HT EASYTEST - Page 55

EASYTEST-COMBI519
EN - 55
TT
TN
IT
Mode
Condition x OK outcome
Condition x OK outcome
Condition x OK outcome
L-L
STD
No outcome
No outcome
No outcome
Br.Cap
Isc L-L max < BC
Isc L-L max < BC
Isc L-L max < BC
TripT
(IscL-Lmin 2P) →Tmax → Tmax < Tlim
(IscL-L min 2P) →Tmax →Tmax < Tlim
(IscL-Lmin 2F) →Tmax → Tmax <
Tlim
Ut
L-N
STD
No outcome
No outcome
No outcome
Br.Cap
Isc L-N max < BC
Isc L-N max < BC
Isc L-N max < BC
TripT
(Isc L-N min ) →Tmax → Tmax < Tlim
(Isc L-N min ) →Tmax → Tmax < Tlim
(Isc L-N min ) →Tmax → Tmax < Tlim
Ut
L-PE
STD
No outcome
Br.Cap
Isc L-PE max< BC
TripT
(Ipfc L-PE min ) →Tmax → Tmax <
Tlim
Ut
ZL-PE < ZLimit (UK)
Utmeas < Utlim
Ra
Ut
2W
Utlim/Ra meas = Isc L-PE MIN > Idn
(RCD)
ZLPEmeas < ZLIM (Table UK)
ZLPEmeas < ZLIM (Table UK)
Ra meas x Idn < Ut lim (other Nations)
Ut
3W
ZLPEmeas < ZLIM (Table UK)
ZLPEmeas < ZLIM (Table UK)
Ra meas x Idn < Ut lim (other Nations)
Table 2: Conditions of positive outcome depending on the test parameters
Where:
Empty cells
Mode unavailablefor this particular combination of electric system
Isc L-L_Min2P
Prospective short-circuit current minimum two-phase Phase-Phase
Isc L-N_Max
Prospective short-circuit current maximum Phase-Neutral
Isc L-N_Min
Prospective short-circuit current minimum Phase-Neutral
Isc L-PE_Max
Prospective short-circuit current maximum Phase-PE
Isc L-PE_Min
Prospective short-circuit current minimum Phase-PE
BC
Breaking Capacity of the protection device - kA
Z Limit
Max allowed limit impedance according to type of protection
Tmax
Maximum trip-out time of the protection device
Tlim
Limit time of fault extinction by the protection set by the user
Ut meas
Contact voltage measured
Ut lim
Contact voltage limit (25V or 50V)
Ra meas
Overall earth resistance measured
Idn
Tripout current of RCD devices
Ipsc
Prospective short-circuit current
Ipfc
Prospective fault current