Short-circuit indicator for cable and low voltage power meter 

Short-circuit indicator for cable - SICAM FCM - side view

SICAM FCM

Feeder Condition Monitor – Digital short circuit indicator with measuring function for medium voltage switchgears. The key to continuous improvement in the power supply is accurate knowledge about the relevant circumstances of the local energy supply system. Functionality: The SICAM FCM (Feeder Condition Monitor) is a phasefault and ground-fault indicator with directional indication that operates with protection algorithms and low-power current transformer technology as per IEC 60044-8/ IEC 61869-10 or the conventional 1 A/5 A instrument transformers. As an alternative, the SICAM FCM can also be connected using a capacitive voltage tap, thus effecting economical directional fault detection in the cable network. The SICAM FCM additionally offers the possibility of providing up-to-date measured values via the integrated Modbus RTU interface, thus ensuring a precise assessment of the distribution system. Cost-effective measuring device for use in Low voltage switchgears. The SICAM FCM (Feeder Condition Monitor) also performs well as a low-cost power meter in a low-voltage power system. It is optimized for flush mounting in low-voltage switch bays because of the low height.

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Features & functions

Short-circuit indicator for cable and low voltage power meter

Functions for medium voltage

  • For grounded, isolated and resonant- grounded systems
  • Integrated power-flow direction indicators
  • Directional short-circuit and ground-fault detection
  • Direct voltage measurement in low-voltage power systems
  • Link to capacitive voltage-detecting systems
  • Flexible ground-fault detection starting from 0.4 A

Communication

  • RS485 interface including Modbus RTU communication for all information and for remote parameterization/firmware updates, PC programming as an alternative

Signalization

  • Display for presenting up-to-date measured values or fault information in the power distribution system, 4 function keys
  • 3 LEDs for the operating state
  • 2 binary outputs

Measured Quantities

  • RMS measured values; accuracy class 0.5
  • Phase-to-ground voltages and currents, ground current, power frequency and cos φ, phase angle, active power, reactive power, and apparent power
  • Energy meter
  • Trailing pointer

Inputs

  • 3 inputs for alternating voltage selectively adjustable for 100 V/√3, low-power sensors with 3.25 V/√3 (as per IEC 60044-7) or 3 direct inputs for AC 230 V
  • Alternatively: 3 inputs for linking to LRM voltage-detecting systems (as per IEC 61243-5)
  • 3 inputs for low-power current transformers with 225 mV at rated current (as per IEC 60044-8/61869-10), the rated primary current is adjustable in the SICAM FCM device from 50 A to 2500 A; L2 current input can be configured for sensitive ground-fault detection using low-power current transformers with 225 mV at rated current (as per IEC 60044-8/61869-10), the rated primary current is adjustable in the SICAM FCM device
  • Alternatively: inputs for conventional instrument transformers 1 A/5 A via adaptors
  • 1 binary input

Temperature Range

  • From -40 °C to +70 °C

Auxiliary Voltage

  • DC 24 to 250 V, AC 230 V
  • Battery with lifetime > 15 years

Housing

  • Polycarbonate housing for panel flush mounting
  • Dimensions: 96 x 48 x 109,5 mm (W/H/D)
  • Protection class: front panel IP40, rear panel IP20

Low-Power Current Transformers for Medium Voltage

  • Phase-current sensor, 225 mV@300 A, 225 mV@700 A, accuracy class 0.5, split core, narrow type of construction
  • Core balance current sensor, 225 mV@60 A, accuracy class 1, split core, narrow type of construction
  • Voltage sensor, 10 kV, 10 kV/√3 : 3.25/√3, for symmetrical and asymmetrical T plugs, accuracy class 1
  • Voltage sensor, 20 kV, 20 kV/√3 : 3.25/√3, for symmetrical and asymmetrical T plugs, accuracy class 1

Functions for low voltage

Functions as a Power Meter
  • Calculation of active power, reactive power, and apparent power (P, Q, S), per phase and 3-phase
  • Calculation of power factors, per phase and 3-phase
  • Calculation of active and reactive energy for import/export, 3-phase
  • Inversion of the P, Q values
  • Rotating field detection
  • Power-flow direction indication
  • Directional short-circuit and ground-fault detection
  • Link to low-power sensors or conventional 1 A/5 A instrument transformers
  • Adjustable overcurrent, overvoltage and undervoltage alarms
  • Trailing-pointer functionality for currents/power

Communication

  • RS485 interface including Modbus RTU communication for all information and for remote parameterization/firmware updates, PC programming as an alternative

Signalization

  • Display for presenting up-to-date measured values or fault information in the power distribution system, 4 function keys
  • 3 LEDs for the operating state
  • 2 binary outputs

