DGF5-7 product page
The DGF5-7 is a microprocessor based ground fault unit for use on solidly grounded or resistance grounded systems. This innovative digital electronic unit measures ground fault current using a built-in 28 mm zero sequence Current Sensor (CS). With Control Voltage on, when the measured value reaches or exceeds the setting for current, during the delay time, the unit trips.
The system will react to alternating current (AC) only and will reject direct current (DC) signals. Accuracy will be maintained over a frequency range of 45 - 450 Hz, making it suitable for variable frequency drive applications. The DGF5-7 is a Class A device as defined in the IEC 60755 standard; it is therefore fully characterized for operation with sinusoidal AC and pulsating DC currents.
The maximum system operating voltage for the DGF5-7 is 660 V when passing the system power conductors through the built-in CS.
The DGF5-7 houses a non-isolated universal power supply from 24 - 240 V AC or DC and is equipped with form ‘Z’ (4 connections) isolated NO and NC contact sets to operate the upstream protection device and to indicate a failure of the system. The relay operating mode, the Ground Fault Current Trip level and Trip Delay Time are factory set, the custom values are stated on the product label on the unit.
The following options are available:
Operating modes:
Continuous Non-Failsafe
Continuous Failsafe
Pulsed Non-Failsafe
Pulsed Failsafe
Auto Reset Non-Failsafe
Ground Fault Current Trip level, 31 selectable values between 30 mA and 10 A.
Trip Delay Time, any value between 20 ms and 10 s.
By double clicking the remote ‘RESET’ button a functional test of the DGF5-7 is invoked.
A green LED indicates three functions: slow flashes denote Control Voltage is present (1 s flashes); steady on after a test was invoked, during delay before test continuous flashes (0,25 s); two fast flashes per second denotes the unit has sensed a ground fault current higher than the Trip Level for a period longer than the Trip Delay Time and that the output contacts have operated (two 0,25 s flashes).
A 8 point Pull-apart terminal block simplifies connection of field wiring.
The DGF5-7 is equipped with an aluminium profile enabling horizontal mounting on a DIN rail.
To ensure that the DGF5-7 will function in severe circumstances, it is encapsulated in polyurethane (PUR) to make sure it is not vulnerable to mechanical shock, vibration nor weather.
DGF5-7 product page
The DGF5-7 is a microprocessor based ground fault unit for use on solidly grounded or resistance grounded systems. This innovative digital electronic unit measures ground fault current using a built-in 28 mm zero sequence Current Sensor (CS). With Control Voltage on, when the measured value reaches or exceeds the setting for current, during the delay time, the unit trips.
The system will react to alternating current (AC) only and will reject direct current (DC) signals. Accuracy will be maintained over a frequency range of 45 - 450 Hz, making it suitable for variable frequency drive applications. The DGF5-7 is a Class A device as defined in the IEC 60755 standard; it is therefore fully characterized for operation with sinusoidal AC and pulsating DC currents.
The maximum system operating voltage for the DGF5-7 is 660 V when passing the system power conductors through the built-in CS.
The DGF5-7 houses a non-isolated universal power supply from 24 - 240 V AC or DC and is equipped with form ‘Z’ (4 connections) isolated NO and NC contact sets to operate the upstream protection device and to indicate a failure of the system. The relay operating mode, the Ground Fault Current Trip level and Trip Delay Time are factory set, the custom values are stated on the product label on the unit.
The following options are available:
Operating modes:
Continuous Non-Failsafe
Continuous Failsafe
Pulsed Non-Failsafe
Pulsed Failsafe
Auto Reset Non-Failsafe
Ground Fault Current Trip level, 31 selectable values between 30 mA and 10 A.
Trip Delay Time, any value between 20 ms and 10 s.
By double clicking the remote ‘RESET’ button a functional test of the DGF5-7 is invoked.
A green LED indicates three functions: slow flashes denote Control Voltage is present (1 s flashes); steady on after a test was invoked, during delay before test continuous flashes (0,25 s); two fast flashes per second denotes the unit has sensed a ground fault current higher than the Trip Level for a period longer than the Trip Delay Time and that the output contacts have operated (two 0,25 s flashes).
A 8 point Pull-apart terminal block simplifies connection of field wiring.
The DGF5-7 is equipped with an aluminium profile enabling horizontal mounting on a DIN rail.
To ensure that the DGF5-7 will function in severe circumstances, it is encapsulated in polyurethane (PUR) to make sure it is not vulnerable to mechanical shock, vibration nor weather.