Hakaru
Hakaru HT-DGR Portable GR Or DGR Tester

Manufacturer: HAKARU PLUS CORPORATION
Model: HT-DGR
![]() | ![]() | ![]() |
![]() | ![]() | ![]() |
Product Description
This tester is used to perform simple operational tests on ground fault relays (GRs) and directional ground fault relays (DGRs) installed in power distribution equipment.
Compared to conventional testing equipment, it is smaller and lighter, allowing for smooth transport and testing in the field.
Powering the equipment with a mobile battery eliminates the need to carry heavy generators, thus reducing the burden on workers.
It offers four convenient modes for operating current testing and operating voltage testing, simplifying the output adjustment process.
This product uses a commercially available mobile battery.
Dropping a portable power bank or leaving it in a hot car can cause fires or burns.
Never drop it or leave it inside a car.
Features
- The main unit weighs approximately 1 kg.
Even including the mobile battery, hard case, and current/voltage output cable, it remains lightweight at approximately 2 kg. - The unit itself is compact, measuring 190W x 125D x 60H.
- This single unit supports both GR and DGR testing.
(Voltage 0-300V, Current 0-1.2A, Phase switching 0°, 180°) - Operating current characteristic testing and operating voltage characteristic testing can be selected from the four modes listed in the specifications section below.
- The power is supplied from a mobile battery.
- Various cables for testing are also included as accessories.
- The hard case has a neck strap attached, allowing for hands-free operation.
- The following safety features are included:
Mode switching operations will not be accepted when the output switch is ON.
The output switch will not turn ON if the adjustment volume is not at zero.
The device will automatically power off 5 minutes after the last switch operation.
Specification
Test mode
| mode | GR/DGR Exam | Current range | Voltage range |
|---|---|---|---|
| 1 | -GR test -Minimum operating current test -DGR test -Operating current test (general) -Operating voltage test (general) | 0~1,200A | 0-300.0V |
| 2 | -DGR Test- Minimum Operating Current Test (Voltage setting 5% = 191V) | 0~1,200A | 286V automatic setting (191V x 150%) |
| 3 | -DGR Test- Minimum Operating Voltage Test (Current Setting Value 0.2A) | 0.3A automatic setting (0.2A x 150%) | 0-300.0V |
| 4 | -DGR Test- Minimum Operating Current Test (for equipment tested at 1/10 of Mode 2) | 0~1,200A | 28.6V automatic setting (286V × 1/10) |
Related Products
-

Hakaru FH-60 Scale Length 46mm Type
-

Hakaru HLR-C8-OUT LoRa Radio Contact 8-Point Output Model
-

Hakaru XCS2-110 Electronic Color Multimeter Standard Type
-

Hakaru RRQK-D Rectangular (100 x 120) AC Ammeter (Rectified Type)
-

Hakaru DMH Digital Meter Relay: DC Ammeter, DC Voltmeter, Receiving Meter, AC Ammeter, AC Voltmeter
-

Hakaru RRK-G Rectangular (83 x 83) AC Ammeter (Rectified Type)











