schneider-electric
Schneider Electric Micrologic Trip Unit
Model: LV432790
4-hour response · Pricing in SAR · Delivery across all KSA regions
LV432790 — Schneider Electric Micrologic Trip Unit
The Schneider Electric Micrologic trip unit is the advanced electronic protection and measurement module that converts a ComPacT NSX or MasterPact circuit breaker from a basic thermal-magnetic device into a precision digital protection relay with integrated power metering, communication, and diagnostic capability. Micrologic units are available in variants 2 through 7 and X, with each higher number adding protection and measurement functions: Micrologic 2 provides LSIG adjustable protection, Micrologic 5 adds class 0.5 energy metering, Micrologic 6 adds differential earth fault protection, Micrologic 7 adds power quality measurement including THD and harmonics, and Micrologic X adds IEC 61850 GOOSE, arc flash detection, and EcoStruxure cloud connectivity.
The Micrologic's adjustable protection parameters — independently settable long-time pickup (Ir), short-time delay pickup (Isd), instantaneous pickup (Ii), and ground fault pickup (Ig) — enable precise selective coordination between upstream and downstream circuit breakers in complex distribution networks. Setting selectivity in the range of 10 ms minimum ensures that only the faulted circuit breaker trips during a fault, maintaining power continuity to all healthy distribution branches. The Micrologic's built-in test function verifies the trip unit's protection logic by injecting a test signal without requiring primary injection testing, simplifying periodic trip unit verification at maintenance shutdowns.
In Saudi Arabia, Micrologic trip unit upgrades are a commercial service activity offered to existing ComPacT NSX and MasterPact installations where the original thermal-magnetic (TM-D) trip unit no longer meets the operator's protection, metering, or communication requirements. ARAMCO and SABIC facility upgrade projects routinely include Micrologic 5 or Micrologic X trip unit replacement as part of the plant's digital transformation programme, enabling energy monitoring and remote diagnostics without replacing the circuit breaker frame. SEC-approved LV switchboard manufacturers specify Micrologic in new builds for their coordination and metering capability.
Razz Middle East provides Micrologic trip unit supply, configuration, and commissioning services for both new NSX/MasterPact installations and existing breaker upgrade projects across Saudi Arabia, including trip unit setting coordination studies and EcoStruxure Power integration.
Technical Specifications
Full specifications for the LV432790
- Micrologic Variants
- 2 (LSIG) / 5 (energy) / 6 (earth fault) / 7 (power quality) / X (IEC 61850 + arc flash)
- Protection Parameters
- Ir, Isd, Ii, Ig (independently adjustable)
- Energy Metering
- Class 0.5 (Micrologic 5+)
- Communication
- Modbus RTU/TCP (Micrologic 5+)
- IEC 61850 GOOSE
- Micrologic X
- Arc Flash Detection
- Micrologic X
- Selectivity
- 10 ms minimum trip time
- Test Function
- Built-in self-test without primary injection
Key Features & Benefits
- Independently adjustable Ir, Isd, Ii, and Ig protection parameters enable precise selective coordination with upstream and downstream devices, ensuring only the faulted circuit breaker trips during distribution faults.
- Class 0.5 energy metering accuracy in Micrologic 5 and higher variants satisfies SEC billing accuracy requirements at transformer feeder level without a separate external energy meter.
- IEC 61850 GOOSE communication in Micrologic X enables bus protection schemes with sub-4 ms trip times, replacing conventional 24 V pilot wire ZSI circuits with faster and more reliable digital communication.
- Arc flash detection in Micrologic X limits incident energy to below 1.2 cal/cm² (below NFPA 70E HRC 0 boundary), providing the highest available level of arc flash protection for switchboard maintenance personnel.
- Built-in self-test verifies protection logic and trip coil function during periodic maintenance without primary current injection, reducing maintenance shutdown duration and specialist test equipment requirements.
- Field-replaceable design allows upgrade from TM-D thermal-magnetic to any Micrologic variant in an existing ComPacT NSX without replacing the circuit breaker frame, protecting the original switchboard investment.
- EcoStruxure Power cloud connectivity in Micrologic X provides live power measurement, trip event notification, and remote parameter adjustment access to facility managers and Schneider Electric's remote service team.
Industrial Applications in Saudi Arabia
- ComPacT NSX protection upgrade at ARAMCO and SABIC facility distribution boards where existing TM-D trip units are replaced by Micrologic 5 to enable energy monitoring under plant digital transformation programmes.
- MasterPact MTZ trip unit specification in new LV switchboard assemblies for SEC-approved panel builders, where Micrologic X satisfies IEC 61850 bus protection and arc flash mitigation requirements in the same trip unit.
- Energy sub-metering circuit breaker trip units in ROSHN housing development community management systems, where Micrologic 5 accuracy enables individual building energy billing from distribution board level.
- NEOM smart city LV distribution network protection where Micrologic X IEC 61850 GOOSE enables centralised network protection coordination across the city-scale power distribution system.
- Selective coordination study trip unit parameter setting for large commercial building distribution systems in Riyadh and Jeddah, where Micrologic's independent parameter adjustment enables tight coordination margins.
- Trip unit upgrade programme for existing MasterPact NT/NW installations at Saudi industrial sites, where Micrologic X replacement provides arc flash detection and EcoStruxure connectivity without frame replacement.
- Healthcare facility main and sub-distribution board trip unit specification in Ministry of Health hospitals, where Micrologic 6 earth fault protection provides fire prevention-level detection on large main distribution cables.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — LV432790
Common questions from buyers in Saudi Arabia and the GCC