Thytronic XMR-V 4V User Manual

FUNCTION CHARACTERISTICS
219
— Minimum power factor - 55
Preface
Two independent time adjustable thresholds with lag, lead or lag/lead programmable power factor.
For each elements can a consensus for start / trip operation may be set only if the circuit breaker is
closed and after an adjustable enabling time, the closure (tARM-cosphi<) .
Operation and settings
The power factor is computed:
± cos
f = ± P / S
where:
• P is the total active power: ± P = U
L1
· I
L1
· cos f
L1
+ U
L2
· I
L2
· cos f
L2
+ U
L3
· I
L3
· cos f
L3
• S is the total apparent power: S = √P
2
+ Q
2
The lag power factor (cos f = P/S with Q ≥ 0) and the lead power factor are compared with the setting
value (cos
f
lag
<, cos f
lead
<).
-Q
ϕ
lag
π/2
π
−π/2−π
cosϕ
ϕ
lead
CPhi1<def CPhi1<def
NO TRIP NO TRIP
TRIP TRIP
+Q
+P
-P
TRIP
CPhi1<def
CPhi1<def
TRIP
TRIPTRIP
NO TRIP
NO TRIP
Tripping direction setting: CosPhi Lag/Lead
General operation characteristic for the out of step element - 55
-Q
ϕ
lag
π/2
π
−π/2−π
cosϕ
ϕ
lead
CPhi1<def
NO TRIP
TRIP
+Q
+P-P
TRIP
CPhi1<def
TRIP
NO TRIP
NO TRIPNO TRIP
Tripping direction setting: CosPhi Lag
General operation characteristic for the out of step element - 55
-Q
ϕ
lag
π/2
π
−π/2−π
cosϕ
ϕ
lead
CPhi1<def
NO TRIP
TRIP
+Q
+P-P
CPhi1<def
TRIPTRIP
NO TRIP
NO TRIP
NO TRIP
Tripping direction setting: CosPhi Lead
General operation characteristic for the out of step element - 55
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021

Thytronic XMR-V 4V Specifications

General

Brand	Thytronic
Model	XMR-V 4V
Category	Protection Device
Language	English