Long Test Block (LTB)
The SecuControl LTB is a robust, finger-safe test block engineered for IEC substations. Paired with keyed STP test plugs and built-in CT shorting, the LTB provides make-before-break operation and patented sequential opening (trip → current → voltage) so relays can be isolated and tested without risk of open CTs or nuisance trips. Its extended rear access (long rear end) brings relay connections closer to the block for neater, more efficient cabling and flush panel integration.
