Relay
ELCB relay assemblies provide reliable earth leakage protection by detecting fault currents and ensuring rapid circuit disconnection.


Designed for accurate fault detection and fast response, our ELCB relay assemblies enhance electrical safety and system reliability across protection and control applications.
We offer a comprehensive range of precision engineered products designed to meet diverse application requirements across industries.
1
Operate using an electromagnetic coil to mechanically switch contacts for reliable fault detection and circuit control.
2
Use semiconductor devices with no moving parts to provide fast, silent, and long life switching performance.
3
Combine electromagnetic and solid state technologies to achieve both high reliability and efficient switching.
4
Detect overload conditions through heat generated by current flow to provide protection against prolonged faults.
5
Utilize sealed reed switches for fast, precise, and low power switching in sensitive control applications.


At Permanent Magnets Limited (PML), we manufacture high-performance relay assemblies designed to protect both equipment and human life from electrical hazards. These assemblies play a critical role in safety systems by detecting anomalies in current and isolating the circuit when thresholds are exceeded.
1
Surface Roughness (Ra): ≤ 0.02 µm. Flatness: ≤ 1 light band.
2
48% Ni:Fe: AC Permeability at 5 mOe = 12,000. 80% Ni:Fe: AC Permeability at 40 Gauss = 85,000.
1
Operates via magnetic field generated by coil current.
2
Activates upon exceeding current threshold or detecting leakage.
3
Used extensively in GFCI or ELCB applications for personal protection.
4
Components manufactured from high permeability 48 percent NiFe or 80 percent NiFe alloys.
5
High surface finish and flatness critical for performance.
With over 65 years of manufacturing excellence, PML delivers ELCB Relay Assemblies trusted by OEMs and Tier 1 suppliers across sectors demanding robust performance.

ISO 45001
Occupational Health and Safety (OH&S) management systems

ISO 14001
Environmental Management Systems (EMS)

ISO 9001
Quality Management Systems (QMS)

IATF 16949
International Standard for Automotive Management Systems

AS 9100
Aerospace Quality Management System (QMS)
A relay is an electro-mechanical switch that uses a small electrical signal to generate mechanical movement, enabling or interrupting the flow of a larger current. A polarized relay comprises a magnetic circuit formed by components like the armature and yoke.

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