Earth Leakage Current; Additional Motor Protection; Supply Voltage; Tools For Installation - Armstrong Design Envelope 4302 Installation & Operating Instructions Manual

i nstall a ti o n &
op erati n g i nstr ucti on s
12
caution
High voltage testing (Megging) of the motor / inverter
may cause damage to the electronic components and
therefore should not be carried out.
5 .1 earth leak age current
Earth leakage current is primarily caused by the apaci-
tance between motor phases and the motor frame.
The rfi fi lter contributes additional leakage current, as
the fi lter circuit is connected to earth through capacitors.
The size of the leakage current to the ground depends of the
following factors, in order of priority:
1 Switching frequency
2 Motor grounded on site or not
The leakage current is of importance to safety during handling /
operation of the ivs Sensorless pump if (by mistake) the
on-board inverter has not been earthed.
at tention:
Since the leakage current is >3.5 mA (approx 4 -20 mA),
reinforced earthing must be established which is required if en
50178 is to be complied with. Never use elcb relays that are not
suitable for dc fault currents (type a).
If elcb relays are used, they must be:
• Suitable for protecting equipment with a direct current
content (dc) in the fault current (three-phase bridge rectifi er)
• Suitable for power-up with short charging current to earth
• Suitable for a high leakage current
5 . 2 earth leak age current
The number of starts / stops via the mains voltage must not
exceed one time per two mins.
If a higher number of starts / stops is required then the start
/ stop digital input must be used (mains voltage directly
connected). This is the preferred method of starting and
stopping ivs Sensorless Pumps.
The three phase mains must be isolated before
performing maintenance of the pump.
Design Envelope 4302 ivs and 4382 ivs vertical
in-line pumping unit with integrated controls

5 .3 additional motor protection

With the exception of supply fuses / mcb's to protect the
installation, no additional overload or over-temperature
protection is required. Motor / inverter protection includes:
• Mains phase loss
• Over voltage
• Under voltage
• Over current
• Short circuit
• Over temperature

5 . 4 supply voltage

The supply voltage details can be found on the motor
nameplate. Please ensure that the motor is suitable for the
electrical supply on which it is to be used. The mains supply
for ivs Sensorless pumps is as follows:
3 x 380/400/415/440/460/480v +/- 10% Supply
frequency - 50/60hz

5 .5 tools for installation

One cross point screwdriver, one Large screwdriver,
one Small screwdriver

5 .6 cable entry sizes

0.55kW - 4.0kW: 3 x m20 x 1.5
5.5kW - 7.5kW: 1 x m25 x 1.5, 2 x m20 x 1.5
One cable entry is factory fi tted with a plug kit for external
keypad connection.

5 .7 max. cable cross section

Mains cable supply: 4.0mm 2
Control cable: 1.5mm 2
Serial communication cable: 1.5mm 2