
12
The manual "General characteristics of C type
relay modules", describes how submenus and
setting modes are entered and escaped from and
how setting is carried out. Further the manual
describes how the TRIP-TEST mode of the
relay module works.
Main menus and
submenus for
settings and
registers
The figure below shows the menus and sub-
menus of the directional neutral overcurrent
relay module.
Display off. Normal state
SUBMENU
STEP FORWARD 1 s
STEP BACKWARD 0.5 s
S
T
E
P
B
A
C
K
W
A
R
D
.5
s
S
T
E
P
F
O
R
W
A
R
D
1
s
MAIN MENU
SUBMENU
STEP 0.5 s RESET 1 s
Residual voltage Uo
M
A
I
N
M
E
N
U
Remotely set
percentage p1
Present start current,
low-set stage I
ϕ
>
Remotely set start
current I
ϕ
> x p1
Remotely set
percentage p2
Present operate time t>,
low-set stage I
ϕ
>
Remotely set operate
time t> x p2
Remotely set
percentage p3
Present start current,
high-set stage I
ϕ
>>
Remotely set start
current I
ϕ
>> x p3
Remotely set
percentage p4
Present operate time t>>,
high-set stage I
ϕ
>>
Remotely set operate
time t>> x p4
Present checksum,
switchgroup SG1
Remotely set
checksum
Remotely set
checksum
Checksum
of SG2
Recorded maximum value of the neutral current I
ϕ
Recorded maximum value of the residual voltage Uo
Number of starts of the residual voltage stage Uo
1
2
3
4
0
000
SS1
TS1
TS2
IRF
SS2
Incoming control signals
0
Relay module
address code
Data transfer
rate (Bd)
Bus communication
monitor 0 ... 255
Password
A
=Parameter that can be set in the setting mode
Neutral current Io
Set current I
ϕ
Number of starts of the neutral overcurrent stage I
ϕ
>
5
Number of starts of the neutral overcurrent stage I
ϕ
>>
6
Duration of the latest start event of the stage I
ϕ
>
7
Duration of the latest start event of the stage I
ϕ
>>
Checksum
of SG3
8
Recorded maximum value of the neutral current Io