Elmex Terminal Blocks: Shaped by perfection, proven by Lloyd's Register

In the Marine World, there’s no such thing as "good enough" when it comes to electrical systems.  Constant vibration, corrosive salt spray, brutal temperature swings demand components that are made for survival.  This isn't a factory floor; this is the open ocean, where failure isn’t an option.

At Elmex, we don’t just claim our Terminal Blocks can handle marine extreme conditions we prove it with Lloyd’s Register (LR) certification, the gold standard in maritime safety.  Tested under extreme conditions, our blocks deliver unmatched durability across all marine environments:  ENV1, ENV2, ENV3 and ENV4.  Our rigorous testing simulates the most challenging marine conditions and includes environmental, resonance search and vibration testing.  This comprehensive testing ensures each block provides dependable performance for its intended use, giving marine operators peace of mind.

Environmental Categories:

• ENV1 (Dry, Indoor): For non-critical port infrastructure such as Power Distribution Load, Metering Kiosk, and General Control Panels.
• ENV2 (Moderate Exposure): For critical port infrastructure like Communication & Security Control Systems, in areas with some humidity and dust.
• ENV3 (Aggressive Industrial): For highly critical port infrastructure, including Control Panels for Desalination Plants, Pollution and Waste Control Systems, Oil Skid Systems, and Dry Dock Revenue Metering Systems, where they face higher heat and humidity.
• ENV4 (Severe Applications): For the most severe offshore conditions with intense vibration, dust, and chemicals, used in Off-shore Vessel Skids and Ship Control Systems.

1. Environmental Testing:

The Environmental Test evaluates terminal blocks under extreme temperature, humidity, and salinity to ensure long-term reliability.

Electrical Integrity Check:  Before and after each environmental stress test, a millivolt drop (mV drop) and high-voltage (HV) test are conducted.  This verifies that contact resistance and insulation integrity are preserved, proving long-term electrical reliability.

• Dry Heat Test:  In a hot air chamber, blocks are subjected to elevated temperatures for an extended period to confirm their resilience to heat without damage or performance loss.
• Damp Heat Cyclic Test:  To test against humidity and potential corrosion, it undergoes cycles (2 Cycles 12+12 hours) of high temperature and humidity, which induces condensation.  This checks for material breakdown and corrosion resistance.
• 
  Cold Test:  Terminal Blocks are gradually cooled to sub-zero temperatures and held for a set duration, ensuring they can withstand extreme cold without compromising functionality.

2.     Resonance Search Testing:

Marine vessels are in constant motion, and continuous vibration can cause components to fail if

their natural resonant frequency is hit. The resonance search test is designed to prevent this outcome.

• Frequency Sweep: The frequency of vibration is gradually varied across a specified range to identify the resonant point(s).
• Amplitude: During the sweep, a constant vibration amplitude (per standard) is maintained to identify any frequencies that cause resonance, where vibrations are amplified and stresses increase.
• Axes: The test is conducted along all axes (x, y, z) to cover possible directions of resonance.
• Observation: The response of the terminal block (displacement, looseness, or deformation) is carefully monitored to detect resonance peaks.

3.     Vibration Testing:

This test takes the stress a step further by simulating the sustained mechanical forces experienced throughout a vessel’s operational life.

• Amplitude: The vibration amplitude is set at a standard 1mm, though it is adjusted based on the specific test environment (e.g., transport, machinery, electronics).
• Frequency: The terminal block is subjected to vibrations at frequencies defined by standard specifications, often sweeping through a range to test its resilience against various vibrational forces.
• Time: The test cycles through a range of frequencies over a specified duration, with the vibration amplitude and frequency controlled according to standards.
• Multi-axis Vibration:  This procedure is performed along the X, Y, and Z axes to replicate forces from all directions.
• Verdict:  The block passes if it maintains full mechanical and electrical integrity, with no physical damage or loss of electrical continuity, even after prolonged exposure.

Elmex controls Pvt. Ltd. provides a comprehensive range of Terminal Block solutions engineered for the demanding environment of the marine and shipbuilding industry, these products are designed to withstand extreme conditions like vibration, corrosion, salt and dust with features like vibration-proof connections, anti-loosening mechanisms, salt fog resistance, and Lloyd's Register certification.

Vibration-Proof Solution for Marine Environment:

Elmex offers Feed-Through Terminal Blocks with different connection technologies for marine applications that withstand constant vibration and corrosion.

• PQ Series: The Elmex PQ series (PQ1.5 to PQ10) uses push-in connection technology Offers quick, tool-free wiring that is resistant to vibration, ideal for smaller conductors in electrical, instrumentation and control, PLC - SCADA automation panels, and junction boxes.
• SQ Series:  The Elmex SQ series (SQ2.5 to SQ16) uses a spring clamp connection system.  Provides continuous, stable contact pressure that acts as an anti-loosening mechanism against marine shocks and vibration, ensuring long-term reliability in various panels.
• TQ Series:  The Elmex TQ series (TQ2.5 to TQ10 and TQC2.5 to TQC25) Designed for reliable power distribution in marine infrastructure, suitable for a wide range of conductor size.  It features durable, corrosion-resistant screws clamp with an anti-loosening mechanism to handle high currents and torque in harsh conditions.

