24
TB XRI1-IR 02.00 E
Current input
Terminals
Reference
voltage
Terminals
Display
S1/S2
L/N
Phase
I
P
I
Q
I1
1S1/1S2
U23
L2/L3
1.00 ±3%
+1.0 ±3% In
±0.0 ±3% In
I2
2S1/2S2
U31
L3/L1
1.00 ±3%
+1.0 ±3% In
±0.0 ±3% In
I3
3S1/3S2
U12
L1/L2
1.00 ±3%
+1.0 ±3% In
±0.0 ±3% In
Terminals N1, N2 and N3 are bridged.
Table 7.1: Connection of test currents and voltages and corresponding display values
For relay assignment:
Parameter
Relays
I> Alarm (V)
_2__
I> Alarm (R)
__3_
Parameter
Setting
I>
0.5 x In
tI> (V)
EXIT
tI> (R)
EXIT
Table 7.2: Necessary parameter setting and relay assignment
A test current of 1 x In is impressed upon the current
input. The voltage source is to be connected as provi-
ded for in Table 7.1. With an angle setting of 49
o
leading, relay 2 must respond and LED
→←
lights up
green. If the angle is now changed beyond the margi-
nal regions, the LED
→←
changes from green to red.
Relay 2 drops and relay 3 responds. This test must be
repeated for current inputs 12 and 13.
To check the trip delays for forward and backward di-
rection they have to be set differently, because there's
only one trip relay for both directions.
Great care must be taken to connect the test current
and test voltage to the relay in correct phase angle
and polarity. In Figure 7.1 the relay and test source
polarity are indicated by a * mark near the terminals.
The markings indicate that the relay will trip in its
maximum sensitive angle when the voltage drop from
the marked end to the non-marked end in the voltage
input circuit has 49° phase angle lagging the current
flowing from the marked end to the non-marked in the
current input circuit. Of course, regardless of polarity,
the current level must be above the pickup value.
