micro controle – automação eletrónica


Phase loss and phase relay for protection of three phase motors – RSF 101 SIM

Since (without VAT): 32.95

Relay Sequence and Phase Out

Shipping is only available for Continental Portugal and Autonomous Regions (Madeira and Azores).

Product description

Phase failure relay (sequence and phase failure) for protection of three-phase motors. Action against phase breaks, or inverted sequence of motor phases.


  • Protection of three-phase motors against phase breaks or wrong phase sequence
  • Protection against phase unbalance
  • Control of the voltage value in generator sets


Power the relay (green led on – A.1)

The “S1” contact arms when the phase rotation is in sequence and the voltage value of all three exceeds the set minimum limit on the front panel scale, whether or not the neutral is present.

The “S1” contact disarms when the individual value of the measurement of one or more phases falls below the set minimum limit.

The neutral connection is optional, however when connected improves the stability of the measurement.

Note: The images shown may not correspond completely to the product described.

Additional information

Weight200 g
Dimensions11 × 8.5 × 6 cm
Sensitivity adjustable

85 a 100%

Room temperature

[-10ºC, +55ºC]

Output relay

AC 8A-250V / 50Hz – 1250VA DC 5A-24 V (C.R.)


AC (3 x 400V) / 50Hz


2VA (aprox.)


400V AC


Base de 11 pinos

micro controle - automação eletrónica