Transformer Differential + Over Current + Restricted Earth Fault./li>
3 element Over current IDMT/DMT with instant trip./li>
Programmable Starting Current & Dual Bias Characteristics
Wide Bias Setting 10% to 50%
Programmable Pick-up characteristic
Harmonic Restrain for Transformer Charging & CT Saturation condition
Instantaneous Protection with adjustable timer.
Software base Vector group selection.
Non Restrain Time delay backup protection
Breaker Fail & Trip Circuit Supervision function.
The relay is designed using modular removable terminal, having CT sorting arrangement. This make very easy for removing relay for maintenance and calibration and testing. Most of the relays are multifunction and having large numbers of setting.
Model
Functional Details
Cabinet Style
ADR233B
Transformer Protection Relay
CSE
ANSI Code
Description
27
Under Voltage Protection
46BC
Broken Conductor
46
Negative Phase Sequence Protection
50/51
Definite & Inverse Time Phase Over current Protection
50N
Instantaneous/Definite Time Ground Over current Protection
51N
Inverse Time Ground Over current Protection
64G
High / Low Impedance Restricted Earth Fault Protection