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OPERATING INSTRUCTIONS
Switching Station US-12
INTRODUCTION
Dear customer,
Thank you very much for the trust you have placed in us. Please read these instructions for use
thoroughly and completely to familiarize yourself with the switching station prior to putting it into
operation.
DELIVERY CONTENT
• Switching station US-12
• Terminal for ground connection
• Manual
INTENDED USE
The switching station US-12 allows trouble-free operation of an inverter and 230 V AC mains in the
same circuit. The device switches automatically between inverter and 230 V AC mains and protects the
inverter against external voltage. In addition, it offers the possibility to choose the preferred source
of two different power sources (priority circuit). The product is designed for private use only and not
suitable for commercial use. Any other use than described before may damage this device. In addition,
improper use may result in serious hazards, such as short-circuiting, fire, electrical shock etc. The entire
product must not be modified or converted in any manner whatsoever!
Please observe all safety notes in these operating instructions!
SAFETY INSTRUCTIONS
The following safety notes and hazard warnings serve not only for the protection of the device but also
for the protection of your health. Please read the following points thoroughly.
In case of property damage or personal injuries caused by improper handling or non-observance of
these operating instructions or the safety notes stated herein, the warrant/guarantee will expire.
We assume no liability for any consequential damages!
General
• For safety and technical approval reasons (CE), the unauthorized conversion and/or modification of the
product is not permitted.
• This device is no toy and must not be used by children! Please ensure childproof operation of the
device at any time.
• Don't leave packaging material heedlessly. It could become a hazardous toy for children!
• Check the device and connection cables used on damages before starting operation. If you detect any
damages (e.g. transport damages) on the device, do not start operation. Damaged connection cables
must be replaced immediately.
• The device may only be operated in a dry environment. It may not get humid or wet, otherwise there
is a risk of life-threatening electrical shocks.
• The use of the product under unfavorable environmental conditions must be avoided under all circums-
tances. Unfavorable environmental conditions include: ambient temperatures above 50°C, flammable
gases, solvents, vapours, dust, relative humidity in excess of 80%, and moisture.
• Do not use the switching station US-12 near ignition sources, open fire or other heat sources (heating,
gas stoves or strong solar radiation).
• Service and repairs may only be carried out by authorized and qualified personnel. Use only original
spare parts for repair work. The use of any other spare parts may lead to serious damage to property
and personal injury!
6
Operation
• The switching station US-12 may only be connected to 230 V AC/50 Hz.
• Operate only inverters with safe electrical separation (galvanic separation) between input circuit
(battery voltage) and output circuit (230 V).
• Before installation ensure that the inverter output as well as 230 V AC mains supply are voltage free
and equipped with a safety lock system to prevent unintentional start of the device.
• Ensure that the connection cables are connected properly and have good contact, as loose contacts
may cause smoldering fire.
• Do not connect the neutral conductor on the consumer side to earth or protective earth conductor;
as the consumer sockets in particular have no protective multiple earthing (i.e. connection of
PEgrounding wire with the neutral connector).
• The cross sections of the used cables must be selected and secured in compliance with applicable law.
• It is not permissible to use the device for three-phase current.
INSTALLATION
The installation should only be carried out by persons having relevant professional skills. If there is any
doubt, always contact an authorized expert. Use the supplied clamps to connect the protective earth
conductor. If the inverter has no earth connection, the battery terminal which is connected to earth must
be connected to the protective earth conductor.
Attention! Before installation ensure that inverter output as well as 230 V AC mains
!
supply are voltage free and equipped with a safety lock system to prevent unintentional
start of the device.
Connection elements:
1
2
3
i
The AC2 input has the higher priority; i.e. when there is voltage at both inputs,
the consumer is fed over the AC2 input.
1
Input AC1: 230 V AC, 50 Hz, max. 12 A
2
Input AC2: 230 V AC, 50 Hz, max. 12 A
3
Fuse: T 15 A / 250 V
4
Output OUT: 230 V AC, 50 Hz, max. 12 A
4
7
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