Eaton PFDM-32/0.03/4/B-K 32A 30mA 4P B
- Eaton PFDM-32/0.03/4/B-K type B residual current circuit breaker for protection of people and installations against leakage currents; rated current 32 A, sensitivity 30 mA, 4 poles, DIN rail mounting.
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Eaton PFDM-32/0,03/4/B-K - residual current circuit breaker B-characteristic, 32 A, 30 mA, 4-pole
Eaton PFDM-32/0,03/4/B-K residual current circuit breaker is a protective apparatus designed to reliably protect people and installations from the effects of leakage currents, especially in systems with converters and drives. The device provides high sensitivity, a wide range of detection of differential currents and resistance to disturbances occurring in modern electrical installations.
- Rated current In: 32 A, differential current IΔn: 30 mA, 4 poles
- Type B characteristics - detection of AC, pulsating DC and smoothed DC differential currents
- Designed for applications with inverters, drives, PV installations and EV chargers
- High resistance to surge currents and mains interference, suitable for harsh environments
- DIN rail mountable, compact modular design
- Meeting the requirements of safety standards for type B residual current devices
Application and protective functions
The Eaton PFDM-32/0.03/4/B-K residual current circuit breaker is designed to protect people from electric shock and to protect installations from the effects of prolonged leakage currents, which can cause overheating of conductors and risk of fire. Type B provides detection of differential currents with sinusoidal AC, pulsating DC and smoothed DC waveforms, as well as currents with frequencies higher than the mains frequency, which is important in circuits with frequency converters, motor drives, photovoltaic installations and electric vehicle charging stations.
The device is suitable for use in three-phase installations with a neutral conductor and in low-voltage switchgear in residential, commercial and industrial facilities where increased protection against leakage currents with complex shapes is required. The rated differential current of 30 mA provides additional protection in accordance with the requirements of standards for socket outlet circuits and terminal circuits exposed to direct and indirect contact.
Construction and installation
The PFDM-32/0.03/4/B-K has a modular design suitable for mounting on a standard DIN rail in low-voltage switchgear. Four poles allow full disconnection of all phase wires and the neutral track, which increases the level of safety in three-phase installations. The apparatus is equipped with an on/off lever and a tripping mechanism responding to differential currents above the rated value.
The design of the apparatus provides for use in systems with a high level of electromagnetic interference and transient leakage currents, while maintaining resistance to short-term surge currents. Appropriately selected connection terminals allow secure and safe connection of installation wires with cross-sections approved by the manufacturer. Markings on the enclosure facilitate proper installation and identification of rated parameters in the switchgear.
Safety and compliance with standards
The Type B residual current circuit breaker of the PFDM series meets the requirements of the relevant product standards for residual current devices used in low-voltage installations. The use of Type B is required wherever smoothed DC currents may occur as a result of the operation of power converters, which could interfere with the operation of standard AC or A-type residual current circuit breakers. Thus, the PFDM-32/0.03/4/B-K ensures proper tripping of protection in conditions where other types of RCDs might not provide full protection.
Proper coordination of electrical parameters, such as rated current, differential sensitivity and switching capacity, allows safe integration with other Eaton modular apparatuses in switchgear. The use of this circuit breaker in critical circuits with power electronics increases the level of safety for users, reduces the risk of damage to the installation, and helps meet the requirements of electric shock and fire protection regulations.
