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Origin: AT3W / Spain

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ATCONTROL/R P series protectors actuate when they detect a permanent overvoltage by tripping the connected contactor (normally open) (S1, S2). This contactor disconnects the line, thus protecting any equipment installed downstream. When the permanent overvoltage comes to a halt, the protector reconnects the contactor.

The warning system for permanent overvoltages consists of two luminous indicators: green (correct power supply) and red (overvoltage).It has a test button to check that installation has been executed correctly.



ATCONTROL/R PT protectors also actuate when they detect a transient overvoltage, diverting the current to earth and reducing the voltage to a level that does not damage the connected equipment.

Tested and certified as a type 2 protector in official and independent laboratories according to standards UNE-EN 61643-11 and GUÍA-BT-23 from the REBT. Appropriate for category I, II, III and IV equipment according to REBT (ITC-BT-23).

It has a thermodynamic control device that disconnects from the electrical network in case of deterioration, and also a warning system for transient overvoltages. When the warning is yellow, the protector is in good condition. If not, replace.


They must be installed in parallel with the low voltage supply line, downstream from the main circuit breaker, connected to the phase, neutral and ground. The contactor should be installed in series with the low voltage supply line, downstream from the protector. Installation should be carried out without power in the line.

Connect the S1 and S2 terminals to the contactor, always without voltage.



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Nominal current:  20 A 63 A
Nominal voltage: Un 230 VAC
Maximum overvoltage: Uc 400 VAC
Actuation voltage: Ua 275 VAC
Actuation time: @275 VAC → 3 - 5 s / @400 VAC → 0.1 - 0.2 s
Type of tests according to UNE- EN 61643-11: Type 2
Nominal current (8/20 μs wave):In 5 kA
Maximum discharge current (8/20 μs wave): Imax 15 kA
Protection level (wave 1.2/50 µs): Up 1.1kV
Contactor dimensions: 18 x 81 x 65 mm
(1 module DIN 43880)
36 x 81 x 65 mm
(2 modules DIN 43880)
Dimensions:   36 x 90 x 80 mm (2 modules DIN 43880)
Contactor cable range: Minimum / Maximum
section: 1 / 6 mm2
Minimum / Maximum
section: 1 / 16 mm2
S1, S2 cable range:    Minimum / Maximum section: 1 / 1.5 mm2​
Protector cable range:  Minimum / Maximum section: 2.5 / 35 mm2 
Tests certified according to standards: UNE-EN 50550, UNE-EN 61643-11
Relevant standards: UNE 21186, NF C 17-102, IEC 62305
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