PRODUCT SHOW
SAI-708 LF voltage splitting device
I. Overview
SAI-708 Digital Low- week low- splitting device is suitable for the substation and zero-sequence voltage splitting the case of small supply overvoltage splitting function Low power plants , low-cycle splitting function.
Protection configuration
● may be low or low- week lockout of the rate of change of frequency load shedding protection
● The rate of change of the voltage through the voltage splitting lockout protection
● dispersed Disturbance
● PT break blocking
● Protect export control word using the trip mode choice , flexible tuning
Control Function Deployment
● 11 road open into the strong electric remote signal acquisition
● device power failure alarm , emergency signal device , the device alarm signal
● analog telemetry : Ua, Ub, Uc, U0, Uab, Ubc, Uca, F
● 2 -way pulse input
● 1 -way GPS time
Second, the principle that the protection of
2.1, the zero-sequence overvoltage
Real-time computing device and zero-sequence overvoltage discrimination Sec .
Sec device when performing zero-sequence overvoltage discrimination , discrimination logically consistent paragraphs , which action the following conditions:
1) 3U0> U0n; I0n: zero sequence overvoltage N segment setpoint
2) T> T0n; T0n: zero sequence overvoltage N segment delay value
Which is zero -sequence voltage 3U0 , Uod1 zero sequence overvoltage splitting segment Ⅰ value , Uod2 zero sequence over Ⅱ segment setpoint pressure splitting
2.2 , low cycle splitting
The frequency can achieve decentralized control , when the system frequency is below tuning frequency, this component will automatically determine whether removal of the load .
Frequency load shedding is provided a functional logic slip blocking element to distinguish the fault condition , the motor reverse charging and truly meritorious shortfall. Consider frequency load shedding feature role in the steady state only , so take the AB phase voltage calculation , still add three phase voltage during the test. When this voltage (UAB) is lower than the frequency of calculation of voltage lockout , low cycle load shedding device will automatically exit .
2.3 , voltage splitting
With this device , you can achieve low-voltage control when the system voltage is below the set voltage , the device will automatically determine whether the removal of the load .
Voltage splitting logic elements are:
2.4, PT break detection
One of the following three conditions are met, the device reported hair "PT disconnected " message and warning lights lit :
One of the following three conditions are met, the device reported hair "PT disconnected " message and warning lights lit :
One of the following three conditions are met, the device reported hair "PT disconnected " message and warning lights lit :
a) Three-phase voltages are less than 8V, sentenced to three-phase pressure loss .
b) three-phase voltage greater than 8V, the minimum line voltage is less than 16V, sentenced to two-phase or single-phase PT disconnected.
c) three-phase voltage greater than 8V, the maximum and minimum line voltage line voltage difference is greater than 16V, sentenced to two-phase or single-phase PT disconnected.
PT disconnection detection function can be cast back through the control word.
2.5 , data record
The device has a fault recorder function. Analog recording is available Ua, Ub, Uc. All data records stored in FLASH RAM in the information data , the PC can be read. Recorded wave reports record is eight more than the total time for each recorded data capacity of 1S, separated into two records, motion capture and adjust the recording time. Events can be recorded no less than 1000 times. In addition to the device data recording system disturbances , but also recording device operation event status bit input quantitative event , change event and setting alarm events and other devices .
2.6 , remote telemetry, remote control
The main function remote control : All exports can be remotely controlled.
Remote measurements are mainly : UA, UB, UC, UAB, UBC, UCA, F. All these quantities are calculated in real time and calculate the local network does not depend on an accuracy of 0.5 .
Remote Communication are: 16 remote communication open into , remote communication device displacement and accident remote, and for recording the sequence of events , remote resolution of less than 2ms.
