10-7rw600e.pdf
TRANSCRIPT
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
Voltage & Frequency Relay 7RW600
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
Voltage and frequency relay 7RW600
?Based on 7SJ600, with 2 voltage inputs
? Implemented functions/ options
? U>>; U>; U; f>; U>; U: f(4-step frequency and df/dt supervision)
? U>>; U>; U>
?Local and remote operation with DIGSI
?Display of measured values,stored annunciations
?Fault recording (momentary and RMS values)
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
4-step frequency supervision (f>, f
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
Over- and undervoltage supervision (U>, U
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
Rate-of-change-of-frequency supervision df/dt>
?Frequency calculations via filter algorithms; calculation of themomentary frequency change
?Suppression of interferences
?4-step rate-of change-of frequency supervision responding to
frequency reduction + additional frequency release?Range of frequency change: 1 - 10 Hz/s;
?Connection of voltage measurement input U (terminal 7-8)to the line-to-line voltage of the VTs
?Blocking of frequency measurement on occurance of undervoltage
?
Application: load sheddingnetwork disconnection
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
Overfluxing (overexcitation) protection U/f>
?Frequency and voltage calculation via filter algorithms;calculation of the overexcitation U/f (proport. induction B)
?Suppression of interferences
?one definable inverse-time characteristic (thermal replica)
and one definite-time stage?Frequency range: 25 Hz to 70 Hz
?Connection of voltage measurement input U (terminal 7-8)to the line-to-line voltage of the VTs
?Correction of VT mismatching
?
Application: overexcitation protection fortransformers and generators
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
7RW600 connection diagramHousing for panel flush mounting
BE 1
11
12
14
15
13
RS 485
27
28
29
7
8
9
10
U
Ux
U >, U >>, U , f , df/dt >
Ux >, Ux >>, Ux , Ux >>, Ux < )
U
Ux
7RW600
.
. . .. ...
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
7RW600 Connection example 2
L 1 L 2 L 3
7RW600
U
protection functionacc. version
( e.g. U, f, df/dt, U/f )
Ux
.
.
.
...
.
voltage supervision
only
( e.g. Ux > )
e
n.
Input Ux can also be connected to a different VT
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Voltage/ frequency relay7RW600
EV SProtection and Substation Control Systems
7RW600 Technical data
Auxiliary voltage 24/ 48 V DC60/ 110/ 125 V DC220/ 250 V DC; 115 V AC
Rated voltage UN 100 - 125 V
Voltage protection:U>, t; U>>, t
U, t
7 pts U/f preselected t: 0 - 20000sin steps of 1s
U/f: 1.00-1.40; t: 0.00 - 60.00 sin steps of 0.01 in steps of 10ms