Nolta star-delta Operator's manual

EN
star-delta switching device
Manual and
Safety Instructions
11 8024/ 01.2022
Nolta GmbH Ph +49(0)6421/9859 0
Industriestr. 8 Fax [phone]
35091 Cölbe www.nolta.de
Germany [email protected]

General Information
Read this manual before installing and activating this product.
Respect all safety instructions and local laws and regulations.
The installation may only be executed by qualied electricians.
This product may only be used according to its intended use set forth in
this manual.
The following Symbols and hazard statements are used in this operating and assembly
instructions:
Hazard statements Notes
The hazard statements are structured in
the following way:
Danger
Indicates a hazardous situ-
ation which, if not avoided,
will result in death or serious
personal injury.
A blue or grey circle with
a white graphical symbol
indicates that an action must
be taken.
A red or grey circle with a
diagonal bar, possibly with a
black graphical symbol, indi-
cates that an action must not
be taken or must be stopped.
If these instructions are not
observed, it may result in
malfunction or damage to
the equipment.
Warning
Indicates a hazardous situ-
ation which, if not avoided,
could result in death or
serious personal injury.
Caution
Indicates a hazardous situ-
ation which, if not avoided,
could result in minor or
moderate personal injury.
Signal Word
Description of Hazard
Consequence of ignoring the warning.
Action to avoid the hazard.

Technical Data
Housing material: Polycarbonate
Protection class: IP 44
Length: 315 mm
Width: 145 mm
Height: 200 mm
Weight: approx. 2.7 kg
Supply voltage: 400 V, 50 Hz
Tolerance range: 6% - 10% of the rated voltageaccording to DIN
EN 60038 (VDE 0175)
Switching capacity: Star-delta start up to 15 kW
Ambient temperature: -15 °C to +40 °C
Supply: Connection cable with CEE plug 5-pole with
phase inverter
Motor side gland: PG29 (clamping range 14 - 25 mm)
Technical changes reserved
Table 1
Intended use
The NOLTA star-delta switching device is intended for use in industrial and commercial
areas in accordance with the EMC guidelines and taking interference emissions into
account. When using the device, the permissible ambient conditions according to the
specied IP protection class and the permissible temperature range must be observed.
Special provisions apply to EX zones, areas with an increased risk of re and under-
ground. Mechanical and electrical changes may only be carried out after consulting the
manufacturer and only by certied specialists. All changes to the device must meet the
safety requirements. The manufacturer assumes no liability for damage resulting from
improper use.

Warnings
DANGER
Death or serious personal injury
• The device may only be installed, serviced and commissioned by a
suitably trained specialist taking into account the local regulations
and technical regulations. The „5 safety rules“ must be observed
• Before any intervention or opening of the device, it must be swit-
ched off using the on / off switch, the power supply must be inter-
rupted by pulling the mains plug and secured against being switched
on again
• Maximum current rating must not be exceeded
Attention
• Set the tripping current of the motor protection switch to the rated
motor current
• The bimetals are interconnected in the switch so that they are in the
motor‘s phase circuit. This protects the motor winding in both the
star and the triangle position. A conversion is not necessary.
• Overcurrent and residual current protective devices must be provided
by the customer in order to ensure operation in accordance with
standards, the cable length between the protective devices and the
motor protection plug must not exceed 3m
Notes
• If a thermal contact is connected, the bridge at connections T1 and
T2 must be removed
• A neutral conductor (N) must be provided via the mains plug
• Wait at least 3 seconds before switching from star to delta operation
• Only connect suitable cables and observe the maximum cable length
• Do not use oils, greases or solvents, these substances impair the
stability of the plastic

Operation
• Wait at least 3 seconds before switching from star to delta operation.
• In the event of a pump failure due to overcurrent or winding temperature, set
the star-delta switch to „0“. After the temperature sensor (F2) or the overcurrent
release (F1) has cooled down, it can be switched on again. Attention: Eliminate the
cause of the fault
• Resetting after a motor fault: Set the switch back to „0“.
• The direction of rotation can be changed by pushing in and turning the pole pins
180 ° in the CEE plug.
Installation
Connection of the consumer according to the circuit diagram to terminals U1, V1, W1,
U2, V2, W2 and PE. The thermal contact of the connected consumer is installed on
terminals T1 and T2, the factory-mounted bridge must be removed for this.
Disposal
This product or parts of it must be disposed of in an environmentally sound way:
Use the public or private waste collection service. If this is not possible, please contact
your NOLTA dealer.

Tripping Chart
Notes

Circuit diagram
Nolta star-delta switching device
processed Technik
Datum
date
1
Änderung
0 76
checked
8 93 4
07.05.2021 Nolta GmbH
Industriestraße 8
35091 Cölbe
2 5
L1 L2 L3 NPE
phase inverter
(optional)
QS
thermal-
contact motor
F1
L1
W2
W1
V2
V1
U2
L3
U1
L2
0Y 
U <
D2
14
Y

0
T1 T2 PE
W2 U2V2
U1V1
W1
Attention!
Do not disconnect under
load!
feed
Overcurrent protection device in the supply
line according to DIN VDE 0113 Part 1 Section
7.2 required.

EU Declaration of Conformity
We hereby declare that the Nolta – Stern-Dreieck-Schaltgerät specified below will, due to its design and
construction, comply with the relevant regulations listed.
Product Designation Nolta – Stern-Dreieck-Schaltgerät
Manufacturer Nolta GmbH
Industriestr. 8
35091 Cölbe
EU directives / Harmonized standards /
national techn. Standards - Specifications
Low Voltage Directive 2014/35/EU
Restriction of use of certain hazardous substances in electrical and
electronic equipment (RoHS) – Directive 2011/65/EU & 2015/863/EU
Electromagnetic Compatibility Directive – Directive 2014/30/EU
EN 60204-1:2018
Safety of machinery – Electrical equipment of machines – Part 1:
General requirements
Authorized representative
Name and address
David Loechelt
Nolta GmbH
Industriestr. 8
35091 Cölbe
We confirm that a CE mark according to the European directives is affixed to the above mentioned
Nolta – Stern-Dreieck-Schaltgerät.
31.01.2022................................................ ................................................
Date CEO Head of Quality Management
Dr. Ing J. Knake D. Loechelt
CE-Zertifikat Nolta Stern-Dreieck-Schaltgerät EN Ver 2022-01.docx Ver 2022-01