No
Protection function
No.
Protection function
1
Cut-off acting
8
2
Two segment time limit
overcurrent
9
Overvoltage protection
3
Reverse time overcurrent
10
Low voltage protection
4
Overload
11
Low frequency load shedding
5
Post-acceleration
12
Power direction
6
Reclose
13
PT disconnection
7
Zero sequence overcurrent
Content
Index
Overc
urrent
Zero
sequence
overcurrent
Reclose
Post
acceleratio
n
Low
frequency
load
shedding
Low
voltage
protection
Overvoltage
protection
Voltage fixed
value
0.1Un-
1Un
0.5Un-1.3Un
Current fixed
value
0In -
20In
0In -20In
0In -20In
Time fixed
value
0s-
60s
0s- 60s
0.02s- 1s
0s - 60s
0s- 60s
Fix value error
<5%
<5%
<5%
<5%
Optional fixed
value error
<5%
Reclosing time
0.1s-25s
Sensitive angle 30°.4
5°.60°
Frequency error
<0.01Hz
Low frequency
fixed value
46-54Hz
Low voltage
blocking fixed
value
0Un-
1Undf/dt
df/dt blocking
fixed value
0Hz/s -
10Hz/s
Current
blocking fixed
value
0In-1In
0.1In-1In
4.KPM83L Microcomputer
line
protection measurement and
control device
4.1
Overview
KPM83L Microcomputer
line
protection measurement and control device is mainly used for circuit
comprehensive protection, control and measurement under 35KV voltage.
4.2
Protection
function
4.3 Measurement and control
16 wire telesignalling digital input acquisition
Remote control of circuit breaker, signal output(alarm signal, protection action signal, power
disappearance signal,
Reclose
action signal,
cut-off acting
signal, overcurrent action signal, zero-
sequence overcurrent signal);
IA, IB, IC, U
a
, U
b
, U
c
, la2, lb2, lc2, 0U, I0, P, , QF, COS ф
medium analog value;
E
vent
sequence
recording
(
SOE
)
wo
n
'
t los
s when there is power loss.
4.4 Technical parameters
-9-
