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All signals are reset if:
•
the direction of movement reverses
•
the rotor angle detector resets without a slip being counted or
•
no rotor relative movement was detected during the time
ResetTime.
Vcos
< 0.92 VBase
ANSI07000005.vsd
Imin > 0.10 IBase
0.2
Slip.Freq.
8 Hz
AND
startAngle
AND
PICKUP
Z cross line ZA - ZC
Z cross line ZC - ZB
AND
AND
ZONE1
ZONE2
Counter
N1Limit
a
b
a
b
tripAngle
AND
TRIP1
Counter
N2Limit
a
b
a
b
AND
TRIP2
OR
TRIP
ANSI07000005 V2 EN-US
Figure 198: Simplified logic diagram for pole slip protection PSPPPAM (78)
7.10.8
Technical data
SEMOD175138-1 v1
GUID-88E02516-1BFE-4075-BEEB-027484814697 v2
Table 162: PSPPPAM (78) technical data
Function
Range or value
Accuracy
Impedance reach
(0.00 - 1000.00)% of Zbase
±2.0% of V
n
/I
n
Zone 1 and Zone 2 trip
counters
(1 - 20)
-
Section 7
1MRK 502 066-UUS B
Impedance protection
374
Technical manual
Summary of Contents for Relion 670 series
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