20
Table 2 shows theoretical value of each characteristic with time multiplier set to 1.000.
Record the actual results in Table 3 and check that the measured times are within
±
5% or
±
30-m.secs.of theoretical value.
CURVE
2 x Is
5 x Is
10 x Is
20 x Is
SI 3
10.03
4.28
2.97
2.27
SI 1
4.39
1.87
1.3
1.0
EI
26.67
3.33
0.81
0.20
VI
13.50
3.38
1.50
0.71
LTI
120.00
30.0
13.33
6.32
DTL
*
* * *
TABLE 2
* USER SETTING
2 x Is
5 x Is
10 x Is
20 x Is
Pole
Characteristic
(SI3,SI1,EI,
VI LTI,DTL)
Delay
Error
(
±
5%)
Delay
Error
(
±
5%)
Delay
Error
(
±
5%)
Delay
Error
(
±
5%)
LOWSET
TABLE 3
5.2.3. O
UTPUT CONTACTS COMBINATION
a)
Starter - C/O
This contact is to be used while testing the pick up and reset value of the relay.
b)
Common Trip & Alarm for E/F and LOW SET – 2 N/O contacts
These contacts to be used while testing the E/F & LOWSET characteristics.
c)
E/F – 1 N/O contact
This contact to be used while testing the E/F characteristic.
