TILLQUIST LQT40A, Руководство пользователя

Страница: 4 / 17

1
1 Instructions
1.1 Purpose of this document
This document describes how to use the LQT40A multi transducer. The user manual is intended to be
used by:
• installation personnel and commissioning engineers
• service and maintenance personnel
• planners
1.2 Mounting
The transducer can be mounted on a 35 mm DIN rail according EN50022, on a wall or device cabinet
for suitable protection. The enclosure shall not be accessible without tools.
1.3 Installation
The installation shall be made by trained personnel and in accordance with applicable regulations.
Before the installation, please check that the transducer is the correct type and complies with the
installation needs.
A marked external circuit breaker to turn off the power supply to the
transducer must be installed near. The OFF-position shall be clearly
marked.
Attention: Danger to life! Ensure that all leads are free of potential when
connection them!
Voltage measurements inputs must have circuit breakers or fuses rated 5
Amps or less.
The measuring circuits from the current transformers must be short-
circuited before disconnection. No fuses are allowed on the current inputs.
1.4 Operation
The transducer is intended for operation at an altitude not exceeding 2000 m and in an environment
that is not considered as wet location.
Operation temperature: - 20…22…24…+55°C
Proper function is only guaranteed if the USB is not connected to the transducer and all the
instructions in this manual are followed for safety reasons.
1.5 Safety
All inputs and outputs are galvanically isolated from each other.
Protection class: II, protective insulation, voltage inputs via protective
impedance.
Protection: IP40 (housing), IP20 (terminals)