User Manual

GMC-I Messtechnik GmbH 63
14.10 Test Sequences for Report Generation of Fault Simulations
on PRCDs with PROFITEST PRCD
Adapter (MXTRA only)
The following functions can be performed when the
PROFITEST MXTRA test instrument is connected with the PROFITEST
PRCD test adapter:
• Three test sequences are preconfigured:
– PRCD-S (single phase/3-pole)
– PRCD-K (single phase/3-pole)
– PRCD-S (three-phase/5-pole)
• The test instrument guides you through all test steps in a
semi-automatic fashion:
Single phase PRCDs:
– PRCD-S: 11 test steps
– PRCD-K: 4 test steps
3-phase PRCDs:
– PRCD-S: 18 test steps
• Each test step is assessed and evaluated by the user (OK/not
OK) for subsequent report generation purposes.
• Measurement of protective conductor resistance of the PRCD
by means of function R
LO
at the test instrument. Please note
that the protective conductor measurement represents a
modified RLO measurement with ramp curve for PRCDs, see
section 12.
• Measurement of insulation resistance of the PRCD by means
of function R
INS
at the test instrument, see section 11.
• Trip test with nominal fault current by means of function I
F
at the test instrument, see section 7.3.
• Measurement of tripping time by means of function I
ΔN
at the
test instrument, see section 7.3.
• Varistor test with PRCD-K: measurement via ISO ramp, see
section 11.
Attention!
!
It is imperative that you read the operating instructions
for PROFITEST PRCD before connecting the
PROFITEST MXTRA with the PRCD adapter.
14.10.1 Selecting the PRCD under Test
14.10.2 Parameter Settings
Meaning of Symbols for the Respective Fault Simulation
Parameter PRCD-S single phase – 11 parameters = 11 test steps
Together with the required intermediate steps for PRCD activation
(=ON), the parameters for the fault simulations represent die 11
potential test steps:
Interruption (BREAK...), conductor exchange (L1 <-> PE),
PE to phase (Uext -> PE), contacting of key ON, protective con-
ductor current measurement (Figure on the right: PRCD-Ip) .
Parameter PRCD-S 3-phase – 18 parameters = 18 test steps
Parameter PRCD-K single phase – 5 parameters = 5 test steps
Switch
Position
PROFIT-
EST PRCD
Symbols shown at
PROFITEST MXTRA
Meaning of Symbols
Parameter
Setting
Menu
Display
ON 1~ON
Activate single phase PRCD
ON 3~ON
Activate 3-phase PRCD
BREAK Lx
Disconnection of conductor
Lx <-> PE
Lx <-> N
Conductor exchange between
phase conductor and PE or
neutral conductor
PE-U
EXT
Uext -> PE
PE to phase
PROBE
Contact key ON at PRCD with
probe
PRCD-Ip
Protective conductor current
measurement with current
clamp transformer
—AUTOAUTO
Semi-automatic changing of
fault simulations