Toshiba GRL100-701B Instruction Manual page 257

Earth fault element reach test
The test circuit is shown in Figure 6.5.1.7.
Three-phase
voltage
source
A
Single-phase
current
source
+
DC
power
−
supply
DC
voltmeter
Figure 6.5.1.7 Testing Earth-Fault Element
Earth fault elements and their output signal number are listed below.
Measuring element
Z1G-A
Z2G-A
Z3G-A
Z4G-A
ZRG-A
PSBGIN-A
PSBGOUT-A
• Press 5 (=Logic circuit) on the Test screen to display the Logic circuit screen.
• Enter a signal number to be observed at monitoring jack A and press the ENTER key.
• Apply three-phase rated voltage.
•
Choose a test current IT by referring to the table below, the table shows the relationship
between the reach setting, test current and measuring error.
Reach setting
0.01 - 0.05Ω
(0.1 - 0.2Ω
0.06 - 0.09Ω
V
φ
Signal number
560
563
566
569
572
590
587
IT
25A
5A)(*)
20A
 256 
GRL100
TB1
-11
V a
-12
V b
-13
V c
-14
Monitoring
jack
TB1
-1
I a
-2
-7
3I o
-8
TB4
-A16
-A17
E
Error
±10%
±7%
6 F 2 S 0 8 5 0
A
0V