1 Introduction
2
7UM62 Manual
C53000-G1176-C149-3
1.1
Overall Operation
The SIPROTEC
®
4 7UM62 is a numerical, multi-functional, protective and control
device equipped with a powerful microprocessor. All tasks, such as the acquisition of
the measured quantities, issuing of commands to circuit breakers and other primary
power system equipment, are processed in a completely digital way. Figure 1-1
illustrates the basic structure of the 7UM62.
Analog Inputs
The measuring inputs (MI) section consists of current and voltage transformers. They
convert the signals from the primary transformers to levels appropriate for the internal
processing of the 7UM62.
Eight current inputs are available in the MI section. Three inputs are used on each side
of the protected object for measuring of the phase currents. 2 current inputs are
To
PC
To
SCADA
Operator
Control Panel
U
aux.
up to 15 Binary Inputs,
Power Supply
MI
IA
AD
µC
AV
Figure 1-1
Hardware Structure of the Numerical Device 7UM62 (Maximum Configuration)
Status
PC/
Modem
Programmable
µC
∩
#
Error
Run
Output
Relays, User-
Programmable
LEDs
on the Front
Panel, User-
Programmable
Display on
Front
Operator Interface
System
Serial Interface
I
L1, S1
I
L2, S1
I
L3, S1
I
EE1
U
L1
U
L2
U
L3
7
8
9
4
5
6
1
2
3
.
0 +/-
ESC
ENTER
Rear
Service Interface
U
N
I
EE2
I
L1, S2
I
L2, S2
I
L3, S2
3 Measuring
Transducers
Analog
Outputs
the Front Panel
Analog
pro-
cessing
~
(PC Port)
