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Ground Fault Systems DGF100 Manual

Digital ground fault unit reference manual
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DGF100
Ground Fault Systems B.V.
Rigtersbleek-Aalten 4B15
7521 RB Enschede
The Netherlands
Digital Ground Fault unit
reference manual
www.groundfaultsystems.com
info@groundfaultsystems.com
Tel: +31 53 4318628
CofC: 55400914

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Summary of Contents for Ground Fault Systems DGF100

  • Page 1 DGF100 Digital Ground Fault unit reference manual Ground Fault Systems B.V. www.groundfaultsystems.com Rigtersbleek-Aalten 4B15 info@groundfaultsystems.com 7521 RB Enschede Tel: +31 53 4318628 The Netherlands CofC: 55400914...

  • Page 2: Table Of Contents

    DGF100 Display Figure 2 - Typical field connection with external Current Sensor and DGF100 display Figure 3 - Typical field connection with interposing Current Transformer and DGF100 display 25 Figure 4 - Dimensions DGF100 Figure 5 - Connection multiple DGF100s DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 3: General Description

    A single press of the RESET button, or an external, voltage free, momentary pushbutton connected to terminals R1 and T2/R2, resets the relay after a trip. A functional test of the DGF100 is started by either double clicking the cover mounted or external button, or by invoking a test on the DGF100 Display.

  • Page 4: Functionality

    1 for the setting values. 2.1.1 CS configuration / Dipswitch 1 The DGF100 is capable of measuring primary ground fault currents from 10 mA - 10000 A with trip level settings in different ranges:  30 mA - 9.0 A with the system power conductors passing through the built-in 46 mm CS.

  • Page 5: Operating Mode - Dipswitches 9

    The Failsafe mode can be used when the output relay is operating undervoltage (UV) devices. This includes: contactor coils; starter coils; and circuit breakers equipped with UV trip coils provided that the Control Voltage to the DGF100 is not interrupted by the action of the UV trip. Auto Reset operation The output relay does not change state when Control Voltage is applied.

  • Page 6: Led Indicators

    LED will flash. If the DGF100 is to be used for alarm only purposes (rather than to interrupt ongoing processes), and the alarm has to have an auto-resetting nature, then one has to use one of the Pulsed modes. The pulses will be repeated as long as current is above the set G/F level.

  • Page 7: External Current Sensor

    50 mm away from the unit. If the DGF100 is mounted on a 35 mm DIN rail, a ‘DIN rail ground terminal block’ can be installed beside the unit to act as the chassis ground point. Use a 2-2,5 mm (14 AWG) stranded conductor.

  • Page 8: Dgf100 Display

    ‘VERIFY’ pushbutton. By pushing the ‘VERIFY’ button on the DGF100 Display, it will show if the DGF100, to which it was connected at the time of trip, tripped due to a ground fault prior to loss of its Control Voltage by lighting the red ‘G/ F TRIP’ LED. If there was no ground fault trip prior to loss of Control Voltage the green ‘RUN’...
  • Page 9 ‘A’ - when using the built-in CS, an external CS, or a 500:5 ratio interposing CT. ‘kA’ - when using a 5000:5 ratio interposing CT. DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.
  • Page 10 The chassis ground must not be more than 50 mm away from the unit. If the DGF100 is mounted on a 35 mm DIN rail, a ‘DIN rail ground terminal block’ can be installed beside the unit to act as the chassis ground point.

  • Page 11: Connections And Precautions

    If the DGF100 is used for alarming only purposes, or if the G/F Trip Delay Time is set to 1 s or higher, verify that the DGF100 cannot be subjected to conditions exceeding its Thermal Withstand...
  • Page 12 13. If an external Reset pushbutton is being used, connect it to terminals R1 and T2/R2 of the DGF100 using twisted pair cable (of any gauge accepted by the terminals). If the distance between the button and the DGF100 exceeds 1 m, shielded cable is recommended, the shield being connected to chassis ground by means of a clamp, close to the DGF100 (where the FB terminal is bonded to chassis ground as well).

  • Page 13: Catalog Numbers

    * These current sensors are also available as a split core version, which adds /S to the name, e.g. when ordered the name changes to CS5-1517/S. Note: all the CS5, CS10, CS20 and CS100 type Current Sensors are for use with Ground Fault Systems devices only.

  • Page 14: Technical Specifications

    Maximum number of units that can be controlled in parallel from one voltage-free 6, all in the same enclosure button Back to Reset/ Test pushbutton. Back to Connections and precautions. DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 15: System Power

    III Insulation stripping length 7 mm Torque 0,4 - 0,6 Nm 0,5 – 2,5 mm (VDE) Field wiring 20 - 14 AWG (UL/CSA), Cu, solid or stranded DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 16: Relay Contacts

    Internal CS opening diameter 46 mm DIN rail if DIN rail mounted 35 mm Screws if screw mounted M4 x 20 (2 needed) Weight (open) 0,67 kg Weight (packaged) 0,70 kg DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 17: Display Datalink Circuit

    Vibration resistance (no malfunction) 10 G, 10 - 55 Hz at 1,5 mm double amplitude The DGF100 is encapsulated in Poly Urethane (PUR) to keep the exposure to mechanical shock and vibration to a minimum. DGF100 reference manual, rev 1, Feb 22, 2022...

  • Page 18: Applicable Standards

    General requirements for residual current operated protective devices UL 1053 Ground-Fault Sensing and Relaying Equipment, Class 1 C22.2 No. 144-M91 Ground Fault Circuit Interrupters CE mark – Declaration of Conformity DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 19: Tables And Figures

    Continuous Non-Failsafe operation Continuous Failsafe operation Pulsed Auto Reset operation (Pulse turns off 3 sec after G/F removed) Pulsed Non-Failsafe operation ♦ Factory settings Back to Dipswitch settings. DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.
  • Page 20 50,0 2,50 16,00 80,0 4,00 4,00 8,00 4,00 24,00 120,0 6,00 6,00 12,00 6,00 36,00 180,0 9,00 9,00 18,00 9,00 Back to General Description. Back to Table 1. DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 21: Tables 3 - Trip Time Accuracy

    2000 ms 2031 - 2081 ms 2007 - 2044 ms 1994 - 2028 ms 5000 ms 4890 - 5081 ms 4867 - 5044 ms 4853 - 5028 ms DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.
  • Page 22 1031 - 1081 ms 1007 - 1046 ms 2000 ms 2031 - 2081 ms 2007 - 2046 ms 5000 ms 4890 – 5081 ms 4866-5046 ms Back to Ground fault circuit. DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

  • Page 23: Dgf100 Display

    8.4 Figure 1 - Typical field connection using built-in Current Sensor, remote test/reset and DGF100 Display DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.
  • Page 24 8.5 Figure 2 - Typical field connection with external Current Sensor and DGF100 display DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.
  • Page 25 Figure 3 - Typical field connection with interposing Current Transformer and DGF100 display DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.
  • Page 26 Figure 4 - Dimensions DGF100 8.8 Figure 5 - Connection multiple DGF100s Back to Connections and precautions. DGF100 reference manual, rev 1, Feb 22, 2022 Ground Fault Systems B.V.

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