Simplification of the diagram is in the way the IEEE and Tailor-made delays are calculated. The
cooling process is not shown. It is not shown that voltage and frequency are separately checked
against their respective limit values.
9.4.8 Technical data
M13338-2 v11
Table 360: OEXPVPH (24) technical data
Function Range or value Accuracy
Trip value, pickup (100–180)% of (
VBase
/f
n
) ±0.5% of V
Trip value, alarm (50–120)% of pickup level ±0.5% of V
n
at V ≤ V
n
±0.5% of V at V > V
n
Trip value, high level (100–200)% of (
VBase
/f
n
) ±0.5% of V
Curve type IEEE or customer defined
2
(0.18 )
:
( 1)
×
=
-
TD
IEEE t
M
EQUATION1645 V1 EN-US (Equation 197)
where M = (E/f)/(Vn/fn)
±5.0 % or ±45 ms, whichever is greater
Minimum time delay for inverse
function
(0.000–60.000) s ±1.0% or ±45 ms, whichever is greater
Maximum time delay for inverse
function
(0.00–9000.00) s ±1.0% or ±45 ms, whichever is greater
Alarm time delay (0.00–9000.00) ±1.0% or ±45 ms, whichever is greater
9.5 Voltage differential protection VDCPTOV (60)
SEMOD153860-1 v2
9.5.1 Identification
SEMOD167723-2 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Voltage differential protection VDCPTOV - 60
9.5.2 Functionality
SEMOD153862-5 v7
A voltage differential monitoring function is available. It compares the voltages from two three
phase sets of voltage transformers and has one sensitive alarm step and one trip step.
1MRK 502 066-UUS B Section 9
Voltage protection
647
Technical manual
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