Timer Test - Toshiba GRT100 Series Instruction Manual

Operating time characteristic test
The testing circuit is shown in Figure 6.5.15.
Single-phase
voltage
source

DC
power

supply
Start
Time
counter
Stop
OV
Figure 6.5.15 Operating Time Characteristic Test of V/F (Model 100s, 200s)
The testing procedure is as follows:
 Press 4 (= Logic circuit) on the "Test" sub-menu screen to display the "Logic circuit"
screen.
 Enter a signal number 81 to observe the inverse time tripping output at monitoring jack A
and press the ENTER key.
 Apply a test voltage at rated frequency and measure the operating time. The magnitude of
the test voltage should be between (V setting)  (L setting) and (V setting)  (H setting).
 Calculate the theoretical operating time using the characteristic equations shown in
Section 2.11.8 where V is the test voltage. Check that the measured operating time is from
15% to 10% of the calculated value.
6.5.2

Timer Test

The pick-up delay time of the variable timer can be measured by connecting the monitoring jacks
A and B to a time counter as shown in Figure 6.5.15. Jacks A and B are used to observe the input
signal and output signal of the timer, respectively.

DC
power

supply
Start
Time
counter
Stop
0V
Figure 6.5.16 Testing Variable Timer (Model 100s, 200s)
V
 130 
6 F 2 S 0 7 8 9
GRT100
TB 1 -27
V
-28
A
TB 4 - A16
Monitoring
jack
0V
- A17
E
GRT100
TB 4 - A16
Monitoring
- A17
jack
E
A
B
0V