Measured Quantities

  • RMS measured values; accuracy class 0.5
  • Phase-to-ground voltages and currents, ground current, power frequency and cos φ, phase angle, active power, reactive power, and apparent power, per phase and 3-phase, power factor, per phase and 3-phase, rotating-field detection
  • Energy meter
  • Trailing pointer

Inputs

  • 3 inputs for alternating voltage selectively adjustable for 100 V/√3, low-power sensors with 3.25 V/√3 (as per IEC 60044-7) or 3 direct inputs for AC 230 V
  • Alternatively: 3 inputs for linking to LRM voltage-detecting systems (as per IEC 61243-5)
    3 inputs for low-power current transformers with 225 mV at rated current (as per IEC 60044-8/61869-10), the rated primary current is adjustable in the SICAM FCM device from 50 A to 2500 A; L2 current input can be configured for sensitive ground-fault detection using low-power current transformers with 225 mV at rated current (as per IEC 60044-8/61869-10), the rated primary current is adjustable in the SICAM FCM device
  • Alternatively: inputs for conventional instrument transformers 1 A/5 A via adaptors
  • 1 binary input

Temperature Range

  • From -40 °C to +70 °C

Auxiliary Voltage

  • DC 24 to 250 V, AC 230 V
  • Battery with lifetime > 15 years

Housing

  • Polycarbonate housing for panel flush mounting
  • Dimensions: 96 x 48 x 109,5 mm (W/H/D)
  • Protection class: front panel IP40, rear panel IP20

Low-Power Current Transformers for Low Voltage

  • 2 variants for rated currents of 100 A to 400 A, 300 A to 1000 A
  • As per the IEC 61869-10 standard
  • Accuracy class 1/0.5 with correction factors
  • Small housing form, installation without tools and without modifying the primary equipment
  • Sensor cable for direct connection (7 m in length)

Applications

Power Quality

Ensuring power quality in a phase of energy transition

 

Increasing power feed-in from renewable resources poses new challenges for municipalities and distribution system operators 

 

The stable supply of electric power is any grid operator’s top priority. To avoid fluctuations in power quality and prevent disturbances, grid monitoring, control, and automation systems need to be adapted and optimized across all voltage levels.

Power Generation

Maintaining control of distributed power producers 

 

Ensuring grid stability is becoming increasingly complex 

 

The vast number of small distributed power producers calls for new strategies to ensure consistent power quality. Identifying, locating, and eliminating disturbances and faults as well as the flexible, quick balancing of power production and load consumption require integrated hardware and software solutions that work smoothly together.

Grid Resilience

Intelligent technologies for stable grids 

 

Automation solutions and remote control technology enhance the reliability of distribution grids 

 

Despite every effort, grid disturbances and faults can never be entirely eliminated. This is why control room personnel must be enabled to work quickly and effectively to resolve problems in a targeted manner. Comprehensive automation and remote-control solutions optimize these capabilities.

CAPEX savings

Efficient grid expansion 

 

A combination of robust technology and digital innovations leads to increased efficiency 

 

Maintaining or even increasing grid performance is becoming ever more challenging. With growing efforts, expenses grow as well. Innovative technologies and smart data usage can help municipalities and DSOs to master these challenges and to increase their competitiveness.

Unplanned outages

Keeping your grids up and running 

 

Using sophisticated tools and solutions for fast grid restoration 

 

Unplanned outages cannot always be avoided. Flexible solutions for local and remote monitoring enable the fast and efficient restoration of cable grids and overhead lines.

OPEX savings

Optimizing business operations

 

Comprehensive and efficient ways for municipalities and DSOs to get the most out of their OPEX 

 

The growing demand for power from industries and households can be fulfilled simply. With modern technologies and innovative solutions such as optimized voltage and capacity management, self-healing grids, and by avoiding losses of any kind.

Customer benefits

For medium voltage

  • Cost savings due to precise and fast localization
  • Selective fault information with directional indication as a basis for "self-healing" applications
  • Resupply times in a minute or second range (depending on primary equipment) allow minimum power-system outages and minimum ultimate consumer payment losses
  • Up-to-date measured values for operation and planning support the focused use of investment funds in power-system planning and expansion
  • High-quality measurement technology with a high measuring accuracy in connection with low-power current transformers – no calibration or adaptation to primary values required
  • Use of inexpensive wide-range low-power current transformers
  • Telecontrol parameterization via SICAM A8000 and Modbus

 

For low voltage

  • Inexpensive power meter
  • Phase-segregated direction indication of phase faults and ground faults
  • One hardware platform for low-voltage and medium-voltage applications
  • Use of inexpensive wide-range low-power current transformers
  • High-quality measurement technology with high measuring accuracy in connection with low-power current transformers
  • Telecontrol parameterization via SICAM A8000 and Modbus
  • Low-profile height (50 % of normal power meters)
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