EasyManuals Logo

Siemens SIPROTEC 7SJ80 User Manual

Siemens SIPROTEC 7SJ80
562 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #289 background imageLoading...
Page #289 background image
Prerequisites
Except for secondary values, the device is able to indicate the primary values and percentages of the measured
values.
A precondition correct display of the primary and percentage values is the complete and correct entry of the
nominal values for the instrument transformers and the protected equipment as well as current and voltage
transformer ratios in the ground paths when configuring the device. The following table shows the formulas
which are the basis for the conversion of secondary values to primary values and percentages.
When using the connection types Vab, Vbc or Vab, Vbc, Vx of the voltage transformers (address 213 VT
Connect. 3ph), the measured values for power P, Q, S, power factor, energy and the derived values, such as
mean values etc. are not available.
Measured values which cannot be calculated due to the selected voltage connection are shown as dots.
Display of Measured Values
Table 2-21 Conversion formulae between secondary values and primary/percentage values
Measured
Values
sekun-
dary
primary %
Ι
A
, Ι
B
, Ι
C
,
Ι
1
, Ι
2
Ι
sec.
Ι
E
= 3 ·Ι
0
(calculated)
Ι
e sec.
Ι
N
= measured
value of Ι
N
-input
Ι
N sec.
Ι
Ns
(ΙNs,
Ι
3I0real
,
Ι
3I0reakctiv
)
Ι
Ns sec.
Ι
N2
= measured
value from the
Ι
E2
input
Ι
N2 sec.
V
A
, V
B
, V
C
,
V
0
, V
1
, V
2
,
V
syn
V
Ph-N sec.
V
A–B
, V
B–C
, V
C–A
V
Ph-Ph sec.
V
N
V
N sec.
V
x
V
x sec.
P, Q, S (P and Q
phase-segre-
gated)
No secondary measured values
Power Factor
(phase-segre-
gated)
cos φ cos φ cos φ · 100 in %
Frequency
Protection
f in Hz f in Hz
2.23.3.1
Functions
2.23 Auxiliary Functions
SIPROTEC 4, 7SJ80, Manual 289
E50417-G1140-C343-A8, Edition 12.2017

Table of Contents

Other manuals for Siemens SIPROTEC 7SJ80

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Siemens SIPROTEC 7SJ80 and is the answer not in the manual?

Siemens SIPROTEC 7SJ80 Specifications

General IconGeneral
Rated Frequency50/60 Hz
Rated Current1 A / 5 A
Operating Temperature-25°C to +55°C
Storage Temperature-40°C to +70°C
Current Transformer Inputs4
ApplicationProtection of feeders, motors, transformers, and generators
Rated Voltage100-240 V AC/DC
Communication ProtocolsIEC 61850, Modbus, DNP3, IEC 60870-5-103
DisplayGraphical LCD
MountingFlush mounting
Protection FunctionsOvercurrent, Earth fault
Communication InterfacesEthernet, RS485
HousingPlastic
WeightApprox. 1.5 kg

Related product manuals