HT instruments FULLTEST3 - Manual (Page 34)

FULLTEST 3
EN - 33
5.6. LOOP IMPEDANCE / SHORT-CIRCUIT CURRENT (LOOP)
• According to EN 60204-1, the conditions for protection against electric shock in installations with
automatic disconnection of mains voltage are:
• Measurement or evaluation of fault loop impedance and testing the over-current protection device
involved in the fault loop.
• Limit values are shown in the Table 10 of EN 60204-1.
5.6.1. LOOP DISPLAY EXPLANATION
Adjustable/selectable parameters:
MODE - measurement mode
LOOP L/N , LOOP L/L , LOOP L/PE , IMP57 L/N , IMP57 L/L or IMP57 L/PE
LIMIT - limit value mode STD, kA, I 2 t, TRIP CURR. or Ut, see the explanation below
Ib – breaking capacity of protection 1, 1.5, 3, 4.5, 6, 10, 15, 16, 20 or 25 kA
PROTECTION - type of protection MCB B, MCB C, MCB D, MCB K, FUSE gG or FUSE aM
In - nominal current of protection
See the values in chapter “LIMIT VALUE EXPLANATION” below
Tset - max allowed tripping time 0.1 s, 0.2 s, 0.4 s or 5 s
WIRE - wire material Cu (Copper) or Al (Aluminium)
COATING - wire coating PVC, BUTYL RUBBER or EPR/XLPE
SECTION - wire section 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50 or 70 mm 2
N - number of conductors 1  99
Figure 22 : Display with LOOP L/N test result
1 ..... Selected function.
2 ..... Selected nominal voltage (230 or 240 V) needed for calculation of short-circuit current.
3 ..... READY message. It is displayed when present mains voltage U L/L , U L/N or U L/PE within required
range is present.
4 ..... Sub-results - mains voltage U L/PE or U L/PE or U L/L at which the measurement has been done and
calculated prospective short-circuit current I SC .
5 ..... Measurement screen touch-screen key.
6 ..... MODE touch-screen key to select measurement mode (LOOP L/N, LOOP L/L, LOOP L/PE, IMP57
L/N, IMP57 L/L or IMP57 L/PE). Currently selected mode is displayed on the bottom of the key.
7 ..... LIMIT touch-screen key to select limit mode (STD, kA, I 2 t, TRIP CURR. or Ut). Currently selected
mode is displayed on the bottom of the key.
8 ..... PROT. (protection) touch-screen key to select the type of protection (MCB B, MCB C, MCB D,
MCB K, FUSE gG or FUSE aM) and nominal current of selected protection. Currently selected type
is displayed on the bottom of the key.