Siemens 7sg15 microtapp - 2.1 Energising Quantities; 2.3 Basic Voltage Control; 2.4 Load Drop Compensation

7SG15 MicroTAPP Performance Specification
1. General
These are preliminary performance specification.
2. Characteristics
2.1 Energising Quantities
Single-phase current (any phase) and 3-phase voltages will be measured at 50 or 60Hz.
Measured Quantity Nominal Values Measured Range
V
n
AC Voltage 110V RMS 227% x V
n
I
n
AC Current 1A or 5A RMS 285% x I
n
From these quantities the following will be calculated with the specified accuracies.
Calculated Value Accuracy
RMS Voltage
±0.25% @ 80% x Vn
RMS Current
±5% @ 20% x In
System Frequency
±0.125Hz between 47Hz and 63Hz
System Power Factor
±0.5°
2.2 Measuring Circuit Burden
1A current input
1VA <0.5Ω
5A current input
1VA <0.5Ω
110V voltage input
0.1VA >1MΩ
2.3 Basic Voltage Control
V
t
Target level
85% to 115% step 0.1%
B
w
Bandwidth
0 to ±5% step 0.1%
t
i
Initial Delay
DTL: 2s to 180s step 1s
IDMTL: time setting, target voltage and
deadband to be defined
The relay will use phase A-B r.m.s. voltage for its basic bandwidth calculations.
2.4 Load Drop Compensation
The value is entered as a percent increase in busbar voltage required at the firm capacity of the substation (taking
into account all transformers).
Bs
Bias Level
(at firm capacity)
0 to 20% step 0.1%
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