KW3M-12 outdoor intelligent permanent magnet vacuum circuit breaker

KW3M-12 outdoor high-voltage intelligent permanent magnet vacuum circuit breaker is a vacuum circuit breaker with permanent magnet operating mechanism independently developed by our company. It is mainly composed of vacuum circuit breaker body and microcomputer protection controller, and is electrically connected through aviation socket and outdoor sealed control cable. With measurement, fault detection, protection control and communication functions. Mainly used as 10kV outgoing switch in substations and 10kV lines, it can reliably judge and detect zero-sequence current and interphase short-circuit fault current inside and outside the boundary, and realize automatic removal of single-phase grounding fault and short-circuit fault.

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breaker

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KW3M-12 outdoor intelligent permanent magnet vacuum circuit breaker

Overview
KW3M-12 outdoor high-voltage intelligent permanent magnet vacuum circuit breaker is a vacuum circuit breaker with permanent magnet operating mechanism independently developed by our company. It is mainly composed of vacuum circuit breaker body and microcomputer protection controller, and is electrically connected through aviation socket and outdoor sealed control cable. With measurement, fault detection, protection control and communication functions. Mainly used as 10kV outgoing switch in substations and 10kV lines, it can reliably judge and detect zero-sequence current and interphase short-circuit fault current inside and outside the boundary, and realize automatic removal of single-phase grounding fault and short-circuit fault.
The switch body is designed as a fast-acting permanent magnet mechanism, with few moving execution parts, fast action speed, reliable action, good opening and closing characteristics, long service life, and maintenance-free. The controller adopts a fast protection algorithm, which is realized in cooperation with the circuit breaker body The action time of the whole group of quick-break protection is less than 25ms. This time is the time from when the fault current occurs to when the circuit breaker removes the fault current, which solves the problem that the substation outlet switch 0-second quick-break protection and the branch switch protection level difference are difficult to cooperate, and can effectively isolate the fault area, avoid the trip of the substation switch, and reduce power outages range, improve power supply reliability and continuity.

Citations

GB1984	AC High Voltage Circuit Breaker
GB/T 11022	Common technical requirements for high voltage switchgear and controlgear standards
GB/T 311.1	Insulation coordination of high voltage power transmission and transformation equipment
GB/T 3309	Mechanical test of high voltage switchgear at room temperature
DL/T 593	Technical Guidelines for Common Ordering of High Voltage Switchgear
DL/T 402	Technical conditions for ordering AC high voltage vacuum circuit breakers
GB2706	Test methods for electrical and thermal stability of AC high voltage electrical appliances
GB/T 3309	Mechanical test of high voltage switchgear at room temperature

◆Working environment temperature: -40～+70℃
◆Working environment humidity: 0～95%
◆Working site altitude: ≤3000 m
◆Wind pressure: ≤ 700 Pa
◆Icing thickness: ≤10mm
◆Outer insulation pollution level: Ⅳ
◆Earthquake intensity: ≤ 8 degrees
Note: This product is not suitable for fire, explosion hazard, chemical corrosion and severe vibration and other places.

Model description
Product model and meaning:

111

Features
◆Using vacuum arc extinguishing, reliable breaking, small contact wear, maintenance-free;
◆Adopt epoxy resin composite as outer insulating material, good pressure and weather resistance, no oil, no SF6, environmental protection;
◆Using permanent magnet operating mechanism, the service life can reach 30,000 times, which can quickly cut off the fault and realize fast protection;
◆It can be equipped with an integrated isolation knife switch, with an obvious visual disconnection point and an anti-mistake interlocking device;
◆It can be equipped with a manual operating mechanism, which can perform manual closing operation in emergency situations.

