261
6
F
2
S
0
8
3
4
•
Decrease the voltage and measure the value at which the element operates. Check that the
measured value is within
±
5% of the setting.
Operating time check of OVS1, OVG1, UVS1, UVG1 IDMT curves
•
Apply a rated voltage at the IDMT time multiplier setting 10.0 of the relay.
•
Change the voltage from the rated voltage to the test voltage quickly and measure the
operating time. Test voltage: 1.5
×
(setting voltage) or 0.5
×
(setting voltage)
•
Calculate the theoretical operating time using the characteristic equations shown in Section
2.4.9.1 and 2.4.9.2. Check the measured operating time within
±
5%.
6.5.1.10 Voltage and Synchronism Check Elements
The testing circuit is shown in Figure 6.5.1.7. If scheme switch [3PH-VT] is set to "Bus", the
three-phase voltage simulates the busbar voltage, and the single-phase voltage simulates the line
voltage. If the switch is set to "Line", the opposite is true.
Three-phase
voltage
source
φ
V
TB1
-12
-11
Single-phase
voltage
source
DC
voltmeter
-13
-14
-15
-18
-16
-17
-A16
-A17
E
TB4
V
S1
V
S2
GRZ100
DC
power
supply
+
−
Monitoring
jack A
A
0V
V
Va
Vb
Vc
(*) In case of testing OVL2, UVL2, and SYN2.
(**) In case when [VT-RATE] is set to "PH/PH".
(*)
(**)
Figure 6.5.1.7 Testing Synchronism Check Elements
When testing OVL2, UVL2 and SYN2, the single-phase voltage must be applied to terminal 17
and 18, instead of 15 and 16 and 3PH-VT is set to "Line".
Voltage and synchronism check elements and their output signal number are listed below. OVL2,
UVL2 and SYN2 are used for two-breaker autoreclose and provided in Model 300s.
Measuring element
Signal number
OVB 86
UVB 87
OVL1 89
UVL1 90
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Summary of Contents for GRZ100-211B
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