TD_PCM1x_Packages_Function/Operation_08.04_GB
9
2.3 LEDs
NOTE
The LEDs can be checked via a lamp test. In order to achieve this, the " + " and " - " push-buttons must be pressed si-
multaneously.
1
2
3
UL1 - UL2 - UL3
Color: green
Voltage control
The LEDs "UL1", "UL2" and "UL3" show which voltage (U
L1N
, U
L2N
, U
L3N
, U
L12
, U
L23
or
U
L31
) is currently being displayed. This applies both to the generator and the mains
voltage display.
4 Stop
Color: red
Operating mode "STOP"
If the LED "Stop" is illuminated, the "STOP" mode has been selected. If this LED
flashes, a firing speed is detected in "STOP" mode.
5 -10%..f
N
..+10%
Color: red/yellow/green
Phase position / synchroscope
Normal operation:
The LEDs between -10 % and +10 % (resp. 47.2 Hz and
52.8 Hz) serve to visualize the generator frequency. The rated fre-
quency (f
N
) is entered in the "generator rated frequency" screen. If
the frequency is greater than +10 % (52.8 Hz) or less than -10 %
(47.2 Hz), the corresponding outer LED flashes LED.
Configuration:
If, in configuration mode, the service display is "ON" and the dou-
ble voltage/double frequency display is active, the LEDs show the
current phase angle between the two displayed voltages. The
green LED in the center of the 15 LEDs indicates that the measured
phase angle between the voltage systems displayed is less than
12 ° electrical. The phase angle is only displayed if the frequencies
of the two voltages are within the following permissible ranges:
Generator
88..112 % f
N
Mains
96..104 % f
N
A distinction is made between two directions of rotation:
-10 %
→
+10 %
= On running the LEDs from left to right, the generator frequency
is too high, i. e., the generator is turning too fast;
+10 %
→
-10 %
= On running the LEDs from right to left, the generator frequency
is too low, i. e., the generator is turning too slowly.
6 Automatic
Color: yellow
Operating mode "AUTOMATIC"
If the "Automatic" LED is lit, the "AUTOMATIC" operating mode is active. The push-
buttons " + ", " - ", "GCB ON", "GCB OFF", "MCB ON" and "MCB OFF" (for op-
eration mode MANUAL) and the start / stop push-buttons are de-activated.
