Setting Notes - Siemens siprotec SJ62 User Manual

2.4.2

Setting Notes

General
Time Delays
Non-Directional
50/51 Elements
(Phases)
Non-Directional
50N/51N Elements
(ground)
Directional 67/67–
TOC Elements
(Phases)
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
The dynamic cold load pickup function can only be enabled if address 117 Coldload
Pickup was set to Enabled during configuration of the protective functions. If not re-
quired, this function should be set to Disabled. The function can be turned ON or OFF
under address 1701 Coldload Pickup.
Depending on the condition that should initiate the cold load pickup function address
1702 Start Condition is set to either No Current, Breaker Contact or to 79
ready. Naturally, the option Breaker Contact can only be selected if the device
receives information regarding the switching state of the circuit breaker via at least one
binary input. The option 79 ready modifies dynamically the pickup thresholds of the
directional and non-directional time overcurrent protection when the automatic reclos-
ing feature is ready. To initiate the cold load pickup the automatic reclosing function
provides the internal signal "79M Auto Reclosing ready". It is always active when auto-
reclosure is available, activated, unblocked and ready for a further cycle (see also
margin heading "Controlling Directional/Non-Directional Overcurrent Protection Ele-
ments via Cold Load Pickup" in Section 2.14.6).
There are no specific procedures on how to set the time delays at addresses 1703 CB
Open Time, 1704 Active Time and 1705 Stop Time. These time delays must be
based on the specific loading characteristics of the equipment being protected, and
should be set to allow for brief overloads associated with dynamic cold load condi-
tions.
The dynamic pickup values and time delays associated with non-directional time over-
current protection are set at address block 18 (50C.../51C...) for phase currents:
The dynamic pickup and delay settings for the 50N-2 element are set at addresses
1801 50c-2 PICKUP and 1802 50c-2 DELAY respectively; the dynamic pickup and
delay settings for the 50N-1 element are set at addresses 1803 50c-1 PICKUP and
1804 50c-1 DELAY respectively; and the pickup, time multiplier (for IEC curves or
user-defined curves), and time dial (for ANSI curves) settings for the 51N element are
set at addresses 1805 51c PICKUP, 1806 51c TIME DIAL, and 1807 51c TIME
DIAL, respectively.
The dynamic pickup values and time delays associated with non-directional time over-
current ground protection are set at address block 19 (50NC.../51NC...):
The dynamic pickup and delay settings for the 50N-2 element are set at addresses
1901 50Nc-2 PICKUP and 1902 50Nc-2 DELAY respectively; the dynamic pickup
and delay settings for the 50N-1 element are set at addresses 1903 50Nc-1 PICKUP
and 1904 50Nc-1 DELAY respectively; and the pickup, time multiplier (for IEC curves
or user-defined curves), and time dial (for ANSI curves) settings for the 51N element
are set at addresses 1905 51Nc PICKUP, 1906 51Nc T-DIAL, and 1907 51Nc T-
DIAL, respectively.
The dynamic pickup values and time delays associated with directional overcurrent
phase protection are set at address block 20 (g67C...):
The dynamic pickup and delay settings for the 67-2 element are set at addresses
2001 67c-2 PICKUP and 2002 67c-2 DELAY respectively; the dynamic pickup and
delay settings for the 67-1 element are set at addresses 2003 67c-1 PICKUP and
2004 67c-1 DELAY respectively; and the pickup, time multiplier (for IEC curves or
user-defined curves), and time dial (for ANSI curves) settings for the 67-TOC element
2.4 Dynamic Cold Load Pickup
120