Armstrong 4300 - Technical Specifications and Advanced Functions; Integrated Controls and Specs

installation &
operating instructions
Design Envelope 4300 and 4380 vertical in-line
pumping unit with integrated controls
33
10.0 integrated controls
10.1 enclosure rating
The standard enclosure rating for Design Envelope
4300 and 4380 integrated controls is iec ip55. If the
pump is to be installed in a wet or dusty environ-
ment then a higher enclosure rating may be required
(contact Armstrong)
10.2 ambient temperature
To avoid the inverter unit getting overheated, the
ambient temperature is not to exceed 133°f (45°c).
Operating in higher ambient temperatures will re-
quire derating of the inverter.
11.0 electrical installation
All electrical connections should b e carried out by
a qualified and authorized electrician in accordance
with local site regulation s and the lates t issue of the
iee regulations.
safety, risk of death
Before removing the controls cover, the system
must be disconnected from the mains supply. After
switching o, wait for at least 15 minutes for the
capacitors to discharge before opening the cover.
caution
High voltage testing (Megging) of the motor/ con-
trols may cause damage to the electronic compo-
nents and therefore should not be carried out
11.1 ground leakage current
Ground leakage current is primarily caused by the
capacitance between motor phases and the motor
frame. The rfi filter contributes additional leakage
current, as the filter circuit is connected to ground
through capacitors.
The size of the leakag e current to th e ground depe nds on 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 Design Envelope pump if (by
mistake) the on-board inverter has not been grounded.
Since the leakage current is >3.5ma (approx
4-20ma), reinforced grounding 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con-
tent (dc) in the fault current (three-phase bridge rectifier)
•Suitableforpower-upwithshortchargingcurrent
to ground
•Suitableforahighleakagecurrent
11.2 start / stop of pump
The number of starts/stops via the mains voltage must not
exceed one-time per minute.
If a higher number of starts/stops is required then the start/
stop digital input must be used (mains voltage directly con-
nected). This is the preferred method of starting and stop-
ping Design Envelope pumps.
The three phase mains must be isolated before performing
maintenance of the pump.
11.3 additional motor protection
With the exception of supply fuses / mcb’s to
protect the installation (for over-current and
short-circuit protection), no additional overload or
over-temperature protection is required (i.e. thermal
overloads). Protection features include:
•Mainsphaseloss
•Overvoltage
•Undervoltage
•Electronicthermalmotorprotection
•Shortcircuitonmotorterminals
•Groundfaultonmotorterminals
•Overtemperature
11.4 supply voltage
The supply voltage details can be found on the inverter
nameplate. Please ensure that the unit is suitable for the
electrical supply on which it is to be used. The mains supply
for Design Envelope pumps is as follows:
3 × 380-480v +/- 10%
Supply frequency - 50hz