Voltage Limiting level B SPD
Voltage limiting SPD is usually used in the LPZ1 and LPZ2 zone.It can eliminate The residual voltage on the grid to
the utmost extent and conduct the 8/20μs analogy lightning impulse current.Level B SPD is generally used to prevent
the inference to the low voltage.It has Fault detection and remote alarm functions.we can provide the "3+0","4+0"
and "3+1"protection type according to different power supply system.
The indicator switches from red to green when this system malfunctions.
With Monitor and the tripping device
Remote telesignalling connection(normally closed contact) as the fault indicator
KNFB380-40
KNFB380-60
KNFB380-60/3P+1 wiring schematic drawing
Technical Parameters
KNFB | 510-60 | 510-40 | 380-60 | 380-40 | 220-60 | 220-40 | |
nominal voltage | Un | 510V | 380V | 220V | |||
Max continuous working voltage | Uc | 625V | 460V | 275V | |||
nominal discharge current(8/20μs ) | In | 60KA | 40KA | 60KA |
40KA | 60KA | 40KA |
MAX discharge current(8/20μs ) | LMAX | 120kA | 80KA | 120kA | 80KA | 120kA | 80KA |
Limit voltage IN | UP | ≤4.0KV | ≤3.8KV | ≤2.5KV | ≤2.4KV | ≤2.4KV | ≤2.2KV |
response time | TA | ≤25 ns | |||||
poles | 1P,2P,3P,4P,1P+NPE,3P+NPE | ||||||
environmental temperature | -40℃~+80℃ | ||||||
Protection level | IP20 | ||||||
Install wire section | Min:10mm2 (single line) MAX:16mm2(single line) 25mm2(double line) | ||||||
Installing support | 35MM standard lead rail | ||||||
Remote signal contact type | normally closed contact | ||||||
Terminal type | AC:250V/0.5A DC:250V/0.1A | ||||||
Remote communication terminal conductor cross section | MAX:1.5mm2(single line/Multi line)
| ||||||
Installation and Maintenance
1.DIN 35MM standard rail installation
2.The product adopt the flame retardant ABS housing,fix the products,connect the power lines and ground lines by
the drawing,examine and power up.
3.Grounding is very important to the normal work of SPD.the ground contact area is no less than 25 mm2 and as
short as possible.
4.the products don't need special maintenance while it is on position for a long time .So we should assign some
people to examine regularly.Especially in The thunderstorm season.Once stuck,check it Immediately.
5.The product is equipped with a fault indicator.when working correctly,the indicator shows green,When this system
malfunctions,it shows red.
6.The internal components is with alternating current,be careful when the system is working.
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