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Mounting and Commissioning
3.3 Commissioning
3.3.9
Checking the DC Voltage / DC Current Circuit
Preparation
Set the DC voltage/DC current protection (address 7201 DC PROTECTION) to Block relay.
You can now modify the plant voltage to match the conditions of the intended application, and verify the re-
sponse of the 7UM62. Overshoot or undershoot (selected at address 7203) of the threshold voltage (address
7204) is followed by indication „DC Prot.pick.up" (not allocated on delivery), and after a time T DC = (ad-
dress 7206) indication „DC Prot. TRIP" (not allocated on delivery).
The DC voltage protection is then enabled (address 7201 DC PROTECTION = ON) or – if it will not be used –
disabled (DC PROTECTION = OFF).
3.3.10
Trip/Close Tests for the Configured Operating Devices
Control by Local Command
If the configured operating devices were not switched sufficiently in the hardware test already described, all
configured switching devices must be switched on and off from the device via the integrated control element.
The feedback information of the circuit breaker position injected via binary inputs is read out at the device and
compared with the actual breaker position. For devices with graphic display, this is easy to do with the control
display.
The switching procedure is described in the SIPROTEC 4 System Description. The switching authority must
be set in correspondence with the source of commands used. With the switching mode, you can choose
between locked and unlocked switching. In this case, you must be aware that unlocked switching is a safety
risk.
Switching from a Remote Control Centre
If the device is connected to a control centre via a system interface, the corresponding switching tests may also
be checked from the control centre. Please also take into consideration that the switching authority is set in
accordance with the source of commands used.
3.3.11
Commissioning Test with the Machine
General Information
WARNING!
Warning of hazardous voltages when operating electrical devices
Nonobservance of the following measure will result in death, severe personal injury or substantial property
damage.
Only qualified people shall work on and around this device. They must be thoroughly familiar with all warnings
and safety notices in this instruction manual as well as with the applicable safety regulations, and precautionary
measures.
For the commissioning switching operations have to be carried out. A prerequisite for the prescribed tests is
that these switching operations can be executed without danger. They are accordingly not meant for operation-
al checks.
414
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
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