Modular bell transformer LDT120
Modular bell transformer LDT120 is a device that transfers electrical energy from one circuit to another through inductively coupled wires.
Power supplies for SELV circuits in domestic, tertiary and industrial applications are powered by transformers, ensuring isolation between circuits and protecting end users from accidental contact. They are mounted on a DIN rail and can be integrated into consumer units for discontinuous and continuous applications.
1. OPERATING PRINCIPLE
A. Modular bell transformer is designed to use in combination with loadsthat require a discontinuous supply at safety extremely-low
The most common application is providing a protection for door bells and bathroom buzzers in residential environments.
Install on DIN-Rail, they can be intergrated in consumer units and be used for discontinuous and continuous applications.
B. Modular bell transformer : safety isolating transformer with secondary voltage not permanently exceeding 24V and for a non permanenusing.
Power to 4V-8V-12V or 24V access control devices such as:
– door release
arrier – optical/electricalb – …
– flood detector
– temperature risedetector.
2. GENERAL CHARACTERISTICS
Single phase: 50/60 Hz
Input voltage: 230 V
Protected against involuntary or accidental contact with live parts xxB
Class II under faceplate in distribution board
AC primary and secondary voltages
2.1 Standards and Conformities
Safety Isolating transformer IEC 61558-2-6 agrement
Bell transformer IEC 61558-2-8 agrement
2.2 Protection of transformers
Protected against overloads and short-circuits by built-in PTC (Positive
coefficient of temperature) into primary winding.
In the event of an overload, switch off power supply and allow the
transformer to cool down before switching on again.
3.1 Modular bell transformer
Primary 230 V,secondary 4V-8V-12 V / 0-8-12-24V/16 V.
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