ComPass A 2.0

Short-circuit and earth fault indicator with high-precision measurement

The ComPass A 2.0 is suitable for use in substations with a remote control connection of the electrical power distribution in a medium voltage network. Trip current values and pre-fault current values are logged with time stamp.

In addition to the short-circuit and earth fault function, the ComPass A 2.0 measures the temperature, for example of a transformer or the transformer station with the PT100 sensor.

The ComPass A 2.0 provides the collected information, measured values and their limits, for transmission to the control room. Phase selectivity and faults (earth fault or short-circuit) are also shown in the OLED display.

Equipment set includes:

  • 1 display unit
  • 3 single-phase current sensors
  • Short-circuit and earth fault indicator
  • Suitable for all types of networks / neutral point treatments
  • Earth fault detection with earth short-circuit and pulse detection method
  • LEDs and OLED display: for good visibility
  • High-precision current measurement to 0.5 %
  • PT100 temperature sensor for equipment monitoring
  • Monitoring of the parameters current (I), temperature (T) and frequency (f)
  • Limit monitoring: I, T
  • Compass Explorer Software: Commissioning and parameterisation via front accessible USB port

Your advantages

  • Fast commissioning and parameterisation
  • One indicator for all type of networks
  • Retrofit ready for earth and short-circuit indicators with monitoring/control and fault direction function

Technical specifications

Earth fault detection methods

Earth short-circuit, pulse detection

Low-impedance/short-term low-impedance earthed ---
Isolated earthed ---
Resonant earthed ---
Indication

LED status display; OLED display

Measured values

Phase currents I1, I2, I3, IE with phase angle

Operating current I 1,2,3 Ø-vaules adjustable (1 - 60 min), I max. 24 h / 7 days / 365 days, maximum demand indicator Imax. LR (Last Reset), Tmin. LR, Tmax. LR

Frequency f

Temperature T

Short-circuit trip current

10 - 2,000 A, self-adjustment (200 - 2,000 A)

Response delay short-circuit

20 ms - 60 s

Earth short-circuit trip current

10 - 1,000 A

Response delay earth short-circuit

40 ms - 60 s

Trip current transient method -
Trip current active current cos ɸ -
Response delay active current cos ɸ -
Trip current reactive current sin ɸ -
Response delay reactive current sin ɸ -
Trip current permanent earth fault -
Response delay permanent earth fault -
Trip current pulse detection 1 - 200 A
Limit overload current 5 - 1,500 A
Limit overvoltage -
Response delay overload current 40 ms - 60 s
Response delay overvoltage -
Limit undervoltage -
Response delay undervoltage -
Limit active power -
Response delay active power -
Trip current reactive power -
Response delay reactive power -
Limit temperature -40 to +85 °C
Phase currents

±0,5 % (0 - 630 A)

±3 % (630 - 1.500 A)

±5 % (1.500 - 2.000 A)

closed sensor type

Voltages -
Relay contacts 4
Remote contact

Potential-free permanent or momentary contact (>1 s), bistable, NC or NO

Contact capacity: 230 V AC/1 A/62.5 VA max.

220 V DC/1 A/60 W max.

RS485/Modbus-RTU ---
USB port ---
Binary inputs 2
Ethernet interface -
Resistive -
Capacitive -
Manual ---
Remote -
Software via USB ---
Manual reset ---
Remote reset ---
Automatic time reset ---
Reset via interface ---
Reset on current restoration ---
Reset on voltage restoration -
Reset on restoration of auxiliary supply ---
Reset via Explorer Software ---
Internal power supply

Long-life lithium cell, active flashing time >1000 h, >1000 display activations, shelf life ≥20 years

External auxiliary supply 24 - 230 V AC/DC
CT powered -
Housing

Polycarbonate, IP50

Temperature range -30 to +70 °C
Cable diameter -
  1. OLED display: easy to read in all lighting conditions
  2. Displaying the measured values and configuring via the display
  3. Rocker switch for easy handling
  4. Easy parameter setting and commissioning via USB port
  5. Reverse polarity protected plug-in terminals for quick and easy installation
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