‘NELSTER’  Test Terminal Blocks offers convenience in, in-situ testing / calibration of electromechanical and electronic Polyphase integrated meters protective Relays etc, without disrupting the existing load circuit Housed in a high grade phenolic moulding with integrally moulded barriers, it offers ample protection against flash-over between terminals.All Terminals me high quality brass, duly Nickle plated and have 3.40 mm hole for cable entry and M3 screws for clamping. M4 Brass studs with washers and nuts are provided at the rear, in rear connection types. Sealing hole provided on the cover securing knobs and studs, prevent unauthorised access.The voltage terminals have shorting links and colour coded moulded knobs for operational convenience. Each group of current terminals consist of three terminals with interconnecting screws or links (depends wheather screw or link type) for injecting current from a portable test set or to short circuit Current Transformer Secondaries. These TTBs are available in screw or link type. for front or back connected applications.