FHF Ex Howl-Call Telephones are robust and durable sound-powered ATEX phones with a highly efficient dynamic transmitter and receiver capsules offering communication without the need for a power supply (battery free also)…
FHF Ex Howl-Call Telephones are robust and durable sound-powered ATEX phones with a highly efficient dynamic transmitter and receiver capsules offering communication without the need for a power supply (battery free also) – ATEX Certified phones for safe hazardous area communications in Zone 1 hazardous area locations.
The FHF Ex Howl-Call ATEX telephone is ideal for use in hazardous and extreme environments, including areas with explosive atmospheres and fire-damp, such as mining, tunnelling, blast furnaces, offshore oil rigs and high-sea steamers.
The range of the Ex Howl-Call telephones is roughly 10km and a call signal is generated by turning the rotary knob containing an audio frequency dynamo.
All FHF ATEX phones have a sturdy, impact-resistant and weatherproof housing.
Dynamic receiver capsules for powerless telephony
Establishing a dynamic telephone system requires two capsules that must be connected via a two-wire cable no electric voltage supply is required. Used as a microphone, the dynamic capsule generates a relatively high voltage from a low sound pressure – high enough to generate a sufficient sound pressure for the other capsule used as receiver. The two capsules are interchangeable and can both be used as microphone or receiver.
All FHF handsets and ATEX telephone systems are explosion-proof and equipped with a high-volume howl capsule, so that they even meet the requirements for the rough and noisy conditions in underground applications. Intrinsically safe telephony by FHF – for more independence and safety.
FHF
FHF is part of the Hazardous Area Communication (HAC) group belonging to Eaton who own MEDC. MEDC has been added to the EATON hazardous area communications business unit to which FHF have a complimentary range of hazardous area signalling and ATEX phones.
Complete range of LV-HV Cable Joints, Terminations, Cleats & Glands are available to support installation of power, control and instrumentation cables up to 33kV – includes Cold Shrink for use in hazardous areas to provide electrical insulation and cable protection.
Thermon | EXHEAT | Abtech | Marechal Electric | 3M Electrical
| Category | ATEX Phones, Telephones & Tablets |
|---|
| Hazardous Area ATEX Certification – Zone 1 | ||
| Hazardous area protection type | I M1 Ex ia I MaII 1G Ex ia IIC T6 Ga | |
| Approval | Hand telephone 5069 – DMT 02 ATEX E 009 Wall-mounted telephone 5220 – BVS 03 ATEX E 433 | |
| Specifications | ||
| Telephone Housing | Polyamide | |
| Colour | Black | |
| Ingress protection | IP 54 according to IEC 60529 | |
| Product | Hand telephone 5069 | Wall mounted telephone 5220 |
| Output voltage | Max. 10 V | Max. 9,5 V |
| Current | Max. 155 mA | Max. 95 mA |
| Ringing frequency | Approx. 1540 Hz | Max. 3000 Hz |
| Operating position | Any | vertical, cable glands facing downward |
| Dimensions ( H x W x d) | Approx. 70 x 120 x 370 mm | Approx. 380 x 180 x 140 mm (with micro telephone) |
| Weight | Approx. 1 kg | Approx. 2.5 kg |
| Operating conditions | suitable for application in fired amp-endangered underground areas | |
| Operation mode | Continuous operation | |
| Temperature range | Operation -20 °C to +40 °C Storage -25 °C to +70 °C | |
| Type 5220 – Intrinsically safe wall-mounted telephone with howl call generator | Type 5069 – Telephone with howl call generator | Type 5077 – Prick pincer | Type 5564 – Wall socket |
| FHF Ex Howl-Call Part Number | Designation | MEDC Model | Connected to |
| MEDC FHF 113 262 01 | Ex hand telephone | w/o snap-in plug | – |
| MEDC FHF 113 270 01 | Ex hand telephone | with snap-in plug | coupling socket/wall socket |
| MEDC FHF 113 270 02 | Ex hand telephone | with prick pincer | flat-band cable |
| MEDC FHF 113 271 01 | Ex wall mounted telephone | w/o amplifier | fixed cabling or hose line |
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