Description
ABB E5LA HENF105296R0001 Tx Filter
Introduction to ABB E5LA HENF105296R0001 Tx Filter Electronic Release (including filtering function)
The ABB E5LA HENF105296R0001 Tx Filter is an electronic release specifically designed for ABB Emax E5 series air circuit breakers (ACBs). The suffix “Tx Filter” in the model indicates that this version has a built-in signal filtering module, specifically designed to suppress the impact of on-site electromagnetic interference on protection accuracy. It is a microprocessor based analog/digital hybrid overcurrent protection device known for its high reliability and deterministic action, and is still in service in a large number of switchgear worldwide.
ABB E5LA HENF105296R0001 Tx Filter
core positioning
The module itself is not an independent device and must be installed inside the ABB Emax E5 frame circuit breaker (such as E5S, E5H, etc.) to work. The circuit breaker provides the installation position and main current sampling signal uniformly. Its core function is “overcurrent protection+signal filtering” – real-time sampling of the main circuit current, clearing interference through built-in filters, determining whether to trigger a trip according to LSI three-stage logic, and reporting fault information through mechanical signs and auxiliary contacts. Unlike digital release devices such as PR121/P and PR122/P with communication functions, E5LA does not have remote communication capabilities and is positioned as the last line of defense for “pure protection, high reliability, and maintenance free”.
Basic Parameters
Material Number: HENF105296R0001
Model: E5LA
System: ABB Emax E5 Low Voltage Air Circuit Breaker
Protection function: LSI (long-term overload L, short-term short circuit S, instantaneous I), excluding ground fault G protection
Power supply mode: self powered (taking power from the main current through the internal CT of the circuit breaker), without the need for external control power supply
Adjustable range of rated current: Ir=0.4~1.0 × In
Long time delay adjustable: tr=3~30 seconds
Short time setting current adjustable: Isd=1.5~10 × In
Short time delay adjustable: tsd=0.1~0.4 seconds
Filtering function: Built in Tx (transmitter) signal filter to suppress high-order harmonic interference
Communication interface: None (pure local protection, no communication port)
Trip indication: mechanical locking sign (L, S/I separation indication)
Working voltage: self powered by internal CT, supporting a wide range of 21.6V~31.2V
Electrical isolation: Isolation between input channel and control circuit ≥ 1500V
Protection level: IP20, suitable for installation inside control cabinets
Working temperature: -20 ° C to+60 ° C
Storage temperature: -40 ° C to+85 ° C
Installation method: Integrated installation within the Emax E5 circuit breaker frame, DIN rail compatible
Compliant with standards: IEC 60947-2, UL 489, CSA
Main functional features
Tx filtering function: This is the core feature that distinguishes this version from regular E5LA. The built-in signal filter can effectively suppress the interference of high-order harmonics and electromagnetic noise generated by working conditions such as frequency converters, soft starters, and motor startups on current sampling, ensuring that the protection action is not misoperated or rejected in high EMI environments. The filter has significantly better attenuation ability for interference signals in the frequency range of 2kHz to 10kHz than the unfiltered version, making it suitable for driving a large number of frequency conversion equipment in power distribution systems.
Self powered design: Power is taken from the main circuit through the internal current transformer of the circuit breaker, completely independent of external control power supply. This means that even in extreme scenarios such as complete loss of control power, start-up of backup generators, and islanding grid switching, the protection function is still 100% available, which is a key difference from digital release devices that require external power supply.
LSI three-stage protection: L (long-term overload) adopts inverse time curve to accurately simulate the thermal accumulation characteristics of thermal relays, providing delay protection for continuous overload; S (short circuit) provides magnetic release with adjustable delay to achieve selective coordination with downstream equipment; I (instantaneous) achieves rapid disconnection for severe short circuits (action time<20ms). The three-stage protection is manually set through the front panel dial without the need for programming tools.
Mechanical tripping indication: The mechanical symbol locked after tripping clearly distinguishes between L (overload) and S/I (short circuit). After the operation and maintenance personnel arrive at the site, they can immediately determine the type of fault without retrieving historical data or connecting to a laptop, which is of great value in emergency repair scenarios.
Parameterized tuning: The four parameters Ir, tr, Isd, and tsd are independently adjusted through the front panel knob, with clear scales that take effect in real time after tuning. Support selective coordination with downstream protection devices through time current curves.
Start self check: Automatically check the electrical ID of the module when powered on, and do not enter the running state when it does not match the circuit breaker configuration, to prevent protection failure caused by mismatching.
Hot swappable support: Supports replacing the release without disconnecting the circuit breaker, reducing the risk of shutdown.
Comparison with products in the same series
PR121/P, PR122/P, and PR123/P are ABB Emax’s new digital release devices that support Modbus/Profibus communication, event recording, and remote tuning, but require external control power and firmware upgrades pose network security risks. The core advantage of E5LA HENF105296R0001 Tx Filter lies in “zero dependency, zero communication, and zero maintenance” – no external power supply, no communication network, and no software tools required. Technical personnel can complete all debugging with a screwdriver and multimeter. E5LSIG (such as HENF105296R0101) adds ground fault G protection on the basis of LSI, which is suitable for scenarios that require single-phase ground protection. E5L is a basic model without short-term delay. E5LA Tx Filter is irreplaceable in scenarios that require anti-interference filtering and minimal maintenance.
Typical application scenarios
In the power industry, the Tx filtering function can effectively prevent false tripping, especially in situations with a large number of frequency converter loads, for the protection of power busbars for generator sets and main feeders for low-voltage distribution cabinets.
Chemical industry: Reactor motor inlet protection with strong electromagnetic interference resistance, suitable for variable frequency drive scenarios.
Metallurgical industry: Circuit breaker protection for auxiliary equipment of rolling mills and continuous casting machines, resistant to high temperature and high vibration environments.
Water treatment: The main circuit breaker of the variable frequency water supply system in the pump station is protected, and the self powered design ensures that it can still be protected after a power outage.
Data center: Emergency distribution feeder protection, deterministic actions take priority over remote monitoring.
Ship industry: Main distribution panel protection, resistant to salt spray corrosion, does not rely on ship borne DC control voltage.
