⎯ 134 ⎯
6 F 2 S 0 8 5 7
Single-phase
current
source
A
TB1
Time
counter
TB4
a
I
-1
Monitoring
j
ack
Start
Stop
OV
-2
-
A
16
-
A
17
E
GRT100
DC
power
supply
+
−
A
0V
Figure 6.5.4 Operating Time Test (Model 100s, 200s)
• Set a test current to 3 times of DIF operating current (= CT secondary rated current × ik
setting).
• Apply the test current and measure the operating time.
• Check that the operating time is 40 ms or less.