| Parameter | PFDM-32/0.03/4/B-K |
|---|---|
| Series | PFDM |
| Device type | Residual current device (RCD), type B |
| Rated current In | 32 A |
| Rated residual current IΔn | 30 mA |
| Number of poles | 4 |
| Type characteristics | B - detection of AC, pulsating DC and smoothed DC differential currents |
| Application | Installations with frequency converters, drives, PV, EV chargers and power electronics |
| Protection function | Protection against electric shock and the effects of leakage currents |
| Mounting | On a DIN rail in low-voltage switchboards |
| Network configuration | Three-phase installations with neutral conductor |
| Type of detected current | Sinusoidal AC differential currents, pulsed DC, smoothed DC, higher frequencies |
| Additional protection | Yes, at IΔn = 30 mA |
| Areas of application | Residential buildings, commercial and industrial facilities |
| Interference immunity | Adapted for operation in environments with increased levels of interference and surge currents |
| Cable disconnection | Disconnection of three phases and neutral conductor |
| Design | Compact, modular enclosure for switchgear |
The Eaton PFDM-32/0.03/4/B-K residual current circuit breaker provides a specialized protection solution for circuits with modern power electronics where complex leakage current waveforms are present. The use of type B apparatus in key installation circuits increases the safety of users and helps meet the requirements of current standards and regulations.
FAQ (customer)
- What is the main purpose of the PFDM‑32/0,03/4/B‑K device? It is a residual current circuit breaker designed to protect peopLe and installations against electric shock and damage caused by leakage currents.
- Why do I need a type B RCD instead of a standard type AC or A? Type B RCDs detect smooth DC and compLex leakage currents that can appear in circuits with frequency inverters, EV chargers or PV inverters, where types AC or A might not trip reliably.
- Can I use this breaker in a residential installation? Yes, it can be used in residential buildings, especially where EV chargers, PV systems or other power electronics are installed and type B protection is required by regulations or manufacturer instructions.
- Is 30 mA sensitivity suitable for personal protection? Yes, 30 mA residual current rating is intended for additional protection against electric shock and is commonly used in final circuits accessible to users.
- Does this device switch off the neutral conductor as well? Yes, as a 4‑pole device it is designed to disconnect all phase conductors and the neutral in three‑phase systems with a neutral conductor.
- Can I mount it in a standard DIN‑rail distribution board? Yes, the device has a modular design for installation on a standard DIN rail in low‑voltage distribution boards.
FAQ (expert)
- In which appLications is the PFDM‑32/0,03/4/B‑K mandatory from a standards perspective? It is typically required where smooth DC residual currents above 6 mA may occur, such as with certain EV charging equipment, PV inverters or variable speed drives, in line with IEC/EN standards and national wiring rules.
- How does the type B sensing principLe cope with high‑frequency leakage currents? The internal detection system is designed to respond to residual currents over a broad frequency range, ensuring reliable tripping even in installations with power electronic switching harmonics.
- Can this RCD be used as a main incoming protective device in an industrial panel? It can, provided its rated current, breaking capacity and coordination with upstream protection are verified, and that the type B characteristic is suitable for the connected loads.
- Is selectivity with upstream or downstream RCDs achievable? Selectivity can be achieved only if devices are properly graded by type, residual current rating and time delay; for full details, Eaton coordination guides should be consulted.
- Are there any limitations when used with surge protective devices (SPDs)? When installed with SPDs, care must be taken regarding impulse current withstand; generally, a type B RCD offers improved immunity, but system design must ensure that surge currents do not cause unwanted tripping.
- What network configurations are supported? The device is intended for three‑phase systems with a neutral conductor in low‑voltage networks, with correct earthing arrangements according to local wiring rules.
Reviews
- Reliable RCD that works flawlessly in an installation with several frequency inverters.
- We used this device in an EV charging project and it met all technical and legal requirements.
- Compact modular design made it easy to integrate into an existing distribution board.
- Not the cheapest solution, but the type B protection gives peace of mind in compLex installations.
- Clear labelling and straightforward wiring helped reduce installation time.
- Good immunity to nuisance tripping, even with multipLe power suppLies and converters on the same bus.
- Ideal as a dedicated protection device for PV string inverters in our commercial building.
- After several months of operation in an industrial environment, no false trips or issues have been observed.
- Technical documentation is detailed enough for design engineers and panel builders.
- Recommended when upgrading older boards to compLy with current standards for EV and PV systems.