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Product description


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Automatic sectionalizer-Drop-out sectionalizer
Date:2018-03-13 10:23 From:Barry Click:

Overview

The sectionalizer is applied in three phase power system with AC 50Hz and rated voltage 10-40.5kV. It is installed on distribution overhead line to isolate fault when corporated with recloser or circuit breaker. When fault occurs on the line, the faults current reaches or exceed preset threshold value, the sectionalizer can remember the tripping times of upstream recloser. When it reaches preset times, it drops down to trip automatically.
Sectionalizer can drop down to trip automatically on the condition as given below:
First, the faults current exceeds presetting pickup current. Second, the counting time reaches presetting value (1, 2, 3 or 4). Third, the circuit loses voltage and the current is lower than 300mA. The Sectionalizer will trip automatically if the aforesaid conditions occur simultaneously. If any of aforesaid conditions doesn’t occur, the Sectionalizer will not trip automatically.
This sectionalizer uses micro-computer and operating trip mechanism and does not require external auxiliary supply.

Main technical data
S/N Name Unit RDK10-12/D315 RDK10-12/D200 RDK□-40.5/D200
1 Rated voltage KV 12 12 40.5
2 Rated current A 200 200 200
3 Rated frequency Hz 50 50 50
4 Pickup current rating A 8~400A 8~400A 8~400A
 
5
Short time withstand
current(RMS)
 
KA
 
10
 
10
 
10
 
6
Short circuit withstand
time
 
s
 
1
 
1
 
1
 
7
Short time withstand
current (PEAK)
 
KA
 
16
 
20
 
20
8 Counting time time 1, 2, 3, 4 1, 2, 3, 4 1, 2, 3, 4
9 Max memory time S 20 20 20
10 Max reset time S 20 20 20
 
11
Permissible deviation of
pick up current for memory rest time
 
%
 
±10
 
±10
 
±10
12 Opening time ms ≤200 ≤200 ≤200
13 Main circuit resistance μ Ω ≤400 ≤400 ≤400
14 Mechanic life Time 500 500 500
 
15
Horizontal pulling force of
terminal
 
N
 
250
 
250
 
250
16 Manual open moment N·m —— —— ——
17 Manual open force N ≤120 ≤120 ≤120
18 BIL(phase to ground) KV 110 185 185
19 BIL(between gap) KV 110 220 22
 
20
PFWV
(phase to ground)
dry  
KV
55 95 95
wet 45 80 80
 
21
PFWV
(between gap)
dry  
KV
55 110 110
wet 45 95 95
22 PFWV of control circuit KV 2 2 2
23 Dirty proof grade Class
24 Ice proof thickness mm ≤7 ≤1 ≤1
 
25
Pickup current (four
classes) and Counting time can be set
   
——
 
YES
 
YES
 
26
Mechanical interlocking
for 3 phase devices and automatic reset
   
——
 
YES
 
YES

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