About MTB Fault Indication System MTB, or Mechanical Trip Button is a fault indication system incorporated in advanced protection relaying for electrical power networks. The MTB does not require auxiliary supply to provide a fault indication. The MTB is designed to prevent power circuits from re-energising before a fault is completely rectified. This is an essential safety feature which protection relays using electrical latching mechanisms are not able to provide .
Optional Features • Site Selectable sequences (S1, S2, S3, S4 ) • Pre-pogrammed Custom built operating sequences • Trip & Non-Trip grouping facility for MBAS 0600 • Manned / Unmanned function • Fault Follower contact output per fault Input (NO or NC) rd • Ringback sequence with optional 3 relay output for Ringback hooter, with Trip & Non-Trip grouping facility • Supply fail indication / annunciation • External and / or built-in control push buttons
Detection of very small current Compact Construction Suitable for MH Earth Leakage Relay Operating temperature: -20°C … 65°C Insulation Resistance: DC500V / 100MΩ min Transformation ratio: 1,150 / 1 A Current transformer as per IEC 60044-1 Leakage current range: 10mA … 30000mA Internal Diameter: Ø35mm, Ø50mm, Ø70mm, Ø105mm, Ø140mm
The EL 03D and EL 30D is a digital earth leakage relay for DIN rail mounting. The advanced design meets IEC60755 Type-A & AC operation to accurately deduce the leakage current level in network with high harmonics loads content. It provides real-time communication via Modbus-RTU protocol to Building Monitoring System / Energy Management System network and 2-Contacts Output to support traditional management system.
PA3 is a high-accuracy multi-function meter that provides wide range of power parameter measurements and can be applied to the power monitoring of general single-phase and three-phase systems. With Its compact size, easy installation, and low cost make PA3 suitable for modern electricity monitoring and load investigation.
Feature Primary current (AC) Secondary output (AC) Inner diameter (mm) Output integral cable (M) Option:5M or longer Output integral cable flow direction K & L Accuracy class (%) TSC-024 100A,150A,200A 250A,300A 5(standard) or 1 A 23.8 ±0.3 2 K: White L: Black 100A,150A - Class 2 200A,250A - Class 1 300A - Class 0.5