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MFC911 series standard comprehensive protection measurement and control device
MFC911 series basic comprehensive protection Australia I control device
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Device model |
Protective function |
Measurement and control function |
Use |
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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
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For incoming or feeder |
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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 |
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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
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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 |
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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
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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 |
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MFC911C-P Microcomputer bus PT measurement and control device |
1. Ground protection
2. PT switching protection
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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 |
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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)
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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
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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. |
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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
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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 |
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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
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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 |
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MFC911-P Microcomputer bus PT measurement and control device |
1. Ground Protection
2. PT switching protection
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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 |
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MFC911-B Microcomputer standby power automatic switching device |
1. Incoming line / bus couplet backup
2. Single-phase two-stage overcurrent protection (incoming cabinet)
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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 |
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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
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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 |
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MFC911-M2 Microcomputer motor differential protection device |
1. Differential Quick Break
2. Ratio difference
3. CT disconnection lock
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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 |
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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
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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 |
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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)
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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
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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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Contact us
Address: Building 3, Xingsha International Enterprise Center, Changsha Economic and Technological Development Zone
Phone：0731-85524209
Email：cshk@cshkdq.com
