ||||||||||
| Rated short-circuit withstand current (peak value) | 50 | |||||||||
| Short-term withstand current (1 sec) | 40 | |||||||||
| Nominal short-circuit current (peak value) | 50 | |||||||||
| Insulation grade | ||||||||||
| Rated electrical impulse withstand voltage | 125kV pk | |||||||||
| Nominal short-time power-frequency withstand voltage test (wet condition, 1 minute) | 50kV | |||||||||
| Insulator creep distance | 31Mm/KV | |||||||||
| LBS design | |||||||||||
| Insulating medium | SF6 | ||||||||||
| Operating room | The LBS should be equipped with self- contained SF₆ compartments for each stage, including the operating mechanism. |
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| Suspend Secondary | SF6 | ||||||||||
| Operating mechanism | The three poles should be operated simultaneously via the spring mechanism. | ||||||||||
| Instruments/Sensors | |||||||||||
| Current Transformer/Sensor | Configure a CT for each stage to measure the stage current and activate the protection scheme. |
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| Voltage Transformer/Sensor | The VT/voltage sensor module for each phase is used to measure voltage; the enabled protection schemes include overvoltage and undervoltage settings. |
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| Accuracy | Current: ±0.5%; Voltage: ±0. 1% | ||||||||||
| Measuring the open/closed/locked and trip states | |||||||||||
| Tripping mechanism | Tripping shall be initiated in accordance with the protection scheme specified below. | ||||||||||
| Automatic Switching Solution | At least four O–Co–Co–CO switching cycles; according to IEC 62271, the dead time can be selected independently. | ||||||||||
| Manual Lock/Unlock | The manual locking/unlocking function is implemented via a liver mechanism controlled by a ground operating lever; this mechanism operates at the locked position. When setting up, all operations should be disabled and LBS should be enabled. From the ground, the locked and unlocked positions should be clearly visible. |
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| Protection Plan | |||||||||||
| Frequency Protection | The device shall provide over-frequency and under-frequency protection within a range of ±5 Hz above or below the system frequency, with a step size of 0.1 Hz. The device shall also incorporate an automatic closing function that enables re-engagement once the frequency returns to normal after a tripping event caused by over-frequency or under-frequency conditions. |
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| Voltage Protection | The device shall provide overvoltage/undervoltage trip setpoints in increments of 1% of the nominal system voltage, applicable for the ranges of 100%–150% (overvoltage) and 50%–100% (undervoltage). |
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| Overcurrent and ground fault operating characteristics | According to IEC 60255, these include instantaneous inversion, standard inversion, non-standard inversion, and extreme inversion. | ||||||||||
| Overcurrent setpoint range | 25%–150% of the rated current The minimum resolution is 1 A. |
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| Ground fault detection scope | Ranging from 5% to 50% of the rated current, with a minimum resolution of 1 A. | ||||||||||
| Sensitivity setting range for ground faults | The current transformer's rated current range is 0.5% to 8% of the rated current, with a minimum resolution of 0.5 A. | ||||||||||
| Protection Configuration | Facilities for integrating protection configuration profiles shall be provided. | ||||||||||
| Cold Load Collection (CL-PU) | The Cold Load Collection (CLPU) facility is designed to prevent control system tripping caused by short-term current surges resulting from the loss of normal load diversity. This includes the cold loading duration and user-defined parameters. |
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| Surge suppression protection | A device that utilizes the overcurrent protection time setting and surge suppression factor configured by the user. | ||||||||||
| High-current lockout | When the continuous current condition exceeds the user-defined high current lockout threshold, the LBS can directly perform an LBS lockout. Under these conditions, the LBS shall not re-close, and it shall provide an indication and signal. |
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| Dead zone setting range | 0.5 to 120 seconds. | ||||||||||
| Reset time setting range | 5 seconds to 180 seconds | ||||||||||
| term of service | |||||||||||
| 1 | Altitude (above sea level) | 1800m | |||||||||