Third, tuning and event information devices
3.1 List and description of the setting value
No. Name value range Unit Remarks
A control word of a 0000 ~ FFFF no see control word description
2 control word二0000 ~ FFFF no spare
3 zero-sequence overvoltage splitting segment Ⅰ 1 ~ 120.0 V
4 zero sequence overvoltage segment Ⅰ time 0 ~ 50.00 S
5 zero-sequence overvoltage splitting Ⅱ paragraph 1 ~ 120.0 V
6 zero-sequence overvoltage period of time Ⅱ 0 ~ 50.00 S
7 voltage splitting segment Ⅰ 1 ~ 120.0 V
8 Section Ⅰ voltage splitting time 0 ~ 50.00 S
9 voltage splitting Ⅱ paragraph 1 ~ 120.0 V
10 voltage splitting a time Ⅱ 0 ~ 50.00 S
11 voltage splitting latching current 0.2 ~ 100.00 A
12 voltage splitting blocking voltage 10 ~ 120.00 V
13 blocking voltage change rate 1 ~ 60.00 V / S
14 week low splitting segment Ⅰ 45 ~ 49.5 HZ
15 Section Ⅰ low cycle splitting time 0 ~ 50.00 S
16 week low splitting Ⅱ paragraph 45 ~ 49.5 HZ
17 week low splitting Ⅱ period of time 0 ~ 50.00 S
18 week low shedding blocking voltage 10 ~ 120.0 V
19 week low shedding atresia slip 0.5 ~ 20.00 HZ / S
Control word 1 Definition:
Meaning Bit 0 is set to 1 when the meaning set
15 PT PT break into disconnected exit
14 CT rated current of 1A CT rated current of 5A
13 low- splitting through current blocking voltage splitting without current blocking
0-12 spare spare
3.2 Protection plate Description
Corresponding function name plate
Zero sequence overvoltage splitting segment Ⅰ zero sequence overvoltage splitting function segment Ⅰ cast back
Zero sequence overvoltage splitting Ⅱ segment splitting zero sequence overvoltage feature cast back section Ⅱ
Low voltage splitting splitting segment segment Ⅰ Ⅰ feature cast back
Low voltage splitting splitting section Ⅱ Ⅱ segment features cast back
Low cycle splitting segment Ⅰ Ⅰ low cycle splitting segments feature cast back
Splitting low cycle section Ⅱ Ⅱ low cycle splitting segment features cast back
Spare a standby function cast back
Spare 2 Spare feature cast back
Spare 3 alternate function cast back
Alternate alternate function 4 cast back
SAI-708 Digital Low- week low- splitting device is suitable for the substation and zero-sequence voltage splitting the case of small supply overvoltage splitting function Low power plants , low-cycle splitting function.
Protection configuration
● may be low or low- week lockout of the rate of change of frequency load shedding protection
● The rate of change of the voltage through the voltage splitting lockout protection
● dispersed Disturbance
● PT break blocking
● Protect export control word using the trip mode choice , flexible tuning
Control Function Deployment
● 11 road open into the strong electric remote signal acquisition
● device power failure alarm , emergency signal device , the device alarm signal
● analog telemetry : Ua, Ub, Uc, U0, Uab, Ubc, Uca, F
● 2 -way pulse input
● 1 -way GPS time
Second, the principle that the protection of
2.1, the zero-sequence overvoltage
Real-time computing device and zero-sequence overvoltage discrimination Sec .
Sec device when performing zero-sequence overvoltage discrimination , discrimination logically consistent paragraphs , which action the following conditions:
1) 3U0> U0n; I0n: zero sequence overvoltage N segment setpoint
2) T> T0n; T0n: zero sequence overvoltage N segment delay value
Which is zero -sequence voltage 3U0 , Uod1 zero sequence overvoltage splitting segment Ⅰ value , Uod2 zero sequence over Ⅱ segment setpoint pressure splitting
2.2 , low cycle splitting
The frequency can achieve decentralized control , when the system frequency is below tuning frequency, this component will automatically determine whether removal of the load .
Frequency load shedding is provided a functional logic slip blocking element to distinguish the fault condition , the motor reverse charging and truly meritorious shortfall. Consider frequency load shedding feature role in the steady state only , so take the AB phase voltage calculation , still add three phase voltage during the test. When this voltage (UAB) is lower than the frequency of calculation of voltage lockout , low cycle load shedding device will automatically exit .
2.3 , voltage splitting
With this device , you can achieve low-voltage control when the system voltage is below the set voltage , the device will automatically determine whether the removal of the load .
