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1.
Survey of Types (ordering codes)
Inverse-time overcurrent relay system 7SK88 In a compact case
"
For Currel'll
Ir anslor mer
rated Curre
Setting range
of
751<88
Supply voltage
UV
60 V
d,c.
\',0 V
d.c.
Supply from
Weigl'll.
1125
V
d.c
1220
V
d.&:.
current
I'll
transformer
approx
Order No.
Order No.
Order No_
Order No.
A
A
(for the Order No, suffix see below)
kg
--
01 to
0.4
75K8.12-••
75K"1~
.•
75K •• 14-.•
75K8.15-.•
75KII 11-..
02
to
0_8
22-••
2~
.•
24-.•
25-••
21-..
1,5
lor
5
*
lor 5
*
0,5
to
2
32-••
3~
••
34-.•
35-••
31-..
I CT. powerd
5
5
1
to
4
2_5
to
10
4
to 18
42-..
4~
.•
52-.•
5~
..
12-.•
Uo-••
44-••
45-.•
41-..
version 1,8)
54-.•
55-••
51-..
64-.•
a5-.•
61-..
• In this case, the
5
A c.t. shall be in the earth fault circuit.
Thus a higher sensitivity is achieved.
Order No. suffix for7SK88
Characteristic and optional element
I~
--------------------.--
--------~----
Characteristic
Short-circuit instantaneous trip
I~
not fitted
fitted
Order No. suffix 7SK88 •• -
-------------------------
Inverse
1DA
1EA
Very inverse
3DA
3EA
~E~x~t~r~e~m~e~1~y~~i~n~v_e_r_s_e
____ 4_D_A ______________________ 4EA
Continuous technological progress and modernisation of components
may necessitate production modifications. These modifications
do not affect relay performance and are recorded, for internal
purposes only, by two letters after the code (MLFB) number (e.g.
7SK8818-1DA/DD).
Test adapteJ for 7SK88
7XV8110
1XV8120
Test adapter cable with banana plugs
Test adapter cable with Harting plug
for testing with 7VP461
(
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