LW16-40.5 Outdoor SF6 Circuit Breaker High Voltage Reliable Durable Power Transmission Equipment for Substation Electrical Protection

The LW16-40.5 Outdoor SF6 Circuit Breaker provides reliable and durable high-voltage protection for substations and power transmission systems. Designed for extreme outdoor conditions, it ensures efficient interruption of fault currents, excellent arc-quenching performance, and long service life, delivering safe and stable electrical protection for critical energy infrastructure.

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Giới thiệu chi tiết

The LW16-40.5 outdoor SF6 circuit breaker is designed for use in a 50 Hz three-phase AC power system and is suitable for control and protection in industrial enterprises, power plants, and substations. This product is capable of frequent operations and can be used as a link circuit breaker and for switching capacitor banks or reactor banks. The internal current transformers can be used for measurement and protection. It can directly replace the SW2-35 oil circuit breaker and, with the addition of an overcurrent bracket, can replace various models of oil circuit breakers. It is an ideal oil-free circuit breaker for 35 kV power systems.

Note: When the circuit breaker is in hot standby mode, surge arresters must be installed on the fault side of the breaker.

Main Technical Parameters of Circuit Breaker

No.	Parameter Name	Unit	Parameter Value
1	Rated voltage	kV	40.5
2	1-Minute power frequency withstand voltage	kV	95 (Grounded) / 185 (Contact gap)
3	Rated frequency	Hz	50
4	Rated current	A	1600, 2000
5	Rated short-circuit breaking current	kA	25 (reclosing), 31.5 (single separation)
6	Rated short-circuit making current (peak)	kA	63
7	Rated short-time withstand current	kA	25
8	Rated short circuit duration	s	4
9	Rated peak withstand current	kA	63
10	Rated operating sequence	–	O—0.3s—CO—180s—CO
11	Rated switching current for a single capacitor bank	A	400
12	Rated out-of-step breaking current	kA	6.3
13	Rated out-of-phase breaking current	kA	21.75
14	Mechanical life test	Times	3000
15	Rated cumulative breaking times (rated current)	Times	2000
16	Rated cumulative breaking times (25kA short-circuit)	Times	21
17	Tripping time	s	≤0.06 (rated/max voltage) / ≤0.10 (min voltage)
18	Closing time	s	≤0.15
19	SF6 gas rated pressure (20℃ gauge pressure)	MPa	0.60±0.015
20	SF6 gas refill alarm pressure (20℃ gauge pressure)	MPa	0.55±0.015
21	SF6 gas minimum functional pressure (20℃ gauge)	MPa	0.52±0.015
22	SF6 gas annual leakage rate	%/Year	≤1
23	SF6 gas trace moisture content	ppm (V/V)	≤150×10⁻⁶
24	CT14-A mechanism coil rated voltage	V	DC: 110/220; AC: 220/380
25	SF6 gas weight	kg	Normal: 2.5; CT: 6; Elevated CT: 8
26	Circuit breaker weight	kg	1000
27	External insulation leakage specific distance	mm/kV	≥31
28	Porcelain insulator leakage distance	mm	≥1255

Notes:

O: Open operation

CO: Close-Open operation

s: Seconds

ppm: Parts per million

CT: Current Transformer configuration

Formatting Consistency:

Values with tolerances (e.g., ±0.015) and conditional parameters (e.g., reclosing/single separation) are explicitly stated.
Units standardized (e.g., “kV” for kilovolts, “MPa” for megapascals).
Scientific notation corrected (e.g., “≤150×10⁻⁶” instead of “X10-6”).
Combined entries (e.g., tripping time under different voltages) are merged for clarity.