Stelmec

Bandra West, Mumbai, Maharashtra

A fast operating, multi-contact, attracted armature relay with a high degree of mechanical stability, Type SLR AH33 has hand-reset contacts and an operating coil cut-off contact.The control coil of the relay element is wound with super enameled copper wire with a short time thermal rating since the relay has a very fast operation with operating time < 20ms.A coil cut-off contact (NC contact of same element) with suitable break rating is internally wired in series with the coil. This makes coil energization momentary & disconnects the coil on operation.The Mechanical interlock operates & Relay remains in lock out position until it is hand reset.A mechanically operated hand reset type flag, is provided as an operation indicator. White for reset position & Red for Lock out indication.The contacts are designed to have superior contact rating with minimum wear and tear.The elements are mounted in compact, non-drawout case, suitable for flush mounting on panels.

The Stelmec make Master Trip Relay SLR JH13 is an Electromechanical High Speed Tripping Relay used in tripping and signaling circuits of protective relays, where a high degree of reliability & high contact rating is required. It is an instantaneous switching element that is used for Contact multiplication of Protection relays of Circuit Breakers, thereby providing number of simultaneous instantaneous switching operations.

This type of relay is used to supervise the DC supply. The relay coil terminals 1 & 2 are connected to the DC supply, which is to be monitored. In case, the DC auxiliary supply is available, the relays NO contact closes and healthy status is indicated through WHITE flag. In the absence of the DC auxiliary supply, the same is indicated through RED flag.