| 2 | Maximum outdoor temperature | 50℃ | |||||||||
| 3 | Minimum outdoor temperature | -20 ° ℃ | |||||||||
| 4 | Maximum monthly primary operating temperature | 35 °C | |||||||||
| 5 | Annual average temperature | 25 ° ℃ | |||||||||
| 6 | Maximum relative humidity | Up to 96% | |||||||||
| 7 | Isolarnic level | 180 thunderstorm days per year | |||||||||
| 8 | Maximum lightning strike frequency | Twice per kilometer each year. Total: 32 times | |||||||||
| 9 | Maximum wind velocity | 100 km/h | |||||||||
| 10 | Maximum solar radiation Insulation layer on the floor plan |
1035W/m2 | |||||||||
| 11 | Maximum soil temperature (at 1-meter depth) | 30℃ | |||||||||
| 12 | Soil maximum temperature resistance | 2℃ m/W | |||||||||
| 13 | Maximum soil electrical resistance | 2000 Qm | |||||||||
| 14 | Seismic zones (Modified Mecalli scale) | Zone 8 | |||||||||
| 15 | Seismic coefficient | 0.15 | |||||||||
| 16 | Atmospheric Type | Maritime | |||||||||
| 17 | Air pollutant | Sand, dust, salt | |||||||||
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18 |
Pollute | According to IEC 60815, the design pollut- ion class shall be "Heavy" (Pollution Class II). |
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| Technical Timeline | |||||||||||
| Technical Data Progress Schedule for the Load Disconnection Switch Main Unit (Circuit Breaker) | |||||||||||
| S/N | Function | Description | Bidders' Documentation | ||||||||
| 1 | Type | Column-type outdoor SF₆ circuit breaker |
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| 2 | International standard | IEC 62271-103 KEMA | |||||||||
| 3 | Country of origin | Specification | |||||||||
| 4 | Manufacturer | Specification | |||||||||
| 5 | Fabrication | Specification | |||||||||
| 6 | Rated frequency (Hz) | 50 | |||||||||
| 7 | Rated current (A) | 630 | |||||||||
| 8 | Rated voltage (kV) | 24 | |||||||||
| 9 | Rated voltage (KV) | 27 | |||||||||
| 10 | System fault level (kA) | 20 | |||||||||
| 11 | Continuing current rating (A) | 630 | |||||||||
| 12 | Short-circuit breaking capacity (kA) | 20 | |||||||||
| 13 | Peak short-circuit fault current (kA) | 50 | |||||||||
| 14 | Short-circuit rated duration (seconds) | 4 | |||||||||
| 15 | Symmetric (rms)(kA) | 20 | |||||||||
| 16 | Asymmetric (RMS) (kA) | 20 | |||||||||
| 17 | Close/Open Time (seconds) | <0.7 | |||||||||
| 18 | Mechanical Operation (Verification) (No.) | 10000 | |||||||||
| 19 | Electrical Durability (Guaranteed) | 10000 | |||||||||
| 20 | Tank Materials | Stainless steel | |||||||||
| 21 | Thickness (mm) | ≥3 | |||||||||
| 22 | Pigment | Gray RAL 7035 | |||||||||
| 23 | Tank welding types | TIG weld | |||||||||
| 24 | Tank bursting pressure (kgf/cm²) | 4–6 | |||||||||
| 25 | Enclosure IP Rating (Minimum) | IP67 | |||||||||
| 26 | Reference Manufacturing Standards | IEC 62271-103 | |||||||||
| 27 | Material/Color | Specification | |||||||||
| 28 | Maximum system voltage creepage distance (mm) | ≥31 kV | |||||||||
| 29 | Power-frequency withstand voltage (1 minute) (kV) | 50 | |||||||||
| 30 | Lightning impulse withstand voltage (kV) | 125 | |||||||||
| 31 | Terminal Type | NEMA | |||||||||
| 32 | Insulation and circuit breaker compartment | SF6 | |||||||||
| 33 | SF₆ Valve Room | Lifelong sealing | |||||||||
| 34 | Arc-extinguishing medium | SF6 | |||||||||
| 35 | Insulating medium | SF6 | |||||||||
| 36 | According to IEC Standard 62271: Sealed Pressure Systems | Mandatory | |||||||||
| 37 | Using the mechanical operating device, the lever can be easily operated from the ground. | Yes | |||||||||
| 38 | Manual control comprises a tubular linkage rod made of hot-dip galvanized steel; this tubular linkage rod is connected to an independent controller and is equipped with a handle for manual operation from the bottom ofthe rod. (Yes/No) |
Yes | |||||||||
| 39 | This connection includes a pipe that can be easily adjusted to any rod height. | Yes | |||||||||
| 40 | All steel components of the operating mechanism shall be hot-dip galvanized. | Yes | |||||||||
| 41 | Set the "Open" position and lock the switch in the open position. (Yes/No) | Yes | |||||||||
| 42 | The "Off" position: The switch is locked in the off position. (Yes/No) | Yes | |||||||||
| 43 | Manual operating force (Newtons) | <200 | |||||||||
| 44 | Is the lever separated from the lever arm and operating handle (Yes/No)? | Yes | |||||||||
| 45 | Whether the LBS manufacturer manufactures the mechanism (Yes/No) | Yes | |||||||||
| 46 | Phase difference (mm) | 380 | |||||||||
| 47 | Ground displacement (mm) | 330 | |||||||||
| 48 | Arrester rated voltage (KV) | 36 | |||||||||
| 49 | Radio frequency interference voltage (uV) | Specification | |||||||||
