Differential Protection Commissioning Mode - Siemens SIPROTEC 7SD610 Manual

2.2.2.3 Differential Protection Commissioning Mode

General
In differential protection commissioning mode (commissioning mode in the following), the differential protection
does not generate TRIP commands. The commissioning mode is intended to support the commissioning of the
differential protection. It can be used to check the differential and restraint currents, to visualise the differential
protection characteristic and thus the operating point of the differential protection. By changing parameters, the
operating point can be changed without risk up to the generation of a trip.
The commissioning mode is activated on one device of the protection device constellation and also affects the
other device (indication No. 3193 „Comm.Diff act."). The commissioning mode has to be deactivated on
the device on which it was activated.
The commissioning mode can be activated/deactivated as follows:
• Using the integrated keypad: Menu Control/Taggings/Set: „Commissioning mode"
• Via binary inputs (No. 3260 „>Comm. Diff ON", No. 3261 „>Comm. Diff OFF") if this was allocated
• In DIGSI with Control/Taggings: „Diff: Commissioning mode"
Principle of function
In the following, the logic is shown in a simplified way:
Figure 2-11
There are two ways to set the commissioning mode. The first way is to use a command (commissioning mode
on / commissioning mode off) which is generated either when operating the integrated keypad or when oper-
ating with DIGSI. The second way is to use the binary inputs (No. 3260 „>Comm. Diff ON", No. 3261
„>Comm. Diff OFF").
Depending on the way used for controlling the commissioning mode, either the indication „Comm
Diff.ONoff" (No. 3262) or „CommDiffONoffBI" (No. 3263) is generated. The way used for deactivating
the commissioning mode always has to be identical to the way used for activating. The indication „Comm.
Diff" (No. 3191) is generated independently of the chosen way.
The following figures show possible variants for the control of the binary inputs. If a switch is used for the control
(Figure 2-13), it has to be considered that binary input „>Comm. Diff ON" (No. 3260) must be parameterized
as NO contact and that binary input „>Comm. Diff OFF" (No. 3261) must be parameterized as NC contact.
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
Logic diagram of the commissioning mode
2.2 Protection Data Interfaces and Protection Data Topology
Functions
57