Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
364
Figure „Asynchronous Motor“ in Appendix A.3 shows a typical connection of the protection relay to a large
asynchronous motor. The voltages for voltage and zero voltage monitoring are usually taken at the busbar.
Where several motors are connected to the busbar, the directional earth fault protection detects single-pole
earth faults and can thus open breakers selectively. A toroidal transformer is used for detection of the earth fault
current.
Factor 213 FACTOR IEE2 considers the transformation ratio between the primary and the secondary side of
the summation current transformer I
EE2
.
Binary Inputs and Outputs
Allocation possibilities of binary inputs and outputs, i.e. the individual matching to the system, are described in
the SIPROTEC 4 System Description /1/. The default settings of the device are listed in Appendix A, Section
A.4. Check also whether the labelling corresponds to the allocated message functions.
Changing Setting Groups
If binary inputs are used to change setting groups, please observe the following:
• If the configuration is performed from the operator panel or using DIGSI, the option via Binary Input must
be selected at address 302 CHANGE .
• One binary input is sufficient for controlling 2 setting groups, „>Param. Selec.1“.
• If the binary input is configured as a make circuit, i.e. as active when voltage is applied (H active), the sig-
nificance is as follows:
- not activated: Parameter set A
- activated: Parameter set B
• The control signal must be continuously present or absent in order for the selected setting group to be and
remain active.
Trip Circuit Supervision
A circuit with two binary inputs (see Section 2.43) is recommended for trip circuit monitoring. The binary inputs
must have no common potential, and their operating point must well below half
the rating of the DC control volt-
age.
Alternately when using only one binary input, a resistor R is inserted (see Section 2.43). Please note that the
response times are as long as approx. 300 s. Section 2.43.2 shows how the resistance is calculated.
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