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Yangzhou Ke Yu Electric Power Co., Ltd.

Address: No. 97, Zhongxin Road, Automobile Industrial Park, Yizheng City, Yangzhou City
Phone: 0514-87520111

E-mali:keyudl09@126.com
Website: www.keyudl.com

KW3M-12 type outdoor intelligent permanent magnet vacuum circuit breaker

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General introduction
KW3M-12 Outdoor High Voltage Intelligent Permanent Magnetic Vacuum Circuit Breaker is a self-developed vacuum circuit breaker with permanent magnet operating mechanism. Mainly by the vacuum circuit breaker body and computer protection controller composed of two parts, through the air outlet and outdoor sealed control cables for electrical connections. With measurement, fault detection, protection control and communication functions. Mainly used as substation 10kV outlet switch and 10kV line, can reliably determine and detect zero and external sector current and phase short circuit fault current, to achieve automatic removal of single-phase ground fault and short circuit fault.
The switch body is designed as a fast acting permanent magnet mechanism with few motion components, fast moving speed, reliable operation, good closing and closing characteristics, long service life and maintenance-free. The controller adopts the fast protection algorithm and cooperates with the circuit breaker body The whole set of fast break protection action time ≤ 25ms. This time is the time from the occurrence of the fault current to the time when the circuit breaker cuts off the fault current, which solves the problem that the 0 second quick-break protection of the outlet switch of the substation can not cooperate with the protection level difference of the branch line switch, effectively isolates the fault area, avoids the switch trip of the substation, Range, improve power supply reliability and continuity

Reference Standard

GB1984 AC high voltage circuit breaker
GB/T 11022 High-voltage switchgear and control equipment standard common technical requirements
GB/T 311.1   High-voltage power transmission equipment with insulation
GB/T 3309 High-voltage switchgear at room temperature mechanical test
DL/T 593 Common high-voltage switchgear ordering technical guidance
DL/T 402 AC high voltage vacuum circuit breaker ordering technical conditions
GB2706 Exchange high-voltage electrical dynamic and thermal stability test methods
GB/T 3309 High-voltage switchgear at room temperature mechanical test


◆Working temperature: -40~+70℃
◆Work environment humidity: 0~95%
◆Place of work elevation: ≤3000 m
◆Wind pressure: ≤ 700 Pa
◆Ice thickness:≤10mm
◆External insulation contamination level:  Ⅳ
◆seismic intensity: ≤ 8°
Note: This product is not suitable for fire, explosion hazard, chemical corrosion and severe vibration and other places

 

Model Description
Product model and meaning:

 

 

Features
◆Preclude the use of vacuum arc, reliable breaking, contact wear and tear, maintenance-free;
◆Epoxy resin composite as the outer insulation material, pressure and weather resistance, no oil, no SF6, environmental protection;
◆Permanent magnet operating mechanism, life expectancy up to 30,000 times, can quickly cut off the fault, to achieve rapid protection;
◆Can be configured with integrated isolation switch, with a clear visual disconnect, and with anti-error interlock;
◆Optional manual operating mechanism, in case of emergency can be manually closing operation.

 

 

Body dimensions

 

 

Ontology technical parameter
Circuit breaker switch technical parameters

number

Name

unit

Parameters

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-time 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 current (4s)

kA

20/25

9

Rated dynamic current stability

kA

50/63

10

Rated short-circuit current

kA

50/63

11

Mechanical life

Times

30000

12

Secondary circuit power frequency withstand voltage (1min)

KV

2

13

Rated operating sequence

 

O-0.3S-CO-180S-CO

14

net weight

KG

100

Mechanical characteristics parameters

number

Name

unit

Parameters

1

stroke

mm

11±1

2

Contact distance

mm

9±1

3

Overtravel

mm

3±1

4

Closing time

ms

≤60

5

Opening time

ms

≤25ms

6

Closing different points

ms

≤2

7

Closing 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 number

Times

30000

11

Main circuit resistance

μΩ

≤80

12

Main circuit resistance (with isolation switch)

μΩ

≤ 180

  

Features 
Telemetry function: can detect voltage, current and other AC analog and battery voltage, temperature and other DC analog.
Remote signal function: can detect the switch status signal, switch energy storage signal, battery low voltage alarm and other status information, and with dual-position remote signal processing capabilities, support for remote transmission of variable bit priority transmission.
Remote control function: RF remote control can be closed and closed. With local / remote selector switch, you can access the remote control station master remote opening and closing.
Fault detection: configure single-phase ground, three phase phase protection, overload, protection against inrush current protection, and record the size of the protection current.
Communication function: with serial port and network communication interface, built-in 101,104 and other power industry standard communication protocol, the data can be uploaded to the master through optical fiber / Ethernet, GPRS / CDMA and other means.
Self-diagnosis, self-recovery function: Self-diagnostic function, when found that internal hardware and software anomalies, timely recording and reporting, and the software has a power-on self-recovery function.
Power Management Features: Support dual AC power backup power supply, the battery as a backup power supply, seamless switching technology using soft switching, when the main power supply
Barrier, the standby power can be automatically seamlessly into; with battery activation management capabilities to automatically and manually realize the battery charge and discharge.

 

Control box technical parameters

Features

index

Function points the number and details

Current sampling

5A/1A

4 (3 phase current 1 channel zero sequence current)

Voltage sampling

AC220V/AC100V

4 (2 route voltage or 3 route phase voltage 1 route zero sequence voltage)

Remote input

Empty node

7 (sub-combined position, energy storage location, open 7)

AC input

AC165~265V

1 (Normal configuration 1 Road can be configured 2 automatic switching)

With the switch

Pop-up switch

Divide the brake energy storage DC24V 300W

With the switch

Permanent magnet switch

Coil DC220V40A

Communication protocol

IEC101 Balanced, unbalanced IEC104  DNP3.0  ModBus

Control box performance parameters

Features

unit

index

AC current loop overload capability

 

2In,continuously working;10In,10s;20In,1s

AC voltage circuit overload

 

1.5Un continuously working

Remote letter 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

 

AC power loss to maintain normal work more than 8 hours

Control output node capacity

 

DC24V/16A,AC250V/10A

Insulation performance

≥5MΩ

Electromagnetic Compatibility

 

IV

Degree of protection

IP

IP54

Ambient temperature

 

-40℃~+70℃,The maximum temperature change rate,1.0℃/min

environment humidity

 

Relative humidity 10~100 %,Maximum absolute humidity,35g/㎥

 

Control box dimensions

 

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