Compact Connections for Marine Panels:

The marine industry faces significant challenges in control and power distribution panels due to limited space and harsh conditions, including constant vibration and motion.

To meet demanding marine requirements, where space is limited and harsh conditions like vibration are common, Elmex offers space-saving Multi-Conductor Terminal Block solutions.  For high wiring density. The blocks, available in PQ, SQ, and TQ series provide distinct clamping technologies.  Products like PQ2.5-1X2, SQ6-2X2, and TQKFT4-1X2, among others, ensure secure, maintenance-free connections to improve reliability and reduce installation errors.

Stackable Connections for Compact Marine Systems:

For marine electrical systems, limited space and constant vibration are persistent challenges.  The continuous motion may loosen standard connections, increasing the risk of system failures.

Elmex Multi-Level Terminal Blocks maximize space in marine control panels by stacking connection tiers, increasing wiring density.  The blocks, available in PQ, SQ, and TQ series, Products like PQ2.5-2T, SQ4-2T, and TQ2.5-3T+E, among others, The TQ series also comes in integrated earthing.  In SQ2.5-2T+IS TB, two levels are internally connected.  These blocks are ideal for distribution applications, utilizing shorting links on the lower level for effective potential distribution.

Quick Circuit Disconnection and Isolation for Marine Panels:

Disconnecting conductors to test marine control panels is a hazardous, slow, and damaging process that increases downtime, especially for mission-critical applications.

Elmex Knife-Disconnect Terminal Blocks use a hinged knife-edge switch for quick, safe circuit isolation and diagnostics without disturbing permanent wiring.  Available in PQ, SQ, and TQ series, the blocks include multi-conductor for SQ and TQ series.  The TQ series offers additional options like integrated earthing, multi-level and other series.  Products like PQK2.5, SQK2.5-1X2, and TQK4-2T, among others, utilize clamping technology for secure, maintenance-free connections.

Integrated Circuit Protection for Marine Electrical Systems:

In the marine industry, reliable circuit protection is essential in control panels to prevent expensive equipment damage, system unreliability, and safety hazards from overcurrent or short circuits.

Elmex Fuse Terminal Blocks offer combining circuit protection, fault indication, and grounding in a compact design, it uses an integrated fuse to protect components from overcurrent.  A built-in LED alerts users to a blown fuse, allowing for quick troubleshooting.  Available in PQ, SQ, and TQ series, Products like PQF4, SQF4AD, and TQF4-2T, among others, the TQ series also comes in multi-level and integrated earthing for safely directing fault currents to the ground.

Simplified Electrical Testing for Marine Systems:

The conventional practice of disconnecting conductors for marine control panel maintenance is inefficient and unsafe, risking faulty connections and higher error rates.

Elmex Test Disconnect Terminal Blocks (OAT6DTS and OAT10DTS) allow safe isolation and easy testing without disconnecting wires.  They feature integrated test probes and shrouded covers for safety, plus a special foot design for effortless mounting and removal.

Heavy-Duty Power Distribution for Marine Applications:

High-current marine connections must be secure, as vibration can loosen conventional connections, causing resistance, overheating, and system failure.

Elmex high-power Terminal BlocksSPT XL series (SPT35XL to SPT300XL) feature hinged, finger-safe shrouded covers with built-in test probe openings for safe testing, A copper bar ensures stable current and prevents overheating, while a serrated nut provides vibration-proof, secure connections.

Secure Grounding for Marine Safety:

Reliable grounding is essential for marine control panels; high-resistance grounding fails to dissipate fault currents, which risks electrical shocks, equipment damage, and system failure.

Elmex Earth Terminal Blocks provide secure, low-resistance grounding with a copper alloy foot that mounts directly to the DIN rail.  Available in PQ series for multi-conductor, the blocks include multi-conductor and multi-level for SQ and TQ series, Products like PGQ2.5-1X2, TGQ2.5-3T, among many others, feature robust clamping for secure and vibration-resistant connections.

Space-Saving by Design for Confined Marine Systems:

The limited space and constant vibration found on ships require marine electrical components to be compact, high-performing, and equipped with robust, reliable connections.

Elmex Mini and Micro Terminal Blocks offer compact design maximizes cable density while their advanced clamping technology ensures secure, vibration-resistant, and maintenance-free connections.  Available in the SQ series, Products like SQM2.5, SQP2.5, and SQP2.5P4, among others, these blocks offer wiring flexibility without compromising safety or performance.