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MFC911 series standard comprehensive protection measurement and control device

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MFC911 series basic comprehensive protection Australia I control device

Device model

Protective function

Measurement and control function

Use

MFC911C-I

Microcomputer current type protection device

1. Three-stage overcurrent protection

2.Overload protection

3.Non-power protection

4.Zero sequence overcurrent protection

Three-phase protection current, zero-sequence current, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm out put of running status,"Three Remote" Communication

 

For incoming or feeder

MFC911C-U

Microcomputer voltage type protection device

1. Zero sequence overvoltage protection

2. Undervoltage protection

3. Overvoltage protection

Zero-sequence voltage, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status, "Three remote" communication

Used in 10kV level voltage transformer cabinet

MFC911C-L Microcomputer Line Protection Device

1. Two-stage overcurrent protection
 
2. Current inverse time protection
 
3. Reclosing and post-acceleration
 
4. Low voltage load shedding
 
5. Zero sequence overcurrent protection
 
6. Zero sequence overvoltage protection

Three-phase protection current, zero-sequence current (calculation), A and C-phase measurement current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status

For general incoming or feeder

MFC911C-T

Microcomputer equipped with variable protection device

1. Two-stage overcurrent protection
 
2. Current inverse time protection
 
3. Overload protection
 
4. Non-power protection
 
5. Zero sequence overcurrent protection
 
6. Zero sequence overvoltage protection

Three-phase protection current, zero-sequence current (calculation), A and C-phase measurement current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status

Applicable to 10kV grade medium and small capacity distribution transformer

MFC911C-P

Microcomputer bus PT measurement and control device

1. Ground protection
 
2. PT switching protection

Three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative recording of events and protection events, alarm output for operating status

Used for PT switching and PT measurement and control

Optional description: C-Modbus-RS485 communication
 
F--Anti-jump and operation circuit (AC type device only includes operation circuit, not anti-jump)
 
E—External zero-sequence current (the protection device has no external measurement current)
Selection case: MFC911C-LCF, line protection device, with RS485 communication, including anti-hopping and operating circuit
 
MFC911C-LECF, line protection device, with RS485 communication, including anti-jump and operation circuit, with external zero-sequence current, cancel measurement current MFC911C-T, equipped with variable protection device, without RS485 communication, without anti-jump and operation circuit

Special note: Only one of the circuit breaker and the microcomputer protection device has the anti-jump function. If both are equipped with anti-jump function, it will affect the normal opening and closing of the circuit breaker. MFC911C-I and MFC911C-U are economical products, which can only be equipped with communication and no other optional functions.


MFC911 series standard comprehensive protection measurement and control device

 

Device model

Protective function

Measurement and control function

Use

MFC911-L Microcomputer Line Protection Device

1. Two-stage overcurrent protection
 
2. Current inverse time protection
 
3. Reclosing and post-acceleration
 
4. Low voltage load shedding
 
5. Zero sequence overcurrent protection
 
6. Zero sequence overvoltage protection

Three-phase protection current, zero-sequence current (calculation), A and C-phase measurement current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status

For general incoming or feeder

MFC911-T

Microcomputer equipped with variable protection device

1. Two-stage overcurrent protection
 
2. Current inverse time protection
 
3. Overload protection
 
4. Non-power protection
 
5. Zero sequence overcurrent protection
 
6. Zero sequence overvoltage protection

Three-phase protection current, zero-sequence current (calculation), A and C-phase measurement current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status

Applicable to 10kV grade medium and small capacity distribution transformer

MFC911-P

Microcomputer bus PT measurement and control device

1. Ground Protection
 
2. PT switching protection

Three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative recording of events and protection events, alarm output for operating status

Used for PT switching and PT measurement and control

MFC911-B

Microcomputer standby power automatic switching device

1. Incoming line / bus couplet backup
 
2. Single-phase two-stage overcurrent protection (incoming cabinet)

Single-phase protection current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events

Used for automatic backup of backup power

MFC911-M1

Microcomputer motor comprehensive protection device

1. Two-stage overcurrent protection
 
2. Low voltage load shedding
 
3. Overload protection
 
4. Negative sequence overcurrent protection
 
5. Overheat protection
 
5. Zero sequence overcurrent protection
 
6. Zero sequence overvoltage protection

Three-phase protection current, zero-sequence current (calculation), A and C-phase measurement current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status

Used in small and medium capacity motors

MFC911-M2

Microcomputer motor differential protection device

1. Differential Quick Break
 
2. Ratio difference
 
3. CT disconnection lock

Three-phase protection current, differential current on opposite side, 8-channel input detection, 2 alarm outputs, control circuit broken alarm

Used in conjunction with MFC911-M1 to complete medium and large capacity motor protection

MFC911-C

Microcomputer capacitor protection device

1. Two-stage overcurrent protection
 
2. Current inverse time protection
 
3. Low voltage load shedding protection
 
4. Automatic switching
 
5. Overvoltage protection
 
6. Zero sequence overcurrent protection
 
7. Zero sequence overvoltage protection

Three-phase protection current, zero-sequence current (calculation), A and C-phase measurement current, three-phase bus voltage, 8-channel input detection, 2-channel alarm output, cumulative record of events and protection events, alarm output of operating status

Used for parallel connection of small and medium capacitance capacitors

Optional description: C-Modbus-RS485 communication

F-anti-jumping and operating circuit (AC type device only contains operating circuit, not anti-jumping) E—External zero-sequence current (protection device has no external measuring current)

 

Selection case: MFC911-LCF, line protection device, with RS485 communication, including anti-hopping and operating circuit
 
MFC911-LECF, line protection device, with RS485 communication, including anti-jump and operation circuit, with external zero-sequence current, cancel the measurement current

Special note: Only one of the circuit breaker and the microcomputer protection device has the anti-jump function. If both are equipped with anti-jump function, it will affect the normal opening and closing of the circuit breaker.

 
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Address: Building 3, Xingsha International Enterprise Center, Changsha Economic and Technological Development Zone
Phone:0731-85524209
Email:cshk@cshkdq.com

Changsha Hengkai Electrical Equipment Co., Ltd.