Settings For Directional Ground Overcurrent Protection - Siemens SIPROTEC 7SJ62 Instruction Manual

User Specified
Curves
6.3.2.5

Settings for Directional Ground Overcurrent Protection

Addr. LCD-Text
1601 FCT 67N/67N–TOC
1602 67N–2 PICKUP
1603 67N–2 DELAY
1604 67N–1 PICKUP
1605 67N–1 DELAY
1607 67N–TOC PICKUP
1608 67N–TOC T– DIAL
7SJ62 Manual
C53000-G1140-C121-1
If address  1172& was set to 8VHU 'HILQHG 3LFNXS &XUYH or 8VHU
'HILQHG 3LFNXS DQG 5HVHW &XUYH during configuration of the user-specified
curve option, a maximum of 20 value pairs (current and time) may be entered at ad-
dress  0RI 38 7' to represent the time-current characteristic curve associated
with the 67N-TOC element. This option allows point-by-point entry of any desired
curve.
If address  was set to 8VHU 'HILQHG 3LFNXS DQG 5HVHW &XUYH during
configuration of the user-specified curve option, additional value pairs (current and re-
set time) may be entered at address  to represent the reset curve associated with
the 67N-TOC element.
Current and time values are entered as multiples of the address  and  set-
tings. Therefore, it is recommended that addresses  and  be initially set to
 to simplify the calculation of these ratios. Once the curve is entered, the settings
at addresses  and  may be modified if necessary.
Upon delivery of the device, all time values are set at ∞, preventing pickup of the de-
vice from initiating a trip signal.
When entering user specified curve data, the same instructions apply as in Subsection
6.3.2.1 for the phase elements.
In the list below, the setting ranges and default setting values for the pickup currents
are for a device with a nominal current rating I
= 1 A, divide the Setting Options values and Default Setting values by 5. Consider the
current transformer ratios when setting the device with primary values.
Setting options
ON
OFF
0.25 ~ 175.00 A
0.00 ~ 60.00 sec
0.25 ~ 175.00 A
0.00 ~ 60.00 sec
0.50 ~ 20.00 A
0.05 ~ 3.20 sec
= 5 A. For a nominal current rating I
N
Default Setting Comments
OFF Directional overcurrent
protection enabling
2.50 A Pickup setting of the 67N-2
element
0.10 sec Delay setting of the 67N-2
element
1.00 A Pickup setting of the 67N-1
element
0.50 sec Delay setting of the 67N-1
element
1.00 A Pickup setting of the 67N-
TOC element
0.20 sec Time multiplier T IGp, User
Defined, IEC
Functions
N
Configuration
X X X X X
X X X X X
X X X X X
X X X X X
X X X X X
X X X X
X X X
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