DDL800 – DC Line Fault Detector
Products family : Voltage Protection, Current Protection, DC Catenary
Sector : Railway
DDL800 performs monitoring of railway and tramway catenaries on DC electrical networks.
DDL800 acts according to rate of rise overcurrent criteria and includes a deicing monitoring function. A voltage protection is available as well as many operating functions such as a cable thermal image, a recloser with substation management and the check of the correct operation of the ultra fast circuit breaker.
The optional line test equipment EDL confirms the fault elimination before authorizing the closing of the circuit breaker.
ANSI codes
27DC – DC undervoltage
49DC – Cable thermal image (Direct Current)
59DC – DC overvoltage
76 – DC overcurrent
76BF – High speed circuit breaker failure (DC)
82 – DC load-measuring recloser
86 – Latching of the output contacts
87 – Differential relay