1 function configuration
Protection
Function model
Overvoltage protection
Low voltage protection
Busbar earthing protection
The two breaking protection circuit of PT
PT bus voltage measurement
2 functional description
2.1 overvoltage protection
When Max (UAB, UBC, UCA) is larger than the setting value, over voltage protection by setting the time delay.
2.2 low voltage protection
Three phase to phase voltage is less than the low voltage protection setting value is greater than 0.15Un
2.3 bus grounding protection
3U0 is greater than the protection setting value, by setting the time delay.
Alarm PT 2.4 bus line
1, the three-phase voltage and greater than 8V, the minimum line voltage is less than 16V, convicted of two-phase or single-phase PT disconnection.
2, three phase voltage and line voltage is more than 8V, the maximum and minimum line voltage difference is greater than 16V, convicted of two-phase or single-phase PT disconnection.
Soft pressing plate 3.1 device setting
Model HRS9072
Over voltage protection system
Low voltage protection system
The bus bar grounding protection system
Bus PT disconnection alarm system
Note: 1 soft plate only two values: investment, exit. Device factory, soft plate were setting out.
The 3.2 device setting
Name symbol tuning range note
1 Public PT break detection switching control PTDXbs
2 overvoltage
Protection of overvoltage protection switching control UHnf 0 ~ 2
The 3 voltage line voltage setting value VUH 20 ~ 150V
4 voltage delay values of tUH ranged from 0.1 to 99.99S
5 low voltage protection of low voltage and switching control UHnf 0 ~ 2
6 low voltage line voltage setting value VUL 10 ~ 150V
7 low voltage protection delay values of tUL ranged from 0.1 to 99.99S
The 8 ground
Protective earthing switching control UHnf 0 ~ 2
The 9 grounding voltage setting value VU0 10 ~ 150V
The 10 grounding protection delay values of tU0 ranged from 0.1 to 99.99S
11 non electric quantity
The protection of non electric quantity 1 trip or alarm control FDL1nf 0 ~ 2
12 non electric 1 delay values of tFDL1 ranged from 0.01 to 99.99S
13 non electric 2 trip or alarm control FDL2nf 0 ~ 2
14 non electric 2 delay values of tFDL2 ranged from 0.01 to 99.99S
The 3.3 device parameter tuning
Name of symbols
1 device management device address ADDR 1 ~ 110
The 2 device password PASSWORD 0 ~ 99
3 baud BTL 0 ~ 9
4 AC rated value
PT 5 a current rating Sec.UN 0 ~ 999.9KV
4 protection principle wiring diagram