Poznámky redaktora
85 0.525 0.65 0. 0,3 .675 0,7 0.05 and 1.4 0..975 In
t1 72
108 144 <1>
@ I1
Release between
1.5 3.5 In
Where I2
t2 0..
34/158
.12..2 0.575 0.775 0.
(2) These tolerances apply the following conditions:
- self-powered relay full power (without start-up)
- presence auxiliary power supply
- two-phase three-phase power supply
- trip time setting >100ms
For all cases not covered the above hypotheses, the following tolerances apply:
Protections Trip threshold Trip time
L Release between 1.45 0.425 0.1 0.5 9.925 0.55 0.5 2.5 0..6 0.8 s
± Inq
± 10% In
q
The best the two data:
± 10% ms
(1) The minimum value this trip regardless the type curve set
(self-protection).4 0.725 0.875 -
0.3 0.2.2.6
0.7 0..8 0.2 10% Inq
± 20% In
q
S
(t= k)
H 1.825 0.25 20%
S 10% 20%
I 15% 60ms
G 10% 20%
Others 20%
12.8 Table measurements
Type measurement
Range values measured the relay
Standard operation range
Range Tolerance %
Phase and neutral current 0,05 . 0,3 . 1,5
Earth fault current 0,05 ..625 -
0.5 -
6 8.7 Summary table protections
Protection
Disabling
Trip threshold Trip tim e
T rip
th ld
tolerance (2)
T rip
tim e
tolerance (2)
L
(t= k/I2) □
I1 0.9 0.5 -
0.75 -
0... 1,5
Model 2234 Apparatus Scale
L 2778
Doc No- 2
Page No.05 and 1.475 0
