UL 2367-2021 pdf download – Solid State Overcurrent Protectors.
5.3 ENCAPSULANT – A molding material that is typically cast or injection molded around and is intended to insulate and protect the device. Encapsulated devices do not employ supplementary surrounding shells hence the encapsulant functions as an electrical enclosure. 5.4 EXPOSED PLANT (OUTSIDE PLANT) – Any portion of the telecommunications network subject to accidental contact with or induction from power conductors at a voltage exceeding 300V to ground. This includes circuitry that is intended to be connected to the Public Switched Telephone Network (PST-N), Off- Premises Extension (OPE) lines, and the like. 5.5 MAXIMUM CONTINUOUS CURRENT (CONT. CURRENT) – This designation is the ampere rating for which a protector or family of protectors has been tested for continuous current operation. 5.6 OPERATING AMBIENT TEMPERATURE RANGE – The ambient temperature range for the protector when operating in accordance with the manufacturer’s specifications. 5.7 PROTECTIVE CURRENT (PROT. CURRENT) – This designation is the ampere rating for which a protector or family of protectors has been tested for providing overcurrent protection. 5.8 TELECOMMUNICATION (TELEPHONE) NETWORK CIRCUIT – An electrical circuit conductively connected to the telephone company communications facilities. 5.9 TELECOMMUNICATION NETWORK CONNECTIONS (TNC) – Identified as follows: a) Not intended for use on telecommunication network with outside plant connections. b) Intended for use on telecommunication network with outside plant connections.
12.3 The device is to be energized continuously until constant temperatures are reached on and about the device. 12.4 The temperature test is to be conducted at an ambient temperature within the range of 10 – 40 °C (50 – 104 °F). Where the manufacturer’s specified maximum operating ambient temperature is higher than 40 °C (104 °F), the test is instead to be conducted at the manufacturer’s specified maximum operating ambient temperature. 12.5 When a test is conducted at an ambient temperature other than 25 °C (77 °F) or other than the maximum operating ambient temperature required in 12.4, an observed temperature shall be corrected as described in 12.6. Neither a corrected temperature nor an observed temperature shall exceed the required values specified in 12.1. 12.6 An observed temperature is to be corrected by addition [if the ambient temperature is lower than 25 ° C (77 ° F) or the required maximum operating ambient temperature] or subtraction [if the ambient temperature is higher than 25 °C (77 °F) or the required maximum operating ambient temperature] of the difference between 25 ° C or the required maximum operating ambient temperature, and the measured ambient temperature. 12.7 When a corrected temperature exceeds the required value specified in 12.1, at the request of the manufacturer, the test may be repeated at an ambient temperature closer to 25 °C (77 °F) or the required maximum operating ambient temperature, whichever is applicable. 12.8 A temperature is considered to be constant when three successive readings taken at intervals of 10 percent of the previously elapsed duration of the test, but not less than 5-minute intervals, indicate no further increase.