PHASE SHIFT RELAYS, PMA TYPE
Phase shift relays of the series are suitable for pump protection against dry running in single or three-phase systems.
They are powered by the AC supply controlled and are equipped with one relay output.


Operational characteristics

  • Modular version
  • Supply voltage 50/60Hz: 220-240VAC and 380-415VAC
  • Direct connect or by current transformers
  • Resetting input for PMA40
  • Resetting or inhibition input for PMA50
  • Relay output with changeover contact rated 8A 250VAC AC1 duty
  • Green LED indicator for power on
  • Red LED indicator for relay state
  • IP40 front degree of protection.
      

Functions

Phase shift relays

PMA40

 PMA50

Dry running pump protection

●

  

Single-phase system

 ●

  

Three-phase system

  ●

  

Minimum single-phase shift

   

 ●

Maximum single-phase shift

   

 ●

Minimum three-phase shift

   

 ●

Maximum three-phase shift

   

 ●

 

Order
code

Rated
current 
Ie
[A]

Auxliary
supply
voltage
[V]

  Functions
 RELE' PER RETI TRIFASI.
 PMA40 A240  0.25-16 220...240VAC - Single-phase system
- Three-phase system
 PMA40 A415 380...415VAC
 PMA50 A240  0.25-16 220...240VAC - Minimum single-phase shift
- Maximum single-phase shift
- Minimum three-phase shift
- Maximum three-phase shift
 PMA50 A415 380...415VAC
   

 
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