CURRENT PROTECTION RELAYS PMA TYPE
The current monitoring relays of the series are suitable for use in single-phase systems.
All the relays have 24-240VAC/DC auxiliary supply and include one relay output. Current measures are TRMS (True Root Mean Square) values.


General characteristics

  • Modular housing
  • Auxiliary supply voltage 50/60Hz: 24-240VAC/DC
  • Direct connection or by current transformer (CT)
  • TRMS current measures (True Root Mean Square value)
  • Resetting and inhibition input
  • Relay output,  rated 8A-250VAC (AC1)
  • Green indication LED for power on
  • Red indication LED for function

  • Degree of protection: IP40 on front

Functions

Current protection relays

PMA20

PMA21 

PMA30

AC/DC low current 

●

 

●

AC/DC high current 

 

●

●

AC/DC low current with reset pulsing

 

 

●

AC/DC high current with reset pulsing

 

 

●

 

Order 
code

Rated 
current
Ie
[A]

Auxiliary
supply
voltage
[V]

Functions

PMA20 240

0.02 - 1 - 5 - 16
multiscale

24-240VAC/DC

AC/DC low current

PMA21 240

0.02 - 1 - 5 - 16
multiscale

24-240VAC/DC

AC/DC high current

PMA30 240

0.02 - 1 - 5 - 16
multiscale

24-240VAC/DC

AC/DC low current
AC/DC high current
AC/DC low current with reset pulsing
AC/DC high current with reset pulsing

 
HOME PAGE
LOVATO Electric S.P.A.