Voltage splitting logic elements are:
2.4, PT break detection
One of the following three conditions are met, the device reported hair "PT disconnected " message and warning lights lit :
One of the following three conditions are met, the device reported hair "PT disconnected " message and warning lights lit :
One of the following three conditions are met, the device reported hair "PT disconnected " message and warning lights lit :
a) Three-phase voltages are less than 8V, sentenced to three-phase pressure loss .
b) three-phase voltage greater than 8V, the minimum line voltage is less than 16V, sentenced to two-phase or single-phase PT disconnected.
c) three-phase voltage greater than 8V, the maximum and minimum line voltage line voltage difference is greater than 16V, sentenced to two-phase or single-phase PT disconnected.
PT disconnection detection function can be cast back through the control word.
2.5 , data record
The device has a fault recorder function. Analog recording is available Ua, Ub, Uc. All data records stored in FLASH RAM in the information data , the PC can be read. Recorded wave reports record is eight more than the total time for each recorded data capacity of 1S, separated into two records, motion capture and adjust the recording time. Events can be recorded no less than 1000 times. In addition to the device data recording system disturbances , but also recording device operation event status bit input quantitative event , change event and setting alarm events and other devices .
2.6 , remote telemetry, remote control
The main function remote control : All exports can be remotely controlled.
Remote measurements are mainly : UA, UB, UC, UAB, UBC, UCA, F. All these quantities are calculated in real time and calculate the local network does not depend on an accuracy of 0.5 .
Remote Communication are: 16 remote communication open into , remote communication device displacement and accident remote, and for recording the sequence of events , remote resolution of less than 2ms.
Third, tuning and event information devices
3.1 List and description of the setting value
No. Name value range Unit Remarks
A control word of a 0000 ~ FFFF no see control word description
2 control word二0000 ~ FFFF no spare
3 zero-sequence overvoltage splitting segment Ⅰ 1 ~ 120.0 V
4 zero sequence overvoltage segment Ⅰ time 0 ~ 50.00 S
5 zero-sequence overvoltage splitting Ⅱ paragraph 1 ~ 120.0 V
6 zero-sequence overvoltage period of time Ⅱ 0 ~ 50.00 S
7 voltage splitting segment Ⅰ 1 ~ 120.0 V
8 Section Ⅰ voltage splitting time 0 ~ 50.00 S
9 voltage splitting Ⅱ paragraph 1 ~ 120.0 V
10 voltage splitting a time Ⅱ 0 ~ 50.00 S
11 voltage splitting latching current 0.2 ~ 100.00 A
12 voltage splitting blocking voltage 10 ~ 120.00 V
13 blocking voltage change rate 1 ~ 60.00 V / S
14 week low splitting segment Ⅰ 45 ~ 49.5 HZ
15 Section Ⅰ low cycle splitting time 0 ~ 50.00 S
16 week low splitting Ⅱ paragraph 45 ~ 49.5 HZ
17 week low splitting Ⅱ period of time 0 ~ 50.00 S
18 week low shedding blocking voltage 10 ~ 120.0 V
19 week low shedding atresia slip 0.5 ~ 20.00 HZ / S
Control word 1 Definition:
Meaning Bit 0 is set to 1 when the meaning set
15 PT PT break into disconnected exit
14 CT rated current of 1A CT rated current of 5A
13 low- splitting through current blocking voltage splitting without current blocking
0-12 spare spare
3.2 Protection plate Description
Corresponding function name plate
Zero sequence overvoltage splitting segment Ⅰ zero sequence overvoltage splitting function segment Ⅰ cast back
Zero sequence overvoltage splitting Ⅱ segment splitting zero sequence overvoltage feature cast back section Ⅱ
Low voltage splitting splitting segment segment Ⅰ Ⅰ feature cast back
Low voltage splitting splitting section Ⅱ Ⅱ segment features cast back
Low cycle splitting segment Ⅰ Ⅰ low cycle splitting segments feature cast back
Splitting low cycle section Ⅱ Ⅱ low cycle splitting segment features cast back
Spare a standby function cast back
Spare 2 Spare feature cast back
Spare 3 alternate function cast back
Alternate alternate function 4 cast back
