Latching Technology Used to Isolate Power Faults

A manufacturer of high voltage electrical power distribution equipment needed a solution to actuate a fault-interrupting device. TLX Technologies designed a durable solenoid with a manual reset feature.

Customer Problem

A manufacturer of high voltage electrical power distribution equipment needed a solution to actuate a fault-interrupting device. The solution needed to be stable and durable in a wide range of temperatures. The solution also needed a manual reset feature in the event of a fault that could not be cleared immediately (e.g. a fallen power line). In such a case, power to the affected section needed to be cut off until the fault was cleared.

The TLX Solution

TLX Technologies designed and produced a manual reset latching solenoid that utilized a permanent magnet and a heavy-duty spring. The permanent magnet held the solenoid in the latched position without using power. When the system detected a fault, a short pulse de-latched the solenoid and interrupted power. Power could only be restored to the affected area by manually resetting the solenoid, minimizing the possibility of power being inadvertently restored before the fault was cleared.

Manual Reset Latching Solenoid

Specifications
Stroke
22.9 ± .635 mm
Coil resistance at 20°C
5.75 ± 0.5 Ω
Latched spring load
59.16 ± 5.78 N (13.3 ± 1.3 lbs)
Response time
12 ms max
Release voltage
3 to 30 Vdc
Operating temperature range
-40 to 50°C
Durability
>100K cycles
Minimum trip energy
.030 J
Electric strength
500 VAC for 1 second

All TLX components are customized to fit system requirements, meaning technical specifications are unique to each customer and design. Examples given on our website are for illustration purposes only.

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