Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
BA 9053

Current Relay

BA 9053


Auxiliary voltage

Start up delay

Measuring range

Switching delay



  • 0053101
  • BA9053/010 AC2-20mA AC230V 0-20S
The relays measure the arithmetic mean value of the rectified measuring current. The AC units... more

Product description

The relays measure the arithmetic mean value of the rectified measuring current. The AC units are adjusted to the r.m.s value. They have settings for response value and hysteresis. The units work as overcurrent relays but can also be used for undercurrent detection. The hysteresis is dependent on the response value.

Technical specifications

Enclosure design: Switch cabinet
Width: 22,5 mm
Operate delay: +
1- / 3-phase: 1
Output contacts: 2 Wechsler
Auxiliary voltage required: +
Measuring range max.: 25 A
Type: BA 9053


  • Preventive maintenance
  • For better productivity
  • Quicker fault locating
  • Precise and reliable


  • According to IEC/EN 60255-1, IEC/EN 60947-1
  • To: monitor DC and AC
  • BA 9053 with measuring ranges from 2 mA to 25 A
  • BA 9053 optionally with 3 measuring ranges 0.1 up to 25 A
  • MK 9053N with measuring ranges from 2 mA up to 10 A
  • High overload possible
  • Input frequency up to 5 kHz
  • Galvanic separation between auxiliary circuit - measuring ciruit
  • Auxiliary supply AC/DC; BA 9053 with AC
  • BA 9053 optionally with start-up delay (MK = standard)
  • with time delay, up to max. 100 sec
  • BA 9053 optionally with safe separation to IEC/EN 61140
  • MK 9053N optionally with remote potentiometer
  • As option with manual reset
  • Option with fixed settings possible
  • LED indicators for operation and contact position
  • MK 9053N as option with pluggable terminal blocks
    for easy exchange of devices
    - With screw terminals
    - Or with cage clamp terminals
  • Width BA 9053: 45 mm
    Width MK 9053N: 22.5 mm