Three-phase fan speed regulators | Breve - manufacturer of transformers

A3RM

Administrator Breve — Sat, 08 Aug 2020 13:51:26 +0000

Autotransformer regulators (two transformers in V-connection) serve the purpose of airflow control, fitted in ventilation and heating systems. The transformers are made with Class I insulation and protection grade IP00 (for IP21 protection, please find out more about A3RW type). Maximum ambient temperature 40°C, thermal class of insulation B (130°C). Manufactured in compliance with EN 61558-2-13.

Rated current SEC: 1,5 – 14A
Rated voltage PRI: 3x400V 50/60Hz
Rated voltage SEC: 5-step regulation (400; 280; 230; 180; 130 V)

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The post A3RM first appeared on Breve - manufacturer of transformers.

A3RW

Administrator Breve — Fri, 07 Aug 2020 13:48:21 +0000

Autotransformer regulators serve the purpose of airflow control, fitted in three-phase ventilation and heating systems. The transformers are made with protectiongrade IP21, and equipped with indicator light. Maximum ambient temperature 25°C. Thermal class of insulation B (130°C). Manufactured in compliance with EN 61558-2-13.

Rated current SEC: 1,5 – 14A
Rated voltage PRI: 3x400V 50/60Hz
Rated voltage SEC: 5-step regulation

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The post A3RW first appeared on Breve - manufacturer of transformers.

ARWD / A3RWD

Administrator Breve — Thu, 06 Aug 2020 08:55:57 +0000

ARWD is a single-phase autotransformer fan speed regulator whereas A3RWD is a three-phase autotransformer fan speed regulator. Both are applicable to voltage-controllable motors (230 V, 50/60 Hz) to control the rotational speed of fans and ventilation systems. Regulators are equipped with two indicators – the green one shows when the regulator is on while the red one shows when the TK contact is on. For better protection of the regulators, we suggest using overcurrent protection.

These controllers make it possible to select two optimal motor speeds and to switch these with a contact. Important energy savings and an increase of comfort can be achieved, for example by day and night control. Regulators are fitted with TK contacts for thermal motor protection and run/stop contacts (CC-closed/OC-open) for external or remote starting and stopping.

The transformers are made with Class II insulation and protection grade IP21 (A3RWD, ARWD 14) or IP54 (ARWD 1,5 – 10), maximum ambient temperature 40°C (ARWD) and 25°C (A3RWD), thermal class of insulation B (130°C). Manufactured in compliance with EN 61558-2-13.

Rated current SEC: 1,5 – 14 A
Rated voltage PRI: 230V 50/60Hz or 3x400V 50/60Hz
Rated voltage SEC: 5-step regulation

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The post ARWD / A3RWD first appeared on Breve - manufacturer of transformers.

A3RWE

Administrator Breve — Mon, 25 Jan 2016 15:02:03 +0000

A3RWE is an autotransformer fan speed controller dedicated for three-phase AC motor in ventilation and heating systems. The controller provides a 5-step output voltage regulation due to 0-10V DC input signal. Full opto-insulation between output voltage and control signal is provided by power electronics PCB module.

The state of three sensor inlets (shorted or unshorted) defines actual device working mode: non-potential contacts state, unregulated 230V AC (max 1A) output state and regulated output for motor cutout (motor thermal overheating protection). Additional option is an unregulated 230V AC (max 1A) voltage output not relayed with sensors state.

The actual output voltage level (autotransformer tap) and other messages are presented on LED display on users panel. Power switch-on state and input sensors state (alarm if unshorted) are sygnalised by as follows green and red indicator lapms. Maximum ambient temperature 25°C. Thermal class of insulation B (130°C). Produced with IP21 protectiongrade. Manufactured in compliance with EN 61558-2-13.

Power supply: 3x400V AC 50Hz
Output current: 4A, 5A, 7A, 10A
Control: autamatic control by 0-10V DC or 0-20mA signal

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