Description
Supplemental short circuit protection for a variety of applications up to 63 Amps.
Sprecher+Schuh Series L8 Supplementary Protectors provide supplemental overcurrent protection for control circuits, solenoids, actuators, appliances, business equipment and a range of other applications where a high performance current limiting device is required. Advanced features and global approvals make them ideal for use in equipment installed throughout the world.
Series L8 Supplementary Protectors are available in up to 20 different current ratings from 0.5A to 63A, in one, two and three pole configurations. Over 180 base models are available with a full compliment of accessories.
Devices can be used in applications up to 480V AC and 48V DC with interrupting capacities up to 10kA.
Sprecher+Schuh Supplementary Protectors mount on a standard 35mm DINrail. Wire terminals accept multiple conductors, and UL 508 approved bus bars can be used to quickly distribute power to many Supplementary Protectors simultaneously. In addition, power to the circuit breakers can be fed from the line or load side
All Sprecher+Schuh L8 Supplementary Protectors are available with three different tripping characteristics, Type “B”, “C”, and “D”. The tripping characteristic defines the device’s speed of response (trip-time) to various levels of overcurrent.
Sprecher+Schuh L8 Supplementary Protectors are also current limiting - interrupting fault currents within one half cycle. Current limiting devices protect circuit components from damage by reducing the peak let-through current which causes damaging magnetic forces and let-through energy which generates heat.
Type “B” Characteristic:
Developed primarily to protect conductors and low level signal devices such as PLCs. Instantaneous trip is three to five times the rated current of the Supplementary Protector (3~5 x In). The fast trip time of these devices minimizes damage to control circuit conductors from low-level faults
Type “C” Characteristic:
Developed primarily for applications with moderate inrush currents such as lighting, control circuits and coils, computers and appliances. Instantaneous trip is five to ten times the rated current of the Supplementary Protector (5~10 x In). The higher instantaneous trip level prevents nuisance tripping, and components being protected can typically withstand higher fault currents without being damaged.
Type “D” Characteristic:
Developed primarily for applications with high inrush currents, i.e., transformers, power supplies and heaters. Instantaneous trip is ten to twenty times the rated current of the Supplementary Protector (10~20 x In). The high instantaneous trip level prevents nuisance tripping, and components being protected can typically withstand higher fault currents without being damaged.
Advanced Features:
- Box lug terminals accept #18…#4 (1.0…25mm2) wire as standard
- Ratings to 480Y/277V AC @ 230/440V AC - 10kA Interrupt Rating
- Amp rating and trip curve characteristic clearly marked on the device for easy identification
- Magnetic trip elements provide Type B, C and D trip characteristics, while bimetallic elements protect against slight overloads
- Line and load side terminals designed with dual terminals which allows the connection of two wires, or both a wire and a bus bar
- Guarded No.2 pozidrive terminal screws with finger-safe IP20 protection
- Devices install on standard 35mm DIN-rail (EN 50022)
- Trip-free mechanism; device operation cannot be defeated by holding the operator in the ON position
- Color coded indicator provides visual indication of the device status and isolation function
- Available in one, two and three pole
