Toshiba GRT100 Series Instruction Manual page 130

6.5.1.10 Overexcitation element V/F
The overexcitation element is checked on the following items
 Operating value of definite time tripping and alarm characteristic
 Operating time of inverse time tripping characteristic
The output signal numbers of the V/F elements are as follows:
Element
V/F
Operating value test for definite time tripping and alarm
The testing circuit is shown in Figure 6.5.14.

Single-phase
voltage
source


DC
power

supply

DC
voltmeter

Figure 6.5.14 Operating Value Test of V/F (Model 100s, 200s)
 Set V (rated voltage setting) to 100V.
 Press 4 (= Logic circuit) on the "Test" sub-menu screen to display the "Logic circuit"
screen.
 Enter a signal number 80 or 82 to observe the V/F output at monitoring jack A and press
the ENTER key.
 Apply a test voltage at rated frequency and increase the magnitude of the voltage applied
and measure the value at which an alarm signal or a trip signal is output.
Check that the measured values are within 2% of (V setting)  (A setting) for an alarm
signal and (V setting)  (H setting) for a trip signal.
Signal number
80
81
82
V
 129 
Remarks
Definite time tripping
Inverse time tripping
Definite time alarm
TB 1 -27
-28
TB 4 - A16
- A17
E
6 F 2 S 0 7 8 9
GRT100
V
A
Monitoring
jack
0V