PTE-300-V
Sheet 7
d) EXTERNAL REFERENCES INPUT
Can be synchronized, in terms of frequency and phase with any external signal,
from 0.1 to 25 A
in current, and
from 5 to 300 V
in voltage.
e) SIGNAL MONITOR
The unit has a
Signal Monitor
input that can work with dry contacts or with voltage signals from 5
to 250 V ac or dc.
f) RS-232 COM PORT
Used to control the equipment from an external computer, can be used to perform the following:
•
Software calibration.
•
Automatic testing.
•
Direct printing of the test results in a RS-232 input printer.
g) PTE BUS
Allows the interconnection with any other unit of the PTE RANGE.
h) EXTERNAL TIMER CONTROL OUTPUT
Delivers a pulse signal, dry contact type, of 20 ms duration. This can be used to start an external
timer, for timing measurements. This signal is produced every time one of the power outputs
changes its status, or the
Step
key is activated in amplitude or in phase.
i) OUTPUT PROTECTION
The outputs and, in general, the unit, are electronically protected against overload, short-circuit
and over temperature. These alarms are indicated on the
Front Panel
.
Standard 5 x 20 mm fuses protect the rest of inputs and general devices included in the unit.
1.2.
APPLICATIONS
a) AS STAND ALONE TESTING UNIT
•
Frequency relays.
•
Load sharing relays.
•
Synchronizing relays.
•
Multifunction generator protection relays.
•
Harmonics relays.
•
Overcurrent relays (up to 24 A).
•
Inverse time overcurrent relays.
•
Definite time overcurrent relays.
•
Earth and neutral (including harmonics filtering).
•
Voltage controlled relays.
•
Directional relays.