Earth leakage & fault current relay
Earth leakage- and fault current relays give you an early warning of isolation deterioration and leakage current. The relay monitors fault current in DC systems and help you avoid damage in machines and injuries to people.
If the current exceeds the set level, the relay will react and indicate a fault.
All our relays can indicate faults in the +/- cable, and some even in branched systems. This make your maintenance work much easier.
The relays have LED status lights, high accuracy and noise immunity.
DC earth failure relay
DDCA is designed to monitor IT systems for isolation degradation and to selectively indicate faults in branched systems. In addition, to facilitate maintenance, it can show whether the fault is related to the positive or negative wire.
Features:
- early detection of insulation deterioration and earth leakage
- configurable trip levels and alarm outputs to suit specific application requirements
- high immunity to false trips caused by noise and electromagnetic interference
- wide DC supply range from 18 to 340 V
- directional 12 ± 8mA output and LED indication for supervision and easy trouble shooting
Benefits:
- detects faults in both single and branched systems
- used with only one wire through the sensing core
- improves safety in industrial environments
- increases protection of electrical equipment against damaged caused by earth leakage
- reduces downtime and maintenance costs by detecting faults early
Use in:
- DC systems
- UPS
- batteries.
DC earth failure relay
with external coil
DDCB can monitor a circuit for connection and undercurrent. If the DC current falls below the set value, the relay will trip. Also shows if the fault is related to the positive or negative wire.
Features:
- early detection of insulation deterioration and earth leakage
- configurable trip levels and alarm outputs to suit specific application requirements
- high immunity to false trips caused by noise and electromagnetic interference
- wide DC supply range 18-340 V
- directional 12 ± 8mA output and LED indication for supervision and easy trouble shooting
Benefits:
- detects faults in both single and branched systems
- used with large cables or BUS bars
- improves safety in industrial environments
- increased protection of electrical equipment
- reduction of downtime and maintenance costs by detecting faults early
Use in:
- DC systems
- UPS
- batteries.
Earth leakage monitor for DC unearthed IT systems
The DC earth leakage relay is designed to monitor the isolation deterioration or faults in unearthed DC IT systems. DDEA is connected to earth through an active current limited circuitry, trying to keep the earth voltage at half the system voltage, or let the earth float with limited compensation current.
It ensures that special functions of an ungrounded system are still available while the fault can be located and repaired.
Features:
- monitors insulation deterioration and faults and gives an early warning if a current leak exceeds a preset level
- programmable leak current limit from 0,2 to 30 mA
- universal unit for a wide range of distribution system voltages from 20 to 500 V (nominal)
- works in fail safe mode
- 3-digit display shows actual current leak
Benefits:
- improved safety with timely notification of potentially hazardous earth leakage before serious injury or damage occurs
- protects against electrical shock and fires
- enables timely repairs and helps reduce maintenance costs
- can minimize downtime by identifying and warning before any earth leakage happens
helps protecting sensitive equipment
Use in:
- DC systems
- UPS
- batteries.
Earth leakage monitor asym & sym leakage for DC unearthed IT systems
Responds to both symmetrical and asymmetrical leakages providing extended insulation deterioration and fault monitoring.
Features:
- gives an early warning if a current leak exceeds a preset level
- programmable current leak limit from 0,2 to 30 mA
- universal unit for a wide range of distribution system voltages from 20 to 500 V (nominal)
- programmable leak current limit from 0,2 to 30 mA
- actual current leak is shown on 3-digit display
Benefits:
- improves safety with timely notification of potentially hazardous earth leakage before serious injury or damage occurs
- helps protect against electrical shock and fires
- enables timely repairs and helps reduce maintenance costs
- identifying and warning before any earth leakage happens can minimize downtime
- protects sensitive equipment
Use in:
- DC systems
- UPS
- batteries.
AC residual current and earth leakage relay
Residual current and earth leakage detection in single and branched systems. The DACA is the solution for AC installations where space and easy installation is of significant importance. The 3 channels with individual build in CT's for up to 2x4 mm2 cables allows for individual monitoring of each phase in 3 phase systems. For larger cables and load currents, the DACA can be supplied with terminals for external Zero Phase CT's with an output of 0,025 mA/Amp input.
Features:
- AC R.M.S. current measurement
- 4 fixed settings: 10, 30, 100 and 300 mA
- 4 adjustable ranges: 2-10, 6-30, 20-100 and 60-300 mA
- disconnectable terminal block for connections
- start-up delay and 0-10 sec. OFF delay
- compact design
Benefits:
- reliable protection from electric shock for workers, equipment and property
- helps to protect equipment from damage due to AC earth leakage current
- helps securing an efficient operation
- avoids false alarms
- easy to fit in and to instal
Use in:
- AC systems
- AC mains.
AC residual current and earth leakage relay with external coil
Same as DACA above, but supplied with terminals for external CT's for monitoring larger cables.
Features:
- measures AC R.M.S. current
- 4 fixed settings: 10, 30, 100 and 300 mA
- 4 adjustable ranges: 2-10, 6-30, 20-100 and 60-300 mA
- disconnectable terminal block for connections and external CTs for larger cables
- start-up delay and 0-10 sec. OFF delay
- compact design
Benefits:
- protects workers, equipment and property from electric shock
- can protect equipment from damage due to AC earth leakage current
- helps securing an efficient operation
- helps avoiding false alarms
- can monitor larger cables
Use in:
- AC systems
- AC mains.