| Note: Please fill out a timetable for each type of circuit breaker. | |||||||||||
| 2.1 Input and output phase current input | |||||||||||
| Quantity: 3 Rated Current:5A,Measurement Range:20× In; Instrumentation Accuracy: ≥0.1 × In ±1%In;Frequency of Measurement: 50 times per hour Heat-resistant: Continuous 2*In 10 The second 10*In 1 Second 40*In Load @In ≤ 0.2 VA (5A phase element) |
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| Sensitive current input | |||||||||||
| Quantity 1 Rated current: 5A Measurement range: 2 × rated current; Inst- rumentation accuracy: ≥ 0.1 × rated current; ± 1% of rated current; Frequency: 50/60 Hz Heat resistance: Continuous 2*In 10 Second 10*In 1 Second 40*In Load @In ≤ 0.02 VA (1-ampere grounded component) |
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| Voltage input | |||||||||||
| Quantity:1 PT voltage Nominal value: 40.120 Vrms Operating ran.g.e.: 0–200 Vrms; Inst- rumentation accuracy: ≥0.8×Vn ±1% Vn;Load@110 V, 0.06 VA Withstand voltage: 240 Vrms |
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| Auxiliary supply | |||||||||||
| DC voltage: 220V Voltage range: 165–365 V AC voltage: 220 VAC, 50 Hz Operating range: 165–265 Vrms, AC 50/ 60 Hz, ±5%;Power consumption ≤ 10 W |
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| Binary input | |||||||||||
| No.7 Operating voltage: 24 V DC; maximum operating DC current: 2 mA |
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| Binary output | |||||||||||
| Number 2 Operating voltage: 220V DC |
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| Operating mode: Users can select between self-reset or manual reset/electrical reset, or pulse-based operation; the operating time is timed from the moment power is applied (<20 ms input). | |||||||||||
| 2.2 Unit Design | |||||||||||
| Indicator light 16,4-line character display 10, LED user interface 11, navigation keys Weight: 18 kg |
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| 2.3 serial interface | |||||||||||
| Communication ports: RS485, RS232, RJ45, USB, HDMI Protocols: IEC 60870-5- 101; IEC 60870-5- 104; DNP3.0, MODBUS RTU, FTU |
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| 2.4 data storage | |||||||||||
| Event count: 150, 100 | |||||||||||
| 2.5 mechanical test Vibration (sine wave) - IEC 60255-21- 1 Class I |
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| Type: Vibration | Compression strength | 0-grade, 1.5g, 1.0g | Change ≤ 5% ≤5% |
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| Impact and Collision – IEC 60255-21-2 Class 1 | |||||||||||
| Type | Rank | Difference | |||||||||
| Impulse response | 0.5gn,11ms | ≤5% | |||||||||
| Resistance to impact | 15gn,11ms | ≤5% | |||||||||
| Bump test | 10gn,16ms | ≤5% | |||||||||
| Impact and Collision – IEC 60255-21-3 Class I | |||||||||||
| X-Plane-3 model, rated voltage level. The displacement below the crossover frequency (8–9 Hz) is 1 g <sub>n</sub>.Seismic response and ≤5%Y-plane displacement: 1.5 mm,below the crossover frequency (8-9 Hz)≥ .5 g<sub>n</sub> |
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| Mechanical Classification | |||||||||||
| Durability> 10⁶ cycles | |||||||||||
| 2.6 Electrical Testing Insulation – IEC 60255-5 |
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| Type Level Between any terminal and ground, a 2.0 kV AC RMS voltage shall be applied for 1 minute between the normally open contacts; additionally, an AC voltage of 2.0 kV RMS shall be applied for 1 minute. |
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| High-frequency interference - IEC 60255-22- 1 Class III | |||||||||||
| Type Standard (Vertical) Mode Series (Horizontal) Mode |
Rank 2.5 kV 1.0 kV |
Change ≤5% ≤5% |
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| High-frequency interference - IEC 60255-22-2 Class IV | |||||||||||
| Type | Rank | Diffe- rence |
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| Contact discharge | 8.0 kV | ≤5% | |||||||||
| Fast Transient-IEC 60255-22-4 Class A (2002) | |||||||||||
| Type | Rank | Diffe- rence |
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| 5/50 ns, 2.5 kHz repetition rate | 4 kV | ≤5% | |||||||||
| Anti-interference – IEC 60255-22-5 | |||||||||||
| Type | Rank | Difference | |||||||||
| Analog input: Earth ground connection |
4.0 kV | ≤10% | |||||||||
| Case Study: Aux Power & I/O: Line to Earth | 2.0 kV | ≤10% | |||||||||
| RS485 communication port: Line-to-ground | 1.0 kV | No data loss | |||||||||
| Analog Inp- ut: Line-by- Line |
1.0 kV | ≤10% | |||||||||
| Case Study: Aux Power & I/O: Line-to-Line | 1.0 kV* | ≤10% | |||||||||
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