Body Dimensions

111

Ontology technical parameters
Technical parameters of circuit breaker switch

Serial number	Name Name	Units	Parameter Number
1	Rated voltage	kV	12
2	Rated current	A	630/1250
3	Rated frequency	Hz	50
4	Rated lightning impulse withstand voltage	kV	Ground 75/Fracture 85
5	Rated short-term power frequency withstand voltage (1min)	kV	Wet test 34, dry test 42/fracture 48
6	Rated short-circuit breaking current	kA	20/25
7	Rated short-circuit breaking times	times	30
8	Rated thermal stability current (4s)	kA	20/25
9	Rated dynamic stable current	kA	50/63
10	Rated short-circuit making current	kA	50/63
11	Mechanical life	times	30000
12	Secondary circuit power frequency withstand voltage (1min)	KV	2
13	Nominal operating sequence		O-0.3S-CO-180S-CO
14	Net weight	KG	100

Mechanical parameters

serial number	Name Name	Units	Ref Number
1	Itinerary	mm	11±1
2	Contact Spacing	mm	9±1
3	Overtravel	mm	3±1
4	Close time	ms	≤60
5	Opening time	ms	≤25ms
6	Open and close different periods	ms	≤2
7	Close bounce	mm	≤2
8	Average opening speed	m/s	1.0±0.2
9	Average closing speed	m/s	0.6±0.2
10	Mechanical times	times	30000
11	Main circuit resistance	μΩ	≤80
12	Main circuit resistance (with isolation switch)	μΩ	≤ 180

Feature introduction
Telemetry function: It can detect AC analog quantities such as voltage and current, and DC analog quantities such as battery voltage and temperature.
Remote signaling function: It can detect status information such as switch status signal, switch energy storage signal, battery low voltage alarm, etc., and has dual-position remote signaling processing function to support remote signaling displacement priority transmission.
Remote control function: radio frequency wireless remote control opening and closing. Equipped with a local/remote selection switch, which can be connected to the master station to remotely control the opening and closing.
Fault detection function: configure single-phase grounding, three-stage phase-to-phase protection, overload, anti-inrush current protection and other protection functions, and record the protection current.
Communication function: with serial port and network communication interface, built-in 101, 104 and other power industry standard communication protocols, can upload data to the master station through optical fiber/Ethernet, GPRS/CDMA, etc.
Self-diagnosis and self-recovery function: with self-diagnosis function, when internal software and hardware abnormalities are found, they can be recorded and reported in time, and the software has the function of self-recovery after power-on.
Power management function: support dual-channel AC power backup power supply, use battery as backup power supply, and use soft switching technology to seamlessly switch in, when the main power supply fails
In case of failure, the backup power supply can be automatically and seamlessly put in; it has the function of battery activation management, and can automatically and manually charge and discharge the battery.

Technical parameters of control box

Features	Metrics	Number and details of function points
Current sampling	5A/1A	4 (3-way phase current 1-way zero sequence current)
Voltage sampling	AC220V/AC100V	4 (2 line voltage or 3 line phase voltage 1 line zero sequence voltage)
remote input	empty node	7 (7-way opening, such as opening and closing position, energy storage position, etc.)
Communication input	AC165～265V	1 (normal configuration 1-way can be configured with 2-way automatic switching if required)
align switch	Flick switch	Opening and closing energy storage DC24V 300W
align switch	Permanent magnet switch	Coil DC220V40A
Communication protocol	IEC101 Balanced, Unbalanced IEC104 DNP3.0 ModBus

Control box performance parameters

Function	Units	Metrics
AC current loop overload capacity		2In, continuous work; 10In, 10s; 20In, 1s
AC voltage loop overload capacity		1.5Un continuous work
Remote Signaling Resolution	ms	≤2ms
Software anti-shake time	ms	0～6000ms can be set
Device Power Consumption	w	≤15w
Measurement accuracy	%	Voltage, current 0.5 %, active power, reactive power 1.0 %
Backup power		Maintain normal operation for more than 8 hours after AC power failure
Controlling output node capacity		DC24V/16A, AC250V/10A
Insulation Properties	MΩ	≥5MΩ
EMC		IV
Protection level	IP	IP54
Ambient temperature		-40℃～+70℃, the maximum temperature change rate, 1.0℃/min
Ambient humidity		Relative humidity 10～100 %, maximum absolute humidity, 35g/㎥

Control Box Dimensions

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